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/symbolTable.hpp" 32 #include "classfile/systemDictionary.hpp" 33 #include "classfile/verificationType.hpp" 34 #include "classfile/verifier.hpp" 35 #include "classfile/vmSymbols.hpp" 36 #include "gc/shared/gcLocker.hpp" 37 #include "memory/allocation.hpp" 38 #include "memory/metadataFactory.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "memory/universe.inline.hpp" 42 #include "oops/annotations.hpp" 43 #include "oops/fieldStreams.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceMirrorKlass.hpp" 46 #include "oops/klass.inline.hpp" 47 #include "oops/klassVtable.hpp" 48 #include "oops/metadata.hpp" 49 #include "oops/method.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "prims/jvm.h" 53 #include "prims/jvmtiExport.hpp" 54 #include "prims/jvmtiThreadState.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/perfData.hpp" 57 #include "runtime/reflection.hpp" 58 #include "runtime/signature.hpp" 59 #include "runtime/timer.hpp" 60 #include "services/classLoadingService.hpp" 61 #include "services/threadService.hpp" 62 #include "trace/traceMacros.hpp" 63 #include "utilities/array.hpp" 64 #include "utilities/exceptions.hpp" 65 #include "utilities/globalDefinitions.hpp" 66 #include "utilities/macros.hpp" 67 #include "utilities/ostream.hpp" 68 #include "utilities/resourceHash.hpp" 69 #if INCLUDE_CDS 70 #include "classfile/systemDictionaryShared.hpp" 71 #endif 72 73 // We generally try to create the oops directly when parsing, rather than 74 // allocating temporary data structures and copying the bytes twice. A 75 // temporary area is only needed when parsing utf8 entries in the constant 76 // pool and when parsing line number tables. 77 78 // We add assert in debug mode when class format is not checked. 79 80 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 81 #define JAVA_MIN_SUPPORTED_VERSION 45 82 #define JAVA_MAX_SUPPORTED_VERSION 52 83 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 84 85 // Used for two backward compatibility reasons: 86 // - to check for new additions to the class file format in JDK1.5 87 // - to check for bug fixes in the format checker in JDK1.5 88 #define JAVA_1_5_VERSION 49 89 90 // Used for backward compatibility reasons: 91 // - to check for javac bug fixes that happened after 1.5 92 // - also used as the max version when running in jdk6 93 #define JAVA_6_VERSION 50 94 95 // Used for backward compatibility reasons: 96 // - to check NameAndType_info signatures more aggressively 97 // - to disallow argument and require ACC_STATIC for <clinit> methods 98 #define JAVA_7_VERSION 51 99 100 // Extension method support. 101 #define JAVA_8_VERSION 52 102 103 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names 104 105 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 106 ConstantPool* cp, 107 const int length, 108 TRAPS) { 109 assert(stream != NULL, "invariant"); 110 assert(cp != NULL, "invariant"); 111 112 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 113 // this function (_current can be allocated in a register, with scalar 114 // replacement of aggregates). The _current pointer is copied back to 115 // stream() when this function returns. DON'T call another method within 116 // this method that uses stream(). 117 const ClassFileStream cfs1 = *stream; 118 const ClassFileStream* const cfs = &cfs1; 119 120 assert(cfs->allocated_on_stack(), "should be local"); 121 debug_only(const u1* const old_current = stream->current();) 122 123 // Used for batching symbol allocations. 124 const char* names[SymbolTable::symbol_alloc_batch_size]; 125 int lengths[SymbolTable::symbol_alloc_batch_size]; 126 int indices[SymbolTable::symbol_alloc_batch_size]; 127 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 128 int names_count = 0; 129 130 // parsing Index 0 is unused 131 for (int index = 1; index < length; index++) { 132 // Each of the following case guarantees one more byte in the stream 133 // for the following tag or the access_flags following constant pool, 134 // so we don't need bounds-check for reading tag. 135 const u1 tag = cfs->get_u1_fast(); 136 switch (tag) { 137 case JVM_CONSTANT_Class : { 138 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 139 const u2 name_index = cfs->get_u2_fast(); 140 cp->klass_index_at_put(index, name_index); 141 break; 142 } 143 case JVM_CONSTANT_Fieldref: { 144 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 145 const u2 class_index = cfs->get_u2_fast(); 146 const u2 name_and_type_index = cfs->get_u2_fast(); 147 cp->field_at_put(index, class_index, name_and_type_index); 148 break; 149 } 150 case JVM_CONSTANT_Methodref: { 151 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 152 const u2 class_index = cfs->get_u2_fast(); 153 const u2 name_and_type_index = cfs->get_u2_fast(); 154 cp->method_at_put(index, class_index, name_and_type_index); 155 break; 156 } 157 case JVM_CONSTANT_InterfaceMethodref: { 158 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 159 const u2 class_index = cfs->get_u2_fast(); 160 const u2 name_and_type_index = cfs->get_u2_fast(); 161 cp->interface_method_at_put(index, class_index, name_and_type_index); 162 break; 163 } 164 case JVM_CONSTANT_String : { 165 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 166 const u2 string_index = cfs->get_u2_fast(); 167 cp->string_index_at_put(index, string_index); 168 break; 169 } 170 case JVM_CONSTANT_MethodHandle : 171 case JVM_CONSTANT_MethodType: { 172 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 173 classfile_parse_error( 174 "Class file version does not support constant tag %u in class file %s", 175 tag, CHECK); 176 } 177 if (tag == JVM_CONSTANT_MethodHandle) { 178 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 179 const u1 ref_kind = cfs->get_u1_fast(); 180 const u2 method_index = cfs->get_u2_fast(); 181 cp->method_handle_index_at_put(index, ref_kind, method_index); 182 } 183 else if (tag == JVM_CONSTANT_MethodType) { 184 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 185 const u2 signature_index = cfs->get_u2_fast(); 186 cp->method_type_index_at_put(index, signature_index); 187 } 188 else { 189 ShouldNotReachHere(); 190 } 191 break; 192 } 193 case JVM_CONSTANT_InvokeDynamic : { 194 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 195 classfile_parse_error( 196 "Class file version does not support constant tag %u in class file %s", 197 tag, CHECK); 198 } 199 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 200 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 201 const u2 name_and_type_index = cfs->get_u2_fast(); 202 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 203 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 204 } 205 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 206 break; 207 } 208 case JVM_CONSTANT_Integer: { 209 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 210 const u4 bytes = cfs->get_u4_fast(); 211 cp->int_at_put(index, (jint)bytes); 212 break; 213 } 214 case JVM_CONSTANT_Float: { 215 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 216 const u4 bytes = cfs->get_u4_fast(); 217 cp->float_at_put(index, *(jfloat*)&bytes); 218 break; 219 } 220 case JVM_CONSTANT_Long: { 221 // A mangled type might cause you to overrun allocated memory 222 guarantee_property(index + 1 < length, 223 "Invalid constant pool entry %u in class file %s", 224 index, 225 CHECK); 226 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 227 const u8 bytes = cfs->get_u8_fast(); 228 cp->long_at_put(index, bytes); 229 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 230 break; 231 } 232 case JVM_CONSTANT_Double: { 233 // A mangled type might cause you to overrun allocated memory 234 guarantee_property(index+1 < length, 235 "Invalid constant pool entry %u in class file %s", 236 index, 237 CHECK); 238 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 239 const u8 bytes = cfs->get_u8_fast(); 240 cp->double_at_put(index, *(jdouble*)&bytes); 241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 242 break; 243 } 244 case JVM_CONSTANT_NameAndType: { 245 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 246 const u2 name_index = cfs->get_u2_fast(); 247 const u2 signature_index = cfs->get_u2_fast(); 248 cp->name_and_type_at_put(index, name_index, signature_index); 249 break; 250 } 251 case JVM_CONSTANT_Utf8 : { 252 cfs->guarantee_more(2, CHECK); // utf8_length 253 u2 utf8_length = cfs->get_u2_fast(); 254 const u1* utf8_buffer = cfs->get_u1_buffer(); 255 assert(utf8_buffer != NULL, "null utf8 buffer"); 256 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 257 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 258 cfs->skip_u1_fast(utf8_length); 259 260 // Before storing the symbol, make sure it's legal 261 if (_need_verify) { 262 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 263 } 264 265 if (has_cp_patch_at(index)) { 266 Handle patch = clear_cp_patch_at(index); 267 guarantee_property(java_lang_String::is_instance(patch()), 268 "Illegal utf8 patch at %d in class file %s", 269 index, 270 CHECK); 271 const char* const str = java_lang_String::as_utf8_string(patch()); 272 // (could use java_lang_String::as_symbol instead, but might as well batch them) 273 utf8_buffer = (const u1*) str; 274 utf8_length = (int) strlen(str); 275 } 276 277 unsigned int hash; 278 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 279 utf8_length, 280 hash); 281 if (result == NULL) { 282 names[names_count] = (const char*)utf8_buffer; 283 lengths[names_count] = utf8_length; 284 indices[names_count] = index; 285 hashValues[names_count++] = hash; 286 if (names_count == SymbolTable::symbol_alloc_batch_size) { 287 SymbolTable::new_symbols(_loader_data, 288 cp, 289 names_count, 290 names, 291 lengths, 292 indices, 293 hashValues, 294 CHECK); 295 names_count = 0; 296 } 297 } else { 298 cp->symbol_at_put(index, result); 299 } 300 break; 301 } 302 default: { 303 classfile_parse_error("Unknown constant tag %u in class file %s", 304 tag, 305 CHECK); 306 break; 307 } 308 } // end of switch(tag) 309 } // end of for 310 311 // Allocate the remaining symbols 312 if (names_count > 0) { 313 SymbolTable::new_symbols(_loader_data, 314 cp, 315 names_count, 316 names, 317 lengths, 318 indices, 319 hashValues, 320 CHECK); 321 } 322 323 // Copy _current pointer of local copy back to stream. 324 assert(stream->current() == old_current, "non-exclusive use of stream"); 325 stream->set_current(cfs1.current()); 326 327 } 328 329 static inline bool valid_cp_range(int index, int length) { 330 return (index > 0 && index < length); 331 } 332 333 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 334 assert(cp != NULL, "invariant"); 335 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 336 return cp->symbol_at(index); 337 } 338 return NULL; 339 } 340 341 #ifdef ASSERT 342 PRAGMA_DIAG_PUSH 343 PRAGMA_FORMAT_NONLITERAL_IGNORED 344 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 345 ResourceMark rm(THREAD); 346 fatal(msg, _class_name->as_C_string()); 347 } 348 349 void ClassFileParser::report_assert_property_failure(const char* msg, 350 int index, 351 TRAPS) const { 352 ResourceMark rm(THREAD); 353 fatal(msg, index, _class_name->as_C_string()); 354 } 355 PRAGMA_DIAG_POP 356 #endif 357 358 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 359 ConstantPool* const cp, 360 const int length, 361 TRAPS) { 362 assert(cp != NULL, "invariant"); 363 assert(stream != NULL, "invariant"); 364 365 // parsing constant pool entries 366 parse_constant_pool_entries(stream, cp, length, CHECK); 367 368 int index = 1; // declared outside of loops for portability 369 370 // first verification pass - validate cross references 371 // and fixup class and string constants 372 for (index = 1; index < length; index++) { // Index 0 is unused 373 const jbyte tag = cp->tag_at(index).value(); 374 switch (tag) { 375 case JVM_CONSTANT_Class: { 376 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 377 break; 378 } 379 case JVM_CONSTANT_Fieldref: 380 // fall through 381 case JVM_CONSTANT_Methodref: 382 // fall through 383 case JVM_CONSTANT_InterfaceMethodref: { 384 if (!_need_verify) break; 385 const int klass_ref_index = cp->klass_ref_index_at(index); 386 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 387 check_property(valid_klass_reference_at(klass_ref_index), 388 "Invalid constant pool index %u in class file %s", 389 klass_ref_index, CHECK); 390 check_property(valid_cp_range(name_and_type_ref_index, length) && 391 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 392 "Invalid constant pool index %u in class file %s", 393 name_and_type_ref_index, CHECK); 394 break; 395 } 396 case JVM_CONSTANT_String: { 397 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 398 break; 399 } 400 case JVM_CONSTANT_Integer: 401 break; 402 case JVM_CONSTANT_Float: 403 break; 404 case JVM_CONSTANT_Long: 405 case JVM_CONSTANT_Double: { 406 index++; 407 check_property( 408 (index < length && cp->tag_at(index).is_invalid()), 409 "Improper constant pool long/double index %u in class file %s", 410 index, CHECK); 411 break; 412 } 413 case JVM_CONSTANT_NameAndType: { 414 if (!_need_verify) break; 415 const int name_ref_index = cp->name_ref_index_at(index); 416 const int signature_ref_index = cp->signature_ref_index_at(index); 417 check_property(valid_symbol_at(name_ref_index), 418 "Invalid constant pool index %u in class file %s", 419 name_ref_index, CHECK); 420 check_property(valid_symbol_at(signature_ref_index), 421 "Invalid constant pool index %u in class file %s", 422 signature_ref_index, CHECK); 423 break; 424 } 425 case JVM_CONSTANT_Utf8: 426 break; 427 case JVM_CONSTANT_UnresolvedClass: // fall-through 428 case JVM_CONSTANT_UnresolvedClassInError: { 429 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 430 break; 431 } 432 case JVM_CONSTANT_ClassIndex: { 433 const int class_index = cp->klass_index_at(index); 434 check_property(valid_symbol_at(class_index), 435 "Invalid constant pool index %u in class file %s", 436 class_index, CHECK); 437 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); 438 break; 439 } 440 case JVM_CONSTANT_StringIndex: { 441 const int string_index = cp->string_index_at(index); 442 check_property(valid_symbol_at(string_index), 443 "Invalid constant pool index %u in class file %s", 444 string_index, CHECK); 445 Symbol* const sym = cp->symbol_at(string_index); 446 cp->unresolved_string_at_put(index, sym); 447 break; 448 } 449 case JVM_CONSTANT_MethodHandle: { 450 const int ref_index = cp->method_handle_index_at(index); 451 check_property(valid_cp_range(ref_index, length), 452 "Invalid constant pool index %u in class file %s", 453 ref_index, CHECK); 454 const constantTag tag = cp->tag_at(ref_index); 455 const int ref_kind = cp->method_handle_ref_kind_at(index); 456 457 switch (ref_kind) { 458 case JVM_REF_getField: 459 case JVM_REF_getStatic: 460 case JVM_REF_putField: 461 case JVM_REF_putStatic: { 462 check_property( 463 tag.is_field(), 464 "Invalid constant pool index %u in class file %s (not a field)", 465 ref_index, CHECK); 466 break; 467 } 468 case JVM_REF_invokeVirtual: 469 case JVM_REF_newInvokeSpecial: { 470 check_property( 471 tag.is_method(), 472 "Invalid constant pool index %u in class file %s (not a method)", 473 ref_index, CHECK); 474 break; 475 } 476 case JVM_REF_invokeStatic: 477 case JVM_REF_invokeSpecial: { 478 check_property( 479 tag.is_method() || 480 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 481 "Invalid constant pool index %u in class file %s (not a method)", 482 ref_index, CHECK); 483 break; 484 } 485 case JVM_REF_invokeInterface: { 486 check_property( 487 tag.is_interface_method(), 488 "Invalid constant pool index %u in class file %s (not an interface method)", 489 ref_index, CHECK); 490 break; 491 } 492 default: { 493 classfile_parse_error( 494 "Bad method handle kind at constant pool index %u in class file %s", 495 index, CHECK); 496 } 497 } // switch(refkind) 498 // Keep the ref_index unchanged. It will be indirected at link-time. 499 break; 500 } // case MethodHandle 501 case JVM_CONSTANT_MethodType: { 502 const int ref_index = cp->method_type_index_at(index); 503 check_property(valid_symbol_at(ref_index), 504 "Invalid constant pool index %u in class file %s", 505 ref_index, CHECK); 506 break; 507 } 508 case JVM_CONSTANT_InvokeDynamic: { 509 const int name_and_type_ref_index = 510 cp->invoke_dynamic_name_and_type_ref_index_at(index); 511 512 check_property(valid_cp_range(name_and_type_ref_index, length) && 513 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 514 "Invalid constant pool index %u in class file %s", 515 name_and_type_ref_index, CHECK); 516 // bootstrap specifier index must be checked later, 517 // when BootstrapMethods attr is available 518 break; 519 } 520 default: { 521 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 522 ShouldNotReachHere(); 523 break; 524 } 525 } // switch(tag) 526 } // end of for 527 528 if (_cp_patches != NULL) { 529 // need to treat this_class specially... 530 int this_class_index; 531 { 532 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 533 const u1* const mark = stream->current(); 534 stream->skip_u2_fast(1); // skip flags 535 this_class_index = stream->get_u2_fast(); 536 stream->set_current(mark); // revert to mark 537 } 538 539 for (index = 1; index < length; index++) { // Index 0 is unused 540 if (has_cp_patch_at(index)) { 541 guarantee_property(index != this_class_index, 542 "Illegal constant pool patch to self at %d in class file %s", 543 index, CHECK); 544 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 545 } 546 } 547 } 548 549 if (!_need_verify) { 550 return; 551 } 552 553 // second verification pass - checks the strings are of the right format. 554 // but not yet to the other entries 555 for (index = 1; index < length; index++) { 556 const jbyte tag = cp->tag_at(index).value(); 557 switch (tag) { 558 case JVM_CONSTANT_UnresolvedClass: { 559 const Symbol* const class_name = cp->klass_name_at(index); 560 // check the name, even if _cp_patches will overwrite it 561 verify_legal_class_name(class_name, CHECK); 562 break; 563 } 564 case JVM_CONSTANT_NameAndType: { 565 if (_need_verify && _major_version >= JAVA_7_VERSION) { 566 const int sig_index = cp->signature_ref_index_at(index); 567 const int name_index = cp->name_ref_index_at(index); 568 const Symbol* const name = cp->symbol_at(name_index); 569 const Symbol* const sig = cp->symbol_at(sig_index); 570 guarantee_property(sig->utf8_length() != 0, 571 "Illegal zero length constant pool entry at %d in class %s", 572 sig_index, CHECK); 573 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 574 verify_legal_method_signature(name, sig, CHECK); 575 } else { 576 verify_legal_field_signature(name, sig, CHECK); 577 } 578 } 579 break; 580 } 581 case JVM_CONSTANT_InvokeDynamic: 582 case JVM_CONSTANT_Fieldref: 583 case JVM_CONSTANT_Methodref: 584 case JVM_CONSTANT_InterfaceMethodref: { 585 const int name_and_type_ref_index = 586 cp->name_and_type_ref_index_at(index); 587 // already verified to be utf8 588 const int name_ref_index = 589 cp->name_ref_index_at(name_and_type_ref_index); 590 // already verified to be utf8 591 const int signature_ref_index = 592 cp->signature_ref_index_at(name_and_type_ref_index); 593 const Symbol* const name = cp->symbol_at(name_ref_index); 594 const Symbol* const signature = cp->symbol_at(signature_ref_index); 595 if (tag == JVM_CONSTANT_Fieldref) { 596 verify_legal_field_name(name, CHECK); 597 if (_need_verify && _major_version >= JAVA_7_VERSION) { 598 // Signature is verified above, when iterating NameAndType_info. 599 // Need only to be sure it's non-zero length and the right type. 600 if (signature->utf8_length() == 0 || 601 signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 602 throwIllegalSignature( 603 "Field", name, signature, CHECK); 604 } 605 } else { 606 verify_legal_field_signature(name, signature, CHECK); 607 } 608 } else { 609 verify_legal_method_name(name, CHECK); 610 if (_need_verify && _major_version >= JAVA_7_VERSION) { 611 // Signature is verified above, when iterating NameAndType_info. 612 // Need only to be sure it's non-zero length and the right type. 613 if (signature->utf8_length() == 0 || 614 signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 615 throwIllegalSignature( 616 "Method", name, signature, CHECK); 617 } 618 } else { 619 verify_legal_method_signature(name, signature, CHECK); 620 } 621 if (tag == JVM_CONSTANT_Methodref) { 622 // 4509014: If a class method name begins with '<', it must be "<init>". 623 assert(name != NULL, "method name in constant pool is null"); 624 const unsigned int name_len = name->utf8_length(); 625 if (name_len != 0 && name->byte_at(0) == '<') { 626 if (name != vmSymbols::object_initializer_name()) { 627 classfile_parse_error( 628 "Bad method name at constant pool index %u in class file %s", 629 name_ref_index, CHECK); 630 } 631 } 632 } 633 } 634 break; 635 } 636 case JVM_CONSTANT_MethodHandle: { 637 const int ref_index = cp->method_handle_index_at(index); 638 const int ref_kind = cp->method_handle_ref_kind_at(index); 639 switch (ref_kind) { 640 case JVM_REF_invokeVirtual: 641 case JVM_REF_invokeStatic: 642 case JVM_REF_invokeSpecial: 643 case JVM_REF_newInvokeSpecial: { 644 const int name_and_type_ref_index = 645 cp->name_and_type_ref_index_at(ref_index); 646 const int name_ref_index = 647 cp->name_ref_index_at(name_and_type_ref_index); 648 const Symbol* const name = cp->symbol_at(name_ref_index); 649 if (ref_kind == JVM_REF_newInvokeSpecial) { 650 if (name != vmSymbols::object_initializer_name()) { 651 classfile_parse_error( 652 "Bad constructor name at constant pool index %u in class file %s", 653 name_ref_index, CHECK); 654 } 655 } else { 656 if (name == vmSymbols::object_initializer_name()) { 657 classfile_parse_error( 658 "Bad method name at constant pool index %u in class file %s", 659 name_ref_index, CHECK); 660 } 661 } 662 break; 663 } 664 // Other ref_kinds are already fully checked in previous pass. 665 } // switch(ref_kind) 666 break; 667 } 668 case JVM_CONSTANT_MethodType: { 669 const Symbol* const no_name = vmSymbols::type_name(); // place holder 670 const Symbol* const signature = cp->method_type_signature_at(index); 671 verify_legal_method_signature(no_name, signature, CHECK); 672 break; 673 } 674 case JVM_CONSTANT_Utf8: { 675 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 676 } 677 } // switch(tag) 678 } // end of for 679 } 680 681 void ClassFileParser::patch_constant_pool(ConstantPool* cp, 682 int index, 683 Handle patch, 684 TRAPS) { 685 assert(cp != NULL, "invariant"); 686 687 BasicType patch_type = T_VOID; 688 689 switch (cp->tag_at(index).value()) { 690 691 case JVM_CONSTANT_UnresolvedClass: { 692 // Patching a class means pre-resolving it. 693 // The name in the constant pool is ignored. 694 if (java_lang_Class::is_instance(patch())) { 695 guarantee_property(!java_lang_Class::is_primitive(patch()), 696 "Illegal class patch at %d in class file %s", 697 index, CHECK); 698 cp->klass_at_put(index, java_lang_Class::as_Klass(patch())); 699 } else { 700 guarantee_property(java_lang_String::is_instance(patch()), 701 "Illegal class patch at %d in class file %s", 702 index, CHECK); 703 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 704 cp->unresolved_klass_at_put(index, name); 705 } 706 break; 707 } 708 709 case JVM_CONSTANT_String: { 710 // skip this patch and don't clear it. Needs the oop array for resolved 711 // references to be created first. 712 return; 713 } 714 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 715 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 716 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 717 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 718 patch_prim: 719 { 720 jvalue value; 721 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 722 guarantee_property(value_type == patch_type, 723 "Illegal primitive patch at %d in class file %s", 724 index, CHECK); 725 switch (value_type) { 726 case T_INT: cp->int_at_put(index, value.i); break; 727 case T_FLOAT: cp->float_at_put(index, value.f); break; 728 case T_LONG: cp->long_at_put(index, value.j); break; 729 case T_DOUBLE: cp->double_at_put(index, value.d); break; 730 default: assert(false, ""); 731 } 732 } // end patch_prim label 733 break; 734 735 default: { 736 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 737 guarantee_property(!has_cp_patch_at(index), 738 "Illegal unexpected patch at %d in class file %s", 739 index, CHECK); 740 return; 741 } 742 } // end of switch(tag) 743 744 // On fall-through, mark the patch as used. 745 clear_cp_patch_at(index); 746 } 747 class NameSigHash: public ResourceObj { 748 public: 749 const Symbol* _name; // name 750 const Symbol* _sig; // signature 751 NameSigHash* _next; // Next entry in hash table 752 }; 753 754 static const int HASH_ROW_SIZE = 256; 755 756 static unsigned int hash(const Symbol* name, const Symbol* sig) { 757 unsigned int raw_hash = 0; 758 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 759 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 760 761 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 762 } 763 764 765 static void initialize_hashtable(NameSigHash** table) { 766 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 767 } 768 // Return false if the name/sig combination is found in table. 769 // Return true if no duplicate is found. And name/sig is added as a new entry in table. 770 // The old format checker uses heap sort to find duplicates. 771 // NOTE: caller should guarantee that GC doesn't happen during the life cycle 772 // of table since we don't expect Symbol*'s to move. 773 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 774 assert(name != NULL, "name in constant pool is NULL"); 775 776 // First lookup for duplicates 777 int index = hash(name, sig); 778 NameSigHash* entry = table[index]; 779 while (entry != NULL) { 780 if (entry->_name == name && entry->_sig == sig) { 781 return false; 782 } 783 entry = entry->_next; 784 } 785 786 // No duplicate is found, allocate a new entry and fill it. 787 entry = new NameSigHash(); 788 entry->_name = name; 789 entry->_sig = sig; 790 791 // Insert into hash table 792 entry->_next = table[index]; 793 table[index] = entry; 794 795 return true; 796 } 797 798 // Side-effects: populates the _local_interfaces field 799 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 800 const int itfs_len, 801 ConstantPool* const cp, 802 bool* const has_default_methods, 803 TRAPS) { 804 assert(stream != NULL, "invariant"); 805 assert(cp != NULL, "invariant"); 806 assert(has_default_methods != NULL, "invariant"); 807 808 if (itfs_len == 0) { 809 _local_interfaces = Universe::the_empty_klass_array(); 810 } else { 811 assert(itfs_len > 0, "only called for len>0"); 812 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 813 814 int index; 815 for (index = 0; index < itfs_len; index++) { 816 const u2 interface_index = stream->get_u2(CHECK); 817 KlassHandle interf; 818 check_property( 819 valid_klass_reference_at(interface_index), 820 "Interface name has bad constant pool index %u in class file %s", 821 interface_index, CHECK); 822 if (cp->tag_at(interface_index).is_klass()) { 823 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); 824 } else { 825 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 826 827 // Don't need to check legal name because it's checked when parsing constant pool. 828 // But need to make sure it's not an array type. 829 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 830 "Bad interface name in class file %s", CHECK); 831 832 // Call resolve_super so classcircularity is checked 833 const Klass* const k = 834 SystemDictionary::resolve_super_or_fail(_class_name, 835 unresolved_klass, 836 _loader_data->class_loader(), 837 _protection_domain, 838 false, 839 CHECK); 840 interf = KlassHandle(THREAD, k); 841 } 842 843 if (!interf()->is_interface()) { 844 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 845 "Implementing class"); 846 } 847 848 if (InstanceKlass::cast(interf())->has_default_methods()) { 849 *has_default_methods = true; 850 } 851 _local_interfaces->at_put(index, interf()); 852 } 853 854 if (!_need_verify || itfs_len <= 1) { 855 return; 856 } 857 858 // Check if there's any duplicates in interfaces 859 ResourceMark rm(THREAD); 860 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 861 NameSigHash*, 862 HASH_ROW_SIZE); 863 initialize_hashtable(interface_names); 864 bool dup = false; 865 { 866 debug_only(NoSafepointVerifier nsv;) 867 for (index = 0; index < itfs_len; index++) { 868 const Klass* const k = _local_interfaces->at(index); 869 const Symbol* const name = InstanceKlass::cast(k)->name(); 870 // If no duplicates, add (name, NULL) in hashtable interface_names. 871 if (!put_after_lookup(name, NULL, interface_names)) { 872 dup = true; 873 break; 874 } 875 } 876 } 877 if (dup) { 878 classfile_parse_error("Duplicate interface name in class file %s", CHECK); 879 } 880 } 881 } 882 883 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 884 int constantvalue_index, 885 int signature_index, 886 TRAPS) const { 887 // Make sure the constant pool entry is of a type appropriate to this field 888 guarantee_property( 889 (constantvalue_index > 0 && 890 constantvalue_index < cp->length()), 891 "Bad initial value index %u in ConstantValue attribute in class file %s", 892 constantvalue_index, CHECK); 893 894 const constantTag value_type = cp->tag_at(constantvalue_index); 895 switch(cp->basic_type_for_signature_at(signature_index)) { 896 case T_LONG: { 897 guarantee_property(value_type.is_long(), 898 "Inconsistent constant value type in class file %s", 899 CHECK); 900 break; 901 } 902 case T_FLOAT: { 903 guarantee_property(value_type.is_float(), 904 "Inconsistent constant value type in class file %s", 905 CHECK); 906 break; 907 } 908 case T_DOUBLE: { 909 guarantee_property(value_type.is_double(), 910 "Inconsistent constant value type in class file %s", 911 CHECK); 912 break; 913 } 914 case T_BYTE: 915 case T_CHAR: 916 case T_SHORT: 917 case T_BOOLEAN: 918 case T_INT: { 919 guarantee_property(value_type.is_int(), 920 "Inconsistent constant value type in class file %s", 921 CHECK); 922 break; 923 } 924 case T_OBJECT: { 925 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 926 && value_type.is_string()), 927 "Bad string initial value in class file %s", 928 CHECK); 929 break; 930 } 931 default: { 932 classfile_parse_error("Unable to set initial value %u in class file %s", 933 constantvalue_index, 934 CHECK); 935 } 936 } 937 } 938 939 class AnnotationCollector : public ResourceObj{ 940 public: 941 enum Location { _in_field, _in_method, _in_class }; 942 enum ID { 943 _unknown = 0, 944 _method_CallerSensitive, 945 _method_ForceInline, 946 _method_DontInline, 947 _method_InjectedProfile, 948 _method_LambdaForm_Compiled, 949 _method_LambdaForm_Hidden, 950 _method_HotSpotIntrinsicCandidate, 951 _jdk_internal_vm_annotation_Contended, 952 _field_Stable, 953 _jdk_internal_vm_annotation_ReservedStackAccess, 954 _annotation_LIMIT 955 }; 956 const Location _location; 957 int _annotations_present; 958 u2 _contended_group; 959 960 AnnotationCollector(Location location) 961 : _location(location), _annotations_present(0) 962 { 963 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 964 } 965 // If this annotation name has an ID, report it (or _none). 966 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 967 // Set the annotation name: 968 void set_annotation(ID id) { 969 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 970 _annotations_present |= nth_bit((int)id); 971 } 972 973 void remove_annotation(ID id) { 974 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 975 _annotations_present &= ~nth_bit((int)id); 976 } 977 978 // Report if the annotation is present. 979 bool has_any_annotations() const { return _annotations_present != 0; } 980 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 981 982 void set_contended_group(u2 group) { _contended_group = group; } 983 u2 contended_group() const { return _contended_group; } 984 985 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 986 987 void set_stable(bool stable) { set_annotation(_field_Stable); } 988 bool is_stable() const { return has_annotation(_field_Stable); } 989 }; 990 991 // This class also doubles as a holder for metadata cleanup. 992 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 993 private: 994 ClassLoaderData* _loader_data; 995 AnnotationArray* _field_annotations; 996 AnnotationArray* _field_type_annotations; 997 public: 998 FieldAnnotationCollector(ClassLoaderData* loader_data) : 999 AnnotationCollector(_in_field), 1000 _loader_data(loader_data), 1001 _field_annotations(NULL), 1002 _field_type_annotations(NULL) {} 1003 ~FieldAnnotationCollector(); 1004 void apply_to(FieldInfo* f); 1005 AnnotationArray* field_annotations() { return _field_annotations; } 1006 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1007 1008 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1009 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1010 }; 1011 1012 class MethodAnnotationCollector : public AnnotationCollector{ 1013 public: 1014 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1015 void apply_to(methodHandle m); 1016 }; 1017 1018 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1019 public: 1020 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1021 void apply_to(InstanceKlass* ik); 1022 }; 1023 1024 1025 static int skip_annotation_value(const u1*, int, int); // fwd decl 1026 1027 // Skip an annotation. Return >=limit if there is any problem. 1028 static int skip_annotation(const u1* buffer, int limit, int index) { 1029 assert(buffer != NULL, "invariant"); 1030 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1031 // value := switch (tag:u1) { ... } 1032 index += 2; // skip atype 1033 if ((index += 2) >= limit) return limit; // read nmem 1034 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1035 while (--nmem >= 0 && index < limit) { 1036 index += 2; // skip member 1037 index = skip_annotation_value(buffer, limit, index); 1038 } 1039 return index; 1040 } 1041 1042 // Skip an annotation value. Return >=limit if there is any problem. 1043 static int skip_annotation_value(const u1* buffer, int limit, int index) { 1044 assert(buffer != NULL, "invariant"); 1045 1046 // value := switch (tag:u1) { 1047 // case B, C, I, S, Z, D, F, J, c: con:u2; 1048 // case e: e_class:u2 e_name:u2; 1049 // case s: s_con:u2; 1050 // case [: do(nval:u2) {value}; 1051 // case @: annotation; 1052 // case s: s_con:u2; 1053 // } 1054 if ((index += 1) >= limit) return limit; // read tag 1055 const u1 tag = buffer[index - 1]; 1056 switch (tag) { 1057 case 'B': 1058 case 'C': 1059 case 'I': 1060 case 'S': 1061 case 'Z': 1062 case 'D': 1063 case 'F': 1064 case 'J': 1065 case 'c': 1066 case 's': 1067 index += 2; // skip con or s_con 1068 break; 1069 case 'e': 1070 index += 4; // skip e_class, e_name 1071 break; 1072 case '[': 1073 { 1074 if ((index += 2) >= limit) return limit; // read nval 1075 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1076 while (--nval >= 0 && index < limit) { 1077 index = skip_annotation_value(buffer, limit, index); 1078 } 1079 } 1080 break; 1081 case '@': 1082 index = skip_annotation(buffer, limit, index); 1083 break; 1084 default: 1085 return limit; // bad tag byte 1086 } 1087 return index; 1088 } 1089 1090 // Sift through annotations, looking for those significant to the VM: 1091 static void parse_annotations(const ConstantPool* const cp, 1092 const u1* buffer, int limit, 1093 AnnotationCollector* coll, 1094 ClassLoaderData* loader_data, 1095 TRAPS) { 1096 1097 assert(cp != NULL, "invariant"); 1098 assert(buffer != NULL, "invariant"); 1099 assert(coll != NULL, "invariant"); 1100 assert(loader_data != NULL, "invariant"); 1101 1102 // annotations := do(nann:u2) {annotation} 1103 int index = 0; 1104 if ((index += 2) >= limit) return; // read nann 1105 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1106 enum { // initial annotation layout 1107 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1108 count_off = 2, // u2 such as 1 (one value) 1109 member_off = 4, // utf8 such as 'value' 1110 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1111 e_tag_val = 'e', 1112 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1113 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1114 e_size = 11, // end of 'e' annotation 1115 c_tag_val = 'c', // payload is type 1116 c_con_off = 7, // utf8 payload, such as 'I' 1117 c_size = 9, // end of 'c' annotation 1118 s_tag_val = 's', // payload is String 1119 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1120 s_size = 9, 1121 min_size = 6 // smallest possible size (zero members) 1122 }; 1123 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) { 1124 int index0 = index; 1125 index = skip_annotation(buffer, limit, index); 1126 const u1* const abase = buffer + index0; 1127 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1128 const int count = Bytes::get_Java_u2((address)abase + count_off); 1129 const Symbol* const aname = check_symbol_at(cp, atype); 1130 if (aname == NULL) break; // invalid annotation name 1131 const Symbol* member = NULL; 1132 if (count >= 1) { 1133 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1134 member = check_symbol_at(cp, member_index); 1135 if (member == NULL) break; // invalid member name 1136 } 1137 1138 // Here is where parsing particular annotations will take place. 1139 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1140 if (AnnotationCollector::_unknown == id) continue; 1141 coll->set_annotation(id); 1142 1143 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1144 // @Contended can optionally specify the contention group. 1145 // 1146 // Contended group defines the equivalence class over the fields: 1147 // the fields within the same contended group are not treated distinct. 1148 // The only exception is default group, which does not incur the 1149 // equivalence. Naturally, contention group for classes is meaningless. 1150 // 1151 // While the contention group is specified as String, annotation 1152 // values are already interned, and we might as well use the constant 1153 // pool index as the group tag. 1154 // 1155 u2 group_index = 0; // default contended group 1156 if (count == 1 1157 && s_size == (index - index0) // match size 1158 && s_tag_val == *(abase + tag_off) 1159 && member == vmSymbols::value_name()) { 1160 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1161 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1162 group_index = 0; // default contended group 1163 } 1164 } 1165 coll->set_contended_group(group_index); 1166 } 1167 } 1168 } 1169 1170 1171 // Parse attributes for a field. 1172 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1173 u2 attributes_count, 1174 bool is_static, u2 signature_index, 1175 u2* const constantvalue_index_addr, 1176 bool* const is_synthetic_addr, 1177 u2* const generic_signature_index_addr, 1178 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1179 TRAPS) { 1180 assert(cfs != NULL, "invariant"); 1181 assert(constantvalue_index_addr != NULL, "invariant"); 1182 assert(is_synthetic_addr != NULL, "invariant"); 1183 assert(generic_signature_index_addr != NULL, "invariant"); 1184 assert(parsed_annotations != NULL, "invariant"); 1185 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1186 1187 u2 constantvalue_index = 0; 1188 u2 generic_signature_index = 0; 1189 bool is_synthetic = false; 1190 const u1* runtime_visible_annotations = NULL; 1191 int runtime_visible_annotations_length = 0; 1192 const u1* runtime_invisible_annotations = NULL; 1193 int runtime_invisible_annotations_length = 0; 1194 const u1* runtime_visible_type_annotations = NULL; 1195 int runtime_visible_type_annotations_length = 0; 1196 const u1* runtime_invisible_type_annotations = NULL; 1197 int runtime_invisible_type_annotations_length = 0; 1198 bool runtime_invisible_annotations_exists = false; 1199 bool runtime_invisible_type_annotations_exists = false; 1200 const ConstantPool* const cp = _cp; 1201 1202 while (attributes_count--) { 1203 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1204 const u2 attribute_name_index = cfs->get_u2_fast(); 1205 const u4 attribute_length = cfs->get_u4_fast(); 1206 check_property(valid_symbol_at(attribute_name_index), 1207 "Invalid field attribute index %u in class file %s", 1208 attribute_name_index, 1209 CHECK); 1210 1211 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1212 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1213 // ignore if non-static 1214 if (constantvalue_index != 0) { 1215 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1216 } 1217 check_property( 1218 attribute_length == 2, 1219 "Invalid ConstantValue field attribute length %u in class file %s", 1220 attribute_length, CHECK); 1221 1222 constantvalue_index = cfs->get_u2(CHECK); 1223 if (_need_verify) { 1224 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1225 } 1226 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1227 if (attribute_length != 0) { 1228 classfile_parse_error( 1229 "Invalid Synthetic field attribute length %u in class file %s", 1230 attribute_length, CHECK); 1231 } 1232 is_synthetic = true; 1233 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1234 if (attribute_length != 0) { 1235 classfile_parse_error( 1236 "Invalid Deprecated field attribute length %u in class file %s", 1237 attribute_length, CHECK); 1238 } 1239 } else if (_major_version >= JAVA_1_5_VERSION) { 1240 if (attribute_name == vmSymbols::tag_signature()) { 1241 if (attribute_length != 2) { 1242 classfile_parse_error( 1243 "Wrong size %u for field's Signature attribute in class file %s", 1244 attribute_length, CHECK); 1245 } 1246 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1247 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1248 if (runtime_visible_annotations != NULL) { 1249 classfile_parse_error( 1250 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1251 } 1252 runtime_visible_annotations_length = attribute_length; 1253 runtime_visible_annotations = cfs->get_u1_buffer(); 1254 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1255 parse_annotations(cp, 1256 runtime_visible_annotations, 1257 runtime_visible_annotations_length, 1258 parsed_annotations, 1259 _loader_data, 1260 CHECK); 1261 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 1262 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1263 if (runtime_invisible_annotations_exists) { 1264 classfile_parse_error( 1265 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1266 } 1267 runtime_invisible_annotations_exists = true; 1268 if (PreserveAllAnnotations) { 1269 runtime_invisible_annotations_length = attribute_length; 1270 runtime_invisible_annotations = cfs->get_u1_buffer(); 1271 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1272 } 1273 cfs->skip_u1(attribute_length, CHECK); 1274 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1275 if (runtime_visible_type_annotations != NULL) { 1276 classfile_parse_error( 1277 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1278 } 1279 runtime_visible_type_annotations_length = attribute_length; 1280 runtime_visible_type_annotations = cfs->get_u1_buffer(); 1281 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1282 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1283 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1284 if (runtime_invisible_type_annotations_exists) { 1285 classfile_parse_error( 1286 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1287 } else { 1288 runtime_invisible_type_annotations_exists = true; 1289 } 1290 if (PreserveAllAnnotations) { 1291 runtime_invisible_type_annotations_length = attribute_length; 1292 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 1293 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1294 } 1295 cfs->skip_u1(attribute_length, CHECK); 1296 } else { 1297 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1298 } 1299 } else { 1300 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1301 } 1302 } 1303 1304 *constantvalue_index_addr = constantvalue_index; 1305 *is_synthetic_addr = is_synthetic; 1306 *generic_signature_index_addr = generic_signature_index; 1307 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1308 runtime_visible_annotations_length, 1309 runtime_invisible_annotations, 1310 runtime_invisible_annotations_length, 1311 CHECK); 1312 parsed_annotations->set_field_annotations(a); 1313 a = assemble_annotations(runtime_visible_type_annotations, 1314 runtime_visible_type_annotations_length, 1315 runtime_invisible_type_annotations, 1316 runtime_invisible_type_annotations_length, 1317 CHECK); 1318 parsed_annotations->set_field_type_annotations(a); 1319 return; 1320 } 1321 1322 1323 // Field allocation types. Used for computing field offsets. 1324 1325 enum FieldAllocationType { 1326 STATIC_OOP, // Oops 1327 STATIC_BYTE, // Boolean, Byte, char 1328 STATIC_SHORT, // shorts 1329 STATIC_WORD, // ints 1330 STATIC_DOUBLE, // aligned long or double 1331 NONSTATIC_OOP, 1332 NONSTATIC_BYTE, 1333 NONSTATIC_SHORT, 1334 NONSTATIC_WORD, 1335 NONSTATIC_DOUBLE, 1336 MAX_FIELD_ALLOCATION_TYPE, 1337 BAD_ALLOCATION_TYPE = -1 1338 }; 1339 1340 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1341 BAD_ALLOCATION_TYPE, // 0 1342 BAD_ALLOCATION_TYPE, // 1 1343 BAD_ALLOCATION_TYPE, // 2 1344 BAD_ALLOCATION_TYPE, // 3 1345 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1346 NONSTATIC_SHORT, // T_CHAR = 5, 1347 NONSTATIC_WORD, // T_FLOAT = 6, 1348 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1349 NONSTATIC_BYTE, // T_BYTE = 8, 1350 NONSTATIC_SHORT, // T_SHORT = 9, 1351 NONSTATIC_WORD, // T_INT = 10, 1352 NONSTATIC_DOUBLE, // T_LONG = 11, 1353 NONSTATIC_OOP, // T_OBJECT = 12, 1354 NONSTATIC_OOP, // T_ARRAY = 13, 1355 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1356 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1357 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1358 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1359 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1360 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1361 BAD_ALLOCATION_TYPE, // 0 1362 BAD_ALLOCATION_TYPE, // 1 1363 BAD_ALLOCATION_TYPE, // 2 1364 BAD_ALLOCATION_TYPE, // 3 1365 STATIC_BYTE , // T_BOOLEAN = 4, 1366 STATIC_SHORT, // T_CHAR = 5, 1367 STATIC_WORD, // T_FLOAT = 6, 1368 STATIC_DOUBLE, // T_DOUBLE = 7, 1369 STATIC_BYTE, // T_BYTE = 8, 1370 STATIC_SHORT, // T_SHORT = 9, 1371 STATIC_WORD, // T_INT = 10, 1372 STATIC_DOUBLE, // T_LONG = 11, 1373 STATIC_OOP, // T_OBJECT = 12, 1374 STATIC_OOP, // T_ARRAY = 13, 1375 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1376 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1377 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1378 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1379 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1380 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1381 }; 1382 1383 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1384 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1385 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1386 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1387 return result; 1388 } 1389 1390 class ClassFileParser::FieldAllocationCount : public ResourceObj { 1391 public: 1392 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1393 1394 FieldAllocationCount() { 1395 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1396 count[i] = 0; 1397 } 1398 } 1399 1400 FieldAllocationType update(bool is_static, BasicType type) { 1401 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1402 // Make sure there is no overflow with injected fields. 1403 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1404 count[atype]++; 1405 return atype; 1406 } 1407 }; 1408 1409 // Side-effects: populates the _fields, _fields_annotations, 1410 // _fields_type_annotations fields 1411 void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1412 bool is_interface, 1413 FieldAllocationCount* const fac, 1414 ConstantPool* cp, 1415 const int cp_size, 1416 u2* const java_fields_count_ptr, 1417 TRAPS) { 1418 1419 assert(cfs != NULL, "invariant"); 1420 assert(fac != NULL, "invariant"); 1421 assert(cp != NULL, "invariant"); 1422 assert(java_fields_count_ptr != NULL, "invariant"); 1423 1424 assert(NULL == _fields, "invariant"); 1425 assert(NULL == _fields_annotations, "invariant"); 1426 assert(NULL == _fields_type_annotations, "invariant"); 1427 1428 cfs->guarantee_more(2, CHECK); // length 1429 const u2 length = cfs->get_u2_fast(); 1430 *java_fields_count_ptr = length; 1431 1432 int num_injected = 0; 1433 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1434 &num_injected); 1435 const int total_fields = length + num_injected; 1436 1437 // The field array starts with tuples of shorts 1438 // [access, name index, sig index, initial value index, byte offset]. 1439 // A generic signature slot only exists for field with generic 1440 // signature attribute. And the access flag is set with 1441 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1442 // signature slots are at the end of the field array and after all 1443 // other fields data. 1444 // 1445 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1446 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1447 // ... 1448 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1449 // [generic signature index] 1450 // [generic signature index] 1451 // ... 1452 // 1453 // Allocate a temporary resource array for field data. For each field, 1454 // a slot is reserved in the temporary array for the generic signature 1455 // index. After parsing all fields, the data are copied to a permanent 1456 // array and any unused slots will be discarded. 1457 ResourceMark rm(THREAD); 1458 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1459 u2, 1460 total_fields * (FieldInfo::field_slots + 1)); 1461 1462 // The generic signature slots start after all other fields' data. 1463 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1464 int num_generic_signature = 0; 1465 for (int n = 0; n < length; n++) { 1466 // access_flags, name_index, descriptor_index, attributes_count 1467 cfs->guarantee_more(8, CHECK); 1468 1469 AccessFlags access_flags; 1470 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1471 verify_legal_field_modifiers(flags, is_interface, CHECK); 1472 access_flags.set_flags(flags); 1473 1474 const u2 name_index = cfs->get_u2_fast(); 1475 check_property(valid_symbol_at(name_index), 1476 "Invalid constant pool index %u for field name in class file %s", 1477 name_index, CHECK); 1478 const Symbol* const name = cp->symbol_at(name_index); 1479 verify_legal_field_name(name, CHECK); 1480 1481 const u2 signature_index = cfs->get_u2_fast(); 1482 check_property(valid_symbol_at(signature_index), 1483 "Invalid constant pool index %u for field signature in class file %s", 1484 signature_index, CHECK); 1485 const Symbol* const sig = cp->symbol_at(signature_index); 1486 verify_legal_field_signature(name, sig, CHECK); 1487 1488 u2 constantvalue_index = 0; 1489 bool is_synthetic = false; 1490 u2 generic_signature_index = 0; 1491 const bool is_static = access_flags.is_static(); 1492 FieldAnnotationCollector parsed_annotations(_loader_data); 1493 1494 const u2 attributes_count = cfs->get_u2_fast(); 1495 if (attributes_count > 0) { 1496 parse_field_attributes(cfs, 1497 attributes_count, 1498 is_static, 1499 signature_index, 1500 &constantvalue_index, 1501 &is_synthetic, 1502 &generic_signature_index, 1503 &parsed_annotations, 1504 CHECK); 1505 1506 if (parsed_annotations.field_annotations() != NULL) { 1507 if (_fields_annotations == NULL) { 1508 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1509 _loader_data, length, NULL, 1510 CHECK); 1511 } 1512 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1513 parsed_annotations.set_field_annotations(NULL); 1514 } 1515 if (parsed_annotations.field_type_annotations() != NULL) { 1516 if (_fields_type_annotations == NULL) { 1517 _fields_type_annotations = 1518 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1519 length, 1520 NULL, 1521 CHECK); 1522 } 1523 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1524 parsed_annotations.set_field_type_annotations(NULL); 1525 } 1526 1527 if (is_synthetic) { 1528 access_flags.set_is_synthetic(); 1529 } 1530 if (generic_signature_index != 0) { 1531 access_flags.set_field_has_generic_signature(); 1532 fa[generic_signature_slot] = generic_signature_index; 1533 generic_signature_slot ++; 1534 num_generic_signature ++; 1535 } 1536 } 1537 1538 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1539 field->initialize(access_flags.as_short(), 1540 name_index, 1541 signature_index, 1542 constantvalue_index); 1543 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1544 1545 // Remember how many oops we encountered and compute allocation type 1546 const FieldAllocationType atype = fac->update(is_static, type); 1547 field->set_allocation_type(atype); 1548 1549 // After field is initialized with type, we can augment it with aux info 1550 if (parsed_annotations.has_any_annotations()) 1551 parsed_annotations.apply_to(field); 1552 } 1553 1554 int index = length; 1555 if (num_injected != 0) { 1556 for (int n = 0; n < num_injected; n++) { 1557 // Check for duplicates 1558 if (injected[n].may_be_java) { 1559 const Symbol* const name = injected[n].name(); 1560 const Symbol* const signature = injected[n].signature(); 1561 bool duplicate = false; 1562 for (int i = 0; i < length; i++) { 1563 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1564 if (name == cp->symbol_at(f->name_index()) && 1565 signature == cp->symbol_at(f->signature_index())) { 1566 // Symbol is desclared in Java so skip this one 1567 duplicate = true; 1568 break; 1569 } 1570 } 1571 if (duplicate) { 1572 // These will be removed from the field array at the end 1573 continue; 1574 } 1575 } 1576 1577 // Injected field 1578 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1579 field->initialize(JVM_ACC_FIELD_INTERNAL, 1580 injected[n].name_index, 1581 injected[n].signature_index, 1582 0); 1583 1584 const BasicType type = FieldType::basic_type(injected[n].signature()); 1585 1586 // Remember how many oops we encountered and compute allocation type 1587 const FieldAllocationType atype = fac->update(false, type); 1588 field->set_allocation_type(atype); 1589 index++; 1590 } 1591 } 1592 1593 assert(NULL == _fields, "invariant"); 1594 1595 _fields = 1596 MetadataFactory::new_array<u2>(_loader_data, 1597 index * FieldInfo::field_slots + num_generic_signature, 1598 CHECK); 1599 // Sometimes injected fields already exist in the Java source so 1600 // the fields array could be too long. In that case the 1601 // fields array is trimed. Also unused slots that were reserved 1602 // for generic signature indexes are discarded. 1603 { 1604 int i = 0; 1605 for (; i < index * FieldInfo::field_slots; i++) { 1606 _fields->at_put(i, fa[i]); 1607 } 1608 for (int j = total_fields * FieldInfo::field_slots; 1609 j < generic_signature_slot; j++) { 1610 _fields->at_put(i++, fa[j]); 1611 } 1612 assert(_fields->length() == i, ""); 1613 } 1614 1615 if (_need_verify && length > 1) { 1616 // Check duplicated fields 1617 ResourceMark rm(THREAD); 1618 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1619 THREAD, NameSigHash*, HASH_ROW_SIZE); 1620 initialize_hashtable(names_and_sigs); 1621 bool dup = false; 1622 { 1623 debug_only(NoSafepointVerifier nsv;) 1624 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1625 const Symbol* const name = fs.name(); 1626 const Symbol* const sig = fs.signature(); 1627 // If no duplicates, add name/signature in hashtable names_and_sigs. 1628 if (!put_after_lookup(name, sig, names_and_sigs)) { 1629 dup = true; 1630 break; 1631 } 1632 } 1633 } 1634 if (dup) { 1635 classfile_parse_error("Duplicate field name&signature in class file %s", 1636 CHECK); 1637 } 1638 } 1639 } 1640 1641 1642 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1643 while (length-- > 0) { 1644 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1645 } 1646 } 1647 1648 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1649 u4 code_length, 1650 u4 exception_table_length, 1651 TRAPS) { 1652 assert(cfs != NULL, "invariant"); 1653 1654 const u2* const exception_table_start = cfs->get_u2_buffer(); 1655 assert(exception_table_start != NULL, "null exception table"); 1656 1657 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1658 // end_pc, 1659 // handler_pc, 1660 // catch_type_index 1661 1662 // Will check legal target after parsing code array in verifier. 1663 if (_need_verify) { 1664 for (unsigned int i = 0; i < exception_table_length; i++) { 1665 const u2 start_pc = cfs->get_u2_fast(); 1666 const u2 end_pc = cfs->get_u2_fast(); 1667 const u2 handler_pc = cfs->get_u2_fast(); 1668 const u2 catch_type_index = cfs->get_u2_fast(); 1669 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1670 "Illegal exception table range in class file %s", 1671 CHECK_NULL); 1672 guarantee_property(handler_pc < code_length, 1673 "Illegal exception table handler in class file %s", 1674 CHECK_NULL); 1675 if (catch_type_index != 0) { 1676 guarantee_property(valid_klass_reference_at(catch_type_index), 1677 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1678 } 1679 } 1680 } else { 1681 cfs->skip_u2_fast(exception_table_length * 4); 1682 } 1683 return exception_table_start; 1684 } 1685 1686 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1687 u4 code_length, 1688 CompressedLineNumberWriteStream**const write_stream, 1689 TRAPS) { 1690 1691 const ClassFileStream* const cfs = _stream; 1692 unsigned int num_entries = cfs->get_u2(CHECK); 1693 1694 // Each entry is a u2 start_pc, and a u2 line_number 1695 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1696 1697 // Verify line number attribute and table length 1698 check_property( 1699 code_attribute_length == sizeof(u2) + length_in_bytes, 1700 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1701 1702 cfs->guarantee_more(length_in_bytes, CHECK); 1703 1704 if ((*write_stream) == NULL) { 1705 if (length_in_bytes > fixed_buffer_size) { 1706 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1707 } else { 1708 (*write_stream) = new CompressedLineNumberWriteStream( 1709 _linenumbertable_buffer, fixed_buffer_size); 1710 } 1711 } 1712 1713 while (num_entries-- > 0) { 1714 const u2 bci = cfs->get_u2_fast(); // start_pc 1715 const u2 line = cfs->get_u2_fast(); // line_number 1716 guarantee_property(bci < code_length, 1717 "Invalid pc in LineNumberTable in class file %s", CHECK); 1718 (*write_stream)->write_pair(bci, line); 1719 } 1720 } 1721 1722 1723 class LVT_Hash : public AllStatic { 1724 public: 1725 1726 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1727 /* 1728 * 3-tuple start_bci/length/slot has to be unique key, 1729 * so the following comparison seems to be redundant: 1730 * && elem->name_cp_index == entry->_elem->name_cp_index 1731 */ 1732 return (e0.start_bci == e1.start_bci && 1733 e0.length == e1.length && 1734 e0.name_cp_index == e1.name_cp_index && 1735 e0.slot == e1.slot); 1736 } 1737 1738 static unsigned int hash(LocalVariableTableElement const& e0) { 1739 unsigned int raw_hash = e0.start_bci; 1740 1741 raw_hash = e0.length + raw_hash * 37; 1742 raw_hash = e0.name_cp_index + raw_hash * 37; 1743 raw_hash = e0.slot + raw_hash * 37; 1744 1745 return raw_hash; 1746 } 1747 }; 1748 1749 1750 // Class file LocalVariableTable elements. 1751 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1752 public: 1753 u2 start_bci; 1754 u2 length; 1755 u2 name_cp_index; 1756 u2 descriptor_cp_index; 1757 u2 slot; 1758 }; 1759 1760 static void copy_lvt_element(const Classfile_LVT_Element* const src, 1761 LocalVariableTableElement* const lvt) { 1762 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1763 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1764 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1765 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1766 lvt->signature_cp_index = 0; 1767 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1768 } 1769 1770 // Function is used to parse both attributes: 1771 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1772 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1773 u4 code_length, 1774 u2 max_locals, 1775 u4 code_attribute_length, 1776 u2* const localvariable_table_length, 1777 bool isLVTT, 1778 TRAPS) { 1779 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1780 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1781 const unsigned int size = 1782 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1783 1784 const ConstantPool* const cp = _cp; 1785 1786 // Verify local variable table attribute has right length 1787 if (_need_verify) { 1788 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1789 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1790 } 1791 1792 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1793 assert(localvariable_table_start != NULL, "null local variable table"); 1794 if (!_need_verify) { 1795 cfs->skip_u2_fast(size); 1796 } else { 1797 cfs->guarantee_more(size * 2, CHECK_NULL); 1798 for(int i = 0; i < (*localvariable_table_length); i++) { 1799 const u2 start_pc = cfs->get_u2_fast(); 1800 const u2 length = cfs->get_u2_fast(); 1801 const u2 name_index = cfs->get_u2_fast(); 1802 const u2 descriptor_index = cfs->get_u2_fast(); 1803 const u2 index = cfs->get_u2_fast(); 1804 // Assign to a u4 to avoid overflow 1805 const u4 end_pc = (u4)start_pc + (u4)length; 1806 1807 if (start_pc >= code_length) { 1808 classfile_parse_error( 1809 "Invalid start_pc %u in %s in class file %s", 1810 start_pc, tbl_name, CHECK_NULL); 1811 } 1812 if (end_pc > code_length) { 1813 classfile_parse_error( 1814 "Invalid length %u in %s in class file %s", 1815 length, tbl_name, CHECK_NULL); 1816 } 1817 const int cp_size = cp->length(); 1818 guarantee_property(valid_symbol_at(name_index), 1819 "Name index %u in %s has bad constant type in class file %s", 1820 name_index, tbl_name, CHECK_NULL); 1821 guarantee_property(valid_symbol_at(descriptor_index), 1822 "Signature index %u in %s has bad constant type in class file %s", 1823 descriptor_index, tbl_name, CHECK_NULL); 1824 1825 const Symbol* const name = cp->symbol_at(name_index); 1826 const Symbol* const sig = cp->symbol_at(descriptor_index); 1827 verify_legal_field_name(name, CHECK_NULL); 1828 u2 extra_slot = 0; 1829 if (!isLVTT) { 1830 verify_legal_field_signature(name, sig, CHECK_NULL); 1831 1832 // 4894874: check special cases for double and long local variables 1833 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1834 sig == vmSymbols::type_signature(T_LONG)) { 1835 extra_slot = 1; 1836 } 1837 } 1838 guarantee_property((index + extra_slot) < max_locals, 1839 "Invalid index %u in %s in class file %s", 1840 index, tbl_name, CHECK_NULL); 1841 } 1842 } 1843 return localvariable_table_start; 1844 } 1845 1846 1847 void ClassFileParser::parse_type_array(u2 array_length, 1848 u4 code_length, 1849 u4* const u1_index, 1850 u4* const u2_index, 1851 u1* const u1_array, 1852 u2* const u2_array, 1853 TRAPS) { 1854 const ClassFileStream* const cfs = _stream; 1855 u2 index = 0; // index in the array with long/double occupying two slots 1856 u4 i1 = *u1_index; 1857 u4 i2 = *u2_index + 1; 1858 for(int i = 0; i < array_length; i++) { 1859 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1860 index++; 1861 if (tag == ITEM_Long || tag == ITEM_Double) { 1862 index++; 1863 } else if (tag == ITEM_Object) { 1864 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1865 guarantee_property(valid_klass_reference_at(class_index), 1866 "Bad class index %u in StackMap in class file %s", 1867 class_index, CHECK); 1868 } else if (tag == ITEM_Uninitialized) { 1869 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1870 guarantee_property( 1871 offset < code_length, 1872 "Bad uninitialized type offset %u in StackMap in class file %s", 1873 offset, CHECK); 1874 } else { 1875 guarantee_property( 1876 tag <= (u1)ITEM_Uninitialized, 1877 "Unknown variable type %u in StackMap in class file %s", 1878 tag, CHECK); 1879 } 1880 } 1881 u2_array[*u2_index] = index; 1882 *u1_index = i1; 1883 *u2_index = i2; 1884 } 1885 1886 static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1887 u4 code_attribute_length, 1888 bool need_verify, 1889 TRAPS) { 1890 assert(cfs != NULL, "invariant"); 1891 1892 if (0 == code_attribute_length) { 1893 return NULL; 1894 } 1895 1896 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1897 assert(stackmap_table_start != NULL, "null stackmap table"); 1898 1899 // check code_attribute_length first 1900 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1901 1902 if (!need_verify && !DumpSharedSpaces) { 1903 return NULL; 1904 } 1905 return stackmap_table_start; 1906 } 1907 1908 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1909 u2* const checked_exceptions_length, 1910 u4 method_attribute_length, 1911 TRAPS) { 1912 assert(cfs != NULL, "invariant"); 1913 assert(checked_exceptions_length != NULL, "invariant"); 1914 1915 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1916 *checked_exceptions_length = cfs->get_u2_fast(); 1917 const unsigned int size = 1918 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1919 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1920 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1921 if (!_need_verify) { 1922 cfs->skip_u2_fast(size); 1923 } else { 1924 // Verify each value in the checked exception table 1925 u2 checked_exception; 1926 const u2 len = *checked_exceptions_length; 1927 cfs->guarantee_more(2 * len, CHECK_NULL); 1928 for (int i = 0; i < len; i++) { 1929 checked_exception = cfs->get_u2_fast(); 1930 check_property( 1931 valid_klass_reference_at(checked_exception), 1932 "Exception name has bad type at constant pool %u in class file %s", 1933 checked_exception, CHECK_NULL); 1934 } 1935 } 1936 // check exceptions attribute length 1937 if (_need_verify) { 1938 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1939 sizeof(u2) * size), 1940 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1941 } 1942 return checked_exceptions_start; 1943 } 1944 1945 void ClassFileParser::throwIllegalSignature(const char* type, 1946 const Symbol* name, 1947 const Symbol* sig, 1948 TRAPS) const { 1949 assert(name != NULL, "invariant"); 1950 assert(sig != NULL, "invariant"); 1951 1952 ResourceMark rm(THREAD); 1953 Exceptions::fthrow(THREAD_AND_LOCATION, 1954 vmSymbols::java_lang_ClassFormatError(), 1955 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1956 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1957 } 1958 1959 AnnotationCollector::ID 1960 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 1961 const Symbol* name) { 1962 const vmSymbols::SID sid = vmSymbols::find_sid(name); 1963 // Privileged code can use all annotations. Other code silently drops some. 1964 const bool privileged = loader_data->is_the_null_class_loader_data() || 1965 loader_data->is_ext_class_loader_data() || 1966 loader_data->is_anonymous(); 1967 switch (sid) { 1968 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): { 1969 if (_location != _in_method) break; // only allow for methods 1970 if (!privileged) break; // only allow in privileged code 1971 return _method_CallerSensitive; 1972 } 1973 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 1974 if (_location != _in_method) break; // only allow for methods 1975 if (!privileged) break; // only allow in privileged code 1976 return _method_ForceInline; 1977 } 1978 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 1979 if (_location != _in_method) break; // only allow for methods 1980 if (!privileged) break; // only allow in privileged code 1981 return _method_DontInline; 1982 } 1983 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 1984 if (_location != _in_method) break; // only allow for methods 1985 if (!privileged) break; // only allow in privileged code 1986 return _method_InjectedProfile; 1987 } 1988 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 1989 if (_location != _in_method) break; // only allow for methods 1990 if (!privileged) break; // only allow in privileged code 1991 return _method_LambdaForm_Compiled; 1992 } 1993 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 1994 if (_location != _in_method) break; // only allow for methods 1995 if (!privileged) break; // only allow in privileged code 1996 return _method_LambdaForm_Hidden; 1997 } 1998 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 1999 if (_location != _in_method) break; // only allow for methods 2000 if (!privileged) break; // only allow in privileged code 2001 return _method_HotSpotIntrinsicCandidate; 2002 } 2003 #if INCLUDE_JVMCI 2004 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): { 2005 if (_location != _in_field) break; // only allow for fields 2006 if (!privileged) break; // only allow in privileged code 2007 return _field_Stable; 2008 } 2009 #endif 2010 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2011 if (_location != _in_field) break; // only allow for fields 2012 if (!privileged) break; // only allow in privileged code 2013 return _field_Stable; 2014 } 2015 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2016 if (_location != _in_field && _location != _in_class) { 2017 break; // only allow for fields and classes 2018 } 2019 if (!EnableContended || (RestrictContended && !privileged)) { 2020 break; // honor privileges 2021 } 2022 return _jdk_internal_vm_annotation_Contended; 2023 } 2024 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2025 if (_location != _in_method) break; // only allow for methods 2026 if (RestrictReservedStack && !privileged) break; // honor privileges 2027 return _jdk_internal_vm_annotation_ReservedStackAccess; 2028 } 2029 default: { 2030 break; 2031 } 2032 } 2033 return AnnotationCollector::_unknown; 2034 } 2035 2036 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2037 if (is_contended()) 2038 f->set_contended_group(contended_group()); 2039 if (is_stable()) 2040 f->set_stable(true); 2041 } 2042 2043 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2044 // If there's an error deallocate metadata for field annotations 2045 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2046 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2047 } 2048 2049 void MethodAnnotationCollector::apply_to(methodHandle m) { 2050 if (has_annotation(_method_CallerSensitive)) 2051 m->set_caller_sensitive(true); 2052 if (has_annotation(_method_ForceInline)) 2053 m->set_force_inline(true); 2054 if (has_annotation(_method_DontInline)) 2055 m->set_dont_inline(true); 2056 if (has_annotation(_method_InjectedProfile)) 2057 m->set_has_injected_profile(true); 2058 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2059 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2060 if (has_annotation(_method_LambdaForm_Hidden)) 2061 m->set_hidden(true); 2062 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2063 m->set_intrinsic_candidate(true); 2064 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2065 m->set_has_reserved_stack_access(true); 2066 } 2067 2068 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2069 assert(ik != NULL, "invariant"); 2070 ik->set_is_contended(is_contended()); 2071 } 2072 2073 #define MAX_ARGS_SIZE 255 2074 #define MAX_CODE_SIZE 65535 2075 #define INITIAL_MAX_LVT_NUMBER 256 2076 2077 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2078 * 2079 * Rules for LVT's and LVTT's are: 2080 * - There can be any number of LVT's and LVTT's. 2081 * - If there are n LVT's, it is the same as if there was just 2082 * one LVT containing all the entries from the n LVT's. 2083 * - There may be no more than one LVT entry per local variable. 2084 * Two LVT entries are 'equal' if these fields are the same: 2085 * start_pc, length, name, slot 2086 * - There may be no more than one LVTT entry per each LVT entry. 2087 * Each LVTT entry has to match some LVT entry. 2088 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2089 */ 2090 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2091 int lvt_cnt, 2092 u2* const localvariable_table_length, 2093 const u2**const localvariable_table_start, 2094 int lvtt_cnt, 2095 u2* const localvariable_type_table_length, 2096 const u2**const localvariable_type_table_start, 2097 TRAPS) { 2098 2099 ResourceMark rm(THREAD); 2100 2101 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2102 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2103 2104 LVT_HashTable* const table = new LVT_HashTable(); 2105 2106 // To fill LocalVariableTable in 2107 const Classfile_LVT_Element* cf_lvt; 2108 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2109 2110 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2111 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2112 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2113 copy_lvt_element(&cf_lvt[idx], lvt); 2114 // If no duplicates, add LVT elem in hashtable. 2115 if (table->put(*lvt, lvt) == false 2116 && _need_verify 2117 && _major_version >= JAVA_1_5_VERSION) { 2118 classfile_parse_error("Duplicated LocalVariableTable attribute " 2119 "entry for '%s' in class file %s", 2120 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2121 CHECK); 2122 } 2123 } 2124 } 2125 2126 // To merge LocalVariableTable and LocalVariableTypeTable 2127 const Classfile_LVT_Element* cf_lvtt; 2128 LocalVariableTableElement lvtt_elem; 2129 2130 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2131 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2132 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2133 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2134 LocalVariableTableElement** entry = table->get(lvtt_elem); 2135 if (entry == NULL) { 2136 if (_need_verify) { 2137 classfile_parse_error("LVTT entry for '%s' in class file %s " 2138 "does not match any LVT entry", 2139 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2140 CHECK); 2141 } 2142 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2143 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2144 "entry for '%s' in class file %s", 2145 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2146 CHECK); 2147 } else { 2148 // to add generic signatures into LocalVariableTable 2149 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2150 } 2151 } 2152 } 2153 } 2154 2155 2156 void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2157 const u1* runtime_visible_annotations, 2158 int runtime_visible_annotations_length, 2159 const u1* runtime_invisible_annotations, 2160 int runtime_invisible_annotations_length, 2161 const u1* runtime_visible_parameter_annotations, 2162 int runtime_visible_parameter_annotations_length, 2163 const u1* runtime_invisible_parameter_annotations, 2164 int runtime_invisible_parameter_annotations_length, 2165 const u1* runtime_visible_type_annotations, 2166 int runtime_visible_type_annotations_length, 2167 const u1* runtime_invisible_type_annotations, 2168 int runtime_invisible_type_annotations_length, 2169 const u1* annotation_default, 2170 int annotation_default_length, 2171 TRAPS) { 2172 2173 AnnotationArray* a; 2174 2175 if (runtime_visible_annotations_length + 2176 runtime_invisible_annotations_length > 0) { 2177 a = assemble_annotations(runtime_visible_annotations, 2178 runtime_visible_annotations_length, 2179 runtime_invisible_annotations, 2180 runtime_invisible_annotations_length, 2181 CHECK); 2182 cm->set_method_annotations(a); 2183 } 2184 2185 if (runtime_visible_parameter_annotations_length + 2186 runtime_invisible_parameter_annotations_length > 0) { 2187 a = assemble_annotations(runtime_visible_parameter_annotations, 2188 runtime_visible_parameter_annotations_length, 2189 runtime_invisible_parameter_annotations, 2190 runtime_invisible_parameter_annotations_length, 2191 CHECK); 2192 cm->set_parameter_annotations(a); 2193 } 2194 2195 if (annotation_default_length > 0) { 2196 a = assemble_annotations(annotation_default, 2197 annotation_default_length, 2198 NULL, 2199 0, 2200 CHECK); 2201 cm->set_default_annotations(a); 2202 } 2203 2204 if (runtime_visible_type_annotations_length + 2205 runtime_invisible_type_annotations_length > 0) { 2206 a = assemble_annotations(runtime_visible_type_annotations, 2207 runtime_visible_type_annotations_length, 2208 runtime_invisible_type_annotations, 2209 runtime_invisible_type_annotations_length, 2210 CHECK); 2211 cm->set_type_annotations(a); 2212 } 2213 } 2214 2215 2216 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2217 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2218 // Method* to save footprint, so we only know the size of the resulting Method* when the 2219 // entire method attribute is parsed. 2220 // 2221 // The promoted_flags parameter is used to pass relevant access_flags 2222 // from the method back up to the containing klass. These flag values 2223 // are added to klass's access_flags. 2224 2225 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2226 bool is_interface, 2227 const ConstantPool* cp, 2228 AccessFlags* const promoted_flags, 2229 TRAPS) { 2230 assert(cfs != NULL, "invariant"); 2231 assert(cp != NULL, "invariant"); 2232 assert(promoted_flags != NULL, "invariant"); 2233 2234 ResourceMark rm(THREAD); 2235 // Parse fixed parts: 2236 // access_flags, name_index, descriptor_index, attributes_count 2237 cfs->guarantee_more(8, CHECK_NULL); 2238 2239 int flags = cfs->get_u2_fast(); 2240 const u2 name_index = cfs->get_u2_fast(); 2241 const int cp_size = cp->length(); 2242 check_property( 2243 valid_symbol_at(name_index), 2244 "Illegal constant pool index %u for method name in class file %s", 2245 name_index, CHECK_NULL); 2246 const Symbol* const name = cp->symbol_at(name_index); 2247 verify_legal_method_name(name, CHECK_NULL); 2248 2249 const u2 signature_index = cfs->get_u2_fast(); 2250 guarantee_property( 2251 valid_symbol_at(signature_index), 2252 "Illegal constant pool index %u for method signature in class file %s", 2253 signature_index, CHECK_NULL); 2254 const Symbol* const signature = cp->symbol_at(signature_index); 2255 2256 if (name == vmSymbols::class_initializer_name()) { 2257 // We ignore the other access flags for a valid class initializer. 2258 // (JVM Spec 2nd ed., chapter 4.6) 2259 if (_major_version < 51) { // backward compatibility 2260 flags = JVM_ACC_STATIC; 2261 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2262 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2263 } else { 2264 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2265 } 2266 } else { 2267 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2268 } 2269 2270 if (name == vmSymbols::object_initializer_name() && is_interface) { 2271 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2272 } 2273 2274 int args_size = -1; // only used when _need_verify is true 2275 if (_need_verify) { 2276 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2277 verify_legal_method_signature(name, signature, CHECK_NULL); 2278 if (args_size > MAX_ARGS_SIZE) { 2279 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2280 } 2281 } 2282 2283 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2284 2285 // Default values for code and exceptions attribute elements 2286 u2 max_stack = 0; 2287 u2 max_locals = 0; 2288 u4 code_length = 0; 2289 const u1* code_start = 0; 2290 u2 exception_table_length = 0; 2291 const u2* exception_table_start = NULL; 2292 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2293 u2 checked_exceptions_length = 0; 2294 const u2* checked_exceptions_start = NULL; 2295 CompressedLineNumberWriteStream* linenumber_table = NULL; 2296 int linenumber_table_length = 0; 2297 int total_lvt_length = 0; 2298 u2 lvt_cnt = 0; 2299 u2 lvtt_cnt = 0; 2300 bool lvt_allocated = false; 2301 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2302 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2303 u2* localvariable_table_length = NULL; 2304 const u2** localvariable_table_start = NULL; 2305 u2* localvariable_type_table_length = NULL; 2306 const u2** localvariable_type_table_start = NULL; 2307 int method_parameters_length = -1; 2308 const u1* method_parameters_data = NULL; 2309 bool method_parameters_seen = false; 2310 bool parsed_code_attribute = false; 2311 bool parsed_checked_exceptions_attribute = false; 2312 bool parsed_stackmap_attribute = false; 2313 // stackmap attribute - JDK1.5 2314 const u1* stackmap_data = NULL; 2315 int stackmap_data_length = 0; 2316 u2 generic_signature_index = 0; 2317 MethodAnnotationCollector parsed_annotations; 2318 const u1* runtime_visible_annotations = NULL; 2319 int runtime_visible_annotations_length = 0; 2320 const u1* runtime_invisible_annotations = NULL; 2321 int runtime_invisible_annotations_length = 0; 2322 const u1* runtime_visible_parameter_annotations = NULL; 2323 int runtime_visible_parameter_annotations_length = 0; 2324 const u1* runtime_invisible_parameter_annotations = NULL; 2325 int runtime_invisible_parameter_annotations_length = 0; 2326 const u1* runtime_visible_type_annotations = NULL; 2327 int runtime_visible_type_annotations_length = 0; 2328 const u1* runtime_invisible_type_annotations = NULL; 2329 int runtime_invisible_type_annotations_length = 0; 2330 bool runtime_invisible_annotations_exists = false; 2331 bool runtime_invisible_type_annotations_exists = false; 2332 bool runtime_invisible_parameter_annotations_exists = false; 2333 const u1* annotation_default = NULL; 2334 int annotation_default_length = 0; 2335 2336 // Parse code and exceptions attribute 2337 u2 method_attributes_count = cfs->get_u2_fast(); 2338 while (method_attributes_count--) { 2339 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2340 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2341 const u4 method_attribute_length = cfs->get_u4_fast(); 2342 check_property( 2343 valid_symbol_at(method_attribute_name_index), 2344 "Invalid method attribute name index %u in class file %s", 2345 method_attribute_name_index, CHECK_NULL); 2346 2347 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2348 if (method_attribute_name == vmSymbols::tag_code()) { 2349 // Parse Code attribute 2350 if (_need_verify) { 2351 guarantee_property( 2352 !access_flags.is_native() && !access_flags.is_abstract(), 2353 "Code attribute in native or abstract methods in class file %s", 2354 CHECK_NULL); 2355 } 2356 if (parsed_code_attribute) { 2357 classfile_parse_error("Multiple Code attributes in class file %s", 2358 CHECK_NULL); 2359 } 2360 parsed_code_attribute = true; 2361 2362 // Stack size, locals size, and code size 2363 if (_major_version == 45 && _minor_version <= 2) { 2364 cfs->guarantee_more(4, CHECK_NULL); 2365 max_stack = cfs->get_u1_fast(); 2366 max_locals = cfs->get_u1_fast(); 2367 code_length = cfs->get_u2_fast(); 2368 } else { 2369 cfs->guarantee_more(8, CHECK_NULL); 2370 max_stack = cfs->get_u2_fast(); 2371 max_locals = cfs->get_u2_fast(); 2372 code_length = cfs->get_u4_fast(); 2373 } 2374 if (_need_verify) { 2375 guarantee_property(args_size <= max_locals, 2376 "Arguments can't fit into locals in class file %s", 2377 CHECK_NULL); 2378 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2379 "Invalid method Code length %u in class file %s", 2380 code_length, CHECK_NULL); 2381 } 2382 // Code pointer 2383 code_start = cfs->get_u1_buffer(); 2384 assert(code_start != NULL, "null code start"); 2385 cfs->guarantee_more(code_length, CHECK_NULL); 2386 cfs->skip_u1_fast(code_length); 2387 2388 // Exception handler table 2389 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2390 exception_table_length = cfs->get_u2_fast(); 2391 if (exception_table_length > 0) { 2392 exception_table_start = parse_exception_table(cfs, 2393 code_length, 2394 exception_table_length, 2395 CHECK_NULL); 2396 } 2397 2398 // Parse additional attributes in code attribute 2399 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2400 u2 code_attributes_count = cfs->get_u2_fast(); 2401 2402 unsigned int calculated_attribute_length = 0; 2403 2404 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2405 calculated_attribute_length = 2406 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2407 } else { 2408 // max_stack, locals and length are smaller in pre-version 45.2 classes 2409 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2410 } 2411 calculated_attribute_length += 2412 code_length + 2413 sizeof(exception_table_length) + 2414 sizeof(code_attributes_count) + 2415 exception_table_length * 2416 ( sizeof(u2) + // start_pc 2417 sizeof(u2) + // end_pc 2418 sizeof(u2) + // handler_pc 2419 sizeof(u2) ); // catch_type_index 2420 2421 while (code_attributes_count--) { 2422 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2423 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2424 const u4 code_attribute_length = cfs->get_u4_fast(); 2425 calculated_attribute_length += code_attribute_length + 2426 sizeof(code_attribute_name_index) + 2427 sizeof(code_attribute_length); 2428 check_property(valid_symbol_at(code_attribute_name_index), 2429 "Invalid code attribute name index %u in class file %s", 2430 code_attribute_name_index, 2431 CHECK_NULL); 2432 if (LoadLineNumberTables && 2433 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2434 // Parse and compress line number table 2435 parse_linenumber_table(code_attribute_length, 2436 code_length, 2437 &linenumber_table, 2438 CHECK_NULL); 2439 2440 } else if (LoadLocalVariableTables && 2441 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2442 // Parse local variable table 2443 if (!lvt_allocated) { 2444 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2445 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2446 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2447 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2448 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2449 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2450 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2451 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2452 lvt_allocated = true; 2453 } 2454 if (lvt_cnt == max_lvt_cnt) { 2455 max_lvt_cnt <<= 1; 2456 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2457 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2458 } 2459 localvariable_table_start[lvt_cnt] = 2460 parse_localvariable_table(cfs, 2461 code_length, 2462 max_locals, 2463 code_attribute_length, 2464 &localvariable_table_length[lvt_cnt], 2465 false, // is not LVTT 2466 CHECK_NULL); 2467 total_lvt_length += localvariable_table_length[lvt_cnt]; 2468 lvt_cnt++; 2469 } else if (LoadLocalVariableTypeTables && 2470 _major_version >= JAVA_1_5_VERSION && 2471 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2472 if (!lvt_allocated) { 2473 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2474 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2475 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2476 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2477 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2478 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2479 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2480 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2481 lvt_allocated = true; 2482 } 2483 // Parse local variable type table 2484 if (lvtt_cnt == max_lvtt_cnt) { 2485 max_lvtt_cnt <<= 1; 2486 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2487 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2488 } 2489 localvariable_type_table_start[lvtt_cnt] = 2490 parse_localvariable_table(cfs, 2491 code_length, 2492 max_locals, 2493 code_attribute_length, 2494 &localvariable_type_table_length[lvtt_cnt], 2495 true, // is LVTT 2496 CHECK_NULL); 2497 lvtt_cnt++; 2498 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2499 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2500 // Stack map is only needed by the new verifier in JDK1.5. 2501 if (parsed_stackmap_attribute) { 2502 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2503 } 2504 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2505 stackmap_data_length = code_attribute_length; 2506 parsed_stackmap_attribute = true; 2507 } else { 2508 // Skip unknown attributes 2509 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2510 } 2511 } 2512 // check method attribute length 2513 if (_need_verify) { 2514 guarantee_property(method_attribute_length == calculated_attribute_length, 2515 "Code segment has wrong length in class file %s", 2516 CHECK_NULL); 2517 } 2518 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2519 // Parse Exceptions attribute 2520 if (parsed_checked_exceptions_attribute) { 2521 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2522 CHECK_NULL); 2523 } 2524 parsed_checked_exceptions_attribute = true; 2525 checked_exceptions_start = 2526 parse_checked_exceptions(cfs, 2527 &checked_exceptions_length, 2528 method_attribute_length, 2529 CHECK_NULL); 2530 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2531 // reject multiple method parameters 2532 if (method_parameters_seen) { 2533 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2534 CHECK_NULL); 2535 } 2536 method_parameters_seen = true; 2537 method_parameters_length = cfs->get_u1_fast(); 2538 const u2 real_length = (method_parameters_length * 4u) + 1u; 2539 if (method_attribute_length != real_length) { 2540 classfile_parse_error( 2541 "Invalid MethodParameters method attribute length %u in class file", 2542 method_attribute_length, CHECK_NULL); 2543 } 2544 method_parameters_data = cfs->get_u1_buffer(); 2545 cfs->skip_u2_fast(method_parameters_length); 2546 cfs->skip_u2_fast(method_parameters_length); 2547 // ignore this attribute if it cannot be reflected 2548 if (!SystemDictionary::Parameter_klass_loaded()) 2549 method_parameters_length = -1; 2550 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2551 if (method_attribute_length != 0) { 2552 classfile_parse_error( 2553 "Invalid Synthetic method attribute length %u in class file %s", 2554 method_attribute_length, CHECK_NULL); 2555 } 2556 // Should we check that there hasn't already been a synthetic attribute? 2557 access_flags.set_is_synthetic(); 2558 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2559 if (method_attribute_length != 0) { 2560 classfile_parse_error( 2561 "Invalid Deprecated method attribute length %u in class file %s", 2562 method_attribute_length, CHECK_NULL); 2563 } 2564 } else if (_major_version >= JAVA_1_5_VERSION) { 2565 if (method_attribute_name == vmSymbols::tag_signature()) { 2566 if (method_attribute_length != 2) { 2567 classfile_parse_error( 2568 "Invalid Signature attribute length %u in class file %s", 2569 method_attribute_length, CHECK_NULL); 2570 } 2571 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2572 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2573 if (runtime_visible_annotations != NULL) { 2574 classfile_parse_error( 2575 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2576 CHECK_NULL); 2577 } 2578 runtime_visible_annotations_length = method_attribute_length; 2579 runtime_visible_annotations = cfs->get_u1_buffer(); 2580 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2581 parse_annotations(cp, 2582 runtime_visible_annotations, 2583 runtime_visible_annotations_length, 2584 &parsed_annotations, 2585 _loader_data, 2586 CHECK_NULL); 2587 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL); 2588 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2589 if (runtime_invisible_annotations_exists) { 2590 classfile_parse_error( 2591 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2592 CHECK_NULL); 2593 } 2594 runtime_invisible_annotations_exists = true; 2595 if (PreserveAllAnnotations) { 2596 runtime_invisible_annotations_length = method_attribute_length; 2597 runtime_invisible_annotations = cfs->get_u1_buffer(); 2598 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2599 } 2600 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2601 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2602 if (runtime_visible_parameter_annotations != NULL) { 2603 classfile_parse_error( 2604 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2605 CHECK_NULL); 2606 } 2607 runtime_visible_parameter_annotations_length = method_attribute_length; 2608 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2609 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2610 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2611 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2612 if (runtime_invisible_parameter_annotations_exists) { 2613 classfile_parse_error( 2614 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2615 CHECK_NULL); 2616 } 2617 runtime_invisible_parameter_annotations_exists = true; 2618 if (PreserveAllAnnotations) { 2619 runtime_invisible_parameter_annotations_length = method_attribute_length; 2620 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2621 assert(runtime_invisible_parameter_annotations != NULL, 2622 "null invisible parameter annotations"); 2623 } 2624 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2625 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2626 if (annotation_default != NULL) { 2627 classfile_parse_error( 2628 "Multiple AnnotationDefault attributes for method in class file %s", 2629 CHECK_NULL); 2630 } 2631 annotation_default_length = method_attribute_length; 2632 annotation_default = cfs->get_u1_buffer(); 2633 assert(annotation_default != NULL, "null annotation default"); 2634 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2635 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2636 if (runtime_visible_type_annotations != NULL) { 2637 classfile_parse_error( 2638 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2639 CHECK_NULL); 2640 } 2641 runtime_visible_type_annotations_length = method_attribute_length; 2642 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2643 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2644 // No need for the VM to parse Type annotations 2645 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2646 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2647 if (runtime_invisible_type_annotations_exists) { 2648 classfile_parse_error( 2649 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2650 CHECK_NULL); 2651 } else { 2652 runtime_invisible_type_annotations_exists = true; 2653 } 2654 if (PreserveAllAnnotations) { 2655 runtime_invisible_type_annotations_length = method_attribute_length; 2656 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2657 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2658 } 2659 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2660 } else { 2661 // Skip unknown attributes 2662 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2663 } 2664 } else { 2665 // Skip unknown attributes 2666 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2667 } 2668 } 2669 2670 if (linenumber_table != NULL) { 2671 linenumber_table->write_terminator(); 2672 linenumber_table_length = linenumber_table->position(); 2673 } 2674 2675 // Make sure there's at least one Code attribute in non-native/non-abstract method 2676 if (_need_verify) { 2677 guarantee_property(access_flags.is_native() || 2678 access_flags.is_abstract() || 2679 parsed_code_attribute, 2680 "Absent Code attribute in method that is not native or abstract in class file %s", 2681 CHECK_NULL); 2682 } 2683 2684 // All sizing information for a Method* is finally available, now create it 2685 InlineTableSizes sizes( 2686 total_lvt_length, 2687 linenumber_table_length, 2688 exception_table_length, 2689 checked_exceptions_length, 2690 method_parameters_length, 2691 generic_signature_index, 2692 runtime_visible_annotations_length + 2693 runtime_invisible_annotations_length, 2694 runtime_visible_parameter_annotations_length + 2695 runtime_invisible_parameter_annotations_length, 2696 runtime_visible_type_annotations_length + 2697 runtime_invisible_type_annotations_length, 2698 annotation_default_length, 2699 0); 2700 2701 Method* const m = Method::allocate(_loader_data, 2702 code_length, 2703 access_flags, 2704 &sizes, 2705 ConstMethod::NORMAL, 2706 CHECK_NULL); 2707 2708 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2709 2710 // Fill in information from fixed part (access_flags already set) 2711 m->set_constants(_cp); 2712 m->set_name_index(name_index); 2713 m->set_signature_index(signature_index); 2714 #ifdef CC_INTERP 2715 // hmm is there a gc issue here?? 2716 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2717 m->set_result_index(rtf.type()); 2718 #endif 2719 2720 if (args_size >= 0) { 2721 m->set_size_of_parameters(args_size); 2722 } else { 2723 m->compute_size_of_parameters(THREAD); 2724 } 2725 #ifdef ASSERT 2726 if (args_size >= 0) { 2727 m->compute_size_of_parameters(THREAD); 2728 assert(args_size == m->size_of_parameters(), ""); 2729 } 2730 #endif 2731 2732 // Fill in code attribute information 2733 m->set_max_stack(max_stack); 2734 m->set_max_locals(max_locals); 2735 if (stackmap_data != NULL) { 2736 m->constMethod()->copy_stackmap_data(_loader_data, 2737 (u1*)stackmap_data, 2738 stackmap_data_length, 2739 CHECK_NULL); 2740 } 2741 2742 // Copy byte codes 2743 m->set_code((u1*)code_start); 2744 2745 // Copy line number table 2746 if (linenumber_table != NULL) { 2747 memcpy(m->compressed_linenumber_table(), 2748 linenumber_table->buffer(), 2749 linenumber_table_length); 2750 } 2751 2752 // Copy exception table 2753 if (exception_table_length > 0) { 2754 int size = 2755 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); 2756 copy_u2_with_conversion((u2*) m->exception_table_start(), 2757 exception_table_start, size); 2758 } 2759 2760 // Copy method parameters 2761 if (method_parameters_length > 0) { 2762 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2763 for (int i = 0; i < method_parameters_length; i++) { 2764 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2765 method_parameters_data += 2; 2766 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2767 method_parameters_data += 2; 2768 } 2769 } 2770 2771 // Copy checked exceptions 2772 if (checked_exceptions_length > 0) { 2773 const int size = 2774 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2775 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), 2776 checked_exceptions_start, 2777 size); 2778 } 2779 2780 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2781 if (total_lvt_length > 0) { 2782 promoted_flags->set_has_localvariable_table(); 2783 copy_localvariable_table(m->constMethod(), 2784 lvt_cnt, 2785 localvariable_table_length, 2786 localvariable_table_start, 2787 lvtt_cnt, 2788 localvariable_type_table_length, 2789 localvariable_type_table_start, 2790 CHECK_NULL); 2791 } 2792 2793 if (parsed_annotations.has_any_annotations()) 2794 parsed_annotations.apply_to(m); 2795 2796 // Copy annotations 2797 copy_method_annotations(m->constMethod(), 2798 runtime_visible_annotations, 2799 runtime_visible_annotations_length, 2800 runtime_invisible_annotations, 2801 runtime_invisible_annotations_length, 2802 runtime_visible_parameter_annotations, 2803 runtime_visible_parameter_annotations_length, 2804 runtime_invisible_parameter_annotations, 2805 runtime_invisible_parameter_annotations_length, 2806 runtime_visible_type_annotations, 2807 runtime_visible_type_annotations_length, 2808 runtime_invisible_type_annotations, 2809 runtime_invisible_type_annotations_length, 2810 annotation_default, 2811 annotation_default_length, 2812 CHECK_NULL); 2813 2814 if (name == vmSymbols::finalize_method_name() && 2815 signature == vmSymbols::void_method_signature()) { 2816 if (m->is_empty_method()) { 2817 _has_empty_finalizer = true; 2818 } else { 2819 _has_finalizer = true; 2820 } 2821 } 2822 if (name == vmSymbols::object_initializer_name() && 2823 signature == vmSymbols::void_method_signature() && 2824 m->is_vanilla_constructor()) { 2825 _has_vanilla_constructor = true; 2826 } 2827 2828 NOT_PRODUCT(m->verify()); 2829 return m; 2830 } 2831 2832 2833 // The promoted_flags parameter is used to pass relevant access_flags 2834 // from the methods back up to the containing klass. These flag values 2835 // are added to klass's access_flags. 2836 // Side-effects: populates the _methods field in the parser 2837 void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2838 bool is_interface, 2839 AccessFlags* promoted_flags, 2840 bool* has_final_method, 2841 bool* declares_default_methods, 2842 TRAPS) { 2843 assert(cfs != NULL, "invariant"); 2844 assert(promoted_flags != NULL, "invariant"); 2845 assert(has_final_method != NULL, "invariant"); 2846 assert(declares_default_methods != NULL, "invariant"); 2847 2848 assert(NULL == _methods, "invariant"); 2849 2850 cfs->guarantee_more(2, CHECK); // length 2851 const u2 length = cfs->get_u2_fast(); 2852 if (length == 0) { 2853 _methods = Universe::the_empty_method_array(); 2854 } else { 2855 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2856 length, 2857 NULL, 2858 CHECK); 2859 2860 HandleMark hm(THREAD); 2861 for (int index = 0; index < length; index++) { 2862 Method* method = parse_method(cfs, 2863 is_interface, 2864 _cp, 2865 promoted_flags, 2866 CHECK); 2867 2868 if (method->is_final()) { 2869 *has_final_method = true; 2870 } 2871 // declares_default_methods: declares concrete instance methods, any access flags 2872 // used for interface initialization, and default method inheritance analysis 2873 if (is_interface && !(*declares_default_methods) 2874 && !method->is_abstract() && !method->is_static()) { 2875 *declares_default_methods = true; 2876 } 2877 _methods->at_put(index, method); 2878 } 2879 2880 if (_need_verify && length > 1) { 2881 // Check duplicated methods 2882 ResourceMark rm(THREAD); 2883 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2884 THREAD, NameSigHash*, HASH_ROW_SIZE); 2885 initialize_hashtable(names_and_sigs); 2886 bool dup = false; 2887 { 2888 debug_only(NoSafepointVerifier nsv;) 2889 for (int i = 0; i < length; i++) { 2890 const Method* const m = _methods->at(i); 2891 // If no duplicates, add name/signature in hashtable names_and_sigs. 2892 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { 2893 dup = true; 2894 break; 2895 } 2896 } 2897 } 2898 if (dup) { 2899 classfile_parse_error("Duplicate method name&signature in class file %s", 2900 CHECK); 2901 } 2902 } 2903 } 2904 } 2905 2906 static const intArray* sort_methods(Array<Method*>* methods) { 2907 const int length = methods->length(); 2908 // If JVMTI original method ordering or sharing is enabled we have to 2909 // remember the original class file ordering. 2910 // We temporarily use the vtable_index field in the Method* to store the 2911 // class file index, so we can read in after calling qsort. 2912 // Put the method ordering in the shared archive. 2913 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2914 for (int index = 0; index < length; index++) { 2915 Method* const m = methods->at(index); 2916 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2917 m->set_vtable_index(index); 2918 } 2919 } 2920 // Sort method array by ascending method name (for faster lookups & vtable construction) 2921 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2922 Method::sort_methods(methods); 2923 2924 intArray* method_ordering = NULL; 2925 // If JVMTI original method ordering or sharing is enabled construct int 2926 // array remembering the original ordering 2927 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2928 method_ordering = new intArray(length); 2929 for (int index = 0; index < length; index++) { 2930 Method* const m = methods->at(index); 2931 const int old_index = m->vtable_index(); 2932 assert(old_index >= 0 && old_index < length, "invalid method index"); 2933 method_ordering->at_put(index, old_index); 2934 m->set_vtable_index(Method::invalid_vtable_index); 2935 } 2936 } 2937 return method_ordering; 2938 } 2939 2940 // Parse generic_signature attribute for methods and fields 2941 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 2942 TRAPS) { 2943 assert(cfs != NULL, "invariant"); 2944 2945 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 2946 const u2 generic_signature_index = cfs->get_u2_fast(); 2947 check_property( 2948 valid_symbol_at(generic_signature_index), 2949 "Invalid Signature attribute at constant pool index %u in class file %s", 2950 generic_signature_index, CHECK_0); 2951 return generic_signature_index; 2952 } 2953 2954 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 2955 TRAPS) { 2956 2957 assert(cfs != NULL, "invariant"); 2958 2959 cfs->guarantee_more(2, CHECK); // sourcefile_index 2960 const u2 sourcefile_index = cfs->get_u2_fast(); 2961 check_property( 2962 valid_symbol_at(sourcefile_index), 2963 "Invalid SourceFile attribute at constant pool index %u in class file %s", 2964 sourcefile_index, CHECK); 2965 set_class_sourcefile_index(sourcefile_index); 2966 } 2967 2968 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 2969 int length, 2970 TRAPS) { 2971 assert(cfs != NULL, "invariant"); 2972 2973 const u1* const sde_buffer = cfs->get_u1_buffer(); 2974 assert(sde_buffer != NULL, "null sde buffer"); 2975 2976 // Don't bother storing it if there is no way to retrieve it 2977 if (JvmtiExport::can_get_source_debug_extension()) { 2978 assert((length+1) > length, "Overflow checking"); 2979 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 2980 for (int i = 0; i < length; i++) { 2981 sde[i] = sde_buffer[i]; 2982 } 2983 sde[length] = '\0'; 2984 set_class_sde_buffer((const char*)sde, length); 2985 } 2986 // Got utf8 string, set stream position forward 2987 cfs->skip_u1(length, CHECK); 2988 } 2989 2990 2991 // Inner classes can be static, private or protected (classic VM does this) 2992 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 2993 JVM_ACC_PRIVATE | \ 2994 JVM_ACC_PROTECTED | \ 2995 JVM_ACC_STATIC \ 2996 ) 2997 2998 // Return number of classes in the inner classes attribute table 2999 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 3000 const u1* const inner_classes_attribute_start, 3001 bool parsed_enclosingmethod_attribute, 3002 u2 enclosing_method_class_index, 3003 u2 enclosing_method_method_index, 3004 TRAPS) { 3005 const u1* const current_mark = cfs->current(); 3006 u2 length = 0; 3007 if (inner_classes_attribute_start != NULL) { 3008 cfs->set_current(inner_classes_attribute_start); 3009 cfs->guarantee_more(2, CHECK_0); // length 3010 length = cfs->get_u2_fast(); 3011 } 3012 3013 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3014 // method data: 3015 // [inner_class_info_index, 3016 // outer_class_info_index, 3017 // inner_name_index, 3018 // inner_class_access_flags, 3019 // ... 3020 // enclosing_method_class_index, 3021 // enclosing_method_method_index] 3022 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3023 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3024 _inner_classes = inner_classes; 3025 3026 int index = 0; 3027 const int cp_size = _cp->length(); 3028 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3029 for (int n = 0; n < length; n++) { 3030 // Inner class index 3031 const u2 inner_class_info_index = cfs->get_u2_fast(); 3032 check_property( 3033 valid_klass_reference_at(inner_class_info_index), 3034 "inner_class_info_index %u has bad constant type in class file %s", 3035 inner_class_info_index, CHECK_0); 3036 // Outer class index 3037 const u2 outer_class_info_index = cfs->get_u2_fast(); 3038 check_property( 3039 outer_class_info_index == 0 || 3040 valid_klass_reference_at(outer_class_info_index), 3041 "outer_class_info_index %u has bad constant type in class file %s", 3042 outer_class_info_index, CHECK_0); 3043 // Inner class name 3044 const u2 inner_name_index = cfs->get_u2_fast(); 3045 check_property( 3046 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3047 "inner_name_index %u has bad constant type in class file %s", 3048 inner_name_index, CHECK_0); 3049 if (_need_verify) { 3050 guarantee_property(inner_class_info_index != outer_class_info_index, 3051 "Class is both outer and inner class in class file %s", CHECK_0); 3052 } 3053 // Access flags 3054 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3055 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3056 // Set abstract bit for old class files for backward compatibility 3057 flags |= JVM_ACC_ABSTRACT; 3058 } 3059 verify_legal_class_modifiers(flags, CHECK_0); 3060 AccessFlags inner_access_flags(flags); 3061 3062 inner_classes->at_put(index++, inner_class_info_index); 3063 inner_classes->at_put(index++, outer_class_info_index); 3064 inner_classes->at_put(index++, inner_name_index); 3065 inner_classes->at_put(index++, inner_access_flags.as_short()); 3066 } 3067 3068 // 4347400: make sure there's no duplicate entry in the classes array 3069 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3070 for(int i = 0; i < length * 4; i += 4) { 3071 for(int j = i + 4; j < length * 4; j += 4) { 3072 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3073 inner_classes->at(i+1) != inner_classes->at(j+1) || 3074 inner_classes->at(i+2) != inner_classes->at(j+2) || 3075 inner_classes->at(i+3) != inner_classes->at(j+3)), 3076 "Duplicate entry in InnerClasses in class file %s", 3077 CHECK_0); 3078 } 3079 } 3080 } 3081 3082 // Set EnclosingMethod class and method indexes. 3083 if (parsed_enclosingmethod_attribute) { 3084 inner_classes->at_put(index++, enclosing_method_class_index); 3085 inner_classes->at_put(index++, enclosing_method_method_index); 3086 } 3087 assert(index == size, "wrong size"); 3088 3089 // Restore buffer's current position. 3090 cfs->set_current(current_mark); 3091 3092 return length; 3093 } 3094 3095 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3096 set_class_synthetic_flag(true); 3097 } 3098 3099 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3100 assert(cfs != NULL, "invariant"); 3101 3102 const u2 signature_index = cfs->get_u2(CHECK); 3103 check_property( 3104 valid_symbol_at(signature_index), 3105 "Invalid constant pool index %u in Signature attribute in class file %s", 3106 signature_index, CHECK); 3107 set_class_generic_signature_index(signature_index); 3108 } 3109 3110 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3111 ConstantPool* cp, 3112 u4 attribute_byte_length, 3113 TRAPS) { 3114 assert(cfs != NULL, "invariant"); 3115 assert(cp != NULL, "invariant"); 3116 3117 const u1* const current_start = cfs->current(); 3118 3119 guarantee_property(attribute_byte_length >= sizeof(u2), 3120 "Invalid BootstrapMethods attribute length %u in class file %s", 3121 attribute_byte_length, 3122 CHECK); 3123 3124 cfs->guarantee_more(attribute_byte_length, CHECK); 3125 3126 const int attribute_array_length = cfs->get_u2_fast(); 3127 3128 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3129 "Short length on BootstrapMethods in class file %s", 3130 CHECK); 3131 3132 3133 // The attribute contains a counted array of counted tuples of shorts, 3134 // represending bootstrap specifiers: 3135 // length*{bootstrap_method_index, argument_count*{argument_index}} 3136 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3137 // operand_count = number of shorts in attr, except for leading length 3138 3139 // The attribute is copied into a short[] array. 3140 // The array begins with a series of short[2] pairs, one for each tuple. 3141 const int index_size = (attribute_array_length * 2); 3142 3143 Array<u2>* const operands = 3144 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3145 3146 // Eagerly assign operands so they will be deallocated with the constant 3147 // pool if there is an error. 3148 cp->set_operands(operands); 3149 3150 int operand_fill_index = index_size; 3151 const int cp_size = cp->length(); 3152 3153 for (int n = 0; n < attribute_array_length; n++) { 3154 // Store a 32-bit offset into the header of the operand array. 3155 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3156 3157 // Read a bootstrap specifier. 3158 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3159 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3160 const u2 argument_count = cfs->get_u2_fast(); 3161 check_property( 3162 valid_cp_range(bootstrap_method_index, cp_size) && 3163 cp->tag_at(bootstrap_method_index).is_method_handle(), 3164 "bootstrap_method_index %u has bad constant type in class file %s", 3165 bootstrap_method_index, 3166 CHECK); 3167 3168 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3169 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3170 CHECK); 3171 3172 operands->at_put(operand_fill_index++, bootstrap_method_index); 3173 operands->at_put(operand_fill_index++, argument_count); 3174 3175 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3176 for (int j = 0; j < argument_count; j++) { 3177 const u2 argument_index = cfs->get_u2_fast(); 3178 check_property( 3179 valid_cp_range(argument_index, cp_size) && 3180 cp->tag_at(argument_index).is_loadable_constant(), 3181 "argument_index %u has bad constant type in class file %s", 3182 argument_index, 3183 CHECK); 3184 operands->at_put(operand_fill_index++, argument_index); 3185 } 3186 } 3187 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3188 "Bad length on BootstrapMethods in class file %s", 3189 CHECK); 3190 } 3191 3192 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3193 ConstantPool* cp, 3194 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3195 TRAPS) { 3196 assert(cfs != NULL, "invariant"); 3197 assert(cp != NULL, "invariant"); 3198 assert(parsed_annotations != NULL, "invariant"); 3199 3200 // Set inner classes attribute to default sentinel 3201 _inner_classes = Universe::the_empty_short_array(); 3202 cfs->guarantee_more(2, CHECK); // attributes_count 3203 u2 attributes_count = cfs->get_u2_fast(); 3204 bool parsed_sourcefile_attribute = false; 3205 bool parsed_innerclasses_attribute = false; 3206 bool parsed_enclosingmethod_attribute = false; 3207 bool parsed_bootstrap_methods_attribute = false; 3208 const u1* runtime_visible_annotations = NULL; 3209 int runtime_visible_annotations_length = 0; 3210 const u1* runtime_invisible_annotations = NULL; 3211 int runtime_invisible_annotations_length = 0; 3212 const u1* runtime_visible_type_annotations = NULL; 3213 int runtime_visible_type_annotations_length = 0; 3214 const u1* runtime_invisible_type_annotations = NULL; 3215 int runtime_invisible_type_annotations_length = 0; 3216 bool runtime_invisible_type_annotations_exists = false; 3217 bool runtime_invisible_annotations_exists = false; 3218 bool parsed_source_debug_ext_annotations_exist = false; 3219 const u1* inner_classes_attribute_start = NULL; 3220 u4 inner_classes_attribute_length = 0; 3221 u2 enclosing_method_class_index = 0; 3222 u2 enclosing_method_method_index = 0; 3223 // Iterate over attributes 3224 while (attributes_count--) { 3225 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3226 const u2 attribute_name_index = cfs->get_u2_fast(); 3227 const u4 attribute_length = cfs->get_u4_fast(); 3228 check_property( 3229 valid_symbol_at(attribute_name_index), 3230 "Attribute name has bad constant pool index %u in class file %s", 3231 attribute_name_index, CHECK); 3232 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3233 if (tag == vmSymbols::tag_source_file()) { 3234 // Check for SourceFile tag 3235 if (_need_verify) { 3236 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3237 } 3238 if (parsed_sourcefile_attribute) { 3239 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3240 } else { 3241 parsed_sourcefile_attribute = true; 3242 } 3243 parse_classfile_sourcefile_attribute(cfs, CHECK); 3244 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3245 // Check for SourceDebugExtension tag 3246 if (parsed_source_debug_ext_annotations_exist) { 3247 classfile_parse_error( 3248 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3249 } 3250 parsed_source_debug_ext_annotations_exist = true; 3251 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3252 } else if (tag == vmSymbols::tag_inner_classes()) { 3253 // Check for InnerClasses tag 3254 if (parsed_innerclasses_attribute) { 3255 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3256 } else { 3257 parsed_innerclasses_attribute = true; 3258 } 3259 inner_classes_attribute_start = cfs->get_u1_buffer(); 3260 inner_classes_attribute_length = attribute_length; 3261 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3262 } else if (tag == vmSymbols::tag_synthetic()) { 3263 // Check for Synthetic tag 3264 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3265 if (attribute_length != 0) { 3266 classfile_parse_error( 3267 "Invalid Synthetic classfile attribute length %u in class file %s", 3268 attribute_length, CHECK); 3269 } 3270 parse_classfile_synthetic_attribute(CHECK); 3271 } else if (tag == vmSymbols::tag_deprecated()) { 3272 // Check for Deprecatd tag - 4276120 3273 if (attribute_length != 0) { 3274 classfile_parse_error( 3275 "Invalid Deprecated classfile attribute length %u in class file %s", 3276 attribute_length, CHECK); 3277 } 3278 } else if (_major_version >= JAVA_1_5_VERSION) { 3279 if (tag == vmSymbols::tag_signature()) { 3280 if (attribute_length != 2) { 3281 classfile_parse_error( 3282 "Wrong Signature attribute length %u in class file %s", 3283 attribute_length, CHECK); 3284 } 3285 parse_classfile_signature_attribute(cfs, CHECK); 3286 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3287 if (runtime_visible_annotations != NULL) { 3288 classfile_parse_error( 3289 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3290 } 3291 runtime_visible_annotations_length = attribute_length; 3292 runtime_visible_annotations = cfs->get_u1_buffer(); 3293 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3294 parse_annotations(cp, 3295 runtime_visible_annotations, 3296 runtime_visible_annotations_length, 3297 parsed_annotations, 3298 _loader_data, 3299 CHECK); 3300 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 3301 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3302 if (runtime_invisible_annotations_exists) { 3303 classfile_parse_error( 3304 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3305 } 3306 runtime_invisible_annotations_exists = true; 3307 if (PreserveAllAnnotations) { 3308 runtime_invisible_annotations_length = attribute_length; 3309 runtime_invisible_annotations = cfs->get_u1_buffer(); 3310 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3311 } 3312 cfs->skip_u1(attribute_length, CHECK); 3313 } else if (tag == vmSymbols::tag_enclosing_method()) { 3314 if (parsed_enclosingmethod_attribute) { 3315 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3316 } else { 3317 parsed_enclosingmethod_attribute = true; 3318 } 3319 guarantee_property(attribute_length == 4, 3320 "Wrong EnclosingMethod attribute length %u in class file %s", 3321 attribute_length, CHECK); 3322 cfs->guarantee_more(4, CHECK); // class_index, method_index 3323 enclosing_method_class_index = cfs->get_u2_fast(); 3324 enclosing_method_method_index = cfs->get_u2_fast(); 3325 if (enclosing_method_class_index == 0) { 3326 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3327 } 3328 // Validate the constant pool indices and types 3329 check_property(valid_klass_reference_at(enclosing_method_class_index), 3330 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3331 if (enclosing_method_method_index != 0 && 3332 (!cp->is_within_bounds(enclosing_method_method_index) || 3333 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3334 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3335 } 3336 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3337 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3338 if (parsed_bootstrap_methods_attribute) 3339 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3340 parsed_bootstrap_methods_attribute = true; 3341 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3342 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3343 if (runtime_visible_type_annotations != NULL) { 3344 classfile_parse_error( 3345 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3346 } 3347 runtime_visible_type_annotations_length = attribute_length; 3348 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3349 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3350 // No need for the VM to parse Type annotations 3351 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3352 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3353 if (runtime_invisible_type_annotations_exists) { 3354 classfile_parse_error( 3355 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3356 } else { 3357 runtime_invisible_type_annotations_exists = true; 3358 } 3359 if (PreserveAllAnnotations) { 3360 runtime_invisible_type_annotations_length = attribute_length; 3361 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3362 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3363 } 3364 cfs->skip_u1(attribute_length, CHECK); 3365 } else { 3366 // Unknown attribute 3367 cfs->skip_u1(attribute_length, CHECK); 3368 } 3369 } else { 3370 // Unknown attribute 3371 cfs->skip_u1(attribute_length, CHECK); 3372 } 3373 } 3374 _annotations = assemble_annotations(runtime_visible_annotations, 3375 runtime_visible_annotations_length, 3376 runtime_invisible_annotations, 3377 runtime_invisible_annotations_length, 3378 CHECK); 3379 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3380 runtime_visible_type_annotations_length, 3381 runtime_invisible_type_annotations, 3382 runtime_invisible_type_annotations_length, 3383 CHECK); 3384 3385 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3386 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3387 cfs, 3388 inner_classes_attribute_start, 3389 parsed_innerclasses_attribute, 3390 enclosing_method_class_index, 3391 enclosing_method_method_index, 3392 CHECK); 3393 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3394 guarantee_property( 3395 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3396 "Wrong InnerClasses attribute length in class file %s", CHECK); 3397 } 3398 } 3399 3400 if (_max_bootstrap_specifier_index >= 0) { 3401 guarantee_property(parsed_bootstrap_methods_attribute, 3402 "Missing BootstrapMethods attribute in class file %s", CHECK); 3403 } 3404 } 3405 3406 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3407 assert(k != NULL, "invariant"); 3408 3409 if (_synthetic_flag) 3410 k->set_is_synthetic(); 3411 if (_sourcefile_index != 0) { 3412 k->set_source_file_name_index(_sourcefile_index); 3413 } 3414 if (_generic_signature_index != 0) { 3415 k->set_generic_signature_index(_generic_signature_index); 3416 } 3417 if (_sde_buffer != NULL) { 3418 k->set_source_debug_extension(_sde_buffer, _sde_length); 3419 } 3420 } 3421 3422 // Create the Annotations object that will 3423 // hold the annotations array for the Klass. 3424 void ClassFileParser::create_combined_annotations(TRAPS) { 3425 if (_annotations == NULL && 3426 _type_annotations == NULL && 3427 _fields_annotations == NULL && 3428 _fields_type_annotations == NULL) { 3429 // Don't create the Annotations object unnecessarily. 3430 return; 3431 } 3432 3433 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3434 annotations->set_class_annotations(_annotations); 3435 annotations->set_class_type_annotations(_type_annotations); 3436 annotations->set_fields_annotations(_fields_annotations); 3437 annotations->set_fields_type_annotations(_fields_type_annotations); 3438 3439 // This is the Annotations object that will be 3440 // assigned to InstanceKlass being constructed. 3441 _combined_annotations = annotations; 3442 3443 // The annotations arrays below has been transfered the 3444 // _combined_annotations so these fields can now be cleared. 3445 _annotations = NULL; 3446 _type_annotations = NULL; 3447 _fields_annotations = NULL; 3448 _fields_type_annotations = NULL; 3449 } 3450 3451 // Transfer ownership of metadata allocated to the InstanceKlass. 3452 void ClassFileParser::apply_parsed_class_metadata( 3453 InstanceKlass* this_klass, 3454 int java_fields_count, TRAPS) { 3455 assert(this_klass != NULL, "invariant"); 3456 3457 _cp->set_pool_holder(this_klass); 3458 this_klass->set_constants(_cp); 3459 this_klass->set_fields(_fields, java_fields_count); 3460 this_klass->set_methods(_methods); 3461 this_klass->set_inner_classes(_inner_classes); 3462 this_klass->set_local_interfaces(_local_interfaces); 3463 this_klass->set_transitive_interfaces(_transitive_interfaces); 3464 this_klass->set_annotations(_combined_annotations); 3465 3466 // Clear out these fields so they don't get deallocated by the destructor 3467 clear_class_metadata(); 3468 } 3469 3470 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3471 int runtime_visible_annotations_length, 3472 const u1* const runtime_invisible_annotations, 3473 int runtime_invisible_annotations_length, 3474 TRAPS) { 3475 AnnotationArray* annotations = NULL; 3476 if (runtime_visible_annotations != NULL || 3477 runtime_invisible_annotations != NULL) { 3478 annotations = MetadataFactory::new_array<u1>(_loader_data, 3479 runtime_visible_annotations_length + 3480 runtime_invisible_annotations_length, 3481 CHECK_(annotations)); 3482 if (runtime_visible_annotations != NULL) { 3483 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3484 annotations->at_put(i, runtime_visible_annotations[i]); 3485 } 3486 } 3487 if (runtime_invisible_annotations != NULL) { 3488 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3489 int append = runtime_visible_annotations_length+i; 3490 annotations->at_put(append, runtime_invisible_annotations[i]); 3491 } 3492 } 3493 } 3494 return annotations; 3495 } 3496 3497 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3498 const int super_class_index, 3499 const bool need_verify, 3500 TRAPS) { 3501 assert(cp != NULL, "invariant"); 3502 const InstanceKlass* super_klass = NULL; 3503 3504 if (super_class_index == 0) { 3505 check_property(_class_name == vmSymbols::java_lang_Object(), 3506 "Invalid superclass index %u in class file %s", 3507 super_class_index, 3508 CHECK_NULL); 3509 } else { 3510 check_property(valid_klass_reference_at(super_class_index), 3511 "Invalid superclass index %u in class file %s", 3512 super_class_index, 3513 CHECK_NULL); 3514 // The class name should be legal because it is checked when parsing constant pool. 3515 // However, make sure it is not an array type. 3516 bool is_array = false; 3517 if (cp->tag_at(super_class_index).is_klass()) { 3518 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3519 if (need_verify) 3520 is_array = super_klass->is_array_klass(); 3521 } else if (need_verify) { 3522 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3523 } 3524 if (need_verify) { 3525 guarantee_property(!is_array, 3526 "Bad superclass name in class file %s", CHECK_NULL); 3527 } 3528 } 3529 return super_klass; 3530 } 3531 3532 static unsigned int compute_oop_map_count(const InstanceKlass* super, 3533 unsigned int nonstatic_oop_map_count, 3534 int first_nonstatic_oop_offset) { 3535 3536 unsigned int map_count = 3537 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3538 if (nonstatic_oop_map_count > 0) { 3539 // We have oops to add to map 3540 if (map_count == 0) { 3541 map_count = nonstatic_oop_map_count; 3542 } 3543 else { 3544 // Check whether we should add a new map block or whether the last one can 3545 // be extended 3546 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3547 const OopMapBlock* const last_map = first_map + map_count - 1; 3548 3549 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3550 if (next_offset == first_nonstatic_oop_offset) { 3551 // There is no gap bettwen superklass's last oop field and first 3552 // local oop field, merge maps. 3553 nonstatic_oop_map_count -= 1; 3554 } 3555 else { 3556 // Superklass didn't end with a oop field, add extra maps 3557 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3558 } 3559 map_count += nonstatic_oop_map_count; 3560 } 3561 } 3562 return map_count; 3563 } 3564 3565 #ifndef PRODUCT 3566 static void print_field_layout(const Symbol* name, 3567 Array<u2>* fields, 3568 constantPoolHandle cp, 3569 int instance_size, 3570 int instance_fields_start, 3571 int instance_fields_end, 3572 int static_fields_end) { 3573 3574 assert(name != NULL, "invariant"); 3575 3576 tty->print("%s: field layout\n", name->as_klass_external_name()); 3577 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3578 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3579 if (!fs.access_flags().is_static()) { 3580 tty->print(" @%3d \"%s\" %s\n", 3581 fs.offset(), 3582 fs.name()->as_klass_external_name(), 3583 fs.signature()->as_klass_external_name()); 3584 } 3585 } 3586 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3587 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3588 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3589 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3590 if (fs.access_flags().is_static()) { 3591 tty->print(" @%3d \"%s\" %s\n", 3592 fs.offset(), 3593 fs.name()->as_klass_external_name(), 3594 fs.signature()->as_klass_external_name()); 3595 } 3596 } 3597 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3598 tty->print("\n"); 3599 } 3600 #endif 3601 3602 // Values needed for oopmap and InstanceKlass creation 3603 class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3604 public: 3605 int* nonstatic_oop_offsets; 3606 unsigned int* nonstatic_oop_counts; 3607 unsigned int nonstatic_oop_map_count; 3608 unsigned int total_oop_map_count; 3609 int instance_size; 3610 int nonstatic_field_size; 3611 int static_field_size; 3612 bool has_nonstatic_fields; 3613 }; 3614 3615 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3616 void ClassFileParser::layout_fields(ConstantPool* cp, 3617 const FieldAllocationCount* fac, 3618 const ClassAnnotationCollector* parsed_annotations, 3619 FieldLayoutInfo* info, 3620 TRAPS) { 3621 3622 assert(cp != NULL, "invariant"); 3623 3624 // Field size and offset computation 3625 int nonstatic_field_size = _super_klass == NULL ? 0 : 3626 _super_klass->nonstatic_field_size(); 3627 3628 // Count the contended fields by type. 3629 // 3630 // We ignore static fields, because @Contended is not supported for them. 3631 // The layout code below will also ignore the static fields. 3632 int nonstatic_contended_count = 0; 3633 FieldAllocationCount fac_contended; 3634 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3635 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3636 if (fs.is_contended()) { 3637 fac_contended.count[atype]++; 3638 if (!fs.access_flags().is_static()) { 3639 nonstatic_contended_count++; 3640 } 3641 } 3642 } 3643 3644 3645 // Calculate the starting byte offsets 3646 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3647 int next_static_double_offset = next_static_oop_offset + 3648 ((fac->count[STATIC_OOP]) * heapOopSize); 3649 if ( fac->count[STATIC_DOUBLE] && 3650 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3651 Universe::field_type_should_be_aligned(T_LONG)) ) { 3652 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3653 } 3654 3655 int next_static_word_offset = next_static_double_offset + 3656 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3657 int next_static_short_offset = next_static_word_offset + 3658 ((fac->count[STATIC_WORD]) * BytesPerInt); 3659 int next_static_byte_offset = next_static_short_offset + 3660 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3661 3662 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3663 nonstatic_field_size * heapOopSize; 3664 3665 int next_nonstatic_field_offset = nonstatic_fields_start; 3666 3667 const bool is_contended_class = parsed_annotations->is_contended(); 3668 3669 // Class is contended, pad before all the fields 3670 if (is_contended_class) { 3671 next_nonstatic_field_offset += ContendedPaddingWidth; 3672 } 3673 3674 // Compute the non-contended fields count. 3675 // The packing code below relies on these counts to determine if some field 3676 // can be squeezed into the alignment gap. Contended fields are obviously 3677 // exempt from that. 3678 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3679 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3680 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3681 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3682 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3683 3684 // Total non-static fields count, including every contended field 3685 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3686 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3687 fac->count[NONSTATIC_OOP]; 3688 3689 const bool super_has_nonstatic_fields = 3690 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3691 const bool has_nonstatic_fields = 3692 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3693 3694 3695 // Prepare list of oops for oop map generation. 3696 // 3697 // "offset" and "count" lists are describing the set of contiguous oop 3698 // regions. offset[i] is the start of the i-th region, which then has 3699 // count[i] oops following. Before we know how many regions are required, 3700 // we pessimistically allocate the maps to fit all the oops into the 3701 // distinct regions. 3702 // 3703 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3704 // to figure out if we still need to do this. 3705 unsigned int nonstatic_oop_map_count = 0; 3706 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3707 3708 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3709 THREAD, int, max_nonstatic_oop_maps); 3710 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3711 THREAD, unsigned int, max_nonstatic_oop_maps); 3712 3713 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3714 3715 bool compact_fields = CompactFields; 3716 int allocation_style = FieldsAllocationStyle; 3717 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3718 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3719 allocation_style = 1; // Optimistic 3720 } 3721 3722 // The next classes have predefined hard-coded fields offsets 3723 // (see in JavaClasses::compute_hard_coded_offsets()). 3724 // Use default fields allocation order for them. 3725 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3726 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3727 _class_name == vmSymbols::java_lang_Class() || 3728 _class_name == vmSymbols::java_lang_ClassLoader() || 3729 _class_name == vmSymbols::java_lang_ref_Reference() || 3730 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3731 _class_name == vmSymbols::java_lang_StackTraceElement() || 3732 _class_name == vmSymbols::java_lang_String() || 3733 _class_name == vmSymbols::java_lang_Throwable() || 3734 _class_name == vmSymbols::java_lang_Boolean() || 3735 _class_name == vmSymbols::java_lang_Character() || 3736 _class_name == vmSymbols::java_lang_Float() || 3737 _class_name == vmSymbols::java_lang_Double() || 3738 _class_name == vmSymbols::java_lang_Byte() || 3739 _class_name == vmSymbols::java_lang_Short() || 3740 _class_name == vmSymbols::java_lang_Integer() || 3741 _class_name == vmSymbols::java_lang_Long())) { 3742 allocation_style = 0; // Allocate oops first 3743 compact_fields = false; // Don't compact fields 3744 } 3745 3746 int next_nonstatic_oop_offset = 0; 3747 int next_nonstatic_double_offset = 0; 3748 3749 // Rearrange fields for a given allocation style 3750 if( allocation_style == 0 ) { 3751 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3752 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3753 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3754 (nonstatic_oop_count * heapOopSize); 3755 } else if( allocation_style == 1 ) { 3756 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3757 next_nonstatic_double_offset = next_nonstatic_field_offset; 3758 } else if( allocation_style == 2 ) { 3759 // Fields allocation: oops fields in super and sub classes are together. 3760 if( nonstatic_field_size > 0 && _super_klass != NULL && 3761 _super_klass->nonstatic_oop_map_size() > 0 ) { 3762 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3763 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3764 const OopMapBlock* const last_map = first_map + map_count - 1; 3765 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3766 if (next_offset == next_nonstatic_field_offset) { 3767 allocation_style = 0; // allocate oops first 3768 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3769 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3770 (nonstatic_oop_count * heapOopSize); 3771 } 3772 } 3773 if( allocation_style == 2 ) { 3774 allocation_style = 1; // allocate oops last 3775 next_nonstatic_double_offset = next_nonstatic_field_offset; 3776 } 3777 } else { 3778 ShouldNotReachHere(); 3779 } 3780 3781 int nonstatic_oop_space_count = 0; 3782 int nonstatic_word_space_count = 0; 3783 int nonstatic_short_space_count = 0; 3784 int nonstatic_byte_space_count = 0; 3785 int nonstatic_oop_space_offset = 0; 3786 int nonstatic_word_space_offset = 0; 3787 int nonstatic_short_space_offset = 0; 3788 int nonstatic_byte_space_offset = 0; 3789 3790 // Try to squeeze some of the fields into the gaps due to 3791 // long/double alignment. 3792 if (nonstatic_double_count > 0) { 3793 int offset = next_nonstatic_double_offset; 3794 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3795 if (compact_fields && offset != next_nonstatic_double_offset) { 3796 // Allocate available fields into the gap before double field. 3797 int length = next_nonstatic_double_offset - offset; 3798 assert(length == BytesPerInt, ""); 3799 nonstatic_word_space_offset = offset; 3800 if (nonstatic_word_count > 0) { 3801 nonstatic_word_count -= 1; 3802 nonstatic_word_space_count = 1; // Only one will fit 3803 length -= BytesPerInt; 3804 offset += BytesPerInt; 3805 } 3806 nonstatic_short_space_offset = offset; 3807 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3808 nonstatic_short_count -= 1; 3809 nonstatic_short_space_count += 1; 3810 length -= BytesPerShort; 3811 offset += BytesPerShort; 3812 } 3813 nonstatic_byte_space_offset = offset; 3814 while (length > 0 && nonstatic_byte_count > 0) { 3815 nonstatic_byte_count -= 1; 3816 nonstatic_byte_space_count += 1; 3817 length -= 1; 3818 } 3819 // Allocate oop field in the gap if there are no other fields for that. 3820 nonstatic_oop_space_offset = offset; 3821 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3822 allocation_style != 0) { // when oop fields not first 3823 nonstatic_oop_count -= 1; 3824 nonstatic_oop_space_count = 1; // Only one will fit 3825 length -= heapOopSize; 3826 offset += heapOopSize; 3827 } 3828 } 3829 } 3830 3831 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3832 (nonstatic_double_count * BytesPerLong); 3833 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3834 (nonstatic_word_count * BytesPerInt); 3835 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3836 (nonstatic_short_count * BytesPerShort); 3837 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3838 nonstatic_byte_count; 3839 3840 // let oops jump before padding with this allocation style 3841 if( allocation_style == 1 ) { 3842 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3843 if( nonstatic_oop_count > 0 ) { 3844 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3845 } 3846 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3847 } 3848 3849 // Iterate over fields again and compute correct offsets. 3850 // The field allocation type was temporarily stored in the offset slot. 3851 // oop fields are located before non-oop fields (static and non-static). 3852 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3853 3854 // skip already laid out fields 3855 if (fs.is_offset_set()) continue; 3856 3857 // contended instance fields are handled below 3858 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3859 3860 int real_offset = 0; 3861 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3862 3863 // pack the rest of the fields 3864 switch (atype) { 3865 case STATIC_OOP: 3866 real_offset = next_static_oop_offset; 3867 next_static_oop_offset += heapOopSize; 3868 break; 3869 case STATIC_BYTE: 3870 real_offset = next_static_byte_offset; 3871 next_static_byte_offset += 1; 3872 break; 3873 case STATIC_SHORT: 3874 real_offset = next_static_short_offset; 3875 next_static_short_offset += BytesPerShort; 3876 break; 3877 case STATIC_WORD: 3878 real_offset = next_static_word_offset; 3879 next_static_word_offset += BytesPerInt; 3880 break; 3881 case STATIC_DOUBLE: 3882 real_offset = next_static_double_offset; 3883 next_static_double_offset += BytesPerLong; 3884 break; 3885 case NONSTATIC_OOP: 3886 if( nonstatic_oop_space_count > 0 ) { 3887 real_offset = nonstatic_oop_space_offset; 3888 nonstatic_oop_space_offset += heapOopSize; 3889 nonstatic_oop_space_count -= 1; 3890 } else { 3891 real_offset = next_nonstatic_oop_offset; 3892 next_nonstatic_oop_offset += heapOopSize; 3893 } 3894 3895 // Record this oop in the oop maps 3896 if( nonstatic_oop_map_count > 0 && 3897 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3898 real_offset - 3899 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3900 heapOopSize ) { 3901 // This oop is adjacent to the previous one, add to current oop map 3902 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3903 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3904 } else { 3905 // This oop is not adjacent to the previous one, create new oop map 3906 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3907 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3908 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3909 nonstatic_oop_map_count += 1; 3910 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3911 first_nonstatic_oop_offset = real_offset; 3912 } 3913 } 3914 break; 3915 case NONSTATIC_BYTE: 3916 if( nonstatic_byte_space_count > 0 ) { 3917 real_offset = nonstatic_byte_space_offset; 3918 nonstatic_byte_space_offset += 1; 3919 nonstatic_byte_space_count -= 1; 3920 } else { 3921 real_offset = next_nonstatic_byte_offset; 3922 next_nonstatic_byte_offset += 1; 3923 } 3924 break; 3925 case NONSTATIC_SHORT: 3926 if( nonstatic_short_space_count > 0 ) { 3927 real_offset = nonstatic_short_space_offset; 3928 nonstatic_short_space_offset += BytesPerShort; 3929 nonstatic_short_space_count -= 1; 3930 } else { 3931 real_offset = next_nonstatic_short_offset; 3932 next_nonstatic_short_offset += BytesPerShort; 3933 } 3934 break; 3935 case NONSTATIC_WORD: 3936 if( nonstatic_word_space_count > 0 ) { 3937 real_offset = nonstatic_word_space_offset; 3938 nonstatic_word_space_offset += BytesPerInt; 3939 nonstatic_word_space_count -= 1; 3940 } else { 3941 real_offset = next_nonstatic_word_offset; 3942 next_nonstatic_word_offset += BytesPerInt; 3943 } 3944 break; 3945 case NONSTATIC_DOUBLE: 3946 real_offset = next_nonstatic_double_offset; 3947 next_nonstatic_double_offset += BytesPerLong; 3948 break; 3949 default: 3950 ShouldNotReachHere(); 3951 } 3952 fs.set_offset(real_offset); 3953 } 3954 3955 3956 // Handle the contended cases. 3957 // 3958 // Each contended field should not intersect the cache line with another contended field. 3959 // In the absence of alignment information, we end up with pessimistically separating 3960 // the fields with full-width padding. 3961 // 3962 // Additionally, this should not break alignment for the fields, so we round the alignment up 3963 // for each field. 3964 if (nonstatic_contended_count > 0) { 3965 3966 // if there is at least one contended field, we need to have pre-padding for them 3967 next_nonstatic_padded_offset += ContendedPaddingWidth; 3968 3969 // collect all contended groups 3970 BitMap bm(cp->size()); 3971 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3972 // skip already laid out fields 3973 if (fs.is_offset_set()) continue; 3974 3975 if (fs.is_contended()) { 3976 bm.set_bit(fs.contended_group()); 3977 } 3978 } 3979 3980 int current_group = -1; 3981 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 3982 3983 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3984 3985 // skip already laid out fields 3986 if (fs.is_offset_set()) continue; 3987 3988 // skip non-contended fields and fields from different group 3989 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 3990 3991 // handle statics below 3992 if (fs.access_flags().is_static()) continue; 3993 3994 int real_offset = 0; 3995 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3996 3997 switch (atype) { 3998 case NONSTATIC_BYTE: 3999 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 4000 real_offset = next_nonstatic_padded_offset; 4001 next_nonstatic_padded_offset += 1; 4002 break; 4003 4004 case NONSTATIC_SHORT: 4005 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4006 real_offset = next_nonstatic_padded_offset; 4007 next_nonstatic_padded_offset += BytesPerShort; 4008 break; 4009 4010 case NONSTATIC_WORD: 4011 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4012 real_offset = next_nonstatic_padded_offset; 4013 next_nonstatic_padded_offset += BytesPerInt; 4014 break; 4015 4016 case NONSTATIC_DOUBLE: 4017 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4018 real_offset = next_nonstatic_padded_offset; 4019 next_nonstatic_padded_offset += BytesPerLong; 4020 break; 4021 4022 case NONSTATIC_OOP: 4023 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4024 real_offset = next_nonstatic_padded_offset; 4025 next_nonstatic_padded_offset += heapOopSize; 4026 4027 // Record this oop in the oop maps 4028 if( nonstatic_oop_map_count > 0 && 4029 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4030 real_offset - 4031 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4032 heapOopSize ) { 4033 // This oop is adjacent to the previous one, add to current oop map 4034 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4035 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4036 } else { 4037 // This oop is not adjacent to the previous one, create new oop map 4038 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4039 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4040 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4041 nonstatic_oop_map_count += 1; 4042 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4043 first_nonstatic_oop_offset = real_offset; 4044 } 4045 } 4046 break; 4047 4048 default: 4049 ShouldNotReachHere(); 4050 } 4051 4052 if (fs.contended_group() == 0) { 4053 // Contended group defines the equivalence class over the fields: 4054 // the fields within the same contended group are not inter-padded. 4055 // The only exception is default group, which does not incur the 4056 // equivalence, and so requires intra-padding. 4057 next_nonstatic_padded_offset += ContendedPaddingWidth; 4058 } 4059 4060 fs.set_offset(real_offset); 4061 } // for 4062 4063 // Start laying out the next group. 4064 // Note that this will effectively pad the last group in the back; 4065 // this is expected to alleviate memory contention effects for 4066 // subclass fields and/or adjacent object. 4067 // If this was the default group, the padding is already in place. 4068 if (current_group != 0) { 4069 next_nonstatic_padded_offset += ContendedPaddingWidth; 4070 } 4071 } 4072 4073 // handle static fields 4074 } 4075 4076 // Entire class is contended, pad in the back. 4077 // This helps to alleviate memory contention effects for subclass fields 4078 // and/or adjacent object. 4079 if (is_contended_class) { 4080 next_nonstatic_padded_offset += ContendedPaddingWidth; 4081 } 4082 4083 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4084 4085 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); 4086 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4087 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4088 4089 int static_field_size = (static_fields_end - 4090 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4091 nonstatic_field_size = nonstatic_field_size + 4092 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4093 4094 int instance_size = align_object_size(instance_end / wordSize); 4095 4096 assert(instance_size == align_object_size(align_size_up( 4097 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4098 wordSize) / wordSize), "consistent layout helper value"); 4099 4100 // Invariant: nonstatic_field end/start should only change if there are 4101 // nonstatic fields in the class, or if the class is contended. We compare 4102 // against the non-aligned value, so that end alignment will not fail the 4103 // assert without actually having the fields. 4104 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4105 is_contended_class || 4106 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4107 4108 // Number of non-static oop map blocks allocated at end of klass. 4109 const unsigned int total_oop_map_count = 4110 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4111 first_nonstatic_oop_offset); 4112 4113 #ifndef PRODUCT 4114 if (PrintFieldLayout) { 4115 print_field_layout(_class_name, 4116 _fields, 4117 cp, 4118 instance_size, 4119 nonstatic_fields_start, 4120 nonstatic_fields_end, 4121 static_fields_end); 4122 } 4123 4124 #endif 4125 // Pass back information needed for InstanceKlass creation 4126 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4127 info->nonstatic_oop_counts = nonstatic_oop_counts; 4128 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4129 info->total_oop_map_count = total_oop_map_count; 4130 info->instance_size = instance_size; 4131 info->static_field_size = static_field_size; 4132 info->nonstatic_field_size = nonstatic_field_size; 4133 info->has_nonstatic_fields = has_nonstatic_fields; 4134 } 4135 4136 static void fill_oop_maps(const InstanceKlass* k, 4137 unsigned int nonstatic_oop_map_count, 4138 const int* nonstatic_oop_offsets, 4139 const unsigned int* nonstatic_oop_counts) { 4140 4141 assert(k != NULL, "invariant"); 4142 4143 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4144 const InstanceKlass* const super = k->superklass(); 4145 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4146 if (super_count > 0) { 4147 // Copy maps from superklass 4148 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4149 for (unsigned int i = 0; i < super_count; ++i) { 4150 *this_oop_map++ = *super_oop_map++; 4151 } 4152 } 4153 4154 if (nonstatic_oop_map_count > 0) { 4155 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4156 // The counts differ because there is no gap between superklass's last oop 4157 // field and the first local oop field. Extend the last oop map copied 4158 // from the superklass instead of creating new one. 4159 nonstatic_oop_map_count--; 4160 nonstatic_oop_offsets++; 4161 this_oop_map--; 4162 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4163 this_oop_map++; 4164 } 4165 4166 // Add new map blocks, fill them 4167 while (nonstatic_oop_map_count-- > 0) { 4168 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4169 this_oop_map->set_count(*nonstatic_oop_counts++); 4170 this_oop_map++; 4171 } 4172 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4173 this_oop_map, "sanity"); 4174 } 4175 } 4176 4177 4178 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4179 assert(ik != NULL, "invariant"); 4180 4181 const Klass* const super = ik->super(); 4182 4183 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4184 // in which case we don't have to register objects as finalizable 4185 if (!_has_empty_finalizer) { 4186 if (_has_finalizer || 4187 (super != NULL && super->has_finalizer())) { 4188 ik->set_has_finalizer(); 4189 } 4190 } 4191 4192 #ifdef ASSERT 4193 bool f = false; 4194 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4195 vmSymbols::void_method_signature()); 4196 if (m != NULL && !m->is_empty_method()) { 4197 f = true; 4198 } 4199 4200 // Spec doesn't prevent agent from redefinition of empty finalizer. 4201 // Despite the fact that it's generally bad idea and redefined finalizer 4202 // will not work as expected we shouldn't abort vm in this case 4203 if (!ik->has_redefined_this_or_super()) { 4204 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4205 } 4206 #endif 4207 4208 // Check if this klass supports the java.lang.Cloneable interface 4209 if (SystemDictionary::Cloneable_klass_loaded()) { 4210 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4211 ik->set_is_cloneable(); 4212 } 4213 } 4214 4215 // Check if this klass has a vanilla default constructor 4216 if (super == NULL) { 4217 // java.lang.Object has empty default constructor 4218 ik->set_has_vanilla_constructor(); 4219 } else { 4220 if (super->has_vanilla_constructor() && 4221 _has_vanilla_constructor) { 4222 ik->set_has_vanilla_constructor(); 4223 } 4224 #ifdef ASSERT 4225 bool v = false; 4226 if (super->has_vanilla_constructor()) { 4227 const Method* const constructor = 4228 ik->find_method(vmSymbols::object_initializer_name(), 4229 vmSymbols::void_method_signature()); 4230 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4231 v = true; 4232 } 4233 } 4234 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4235 #endif 4236 } 4237 4238 // If it cannot be fast-path allocated, set a bit in the layout helper. 4239 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4240 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4241 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4242 || ik->is_abstract() || ik->is_interface() 4243 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4244 || ik->size_helper() >= FastAllocateSizeLimit) { 4245 // Forbid fast-path allocation. 4246 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4247 ik->set_layout_helper(lh); 4248 } 4249 } 4250 4251 // Attach super classes and interface classes to class loader data 4252 static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4253 TRAPS) { 4254 assert(defined_klass != NULL, "invariant"); 4255 4256 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4257 if (defining_loader_data->is_the_null_class_loader_data()) { 4258 // Dependencies to null class loader data are implicit. 4259 return; 4260 } else { 4261 // add super class dependency 4262 Klass* const super = defined_klass->super(); 4263 if (super != NULL) { 4264 defining_loader_data->record_dependency(super, CHECK); 4265 } 4266 4267 // add super interface dependencies 4268 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4269 if (local_interfaces != NULL) { 4270 const int length = local_interfaces->length(); 4271 for (int i = 0; i < length; i++) { 4272 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4273 } 4274 } 4275 } 4276 } 4277 4278 // utility methods for appending an array with check for duplicates 4279 4280 static void append_interfaces(GrowableArray<Klass*>* result, 4281 const Array<Klass*>* const ifs) { 4282 // iterate over new interfaces 4283 for (int i = 0; i < ifs->length(); i++) { 4284 Klass* const e = ifs->at(i); 4285 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4286 // add new interface 4287 result->append_if_missing(e); 4288 } 4289 } 4290 4291 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4292 Array<Klass*>* local_ifs, 4293 ClassLoaderData* loader_data, 4294 TRAPS) { 4295 assert(local_ifs != NULL, "invariant"); 4296 assert(loader_data != NULL, "invariant"); 4297 4298 // Compute maximum size for transitive interfaces 4299 int max_transitive_size = 0; 4300 int super_size = 0; 4301 // Add superclass transitive interfaces size 4302 if (super != NULL) { 4303 super_size = super->transitive_interfaces()->length(); 4304 max_transitive_size += super_size; 4305 } 4306 // Add local interfaces' super interfaces 4307 const int local_size = local_ifs->length(); 4308 for (int i = 0; i < local_size; i++) { 4309 Klass* const l = local_ifs->at(i); 4310 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4311 } 4312 // Finally add local interfaces 4313 max_transitive_size += local_size; 4314 // Construct array 4315 if (max_transitive_size == 0) { 4316 // no interfaces, use canonicalized array 4317 return Universe::the_empty_klass_array(); 4318 } else if (max_transitive_size == super_size) { 4319 // no new local interfaces added, share superklass' transitive interface array 4320 return super->transitive_interfaces(); 4321 } else if (max_transitive_size == local_size) { 4322 // only local interfaces added, share local interface array 4323 return local_ifs; 4324 } else { 4325 ResourceMark rm; 4326 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4327 4328 // Copy down from superclass 4329 if (super != NULL) { 4330 append_interfaces(result, super->transitive_interfaces()); 4331 } 4332 4333 // Copy down from local interfaces' superinterfaces 4334 for (int i = 0; i < local_size; i++) { 4335 Klass* const l = local_ifs->at(i); 4336 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4337 } 4338 // Finally add local interfaces 4339 append_interfaces(result, local_ifs); 4340 4341 // length will be less than the max_transitive_size if duplicates were removed 4342 const int length = result->length(); 4343 assert(length <= max_transitive_size, "just checking"); 4344 Array<Klass*>* const new_result = 4345 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4346 for (int i = 0; i < length; i++) { 4347 Klass* const e = result->at(i); 4348 assert(e != NULL, "just checking"); 4349 new_result->at_put(i, e); 4350 } 4351 return new_result; 4352 } 4353 } 4354 4355 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4356 assert(this_klass != NULL, "invariant"); 4357 const Klass* const super = this_klass->super(); 4358 if ((super != NULL) && 4359 (!Reflection::verify_class_access(this_klass, super, false))) { 4360 ResourceMark rm(THREAD); 4361 Exceptions::fthrow( 4362 THREAD_AND_LOCATION, 4363 vmSymbols::java_lang_IllegalAccessError(), 4364 "class %s cannot access its superclass %s", 4365 this_klass->external_name(), 4366 super->external_name() 4367 ); 4368 return; 4369 } 4370 } 4371 4372 4373 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4374 assert(this_klass != NULL, "invariant"); 4375 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4376 const int lng = local_interfaces->length(); 4377 for (int i = lng - 1; i >= 0; i--) { 4378 Klass* const k = local_interfaces->at(i); 4379 assert (k != NULL && k->is_interface(), "invalid interface"); 4380 if (!Reflection::verify_class_access(this_klass, k, false)) { 4381 ResourceMark rm(THREAD); 4382 Exceptions::fthrow( 4383 THREAD_AND_LOCATION, 4384 vmSymbols::java_lang_IllegalAccessError(), 4385 "class %s cannot access its superinterface %s", 4386 this_klass->external_name(), 4387 k->external_name() 4388 ); 4389 return; 4390 } 4391 } 4392 } 4393 4394 4395 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4396 assert(this_klass != NULL, "invariant"); 4397 const Array<Method*>* const methods = this_klass->methods(); 4398 const int num_methods = methods->length(); 4399 4400 // go thru each method and check if it overrides a final method 4401 for (int index = 0; index < num_methods; index++) { 4402 const Method* const m = methods->at(index); 4403 4404 // skip private, static, and <init> methods 4405 if ((!m->is_private() && !m->is_static()) && 4406 (m->name() != vmSymbols::object_initializer_name())) { 4407 4408 const Symbol* const name = m->name(); 4409 const Symbol* const signature = m->signature(); 4410 const Klass* k = this_klass->super(); 4411 const Method* super_m = NULL; 4412 while (k != NULL) { 4413 // skip supers that don't have final methods. 4414 if (k->has_final_method()) { 4415 // lookup a matching method in the super class hierarchy 4416 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4417 if (super_m == NULL) { 4418 break; // didn't find any match; get out 4419 } 4420 4421 if (super_m->is_final() && !super_m->is_static() && 4422 // matching method in super is final, and not static 4423 (Reflection::verify_field_access(this_klass, 4424 super_m->method_holder(), 4425 super_m->method_holder(), 4426 super_m->access_flags(), false)) 4427 // this class can access super final method and therefore override 4428 ) { 4429 ResourceMark rm(THREAD); 4430 Exceptions::fthrow( 4431 THREAD_AND_LOCATION, 4432 vmSymbols::java_lang_VerifyError(), 4433 "class %s overrides final method %s.%s%s", 4434 this_klass->external_name(), 4435 super_m->method_holder()->external_name(), 4436 name->as_C_string(), 4437 signature->as_C_string() 4438 ); 4439 return; 4440 } 4441 4442 // continue to look from super_m's holder's super. 4443 k = super_m->method_holder()->super(); 4444 continue; 4445 } 4446 4447 k = k->super(); 4448 } 4449 } 4450 } 4451 } 4452 4453 4454 // assumes that this_klass is an interface 4455 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4456 assert(this_klass != NULL, "invariant"); 4457 assert(this_klass->is_interface(), "not an interface"); 4458 const Array<Method*>* methods = this_klass->methods(); 4459 const int num_methods = methods->length(); 4460 4461 for (int index = 0; index < num_methods; index++) { 4462 const Method* const m = methods->at(index); 4463 // if m is static and not the init method, throw a verify error 4464 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4465 ResourceMark rm(THREAD); 4466 Exceptions::fthrow( 4467 THREAD_AND_LOCATION, 4468 vmSymbols::java_lang_VerifyError(), 4469 "Illegal static method %s in interface %s", 4470 m->name()->as_C_string(), 4471 this_klass->external_name() 4472 ); 4473 return; 4474 } 4475 } 4476 } 4477 4478 // utility methods for format checking 4479 4480 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4481 if (!_need_verify) { return; } 4482 4483 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4484 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4485 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4486 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4487 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4488 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4489 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4490 4491 if ((is_abstract && is_final) || 4492 (is_interface && !is_abstract) || 4493 (is_interface && major_gte_15 && (is_super || is_enum)) || 4494 (!is_interface && major_gte_15 && is_annotation)) { 4495 ResourceMark rm(THREAD); 4496 Exceptions::fthrow( 4497 THREAD_AND_LOCATION, 4498 vmSymbols::java_lang_ClassFormatError(), 4499 "Illegal class modifiers in class %s: 0x%X", 4500 _class_name->as_C_string(), flags 4501 ); 4502 return; 4503 } 4504 } 4505 4506 static bool has_illegal_visibility(jint flags) { 4507 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4508 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4509 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4510 4511 return ((is_public && is_protected) || 4512 (is_public && is_private) || 4513 (is_protected && is_private)); 4514 } 4515 4516 static bool is_supported_version(u2 major, u2 minor){ 4517 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4518 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4519 (major <= max_version) && 4520 ((major != max_version) || 4521 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4522 } 4523 4524 void ClassFileParser::verify_legal_field_modifiers(jint flags, 4525 bool is_interface, 4526 TRAPS) const { 4527 if (!_need_verify) { return; } 4528 4529 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4530 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4531 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4532 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4533 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4534 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4535 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4536 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4537 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4538 4539 bool is_illegal = false; 4540 4541 if (is_interface) { 4542 if (!is_public || !is_static || !is_final || is_private || 4543 is_protected || is_volatile || is_transient || 4544 (major_gte_15 && is_enum)) { 4545 is_illegal = true; 4546 } 4547 } else { // not interface 4548 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4549 is_illegal = true; 4550 } 4551 } 4552 4553 if (is_illegal) { 4554 ResourceMark rm(THREAD); 4555 Exceptions::fthrow( 4556 THREAD_AND_LOCATION, 4557 vmSymbols::java_lang_ClassFormatError(), 4558 "Illegal field modifiers in class %s: 0x%X", 4559 _class_name->as_C_string(), flags); 4560 return; 4561 } 4562 } 4563 4564 void ClassFileParser::verify_legal_method_modifiers(jint flags, 4565 bool is_interface, 4566 const Symbol* name, 4567 TRAPS) const { 4568 if (!_need_verify) { return; } 4569 4570 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4571 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4572 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4573 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4574 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4575 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4576 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4577 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4578 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4579 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4580 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4581 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4582 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4583 4584 bool is_illegal = false; 4585 4586 if (is_interface) { 4587 if (major_gte_8) { 4588 // Class file version is JAVA_8_VERSION or later Methods of 4589 // interfaces may set any of the flags except ACC_PROTECTED, 4590 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4591 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4592 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4593 (is_native || is_protected || is_final || is_synchronized) || 4594 // If a specific method of a class or interface has its 4595 // ACC_ABSTRACT flag set, it must not have any of its 4596 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4597 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4598 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4599 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4600 (is_abstract && (is_private || is_static || is_strict))) { 4601 is_illegal = true; 4602 } 4603 } else if (major_gte_15) { 4604 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4605 if (!is_public || is_private || is_protected || is_static || is_final || 4606 is_synchronized || is_native || !is_abstract || is_strict) { 4607 is_illegal = true; 4608 } 4609 } else { 4610 // Class file version is pre-JAVA_1_5_VERSION 4611 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4612 is_illegal = true; 4613 } 4614 } 4615 } else { // not interface 4616 if (has_illegal_visibility(flags)) { 4617 is_illegal = true; 4618 } else { 4619 if (is_initializer) { 4620 if (is_static || is_final || is_synchronized || is_native || 4621 is_abstract || (major_gte_15 && is_bridge)) { 4622 is_illegal = true; 4623 } 4624 } else { // not initializer 4625 if (is_abstract) { 4626 if ((is_final || is_native || is_private || is_static || 4627 (major_gte_15 && (is_synchronized || is_strict)))) { 4628 is_illegal = true; 4629 } 4630 } 4631 } 4632 } 4633 } 4634 4635 if (is_illegal) { 4636 ResourceMark rm(THREAD); 4637 Exceptions::fthrow( 4638 THREAD_AND_LOCATION, 4639 vmSymbols::java_lang_ClassFormatError(), 4640 "Method %s in class %s has illegal modifiers: 0x%X", 4641 name->as_C_string(), _class_name->as_C_string(), flags); 4642 return; 4643 } 4644 } 4645 4646 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4647 int length, 4648 TRAPS) const { 4649 assert(_need_verify, "only called when _need_verify is true"); 4650 int i = 0; 4651 const int count = length >> 2; 4652 for (int k=0; k<count; k++) { 4653 unsigned char b0 = buffer[i]; 4654 unsigned char b1 = buffer[i+1]; 4655 unsigned char b2 = buffer[i+2]; 4656 unsigned char b3 = buffer[i+3]; 4657 // For an unsigned char v, 4658 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; 4659 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. 4660 const unsigned char res = b0 | b0 - 1 | 4661 b1 | b1 - 1 | 4662 b2 | b2 - 1 | 4663 b3 | b3 - 1; 4664 if (res >= 128) break; 4665 i += 4; 4666 } 4667 for(; i < length; i++) { 4668 unsigned short c; 4669 // no embedded zeros 4670 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); 4671 if(buffer[i] < 128) { 4672 continue; 4673 } 4674 if ((i + 5) < length) { // see if it's legal supplementary character 4675 if (UTF8::is_supplementary_character(&buffer[i])) { 4676 c = UTF8::get_supplementary_character(&buffer[i]); 4677 i += 5; 4678 continue; 4679 } 4680 } 4681 switch (buffer[i] >> 4) { 4682 default: break; 4683 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: 4684 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4685 case 0xC: case 0xD: // 110xxxxx 10xxxxxx 4686 c = (buffer[i] & 0x1F) << 6; 4687 i++; 4688 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { 4689 c += buffer[i] & 0x3F; 4690 if (_major_version <= 47 || c == 0 || c >= 0x80) { 4691 // for classes with major > 47, c must a null or a character in its shortest form 4692 break; 4693 } 4694 } 4695 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4696 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx 4697 c = (buffer[i] & 0xF) << 12; 4698 i += 2; 4699 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { 4700 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); 4701 if (_major_version <= 47 || c >= 0x800) { 4702 // for classes with major > 47, c must be in its shortest form 4703 break; 4704 } 4705 } 4706 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4707 } // end of switch 4708 } // end of for 4709 } 4710 4711 // Unqualified names may not contain the characters '.', ';', '[', or '/'. 4712 // Method names also may not contain the characters '<' or '>', unless <init> 4713 // or <clinit>. Note that method names may not be <init> or <clinit> in this 4714 // method. Because these names have been checked as special cases before 4715 // calling this method in verify_legal_method_name. 4716 static bool verify_unqualified_name(const char* name, 4717 unsigned int length, 4718 int type) { 4719 for (const char* p = name; p != name + length;) { 4720 jchar ch = *p; 4721 if (ch < 128) { 4722 p++; 4723 if (ch == '.' || ch == ';' || ch == '[') { 4724 return false; // do not permit '.', ';', or '[' 4725 } 4726 if (type != LegalClass && ch == '/') { 4727 return false; // do not permit '/' unless it's class name 4728 } 4729 if (type == LegalMethod && (ch == '<' || ch == '>')) { 4730 return false; // do not permit '<' or '>' in method names 4731 } 4732 } 4733 else { 4734 char* tmp_p = UTF8::next(p, &ch); 4735 p = tmp_p; 4736 } 4737 } 4738 return true; 4739 } 4740 4741 // Take pointer to a string. Skip over the longest part of the string that could 4742 // be taken as a fieldname. Allow '/' if slash_ok is true. 4743 // Return a pointer to just past the fieldname. 4744 // Return NULL if no fieldname at all was found, or in the case of slash_ok 4745 // being true, we saw consecutive slashes (meaning we were looking for a 4746 // qualified path but found something that was badly-formed). 4747 static const char* skip_over_field_name(const char* name, 4748 bool slash_ok, 4749 unsigned int length) { 4750 const char* p; 4751 jboolean last_is_slash = false; 4752 jboolean not_first_ch = false; 4753 4754 for (p = name; p != name + length; not_first_ch = true) { 4755 const char* old_p = p; 4756 jchar ch = *p; 4757 if (ch < 128) { 4758 p++; 4759 // quick check for ascii 4760 if ((ch >= 'a' && ch <= 'z') || 4761 (ch >= 'A' && ch <= 'Z') || 4762 (ch == '_' || ch == '$') || 4763 (not_first_ch && ch >= '0' && ch <= '9')) { 4764 last_is_slash = false; 4765 continue; 4766 } 4767 if (slash_ok && ch == '/') { 4768 if (last_is_slash) { 4769 return NULL; // Don't permit consecutive slashes 4770 } 4771 last_is_slash = true; 4772 continue; 4773 } 4774 } 4775 else { 4776 jint unicode_ch; 4777 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4778 p = tmp_p; 4779 last_is_slash = false; 4780 // Check if ch is Java identifier start or is Java identifier part 4781 // 4672820: call java.lang.Character methods directly without generating separate tables. 4782 EXCEPTION_MARK; 4783 4784 // return value 4785 JavaValue result(T_BOOLEAN); 4786 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4787 JavaCallArguments args; 4788 args.push_int(unicode_ch); 4789 4790 // public static boolean isJavaIdentifierStart(char ch); 4791 JavaCalls::call_static(&result, 4792 SystemDictionary::Character_klass(), 4793 vmSymbols::isJavaIdentifierStart_name(), 4794 vmSymbols::int_bool_signature(), 4795 &args, 4796 THREAD); 4797 4798 if (HAS_PENDING_EXCEPTION) { 4799 CLEAR_PENDING_EXCEPTION; 4800 return 0; 4801 } 4802 if (result.get_jboolean()) { 4803 continue; 4804 } 4805 4806 if (not_first_ch) { 4807 // public static boolean isJavaIdentifierPart(char ch); 4808 JavaCalls::call_static(&result, 4809 SystemDictionary::Character_klass(), 4810 vmSymbols::isJavaIdentifierPart_name(), 4811 vmSymbols::int_bool_signature(), 4812 &args, 4813 THREAD); 4814 4815 if (HAS_PENDING_EXCEPTION) { 4816 CLEAR_PENDING_EXCEPTION; 4817 return 0; 4818 } 4819 4820 if (result.get_jboolean()) { 4821 continue; 4822 } 4823 } 4824 } 4825 return (not_first_ch) ? old_p : NULL; 4826 } 4827 return (not_first_ch) ? p : NULL; 4828 } 4829 4830 // Take pointer to a string. Skip over the longest part of the string that could 4831 // be taken as a field signature. Allow "void" if void_ok. 4832 // Return a pointer to just past the signature. 4833 // Return NULL if no legal signature is found. 4834 const char* ClassFileParser::skip_over_field_signature(const char* signature, 4835 bool void_ok, 4836 unsigned int length, 4837 TRAPS) const { 4838 unsigned int array_dim = 0; 4839 while (length > 0) { 4840 switch (signature[0]) { 4841 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4842 case JVM_SIGNATURE_BOOLEAN: 4843 case JVM_SIGNATURE_BYTE: 4844 case JVM_SIGNATURE_CHAR: 4845 case JVM_SIGNATURE_SHORT: 4846 case JVM_SIGNATURE_INT: 4847 case JVM_SIGNATURE_FLOAT: 4848 case JVM_SIGNATURE_LONG: 4849 case JVM_SIGNATURE_DOUBLE: 4850 return signature + 1; 4851 case JVM_SIGNATURE_CLASS: { 4852 if (_major_version < JAVA_1_5_VERSION) { 4853 // Skip over the class name if one is there 4854 const char* const p = skip_over_field_name(signature + 1, true, --length); 4855 4856 // The next character better be a semicolon 4857 if (p && (p - signature) > 1 && p[0] == ';') { 4858 return p + 1; 4859 } 4860 } 4861 else { 4862 // 4900761: For class version > 48, any unicode is allowed in class name. 4863 length--; 4864 signature++; 4865 while (length > 0 && signature[0] != ';') { 4866 if (signature[0] == '.') { 4867 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); 4868 } 4869 length--; 4870 signature++; 4871 } 4872 if (signature[0] == ';') { return signature + 1; } 4873 } 4874 4875 return NULL; 4876 } 4877 case JVM_SIGNATURE_ARRAY: 4878 array_dim++; 4879 if (array_dim > 255) { 4880 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4881 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4882 } 4883 // The rest of what's there better be a legal signature 4884 signature++; 4885 length--; 4886 void_ok = false; 4887 break; 4888 4889 default: 4890 return NULL; 4891 } 4892 } 4893 return NULL; 4894 } 4895 4896 // Checks if name is a legal class name. 4897 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4898 if (!_need_verify || _relax_verify) { return; } 4899 4900 char buf[fixed_buffer_size]; 4901 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4902 unsigned int length = name->utf8_length(); 4903 bool legal = false; 4904 4905 if (length > 0) { 4906 const char* p; 4907 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4908 p = skip_over_field_signature(bytes, false, length, CHECK); 4909 legal = (p != NULL) && ((p - bytes) == (int)length); 4910 } else if (_major_version < JAVA_1_5_VERSION) { 4911 if (bytes[0] != '<') { 4912 p = skip_over_field_name(bytes, true, length); 4913 legal = (p != NULL) && ((p - bytes) == (int)length); 4914 } 4915 } else { 4916 // 4900761: relax the constraints based on JSR202 spec 4917 // Class names may be drawn from the entire Unicode character set. 4918 // Identifiers between '/' must be unqualified names. 4919 // The utf8 string has been verified when parsing cpool entries. 4920 legal = verify_unqualified_name(bytes, length, LegalClass); 4921 } 4922 } 4923 if (!legal) { 4924 ResourceMark rm(THREAD); 4925 assert(_class_name != NULL, "invariant"); 4926 Exceptions::fthrow( 4927 THREAD_AND_LOCATION, 4928 vmSymbols::java_lang_ClassFormatError(), 4929 "Illegal class name \"%s\" in class file %s", bytes, 4930 _class_name->as_C_string() 4931 ); 4932 return; 4933 } 4934 } 4935 4936 // Checks if name is a legal field name. 4937 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 4938 if (!_need_verify || _relax_verify) { return; } 4939 4940 char buf[fixed_buffer_size]; 4941 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4942 unsigned int length = name->utf8_length(); 4943 bool legal = false; 4944 4945 if (length > 0) { 4946 if (_major_version < JAVA_1_5_VERSION) { 4947 if (bytes[0] != '<') { 4948 const char* p = skip_over_field_name(bytes, false, length); 4949 legal = (p != NULL) && ((p - bytes) == (int)length); 4950 } 4951 } else { 4952 // 4881221: relax the constraints based on JSR202 spec 4953 legal = verify_unqualified_name(bytes, length, LegalField); 4954 } 4955 } 4956 4957 if (!legal) { 4958 ResourceMark rm(THREAD); 4959 assert(_class_name != NULL, "invariant"); 4960 Exceptions::fthrow( 4961 THREAD_AND_LOCATION, 4962 vmSymbols::java_lang_ClassFormatError(), 4963 "Illegal field name \"%s\" in class %s", bytes, 4964 _class_name->as_C_string() 4965 ); 4966 return; 4967 } 4968 } 4969 4970 // Checks if name is a legal method name. 4971 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 4972 if (!_need_verify || _relax_verify) { return; } 4973 4974 assert(name != NULL, "method name is null"); 4975 char buf[fixed_buffer_size]; 4976 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4977 unsigned int length = name->utf8_length(); 4978 bool legal = false; 4979 4980 if (length > 0) { 4981 if (bytes[0] == '<') { 4982 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 4983 legal = true; 4984 } 4985 } else if (_major_version < JAVA_1_5_VERSION) { 4986 const char* p; 4987 p = skip_over_field_name(bytes, false, length); 4988 legal = (p != NULL) && ((p - bytes) == (int)length); 4989 } else { 4990 // 4881221: relax the constraints based on JSR202 spec 4991 legal = verify_unqualified_name(bytes, length, LegalMethod); 4992 } 4993 } 4994 4995 if (!legal) { 4996 ResourceMark rm(THREAD); 4997 assert(_class_name != NULL, "invariant"); 4998 Exceptions::fthrow( 4999 THREAD_AND_LOCATION, 5000 vmSymbols::java_lang_ClassFormatError(), 5001 "Illegal method name \"%s\" in class %s", bytes, 5002 _class_name->as_C_string() 5003 ); 5004 return; 5005 } 5006 } 5007 5008 5009 // Checks if signature is a legal field signature. 5010 void ClassFileParser::verify_legal_field_signature(const Symbol* name, 5011 const Symbol* signature, 5012 TRAPS) const { 5013 if (!_need_verify) { return; } 5014 5015 char buf[fixed_buffer_size]; 5016 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5017 const unsigned int length = signature->utf8_length(); 5018 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5019 5020 if (p == NULL || (p - bytes) != (int)length) { 5021 throwIllegalSignature("Field", name, signature, CHECK); 5022 } 5023 } 5024 5025 // Checks if signature is a legal method signature. 5026 // Returns number of parameters 5027 int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5028 const Symbol* signature, 5029 TRAPS) const { 5030 if (!_need_verify) { 5031 // make sure caller's args_size will be less than 0 even for non-static 5032 // method so it will be recomputed in compute_size_of_parameters(). 5033 return -2; 5034 } 5035 5036 // Class initializers cannot have args for class format version >= 51. 5037 if (name == vmSymbols::class_initializer_name() && 5038 signature != vmSymbols::void_method_signature() && 5039 _major_version >= JAVA_7_VERSION) { 5040 throwIllegalSignature("Method", name, signature, CHECK_0); 5041 return 0; 5042 } 5043 5044 unsigned int args_size = 0; 5045 char buf[fixed_buffer_size]; 5046 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5047 unsigned int length = signature->utf8_length(); 5048 const char* nextp; 5049 5050 // The first character must be a '(' 5051 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5052 length--; 5053 // Skip over legal field signatures 5054 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5055 while ((length > 0) && (nextp != NULL)) { 5056 args_size++; 5057 if (p[0] == 'J' || p[0] == 'D') { 5058 args_size++; 5059 } 5060 length -= nextp - p; 5061 p = nextp; 5062 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5063 } 5064 // The first non-signature thing better be a ')' 5065 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5066 length--; 5067 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5068 // All internal methods must return void 5069 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5070 return args_size; 5071 } 5072 } else { 5073 // Now we better just have a return value 5074 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5075 if (nextp && ((int)length == (nextp - p))) { 5076 return args_size; 5077 } 5078 } 5079 } 5080 } 5081 // Report error 5082 throwIllegalSignature("Method", name, signature, CHECK_0); 5083 return 0; 5084 } 5085 5086 int ClassFileParser::static_field_size() const { 5087 assert(_field_info != NULL, "invariant"); 5088 return _field_info->static_field_size; 5089 } 5090 5091 int ClassFileParser::total_oop_map_count() const { 5092 assert(_field_info != NULL, "invariant"); 5093 return _field_info->total_oop_map_count; 5094 } 5095 5096 jint ClassFileParser::layout_size() const { 5097 assert(_field_info != NULL, "invariant"); 5098 return _field_info->instance_size; 5099 } 5100 5101 static void check_methods_for_intrinsics(const InstanceKlass* ik, 5102 const Array<Method*>* methods) { 5103 assert(ik != NULL, "invariant"); 5104 assert(methods != NULL, "invariant"); 5105 5106 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5107 // (We used to do this lazily, but now we query it in Rewriter, 5108 // which is eagerly done for every method, so we might as well do it now, 5109 // when everything is fresh in memory.) 5110 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5111 5112 if (klass_id != vmSymbols::NO_SID) { 5113 for (int j = 0; j < methods->length(); ++j) { 5114 Method* method = methods->at(j); 5115 method->init_intrinsic_id(); 5116 5117 if (CheckIntrinsics) { 5118 // Check if an intrinsic is defined for method 'method', 5119 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5120 if (method->intrinsic_id() != vmIntrinsics::_none && 5121 !method->intrinsic_candidate()) { 5122 tty->print("Compiler intrinsic is defined for method [%s], " 5123 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5124 method->name_and_sig_as_C_string(), 5125 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5126 ); 5127 tty->cr(); 5128 DEBUG_ONLY(vm_exit(1)); 5129 } 5130 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5131 // but there is no intrinsic available for it. 5132 if (method->intrinsic_candidate() && 5133 method->intrinsic_id() == vmIntrinsics::_none) { 5134 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5135 "but no compiler intrinsic is defined for the method.%s", 5136 method->name_and_sig_as_C_string(), 5137 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5138 ); 5139 tty->cr(); 5140 DEBUG_ONLY(vm_exit(1)); 5141 } 5142 } 5143 } // end for 5144 5145 #ifdef ASSERT 5146 if (CheckIntrinsics) { 5147 // Check for orphan methods in the current class. A method m 5148 // of a class C is orphan if an intrinsic is defined for method m, 5149 // but class C does not declare m. 5150 // The check is potentially expensive, therefore it is available 5151 // only in debug builds. 5152 5153 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5154 if (vmIntrinsics::_compiledLambdaForm == id) { 5155 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5156 // generated for the JVM from a LambdaForm and therefore no method 5157 // is defined for it. 5158 continue; 5159 } 5160 5161 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5162 // Check if the current class contains a method with the same 5163 // name, flags, signature. 5164 bool match = false; 5165 for (int j = 0; j < methods->length(); ++j) { 5166 const Method* method = methods->at(j); 5167 if (method->intrinsic_id() == id) { 5168 match = true; 5169 break; 5170 } 5171 } 5172 5173 if (!match) { 5174 char buf[1000]; 5175 tty->print("Compiler intrinsic is defined for method [%s], " 5176 "but the method is not available in class [%s].%s", 5177 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5178 buf, sizeof(buf)), 5179 ik->name()->as_C_string(), 5180 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5181 ); 5182 tty->cr(); 5183 DEBUG_ONLY(vm_exit(1)); 5184 } 5185 } 5186 } // end for 5187 } // CheckIntrinsics 5188 #endif // ASSERT 5189 } 5190 } 5191 5192 InstanceKlass* ClassFileParser::create_instance_klass(TRAPS) { 5193 if (_klass != NULL) { 5194 return _klass; 5195 } 5196 5197 InstanceKlass* const ik = 5198 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5199 5200 fill_instance_klass(ik, CHECK_NULL); 5201 5202 assert(_klass == ik, "invariant"); 5203 5204 return ik; 5205 } 5206 5207 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, TRAPS) { 5208 assert(ik != NULL, "invariant"); 5209 5210 set_klass_to_deallocate(ik); 5211 5212 assert(_field_info != NULL, "invariant"); 5213 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5214 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5215 "sanity"); 5216 5217 assert(ik->is_instance_klass(), "sanity"); 5218 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5219 5220 // Fill in information already parsed 5221 ik->set_should_verify_class(_need_verify); 5222 5223 // Not yet: supers are done below to support the new subtype-checking fields 5224 ik->set_class_loader_data(_loader_data); 5225 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5226 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5227 assert(_fac != NULL, "invariant"); 5228 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5229 5230 // this transfers ownership of a lot of arrays from 5231 // the parser onto the InstanceKlass* 5232 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5233 5234 // note that is not safe to use the fields in the parser from this point on 5235 assert(NULL == _cp, "invariant"); 5236 assert(NULL == _fields, "invariant"); 5237 assert(NULL == _methods, "invariant"); 5238 assert(NULL == _inner_classes, "invariant"); 5239 assert(NULL == _local_interfaces, "invariant"); 5240 assert(NULL == _transitive_interfaces, "invariant"); 5241 assert(NULL == _combined_annotations, "invariant"); 5242 5243 if (_has_final_method) { 5244 ik->set_has_final_method(); 5245 } 5246 5247 ik->copy_method_ordering(_method_ordering, CHECK); 5248 // The InstanceKlass::_methods_jmethod_ids cache 5249 // is managed on the assumption that the initial cache 5250 // size is equal to the number of methods in the class. If 5251 // that changes, then InstanceKlass::idnum_can_increment() 5252 // has to be changed accordingly. 5253 ik->set_initial_method_idnum(ik->methods()->length()); 5254 5255 ik->set_name(_class_name); 5256 5257 if (is_anonymous()) { 5258 // I am well known to myself 5259 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve 5260 } 5261 5262 ik->set_minor_version(_minor_version); 5263 ik->set_major_version(_major_version); 5264 ik->set_has_default_methods(_has_default_methods); 5265 ik->set_declares_default_methods(_declares_default_methods); 5266 5267 if (_host_klass != NULL) { 5268 assert (ik->is_anonymous(), "should be the same"); 5269 ik->set_host_klass(_host_klass); 5270 } 5271 5272 const Array<Method*>* const methods = ik->methods(); 5273 assert(methods != NULL, "invariant"); 5274 const int methods_len = methods->length(); 5275 5276 check_methods_for_intrinsics(ik, methods); 5277 5278 // Fill in field values obtained by parse_classfile_attributes 5279 if (_parsed_annotations->has_any_annotations()) { 5280 _parsed_annotations->apply_to(ik); 5281 } 5282 5283 apply_parsed_class_attributes(ik); 5284 5285 // Miranda methods 5286 if ((_num_miranda_methods > 0) || 5287 // if this class introduced new miranda methods or 5288 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5289 // super class exists and this class inherited miranda methods 5290 ) { 5291 ik->set_has_miranda_methods(); // then set a flag 5292 } 5293 5294 // Fill in information needed to compute superclasses. 5295 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5296 5297 // Initialize itable offset tables 5298 klassItable::setup_itable_offset_table(ik); 5299 5300 // Compute transitive closure of interfaces this class implements 5301 // Do final class setup 5302 fill_oop_maps(ik, 5303 _field_info->nonstatic_oop_map_count, 5304 _field_info->nonstatic_oop_offsets, 5305 _field_info->nonstatic_oop_counts); 5306 5307 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5308 set_precomputed_flags(ik); 5309 5310 // check if this class can access its super class 5311 check_super_class_access(ik, CHECK); 5312 5313 // check if this class can access its superinterfaces 5314 check_super_interface_access(ik, CHECK); 5315 5316 // check if this class overrides any final method 5317 check_final_method_override(ik, CHECK); 5318 5319 // check that if this class is an interface then it doesn't have static methods 5320 if (ik->is_interface()) { 5321 /* An interface in a JAVA 8 classfile can be static */ 5322 if (_major_version < JAVA_8_VERSION) { 5323 check_illegal_static_method(ik, CHECK); 5324 } 5325 } 5326 5327 // Allocate mirror and initialize static fields 5328 // The create_mirror() call will also call compute_modifiers() 5329 java_lang_Class::create_mirror(ik, 5330 _loader_data->class_loader(), 5331 _protection_domain, 5332 CHECK); 5333 5334 assert(_all_mirandas != NULL, "invariant"); 5335 5336 // Generate any default methods - default methods are interface methods 5337 // that have a default implementation. This is new with Lambda project. 5338 if (_has_default_methods ) { 5339 DefaultMethods::generate_default_methods(ik, 5340 _all_mirandas, 5341 CHECK); 5342 } 5343 5344 // Update the loader_data graph. 5345 record_defined_class_dependencies(ik, CHECK); 5346 5347 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5348 5349 if (!is_internal()) { 5350 if (TraceClassLoading) { 5351 ResourceMark rm; 5352 // print in a single call to reduce interleaving of output 5353 if (_stream->source() != NULL) { 5354 tty->print("[Loaded %s from %s]\n", 5355 ik->external_name(), 5356 _stream->source()); 5357 } else if (_loader_data->class_loader() == NULL) { 5358 const Klass* const caller = 5359 THREAD->is_Java_thread() 5360 ? ((JavaThread*)THREAD)->security_get_caller_class(1) 5361 : NULL; 5362 // caller can be NULL, for example, during a JVMTI VM_Init hook 5363 if (caller != NULL) { 5364 tty->print("[Loaded %s by instance of %s]\n", 5365 ik->external_name(), 5366 caller->external_name()); 5367 } else { 5368 tty->print("[Loaded %s]\n", ik->external_name()); 5369 } 5370 } else { 5371 tty->print("[Loaded %s from %s]\n", ik->external_name(), 5372 _loader_data->class_loader()->klass()->external_name()); 5373 } 5374 } 5375 5376 if (log_is_enabled(Info, classresolve)) { 5377 ResourceMark rm; 5378 // print out the superclass. 5379 const char * from = ik->external_name(); 5380 if (ik->java_super() != NULL) { 5381 log_info(classresolve)("%s %s (super)", 5382 from, 5383 ik->java_super()->external_name()); 5384 } 5385 // print out each of the interface classes referred to by this class. 5386 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5387 if (local_interfaces != NULL) { 5388 const int length = local_interfaces->length(); 5389 for (int i = 0; i < length; i++) { 5390 const Klass* const k = local_interfaces->at(i); 5391 const char * to = k->external_name(); 5392 log_info(classresolve)("%s %s (interface)", from, to); 5393 } 5394 } 5395 } 5396 } 5397 5398 TRACE_INIT_ID(ik); 5399 5400 // If we reach here, all is well. 5401 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5402 // in order for it to not be destroyed in the ClassFileParser destructor. 5403 set_klass_to_deallocate(NULL); 5404 5405 // it's official 5406 set_klass(ik); 5407 5408 debug_only(ik->verify();) 5409 } 5410 5411 ClassFileParser::ClassFileParser(ClassFileStream* stream, 5412 Symbol* name, 5413 ClassLoaderData* loader_data, 5414 Handle protection_domain, 5415 TempNewSymbol* parsed_name, 5416 const Klass* host_klass, 5417 GrowableArray<Handle>* cp_patches, 5418 Publicity pub_level, 5419 TRAPS) : 5420 _stream(stream), 5421 _requested_name(name), 5422 _loader_data(loader_data), 5423 _host_klass(host_klass), 5424 _cp_patches(cp_patches), 5425 _parsed_name(parsed_name), 5426 _super_klass(), 5427 _cp(NULL), 5428 _fields(NULL), 5429 _methods(NULL), 5430 _inner_classes(NULL), 5431 _local_interfaces(NULL), 5432 _transitive_interfaces(NULL), 5433 _combined_annotations(NULL), 5434 _annotations(NULL), 5435 _type_annotations(NULL), 5436 _fields_annotations(NULL), 5437 _fields_type_annotations(NULL), 5438 _klass(NULL), 5439 _klass_to_deallocate(NULL), 5440 _parsed_annotations(NULL), 5441 _fac(NULL), 5442 _field_info(NULL), 5443 _method_ordering(NULL), 5444 _all_mirandas(NULL), 5445 _vtable_size(0), 5446 _itable_size(0), 5447 _num_miranda_methods(0), 5448 _rt(REF_NONE), 5449 _protection_domain(protection_domain), 5450 _access_flags(), 5451 _pub_level(pub_level), 5452 _synthetic_flag(false), 5453 _sde_length(false), 5454 _sde_buffer(NULL), 5455 _sourcefile_index(0), 5456 _generic_signature_index(0), 5457 _major_version(0), 5458 _minor_version(0), 5459 _this_class_index(0), 5460 _super_class_index(0), 5461 _itfs_len(0), 5462 _java_fields_count(0), 5463 _need_verify(false), 5464 _relax_verify(false), 5465 _has_default_methods(false), 5466 _declares_default_methods(false), 5467 _has_final_method(false), 5468 _has_finalizer(false), 5469 _has_empty_finalizer(false), 5470 _has_vanilla_constructor(false), 5471 _max_bootstrap_specifier_index(-1) { 5472 5473 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5474 5475 assert(THREAD->is_Java_thread(), "invariant"); 5476 assert(_loader_data != NULL, "invariant"); 5477 assert(stream != NULL, "invariant"); 5478 assert(_stream != NULL, "invariant"); 5479 assert(_stream->buffer() == _stream->current(), "invariant"); 5480 assert(_class_name != NULL, "invariant"); 5481 assert(0 == _access_flags.as_int(), "invariant"); 5482 5483 // Figure out whether we can skip format checking (matching classic VM behavior) 5484 if (DumpSharedSpaces) { 5485 // verify == true means it's a 'remote' class (i.e., non-boot class) 5486 // Verification decision is based on BytecodeVerificationRemote flag 5487 // for those classes. 5488 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5489 BytecodeVerificationLocal; 5490 } 5491 else { 5492 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5493 stream->need_verify()); 5494 } 5495 5496 // synch back verification state to stream 5497 stream->set_verify(_need_verify); 5498 5499 // Check if verification needs to be relaxed for this class file 5500 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5501 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader()); 5502 5503 parse_stream(stream, CHECK); 5504 5505 post_process_parsed_stream(stream, _cp, CHECK); 5506 } 5507 5508 void ClassFileParser::clear_class_metadata() { 5509 // metadata created before the instance klass is created. Must be 5510 // deallocated if classfile parsing returns an error. 5511 _cp = NULL; 5512 _fields = NULL; 5513 _methods = NULL; 5514 _inner_classes = NULL; 5515 _local_interfaces = NULL; 5516 _transitive_interfaces = NULL; 5517 _combined_annotations = NULL; 5518 _annotations = _type_annotations = NULL; 5519 _fields_annotations = _fields_type_annotations = NULL; 5520 } 5521 5522 // Destructor to clean up 5523 ClassFileParser::~ClassFileParser() { 5524 if (_cp != NULL) { 5525 MetadataFactory::free_metadata(_loader_data, _cp); 5526 } 5527 if (_fields != NULL) { 5528 MetadataFactory::free_array<u2>(_loader_data, _fields); 5529 } 5530 5531 if (_methods != NULL) { 5532 // Free methods 5533 InstanceKlass::deallocate_methods(_loader_data, _methods); 5534 } 5535 5536 // beware of the Universe::empty_blah_array!! 5537 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5538 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5539 } 5540 5541 // Free interfaces 5542 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5543 _local_interfaces, _transitive_interfaces); 5544 5545 if (_combined_annotations != NULL) { 5546 // After all annotations arrays have been created, they are installed into the 5547 // Annotations object that will be assigned to the InstanceKlass being created. 5548 5549 // Deallocate the Annotations object and the installed annotations arrays. 5550 _combined_annotations->deallocate_contents(_loader_data); 5551 5552 // If the _combined_annotations pointer is non-NULL, 5553 // then the other annotations fields should have been cleared. 5554 assert(_annotations == NULL, "Should have been cleared"); 5555 assert(_type_annotations == NULL, "Should have been cleared"); 5556 assert(_fields_annotations == NULL, "Should have been cleared"); 5557 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5558 } else { 5559 // If the annotations arrays were not installed into the Annotations object, 5560 // then they have to be deallocated explicitly. 5561 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5562 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5563 Annotations::free_contents(_loader_data, _fields_annotations); 5564 Annotations::free_contents(_loader_data, _fields_type_annotations); 5565 } 5566 5567 clear_class_metadata(); 5568 5569 // deallocate the klass if already created. Don't directly deallocate, but add 5570 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5571 // at a safepoint. 5572 if (_klass_to_deallocate != NULL) { 5573 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5574 } 5575 } 5576 5577 void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5578 TRAPS) { 5579 5580 assert(stream != NULL, "invariant"); 5581 assert(_class_name != NULL, "invariant"); 5582 5583 // BEGIN STREAM PARSING 5584 stream->guarantee_more(8, CHECK); // magic, major, minor 5585 // Magic value 5586 const u4 magic = stream->get_u4_fast(); 5587 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5588 "Incompatible magic value %u in class file %s", 5589 magic, CHECK); 5590 5591 // Version numbers 5592 _minor_version = stream->get_u2_fast(); 5593 _major_version = stream->get_u2_fast(); 5594 5595 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5596 ResourceMark rm; 5597 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5598 _major_version, _minor_version, _class_name->as_C_string()); 5599 Exceptions::fthrow( 5600 THREAD_AND_LOCATION, 5601 vmSymbols::java_lang_UnsupportedClassVersionError(), 5602 "Unsupported major.minor version for dump time %u.%u", 5603 _major_version, 5604 _minor_version); 5605 } 5606 5607 // Check version numbers - we check this even with verifier off 5608 if (!is_supported_version(_major_version, _minor_version)) { 5609 ResourceMark rm(THREAD); 5610 Exceptions::fthrow( 5611 THREAD_AND_LOCATION, 5612 vmSymbols::java_lang_UnsupportedClassVersionError(), 5613 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5614 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5615 _class_name->as_C_string(), 5616 _major_version, 5617 _minor_version, 5618 JAVA_MAX_SUPPORTED_VERSION, 5619 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5620 return; 5621 } 5622 5623 stream->guarantee_more(3, CHECK); // length, first cp tag 5624 const u2 cp_size = stream->get_u2_fast(); 5625 5626 guarantee_property( 5627 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5628 cp_size, CHECK); 5629 5630 _cp = ConstantPool::allocate(_loader_data, 5631 cp_size, 5632 CHECK); 5633 5634 ConstantPool* const cp = _cp; 5635 5636 parse_constant_pool(stream, cp, cp_size, CHECK); 5637 5638 assert(cp_size == (const u2)cp->length(), "invariant"); 5639 5640 // ACCESS FLAGS 5641 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5642 5643 // Access flags 5644 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5645 5646 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5647 // Set abstract bit for old class files for backward compatibility 5648 flags |= JVM_ACC_ABSTRACT; 5649 } 5650 5651 _access_flags.set_flags(flags); 5652 5653 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK); 5654 5655 // This class and superclass 5656 _this_class_index = stream->get_u2_fast(); 5657 check_property( 5658 valid_cp_range(_this_class_index, cp_size) && 5659 cp->tag_at(_this_class_index).is_unresolved_klass(), 5660 "Invalid this class index %u in constant pool in class file %s", 5661 _this_class_index, CHECK); 5662 5663 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5664 assert(class_name_in_cp != NULL, "class_name can't be null"); 5665 5666 if (_parsed_name != NULL) { 5667 // It's important to set parsed_name *before* resolving the super class. 5668 // (it's used for cleanup by the caller if parsing fails) 5669 *_parsed_name = class_name_in_cp; 5670 // parsed_name is returned and can be used if there's an error, so add to 5671 // its reference count. Caller will decrement the refcount. 5672 (*_parsed_name)->increment_refcount(); 5673 } 5674 5675 // Update _class_name which could be null previously 5676 // to reflect the name in the constant pool 5677 _class_name = class_name_in_cp; 5678 5679 // Don't need to check whether this class name is legal or not. 5680 // It has been checked when constant pool is parsed. 5681 // However, make sure it is not an array type. 5682 if (_need_verify) { 5683 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5684 "Bad class name in class file %s", 5685 CHECK); 5686 } 5687 5688 // Checks if name in class file matches requested name 5689 if (_requested_name != NULL && _requested_name != _class_name) { 5690 ResourceMark rm(THREAD); 5691 Exceptions::fthrow( 5692 THREAD_AND_LOCATION, 5693 vmSymbols::java_lang_NoClassDefFoundError(), 5694 "%s (wrong name: %s)", 5695 _class_name->as_C_string(), 5696 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5697 ); 5698 return; 5699 } 5700 5701 if (!is_internal()) { 5702 if (TraceClassLoadingPreorder) { 5703 tty->print("[Loading %s", 5704 _class_name->as_klass_external_name()); 5705 5706 if (stream->source() != NULL) { 5707 tty->print(" from %s", stream->source()); 5708 } 5709 tty->print_cr("]"); 5710 } 5711 #if INCLUDE_CDS 5712 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5713 // Only dump the classes that can be stored into CDS archive 5714 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) { 5715 ResourceMark rm(THREAD); 5716 classlist_file->print_cr("%s", _class_name->as_C_string()); 5717 classlist_file->flush(); 5718 } 5719 } 5720 #endif 5721 } 5722 5723 // SUPERKLASS 5724 _super_class_index = stream->get_u2_fast(); 5725 _super_klass = parse_super_class(cp, 5726 _super_class_index, 5727 _need_verify, 5728 CHECK); 5729 5730 // Interfaces 5731 _itfs_len = stream->get_u2_fast(); 5732 parse_interfaces(stream, 5733 _itfs_len, 5734 cp, 5735 &_has_default_methods, 5736 CHECK); 5737 5738 assert(_local_interfaces != NULL, "invariant"); 5739 5740 // Fields (offsets are filled in later) 5741 _fac = new FieldAllocationCount(); 5742 parse_fields(stream, 5743 _access_flags.is_interface(), 5744 _fac, 5745 cp, 5746 cp_size, 5747 &_java_fields_count, 5748 CHECK); 5749 5750 assert(_fields != NULL, "invariant"); 5751 5752 // Methods 5753 AccessFlags promoted_flags; 5754 parse_methods(stream, 5755 _access_flags.is_interface(), 5756 &promoted_flags, 5757 &_has_final_method, 5758 &_declares_default_methods, 5759 CHECK); 5760 5761 assert(_methods != NULL, "invariant"); 5762 5763 // promote flags from parse_methods() to the klass' flags 5764 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5765 5766 if (_declares_default_methods) { 5767 _has_default_methods = true; 5768 } 5769 5770 // Additional attributes/annotations 5771 _parsed_annotations = new ClassAnnotationCollector(); 5772 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 5773 5774 assert(_inner_classes != NULL, "invariant"); 5775 5776 // Finalize the Annotations metadata object, 5777 // now that all annotation arrays have been created. 5778 create_combined_annotations(CHECK); 5779 5780 // Make sure this is the end of class file stream 5781 guarantee_property(stream->at_eos(), 5782 "Extra bytes at the end of class file %s", 5783 CHECK); 5784 5785 // all bytes in stream read and parsed 5786 } 5787 5788 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 5789 ConstantPool* cp, 5790 TRAPS) { 5791 assert(stream != NULL, "invariant"); 5792 assert(stream->at_eos(), "invariant"); 5793 assert(cp != NULL, "invariant"); 5794 assert(_loader_data != NULL, "invariant"); 5795 5796 // We check super class after class file is parsed and format is checked 5797 if (_super_class_index > 0 && NULL ==_super_klass) { 5798 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 5799 if (_access_flags.is_interface()) { 5800 // Before attempting to resolve the superclass, check for class format 5801 // errors not checked yet. 5802 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 5803 "Interfaces must have java.lang.Object as superclass in class file %s", 5804 CHECK); 5805 } 5806 _super_klass = (const InstanceKlass*) 5807 SystemDictionary::resolve_super_or_fail(_class_name, 5808 super_class_name, 5809 _loader_data->class_loader(), 5810 _protection_domain, 5811 true, 5812 CHECK); 5813 } 5814 5815 if (_super_klass != NULL) { 5816 if (_super_klass->has_default_methods()) { 5817 _has_default_methods = true; 5818 } 5819 5820 if (_super_klass->is_interface()) { 5821 ResourceMark rm(THREAD); 5822 Exceptions::fthrow( 5823 THREAD_AND_LOCATION, 5824 vmSymbols::java_lang_IncompatibleClassChangeError(), 5825 "class %s has interface %s as super class", 5826 _class_name->as_klass_external_name(), 5827 _super_klass->external_name() 5828 ); 5829 return; 5830 } 5831 // Make sure super class is not final 5832 if (_super_klass->is_final()) { 5833 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 5834 } 5835 } 5836 5837 // Compute the transitive list of all unique interfaces implemented by this class 5838 _transitive_interfaces = 5839 compute_transitive_interfaces(_super_klass, 5840 _local_interfaces, 5841 _loader_data, 5842 CHECK); 5843 5844 assert(_transitive_interfaces != NULL, "invariant"); 5845 5846 // sort methods 5847 _method_ordering = sort_methods(_methods); 5848 5849 _all_mirandas = new GrowableArray<Method*>(20); 5850 5851 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 5852 &_num_miranda_methods, 5853 _all_mirandas, 5854 _super_klass, 5855 _methods, 5856 _access_flags, 5857 _loader_data->class_loader(), 5858 _class_name, 5859 _local_interfaces, 5860 CHECK); 5861 5862 // Size of Java itable (in words) 5863 _itable_size = _access_flags.is_interface() ? 0 : 5864 klassItable::compute_itable_size(_transitive_interfaces); 5865 5866 assert(_fac != NULL, "invariant"); 5867 assert(_parsed_annotations != NULL, "invariant"); 5868 5869 _field_info = new FieldLayoutInfo(); 5870 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 5871 5872 // Compute reference typ 5873 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 5874 5875 } 5876 5877 void ClassFileParser::set_klass(InstanceKlass* klass) { 5878 5879 #ifdef ASSERT 5880 if (klass != NULL) { 5881 assert(NULL == _klass, "leaking?"); 5882 } 5883 #endif 5884 5885 _klass = klass; 5886 } 5887 5888 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 5889 5890 #ifdef ASSERT 5891 if (klass != NULL) { 5892 assert(NULL == _klass_to_deallocate, "leaking?"); 5893 } 5894 #endif 5895 5896 _klass_to_deallocate = klass; 5897 } 5898 5899 // Caller responsible for ResourceMark 5900 // clone stream with rewound position 5901 const ClassFileStream* ClassFileParser::clone_stream() const { 5902 assert(_stream != NULL, "invariant"); 5903 5904 return _stream->clone(); 5905 }