1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 #include "precompiled.hpp" 25 #include "classfile/classFileParser.hpp" 26 #include "classfile/classFileStream.hpp" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/classLoaderData.inline.hpp" 29 #include "classfile/defaultMethods.hpp" 30 #include "classfile/javaClasses.inline.hpp" 31 #include "classfile/moduleEntry.hpp" 32 #include "classfile/symbolTable.hpp" 33 #include "classfile/systemDictionary.hpp" 34 #include "classfile/verificationType.hpp" 35 #include "classfile/verifier.hpp" 36 #include "classfile/vmSymbols.hpp" 37 #include "gc/shared/gcLocker.hpp" 38 #include "logging/log.hpp" 39 #include "memory/allocation.hpp" 40 #include "memory/metadataFactory.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/annotations.hpp" 45 #include "oops/fieldStreams.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/instanceMirrorKlass.hpp" 48 #include "oops/klass.inline.hpp" 49 #include "oops/klassVtable.hpp" 50 #include "oops/metadata.hpp" 51 #include "oops/method.hpp" 52 #include "oops/oop.inline.hpp" 53 #include "oops/symbol.hpp" 54 #include "prims/jvm.h" 55 #include "prims/jvmtiExport.hpp" 56 #include "prims/jvmtiThreadState.hpp" 57 #include "runtime/javaCalls.hpp" 58 #include "runtime/perfData.hpp" 59 #include "runtime/reflection.hpp" 60 #include "runtime/signature.hpp" 61 #include "runtime/timer.hpp" 62 #include "services/classLoadingService.hpp" 63 #include "services/threadService.hpp" 64 #include "trace/traceMacros.hpp" 65 #include "utilities/array.hpp" 66 #include "utilities/exceptions.hpp" 67 #include "utilities/globalDefinitions.hpp" 68 #include "utilities/macros.hpp" 69 #include "utilities/ostream.hpp" 70 #include "utilities/resourceHash.hpp" 71 #if INCLUDE_CDS 72 #include "classfile/systemDictionaryShared.hpp" 73 #endif 74 75 // We generally try to create the oops directly when parsing, rather than 76 // allocating temporary data structures and copying the bytes twice. A 77 // temporary area is only needed when parsing utf8 entries in the constant 78 // pool and when parsing line number tables. 79 80 // We add assert in debug mode when class format is not checked. 81 82 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 83 #define JAVA_MIN_SUPPORTED_VERSION 45 84 #define JAVA_MAX_SUPPORTED_VERSION 53 85 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 86 87 // Used for two backward compatibility reasons: 88 // - to check for new additions to the class file format in JDK1.5 89 // - to check for bug fixes in the format checker in JDK1.5 90 #define JAVA_1_5_VERSION 49 91 92 // Used for backward compatibility reasons: 93 // - to check for javac bug fixes that happened after 1.5 94 // - also used as the max version when running in jdk6 95 #define JAVA_6_VERSION 50 96 97 // Used for backward compatibility reasons: 98 // - to check NameAndType_info signatures more aggressively 99 // - to disallow argument and require ACC_STATIC for <clinit> methods 100 #define JAVA_7_VERSION 51 101 102 // Extension method support. 103 #define JAVA_8_VERSION 52 104 105 #define JAVA_9_VERSION 53 106 107 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 108 ConstantPool* cp, 109 const int length, 110 TRAPS) { 111 assert(stream != NULL, "invariant"); 112 assert(cp != NULL, "invariant"); 113 114 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 115 // this function (_current can be allocated in a register, with scalar 116 // replacement of aggregates). The _current pointer is copied back to 117 // stream() when this function returns. DON'T call another method within 118 // this method that uses stream(). 119 const ClassFileStream cfs1 = *stream; 120 const ClassFileStream* const cfs = &cfs1; 121 122 assert(cfs->allocated_on_stack(), "should be local"); 123 debug_only(const u1* const old_current = stream->current();) 124 125 // Used for batching symbol allocations. 126 const char* names[SymbolTable::symbol_alloc_batch_size]; 127 int lengths[SymbolTable::symbol_alloc_batch_size]; 128 int indices[SymbolTable::symbol_alloc_batch_size]; 129 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 130 int names_count = 0; 131 132 // parsing Index 0 is unused 133 for (int index = 1; index < length; index++) { 134 // Each of the following case guarantees one more byte in the stream 135 // for the following tag or the access_flags following constant pool, 136 // so we don't need bounds-check for reading tag. 137 const u1 tag = cfs->get_u1_fast(); 138 switch (tag) { 139 case JVM_CONSTANT_Class : { 140 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 141 const u2 name_index = cfs->get_u2_fast(); 142 cp->klass_index_at_put(index, name_index); 143 break; 144 } 145 case JVM_CONSTANT_Fieldref: { 146 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 147 const u2 class_index = cfs->get_u2_fast(); 148 const u2 name_and_type_index = cfs->get_u2_fast(); 149 cp->field_at_put(index, class_index, name_and_type_index); 150 break; 151 } 152 case JVM_CONSTANT_Methodref: { 153 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 154 const u2 class_index = cfs->get_u2_fast(); 155 const u2 name_and_type_index = cfs->get_u2_fast(); 156 cp->method_at_put(index, class_index, name_and_type_index); 157 break; 158 } 159 case JVM_CONSTANT_InterfaceMethodref: { 160 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 161 const u2 class_index = cfs->get_u2_fast(); 162 const u2 name_and_type_index = cfs->get_u2_fast(); 163 cp->interface_method_at_put(index, class_index, name_and_type_index); 164 break; 165 } 166 case JVM_CONSTANT_String : { 167 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 168 const u2 string_index = cfs->get_u2_fast(); 169 cp->string_index_at_put(index, string_index); 170 break; 171 } 172 case JVM_CONSTANT_MethodHandle : 173 case JVM_CONSTANT_MethodType: { 174 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 175 classfile_parse_error( 176 "Class file version does not support constant tag %u in class file %s", 177 tag, CHECK); 178 } 179 if (tag == JVM_CONSTANT_MethodHandle) { 180 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 181 const u1 ref_kind = cfs->get_u1_fast(); 182 const u2 method_index = cfs->get_u2_fast(); 183 cp->method_handle_index_at_put(index, ref_kind, method_index); 184 } 185 else if (tag == JVM_CONSTANT_MethodType) { 186 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 187 const u2 signature_index = cfs->get_u2_fast(); 188 cp->method_type_index_at_put(index, signature_index); 189 } 190 else { 191 ShouldNotReachHere(); 192 } 193 break; 194 } 195 case JVM_CONSTANT_InvokeDynamic : { 196 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 197 classfile_parse_error( 198 "Class file version does not support constant tag %u in class file %s", 199 tag, CHECK); 200 } 201 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 202 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 203 const u2 name_and_type_index = cfs->get_u2_fast(); 204 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 205 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 206 } 207 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 208 break; 209 } 210 case JVM_CONSTANT_Integer: { 211 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 212 const u4 bytes = cfs->get_u4_fast(); 213 cp->int_at_put(index, (jint)bytes); 214 break; 215 } 216 case JVM_CONSTANT_Float: { 217 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 218 const u4 bytes = cfs->get_u4_fast(); 219 cp->float_at_put(index, *(jfloat*)&bytes); 220 break; 221 } 222 case JVM_CONSTANT_Long: { 223 // A mangled type might cause you to overrun allocated memory 224 guarantee_property(index + 1 < length, 225 "Invalid constant pool entry %u in class file %s", 226 index, 227 CHECK); 228 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 229 const u8 bytes = cfs->get_u8_fast(); 230 cp->long_at_put(index, bytes); 231 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 232 break; 233 } 234 case JVM_CONSTANT_Double: { 235 // A mangled type might cause you to overrun allocated memory 236 guarantee_property(index+1 < length, 237 "Invalid constant pool entry %u in class file %s", 238 index, 239 CHECK); 240 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 241 const u8 bytes = cfs->get_u8_fast(); 242 cp->double_at_put(index, *(jdouble*)&bytes); 243 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 244 break; 245 } 246 case JVM_CONSTANT_NameAndType: { 247 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 248 const u2 name_index = cfs->get_u2_fast(); 249 const u2 signature_index = cfs->get_u2_fast(); 250 cp->name_and_type_at_put(index, name_index, signature_index); 251 break; 252 } 253 case JVM_CONSTANT_Utf8 : { 254 cfs->guarantee_more(2, CHECK); // utf8_length 255 u2 utf8_length = cfs->get_u2_fast(); 256 const u1* utf8_buffer = cfs->get_u1_buffer(); 257 assert(utf8_buffer != NULL, "null utf8 buffer"); 258 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 259 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 260 cfs->skip_u1_fast(utf8_length); 261 262 // Before storing the symbol, make sure it's legal 263 if (_need_verify) { 264 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 265 } 266 267 if (has_cp_patch_at(index)) { 268 Handle patch = clear_cp_patch_at(index); 269 guarantee_property(java_lang_String::is_instance(patch()), 270 "Illegal utf8 patch at %d in class file %s", 271 index, 272 CHECK); 273 const char* const str = java_lang_String::as_utf8_string(patch()); 274 // (could use java_lang_String::as_symbol instead, but might as well batch them) 275 utf8_buffer = (const u1*) str; 276 utf8_length = (int) strlen(str); 277 } 278 279 unsigned int hash; 280 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 281 utf8_length, 282 hash); 283 if (result == NULL) { 284 names[names_count] = (const char*)utf8_buffer; 285 lengths[names_count] = utf8_length; 286 indices[names_count] = index; 287 hashValues[names_count++] = hash; 288 if (names_count == SymbolTable::symbol_alloc_batch_size) { 289 SymbolTable::new_symbols(_loader_data, 290 cp, 291 names_count, 292 names, 293 lengths, 294 indices, 295 hashValues, 296 CHECK); 297 names_count = 0; 298 } 299 } else { 300 cp->symbol_at_put(index, result); 301 } 302 break; 303 } 304 default: { 305 classfile_parse_error("Unknown constant tag %u in class file %s", 306 tag, 307 CHECK); 308 break; 309 } 310 } // end of switch(tag) 311 } // end of for 312 313 // Allocate the remaining symbols 314 if (names_count > 0) { 315 SymbolTable::new_symbols(_loader_data, 316 cp, 317 names_count, 318 names, 319 lengths, 320 indices, 321 hashValues, 322 CHECK); 323 } 324 325 // Copy _current pointer of local copy back to stream. 326 assert(stream->current() == old_current, "non-exclusive use of stream"); 327 stream->set_current(cfs1.current()); 328 329 } 330 331 static inline bool valid_cp_range(int index, int length) { 332 return (index > 0 && index < length); 333 } 334 335 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 336 assert(cp != NULL, "invariant"); 337 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 338 return cp->symbol_at(index); 339 } 340 return NULL; 341 } 342 343 #ifdef ASSERT 344 PRAGMA_DIAG_PUSH 345 PRAGMA_FORMAT_NONLITERAL_IGNORED 346 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 347 ResourceMark rm(THREAD); 348 fatal(msg, _class_name->as_C_string()); 349 } 350 351 void ClassFileParser::report_assert_property_failure(const char* msg, 352 int index, 353 TRAPS) const { 354 ResourceMark rm(THREAD); 355 fatal(msg, index, _class_name->as_C_string()); 356 } 357 PRAGMA_DIAG_POP 358 #endif 359 360 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 361 ConstantPool* const cp, 362 const int length, 363 TRAPS) { 364 assert(cp != NULL, "invariant"); 365 assert(stream != NULL, "invariant"); 366 367 // parsing constant pool entries 368 parse_constant_pool_entries(stream, cp, length, CHECK); 369 370 int index = 1; // declared outside of loops for portability 371 372 // first verification pass - validate cross references 373 // and fixup class and string constants 374 for (index = 1; index < length; index++) { // Index 0 is unused 375 const jbyte tag = cp->tag_at(index).value(); 376 switch (tag) { 377 case JVM_CONSTANT_Class: { 378 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 379 break; 380 } 381 case JVM_CONSTANT_Fieldref: 382 // fall through 383 case JVM_CONSTANT_Methodref: 384 // fall through 385 case JVM_CONSTANT_InterfaceMethodref: { 386 if (!_need_verify) break; 387 const int klass_ref_index = cp->klass_ref_index_at(index); 388 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 389 check_property(valid_klass_reference_at(klass_ref_index), 390 "Invalid constant pool index %u in class file %s", 391 klass_ref_index, CHECK); 392 check_property(valid_cp_range(name_and_type_ref_index, length) && 393 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 394 "Invalid constant pool index %u in class file %s", 395 name_and_type_ref_index, CHECK); 396 break; 397 } 398 case JVM_CONSTANT_String: { 399 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 400 break; 401 } 402 case JVM_CONSTANT_Integer: 403 break; 404 case JVM_CONSTANT_Float: 405 break; 406 case JVM_CONSTANT_Long: 407 case JVM_CONSTANT_Double: { 408 index++; 409 check_property( 410 (index < length && cp->tag_at(index).is_invalid()), 411 "Improper constant pool long/double index %u in class file %s", 412 index, CHECK); 413 break; 414 } 415 case JVM_CONSTANT_NameAndType: { 416 if (!_need_verify) break; 417 const int name_ref_index = cp->name_ref_index_at(index); 418 const int signature_ref_index = cp->signature_ref_index_at(index); 419 check_property(valid_symbol_at(name_ref_index), 420 "Invalid constant pool index %u in class file %s", 421 name_ref_index, CHECK); 422 check_property(valid_symbol_at(signature_ref_index), 423 "Invalid constant pool index %u in class file %s", 424 signature_ref_index, CHECK); 425 break; 426 } 427 case JVM_CONSTANT_Utf8: 428 break; 429 case JVM_CONSTANT_UnresolvedClass: // fall-through 430 case JVM_CONSTANT_UnresolvedClassInError: { 431 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 432 break; 433 } 434 case JVM_CONSTANT_ClassIndex: { 435 const int class_index = cp->klass_index_at(index); 436 check_property(valid_symbol_at(class_index), 437 "Invalid constant pool index %u in class file %s", 438 class_index, CHECK); 439 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); 440 break; 441 } 442 case JVM_CONSTANT_StringIndex: { 443 const int string_index = cp->string_index_at(index); 444 check_property(valid_symbol_at(string_index), 445 "Invalid constant pool index %u in class file %s", 446 string_index, CHECK); 447 Symbol* const sym = cp->symbol_at(string_index); 448 cp->unresolved_string_at_put(index, sym); 449 break; 450 } 451 case JVM_CONSTANT_MethodHandle: { 452 const int ref_index = cp->method_handle_index_at(index); 453 check_property(valid_cp_range(ref_index, length), 454 "Invalid constant pool index %u in class file %s", 455 ref_index, CHECK); 456 const constantTag tag = cp->tag_at(ref_index); 457 const int ref_kind = cp->method_handle_ref_kind_at(index); 458 459 switch (ref_kind) { 460 case JVM_REF_getField: 461 case JVM_REF_getStatic: 462 case JVM_REF_putField: 463 case JVM_REF_putStatic: { 464 check_property( 465 tag.is_field(), 466 "Invalid constant pool index %u in class file %s (not a field)", 467 ref_index, CHECK); 468 break; 469 } 470 case JVM_REF_invokeVirtual: 471 case JVM_REF_newInvokeSpecial: { 472 check_property( 473 tag.is_method(), 474 "Invalid constant pool index %u in class file %s (not a method)", 475 ref_index, CHECK); 476 break; 477 } 478 case JVM_REF_invokeStatic: 479 case JVM_REF_invokeSpecial: { 480 check_property( 481 tag.is_method() || 482 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 483 "Invalid constant pool index %u in class file %s (not a method)", 484 ref_index, CHECK); 485 break; 486 } 487 case JVM_REF_invokeInterface: { 488 check_property( 489 tag.is_interface_method(), 490 "Invalid constant pool index %u in class file %s (not an interface method)", 491 ref_index, CHECK); 492 break; 493 } 494 default: { 495 classfile_parse_error( 496 "Bad method handle kind at constant pool index %u in class file %s", 497 index, CHECK); 498 } 499 } // switch(refkind) 500 // Keep the ref_index unchanged. It will be indirected at link-time. 501 break; 502 } // case MethodHandle 503 case JVM_CONSTANT_MethodType: { 504 const int ref_index = cp->method_type_index_at(index); 505 check_property(valid_symbol_at(ref_index), 506 "Invalid constant pool index %u in class file %s", 507 ref_index, CHECK); 508 break; 509 } 510 case JVM_CONSTANT_InvokeDynamic: { 511 const int name_and_type_ref_index = 512 cp->invoke_dynamic_name_and_type_ref_index_at(index); 513 514 check_property(valid_cp_range(name_and_type_ref_index, length) && 515 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 516 "Invalid constant pool index %u in class file %s", 517 name_and_type_ref_index, CHECK); 518 // bootstrap specifier index must be checked later, 519 // when BootstrapMethods attr is available 520 break; 521 } 522 default: { 523 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 524 ShouldNotReachHere(); 525 break; 526 } 527 } // switch(tag) 528 } // end of for 529 530 if (_cp_patches != NULL) { 531 // need to treat this_class specially... 532 int this_class_index; 533 { 534 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 535 const u1* const mark = stream->current(); 536 stream->skip_u2_fast(1); // skip flags 537 this_class_index = stream->get_u2_fast(); 538 stream->set_current(mark); // revert to mark 539 } 540 541 for (index = 1; index < length; index++) { // Index 0 is unused 542 if (has_cp_patch_at(index)) { 543 guarantee_property(index != this_class_index, 544 "Illegal constant pool patch to self at %d in class file %s", 545 index, CHECK); 546 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 547 } 548 } 549 } 550 551 if (!_need_verify) { 552 return; 553 } 554 555 // second verification pass - checks the strings are of the right format. 556 // but not yet to the other entries 557 for (index = 1; index < length; index++) { 558 const jbyte tag = cp->tag_at(index).value(); 559 switch (tag) { 560 case JVM_CONSTANT_UnresolvedClass: { 561 const Symbol* const class_name = cp->klass_name_at(index); 562 // check the name, even if _cp_patches will overwrite it 563 verify_legal_class_name(class_name, CHECK); 564 break; 565 } 566 case JVM_CONSTANT_NameAndType: { 567 if (_need_verify && _major_version >= JAVA_7_VERSION) { 568 const int sig_index = cp->signature_ref_index_at(index); 569 const int name_index = cp->name_ref_index_at(index); 570 const Symbol* const name = cp->symbol_at(name_index); 571 const Symbol* const sig = cp->symbol_at(sig_index); 572 guarantee_property(sig->utf8_length() != 0, 573 "Illegal zero length constant pool entry at %d in class %s", 574 sig_index, CHECK); 575 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 576 verify_legal_method_signature(name, sig, CHECK); 577 } else { 578 verify_legal_field_signature(name, sig, CHECK); 579 } 580 } 581 break; 582 } 583 case JVM_CONSTANT_InvokeDynamic: 584 case JVM_CONSTANT_Fieldref: 585 case JVM_CONSTANT_Methodref: 586 case JVM_CONSTANT_InterfaceMethodref: { 587 const int name_and_type_ref_index = 588 cp->name_and_type_ref_index_at(index); 589 // already verified to be utf8 590 const int name_ref_index = 591 cp->name_ref_index_at(name_and_type_ref_index); 592 // already verified to be utf8 593 const int signature_ref_index = 594 cp->signature_ref_index_at(name_and_type_ref_index); 595 const Symbol* const name = cp->symbol_at(name_ref_index); 596 const Symbol* const signature = cp->symbol_at(signature_ref_index); 597 if (tag == JVM_CONSTANT_Fieldref) { 598 verify_legal_field_name(name, CHECK); 599 if (_need_verify && _major_version >= JAVA_7_VERSION) { 600 // Signature is verified above, when iterating NameAndType_info. 601 // Need only to be sure it's non-zero length and the right type. 602 if (signature->utf8_length() == 0 || 603 signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 604 throwIllegalSignature( 605 "Field", name, signature, CHECK); 606 } 607 } else { 608 verify_legal_field_signature(name, signature, CHECK); 609 } 610 } else { 611 verify_legal_method_name(name, CHECK); 612 if (_need_verify && _major_version >= JAVA_7_VERSION) { 613 // Signature is verified above, when iterating NameAndType_info. 614 // Need only to be sure it's non-zero length and the right type. 615 if (signature->utf8_length() == 0 || 616 signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 617 throwIllegalSignature( 618 "Method", name, signature, CHECK); 619 } 620 } else { 621 verify_legal_method_signature(name, signature, CHECK); 622 } 623 if (tag == JVM_CONSTANT_Methodref) { 624 // 4509014: If a class method name begins with '<', it must be "<init>". 625 assert(name != NULL, "method name in constant pool is null"); 626 const unsigned int name_len = name->utf8_length(); 627 if (name_len != 0 && name->byte_at(0) == '<') { 628 if (name != vmSymbols::object_initializer_name()) { 629 classfile_parse_error( 630 "Bad method name at constant pool index %u in class file %s", 631 name_ref_index, CHECK); 632 } 633 } 634 } 635 } 636 break; 637 } 638 case JVM_CONSTANT_MethodHandle: { 639 const int ref_index = cp->method_handle_index_at(index); 640 const int ref_kind = cp->method_handle_ref_kind_at(index); 641 switch (ref_kind) { 642 case JVM_REF_invokeVirtual: 643 case JVM_REF_invokeStatic: 644 case JVM_REF_invokeSpecial: 645 case JVM_REF_newInvokeSpecial: { 646 const int name_and_type_ref_index = 647 cp->name_and_type_ref_index_at(ref_index); 648 const int name_ref_index = 649 cp->name_ref_index_at(name_and_type_ref_index); 650 const Symbol* const name = cp->symbol_at(name_ref_index); 651 if (ref_kind == JVM_REF_newInvokeSpecial) { 652 if (name != vmSymbols::object_initializer_name()) { 653 classfile_parse_error( 654 "Bad constructor name at constant pool index %u in class file %s", 655 name_ref_index, CHECK); 656 } 657 } else { 658 if (name == vmSymbols::object_initializer_name()) { 659 classfile_parse_error( 660 "Bad method name at constant pool index %u in class file %s", 661 name_ref_index, CHECK); 662 } 663 } 664 break; 665 } 666 // Other ref_kinds are already fully checked in previous pass. 667 } // switch(ref_kind) 668 break; 669 } 670 case JVM_CONSTANT_MethodType: { 671 const Symbol* const no_name = vmSymbols::type_name(); // place holder 672 const Symbol* const signature = cp->method_type_signature_at(index); 673 verify_legal_method_signature(no_name, signature, CHECK); 674 break; 675 } 676 case JVM_CONSTANT_Utf8: { 677 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 678 } 679 } // switch(tag) 680 } // end of for 681 } 682 683 void ClassFileParser::patch_constant_pool(ConstantPool* cp, 684 int index, 685 Handle patch, 686 TRAPS) { 687 assert(cp != NULL, "invariant"); 688 689 BasicType patch_type = T_VOID; 690 691 switch (cp->tag_at(index).value()) { 692 693 case JVM_CONSTANT_UnresolvedClass: { 694 // Patching a class means pre-resolving it. 695 // The name in the constant pool is ignored. 696 if (java_lang_Class::is_instance(patch())) { 697 guarantee_property(!java_lang_Class::is_primitive(patch()), 698 "Illegal class patch at %d in class file %s", 699 index, CHECK); 700 cp->klass_at_put(index, java_lang_Class::as_Klass(patch())); 701 } else { 702 guarantee_property(java_lang_String::is_instance(patch()), 703 "Illegal class patch at %d in class file %s", 704 index, CHECK); 705 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 706 cp->unresolved_klass_at_put(index, name); 707 } 708 break; 709 } 710 711 case JVM_CONSTANT_String: { 712 // skip this patch and don't clear it. Needs the oop array for resolved 713 // references to be created first. 714 return; 715 } 716 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 717 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 718 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 719 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 720 patch_prim: 721 { 722 jvalue value; 723 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 724 guarantee_property(value_type == patch_type, 725 "Illegal primitive patch at %d in class file %s", 726 index, CHECK); 727 switch (value_type) { 728 case T_INT: cp->int_at_put(index, value.i); break; 729 case T_FLOAT: cp->float_at_put(index, value.f); break; 730 case T_LONG: cp->long_at_put(index, value.j); break; 731 case T_DOUBLE: cp->double_at_put(index, value.d); break; 732 default: assert(false, ""); 733 } 734 } // end patch_prim label 735 break; 736 737 default: { 738 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 739 guarantee_property(!has_cp_patch_at(index), 740 "Illegal unexpected patch at %d in class file %s", 741 index, CHECK); 742 return; 743 } 744 } // end of switch(tag) 745 746 // On fall-through, mark the patch as used. 747 clear_cp_patch_at(index); 748 } 749 class NameSigHash: public ResourceObj { 750 public: 751 const Symbol* _name; // name 752 const Symbol* _sig; // signature 753 NameSigHash* _next; // Next entry in hash table 754 }; 755 756 static const int HASH_ROW_SIZE = 256; 757 758 static unsigned int hash(const Symbol* name, const Symbol* sig) { 759 unsigned int raw_hash = 0; 760 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 761 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 762 763 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 764 } 765 766 767 static void initialize_hashtable(NameSigHash** table) { 768 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 769 } 770 // Return false if the name/sig combination is found in table. 771 // Return true if no duplicate is found. And name/sig is added as a new entry in table. 772 // The old format checker uses heap sort to find duplicates. 773 // NOTE: caller should guarantee that GC doesn't happen during the life cycle 774 // of table since we don't expect Symbol*'s to move. 775 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 776 assert(name != NULL, "name in constant pool is NULL"); 777 778 // First lookup for duplicates 779 int index = hash(name, sig); 780 NameSigHash* entry = table[index]; 781 while (entry != NULL) { 782 if (entry->_name == name && entry->_sig == sig) { 783 return false; 784 } 785 entry = entry->_next; 786 } 787 788 // No duplicate is found, allocate a new entry and fill it. 789 entry = new NameSigHash(); 790 entry->_name = name; 791 entry->_sig = sig; 792 793 // Insert into hash table 794 entry->_next = table[index]; 795 table[index] = entry; 796 797 return true; 798 } 799 800 // Side-effects: populates the _local_interfaces field 801 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 802 const int itfs_len, 803 ConstantPool* const cp, 804 bool* const has_default_methods, 805 TRAPS) { 806 assert(stream != NULL, "invariant"); 807 assert(cp != NULL, "invariant"); 808 assert(has_default_methods != NULL, "invariant"); 809 810 if (itfs_len == 0) { 811 _local_interfaces = Universe::the_empty_klass_array(); 812 } else { 813 assert(itfs_len > 0, "only called for len>0"); 814 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 815 816 int index; 817 for (index = 0; index < itfs_len; index++) { 818 const u2 interface_index = stream->get_u2(CHECK); 819 KlassHandle interf; 820 check_property( 821 valid_klass_reference_at(interface_index), 822 "Interface name has bad constant pool index %u in class file %s", 823 interface_index, CHECK); 824 if (cp->tag_at(interface_index).is_klass()) { 825 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); 826 } else { 827 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 828 829 // Don't need to check legal name because it's checked when parsing constant pool. 830 // But need to make sure it's not an array type. 831 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 832 "Bad interface name in class file %s", CHECK); 833 834 // Call resolve_super so classcircularity is checked 835 const Klass* const k = 836 SystemDictionary::resolve_super_or_fail(_class_name, 837 unresolved_klass, 838 _loader_data->class_loader(), 839 _protection_domain, 840 false, 841 CHECK); 842 interf = KlassHandle(THREAD, k); 843 } 844 845 if (!interf()->is_interface()) { 846 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 847 "Implementing class"); 848 } 849 850 if (InstanceKlass::cast(interf())->has_default_methods()) { 851 *has_default_methods = true; 852 } 853 _local_interfaces->at_put(index, interf()); 854 } 855 856 if (!_need_verify || itfs_len <= 1) { 857 return; 858 } 859 860 // Check if there's any duplicates in interfaces 861 ResourceMark rm(THREAD); 862 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 863 NameSigHash*, 864 HASH_ROW_SIZE); 865 initialize_hashtable(interface_names); 866 bool dup = false; 867 { 868 debug_only(NoSafepointVerifier nsv;) 869 for (index = 0; index < itfs_len; index++) { 870 const Klass* const k = _local_interfaces->at(index); 871 const Symbol* const name = InstanceKlass::cast(k)->name(); 872 // If no duplicates, add (name, NULL) in hashtable interface_names. 873 if (!put_after_lookup(name, NULL, interface_names)) { 874 dup = true; 875 break; 876 } 877 } 878 } 879 if (dup) { 880 classfile_parse_error("Duplicate interface name in class file %s", CHECK); 881 } 882 } 883 } 884 885 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 886 int constantvalue_index, 887 int signature_index, 888 TRAPS) const { 889 // Make sure the constant pool entry is of a type appropriate to this field 890 guarantee_property( 891 (constantvalue_index > 0 && 892 constantvalue_index < cp->length()), 893 "Bad initial value index %u in ConstantValue attribute in class file %s", 894 constantvalue_index, CHECK); 895 896 const constantTag value_type = cp->tag_at(constantvalue_index); 897 switch(cp->basic_type_for_signature_at(signature_index)) { 898 case T_LONG: { 899 guarantee_property(value_type.is_long(), 900 "Inconsistent constant value type in class file %s", 901 CHECK); 902 break; 903 } 904 case T_FLOAT: { 905 guarantee_property(value_type.is_float(), 906 "Inconsistent constant value type in class file %s", 907 CHECK); 908 break; 909 } 910 case T_DOUBLE: { 911 guarantee_property(value_type.is_double(), 912 "Inconsistent constant value type in class file %s", 913 CHECK); 914 break; 915 } 916 case T_BYTE: 917 case T_CHAR: 918 case T_SHORT: 919 case T_BOOLEAN: 920 case T_INT: { 921 guarantee_property(value_type.is_int(), 922 "Inconsistent constant value type in class file %s", 923 CHECK); 924 break; 925 } 926 case T_OBJECT: { 927 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 928 && value_type.is_string()), 929 "Bad string initial value in class file %s", 930 CHECK); 931 break; 932 } 933 default: { 934 classfile_parse_error("Unable to set initial value %u in class file %s", 935 constantvalue_index, 936 CHECK); 937 } 938 } 939 } 940 941 class AnnotationCollector : public ResourceObj{ 942 public: 943 enum Location { _in_field, _in_method, _in_class }; 944 enum ID { 945 _unknown = 0, 946 _method_CallerSensitive, 947 _method_ForceInline, 948 _method_DontInline, 949 _method_InjectedProfile, 950 _method_LambdaForm_Compiled, 951 _method_LambdaForm_Hidden, 952 _method_HotSpotIntrinsicCandidate, 953 _jdk_internal_vm_annotation_Contended, 954 _field_Stable, 955 _jdk_internal_vm_annotation_ReservedStackAccess, 956 _annotation_LIMIT 957 }; 958 const Location _location; 959 int _annotations_present; 960 u2 _contended_group; 961 962 AnnotationCollector(Location location) 963 : _location(location), _annotations_present(0) 964 { 965 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 966 } 967 // If this annotation name has an ID, report it (or _none). 968 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 969 // Set the annotation name: 970 void set_annotation(ID id) { 971 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 972 _annotations_present |= nth_bit((int)id); 973 } 974 975 void remove_annotation(ID id) { 976 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 977 _annotations_present &= ~nth_bit((int)id); 978 } 979 980 // Report if the annotation is present. 981 bool has_any_annotations() const { return _annotations_present != 0; } 982 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 983 984 void set_contended_group(u2 group) { _contended_group = group; } 985 u2 contended_group() const { return _contended_group; } 986 987 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 988 989 void set_stable(bool stable) { set_annotation(_field_Stable); } 990 bool is_stable() const { return has_annotation(_field_Stable); } 991 }; 992 993 // This class also doubles as a holder for metadata cleanup. 994 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 995 private: 996 ClassLoaderData* _loader_data; 997 AnnotationArray* _field_annotations; 998 AnnotationArray* _field_type_annotations; 999 public: 1000 FieldAnnotationCollector(ClassLoaderData* loader_data) : 1001 AnnotationCollector(_in_field), 1002 _loader_data(loader_data), 1003 _field_annotations(NULL), 1004 _field_type_annotations(NULL) {} 1005 ~FieldAnnotationCollector(); 1006 void apply_to(FieldInfo* f); 1007 AnnotationArray* field_annotations() { return _field_annotations; } 1008 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1009 1010 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1011 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1012 }; 1013 1014 class MethodAnnotationCollector : public AnnotationCollector{ 1015 public: 1016 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1017 void apply_to(methodHandle m); 1018 }; 1019 1020 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1021 public: 1022 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1023 void apply_to(InstanceKlass* ik); 1024 }; 1025 1026 1027 static int skip_annotation_value(const u1*, int, int); // fwd decl 1028 1029 // Skip an annotation. Return >=limit if there is any problem. 1030 static int skip_annotation(const u1* buffer, int limit, int index) { 1031 assert(buffer != NULL, "invariant"); 1032 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1033 // value := switch (tag:u1) { ... } 1034 index += 2; // skip atype 1035 if ((index += 2) >= limit) return limit; // read nmem 1036 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1037 while (--nmem >= 0 && index < limit) { 1038 index += 2; // skip member 1039 index = skip_annotation_value(buffer, limit, index); 1040 } 1041 return index; 1042 } 1043 1044 // Skip an annotation value. Return >=limit if there is any problem. 1045 static int skip_annotation_value(const u1* buffer, int limit, int index) { 1046 assert(buffer != NULL, "invariant"); 1047 1048 // value := switch (tag:u1) { 1049 // case B, C, I, S, Z, D, F, J, c: con:u2; 1050 // case e: e_class:u2 e_name:u2; 1051 // case s: s_con:u2; 1052 // case [: do(nval:u2) {value}; 1053 // case @: annotation; 1054 // case s: s_con:u2; 1055 // } 1056 if ((index += 1) >= limit) return limit; // read tag 1057 const u1 tag = buffer[index - 1]; 1058 switch (tag) { 1059 case 'B': 1060 case 'C': 1061 case 'I': 1062 case 'S': 1063 case 'Z': 1064 case 'D': 1065 case 'F': 1066 case 'J': 1067 case 'c': 1068 case 's': 1069 index += 2; // skip con or s_con 1070 break; 1071 case 'e': 1072 index += 4; // skip e_class, e_name 1073 break; 1074 case '[': 1075 { 1076 if ((index += 2) >= limit) return limit; // read nval 1077 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1078 while (--nval >= 0 && index < limit) { 1079 index = skip_annotation_value(buffer, limit, index); 1080 } 1081 } 1082 break; 1083 case '@': 1084 index = skip_annotation(buffer, limit, index); 1085 break; 1086 default: 1087 return limit; // bad tag byte 1088 } 1089 return index; 1090 } 1091 1092 // Sift through annotations, looking for those significant to the VM: 1093 static void parse_annotations(const ConstantPool* const cp, 1094 const u1* buffer, int limit, 1095 AnnotationCollector* coll, 1096 ClassLoaderData* loader_data, 1097 TRAPS) { 1098 1099 assert(cp != NULL, "invariant"); 1100 assert(buffer != NULL, "invariant"); 1101 assert(coll != NULL, "invariant"); 1102 assert(loader_data != NULL, "invariant"); 1103 1104 // annotations := do(nann:u2) {annotation} 1105 int index = 0; 1106 if ((index += 2) >= limit) return; // read nann 1107 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1108 enum { // initial annotation layout 1109 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1110 count_off = 2, // u2 such as 1 (one value) 1111 member_off = 4, // utf8 such as 'value' 1112 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1113 e_tag_val = 'e', 1114 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1115 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1116 e_size = 11, // end of 'e' annotation 1117 c_tag_val = 'c', // payload is type 1118 c_con_off = 7, // utf8 payload, such as 'I' 1119 c_size = 9, // end of 'c' annotation 1120 s_tag_val = 's', // payload is String 1121 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1122 s_size = 9, 1123 min_size = 6 // smallest possible size (zero members) 1124 }; 1125 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) { 1126 int index0 = index; 1127 index = skip_annotation(buffer, limit, index); 1128 const u1* const abase = buffer + index0; 1129 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1130 const int count = Bytes::get_Java_u2((address)abase + count_off); 1131 const Symbol* const aname = check_symbol_at(cp, atype); 1132 if (aname == NULL) break; // invalid annotation name 1133 const Symbol* member = NULL; 1134 if (count >= 1) { 1135 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1136 member = check_symbol_at(cp, member_index); 1137 if (member == NULL) break; // invalid member name 1138 } 1139 1140 // Here is where parsing particular annotations will take place. 1141 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1142 if (AnnotationCollector::_unknown == id) continue; 1143 coll->set_annotation(id); 1144 1145 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1146 // @Contended can optionally specify the contention group. 1147 // 1148 // Contended group defines the equivalence class over the fields: 1149 // the fields within the same contended group are not treated distinct. 1150 // The only exception is default group, which does not incur the 1151 // equivalence. Naturally, contention group for classes is meaningless. 1152 // 1153 // While the contention group is specified as String, annotation 1154 // values are already interned, and we might as well use the constant 1155 // pool index as the group tag. 1156 // 1157 u2 group_index = 0; // default contended group 1158 if (count == 1 1159 && s_size == (index - index0) // match size 1160 && s_tag_val == *(abase + tag_off) 1161 && member == vmSymbols::value_name()) { 1162 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1163 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1164 group_index = 0; // default contended group 1165 } 1166 } 1167 coll->set_contended_group(group_index); 1168 } 1169 } 1170 } 1171 1172 1173 // Parse attributes for a field. 1174 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1175 u2 attributes_count, 1176 bool is_static, u2 signature_index, 1177 u2* const constantvalue_index_addr, 1178 bool* const is_synthetic_addr, 1179 u2* const generic_signature_index_addr, 1180 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1181 TRAPS) { 1182 assert(cfs != NULL, "invariant"); 1183 assert(constantvalue_index_addr != NULL, "invariant"); 1184 assert(is_synthetic_addr != NULL, "invariant"); 1185 assert(generic_signature_index_addr != NULL, "invariant"); 1186 assert(parsed_annotations != NULL, "invariant"); 1187 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1188 1189 u2 constantvalue_index = 0; 1190 u2 generic_signature_index = 0; 1191 bool is_synthetic = false; 1192 const u1* runtime_visible_annotations = NULL; 1193 int runtime_visible_annotations_length = 0; 1194 const u1* runtime_invisible_annotations = NULL; 1195 int runtime_invisible_annotations_length = 0; 1196 const u1* runtime_visible_type_annotations = NULL; 1197 int runtime_visible_type_annotations_length = 0; 1198 const u1* runtime_invisible_type_annotations = NULL; 1199 int runtime_invisible_type_annotations_length = 0; 1200 bool runtime_invisible_annotations_exists = false; 1201 bool runtime_invisible_type_annotations_exists = false; 1202 const ConstantPool* const cp = _cp; 1203 1204 while (attributes_count--) { 1205 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1206 const u2 attribute_name_index = cfs->get_u2_fast(); 1207 const u4 attribute_length = cfs->get_u4_fast(); 1208 check_property(valid_symbol_at(attribute_name_index), 1209 "Invalid field attribute index %u in class file %s", 1210 attribute_name_index, 1211 CHECK); 1212 1213 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1214 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1215 // ignore if non-static 1216 if (constantvalue_index != 0) { 1217 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1218 } 1219 check_property( 1220 attribute_length == 2, 1221 "Invalid ConstantValue field attribute length %u in class file %s", 1222 attribute_length, CHECK); 1223 1224 constantvalue_index = cfs->get_u2(CHECK); 1225 if (_need_verify) { 1226 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1227 } 1228 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1229 if (attribute_length != 0) { 1230 classfile_parse_error( 1231 "Invalid Synthetic field attribute length %u in class file %s", 1232 attribute_length, CHECK); 1233 } 1234 is_synthetic = true; 1235 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1236 if (attribute_length != 0) { 1237 classfile_parse_error( 1238 "Invalid Deprecated field attribute length %u in class file %s", 1239 attribute_length, CHECK); 1240 } 1241 } else if (_major_version >= JAVA_1_5_VERSION) { 1242 if (attribute_name == vmSymbols::tag_signature()) { 1243 if (attribute_length != 2) { 1244 classfile_parse_error( 1245 "Wrong size %u for field's Signature attribute in class file %s", 1246 attribute_length, CHECK); 1247 } 1248 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1249 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1250 if (runtime_visible_annotations != NULL) { 1251 classfile_parse_error( 1252 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1253 } 1254 runtime_visible_annotations_length = attribute_length; 1255 runtime_visible_annotations = cfs->get_u1_buffer(); 1256 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1257 parse_annotations(cp, 1258 runtime_visible_annotations, 1259 runtime_visible_annotations_length, 1260 parsed_annotations, 1261 _loader_data, 1262 CHECK); 1263 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 1264 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1265 if (runtime_invisible_annotations_exists) { 1266 classfile_parse_error( 1267 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1268 } 1269 runtime_invisible_annotations_exists = true; 1270 if (PreserveAllAnnotations) { 1271 runtime_invisible_annotations_length = attribute_length; 1272 runtime_invisible_annotations = cfs->get_u1_buffer(); 1273 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1274 } 1275 cfs->skip_u1(attribute_length, CHECK); 1276 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1277 if (runtime_visible_type_annotations != NULL) { 1278 classfile_parse_error( 1279 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1280 } 1281 runtime_visible_type_annotations_length = attribute_length; 1282 runtime_visible_type_annotations = cfs->get_u1_buffer(); 1283 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1284 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1285 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1286 if (runtime_invisible_type_annotations_exists) { 1287 classfile_parse_error( 1288 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1289 } else { 1290 runtime_invisible_type_annotations_exists = true; 1291 } 1292 if (PreserveAllAnnotations) { 1293 runtime_invisible_type_annotations_length = attribute_length; 1294 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 1295 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1296 } 1297 cfs->skip_u1(attribute_length, CHECK); 1298 } else { 1299 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1300 } 1301 } else { 1302 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1303 } 1304 } 1305 1306 *constantvalue_index_addr = constantvalue_index; 1307 *is_synthetic_addr = is_synthetic; 1308 *generic_signature_index_addr = generic_signature_index; 1309 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1310 runtime_visible_annotations_length, 1311 runtime_invisible_annotations, 1312 runtime_invisible_annotations_length, 1313 CHECK); 1314 parsed_annotations->set_field_annotations(a); 1315 a = assemble_annotations(runtime_visible_type_annotations, 1316 runtime_visible_type_annotations_length, 1317 runtime_invisible_type_annotations, 1318 runtime_invisible_type_annotations_length, 1319 CHECK); 1320 parsed_annotations->set_field_type_annotations(a); 1321 return; 1322 } 1323 1324 1325 // Field allocation types. Used for computing field offsets. 1326 1327 enum FieldAllocationType { 1328 STATIC_OOP, // Oops 1329 STATIC_BYTE, // Boolean, Byte, char 1330 STATIC_SHORT, // shorts 1331 STATIC_WORD, // ints 1332 STATIC_DOUBLE, // aligned long or double 1333 NONSTATIC_OOP, 1334 NONSTATIC_BYTE, 1335 NONSTATIC_SHORT, 1336 NONSTATIC_WORD, 1337 NONSTATIC_DOUBLE, 1338 MAX_FIELD_ALLOCATION_TYPE, 1339 BAD_ALLOCATION_TYPE = -1 1340 }; 1341 1342 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1343 BAD_ALLOCATION_TYPE, // 0 1344 BAD_ALLOCATION_TYPE, // 1 1345 BAD_ALLOCATION_TYPE, // 2 1346 BAD_ALLOCATION_TYPE, // 3 1347 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1348 NONSTATIC_SHORT, // T_CHAR = 5, 1349 NONSTATIC_WORD, // T_FLOAT = 6, 1350 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1351 NONSTATIC_BYTE, // T_BYTE = 8, 1352 NONSTATIC_SHORT, // T_SHORT = 9, 1353 NONSTATIC_WORD, // T_INT = 10, 1354 NONSTATIC_DOUBLE, // T_LONG = 11, 1355 NONSTATIC_OOP, // T_OBJECT = 12, 1356 NONSTATIC_OOP, // T_ARRAY = 13, 1357 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1358 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1359 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1360 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1361 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1362 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1363 BAD_ALLOCATION_TYPE, // 0 1364 BAD_ALLOCATION_TYPE, // 1 1365 BAD_ALLOCATION_TYPE, // 2 1366 BAD_ALLOCATION_TYPE, // 3 1367 STATIC_BYTE , // T_BOOLEAN = 4, 1368 STATIC_SHORT, // T_CHAR = 5, 1369 STATIC_WORD, // T_FLOAT = 6, 1370 STATIC_DOUBLE, // T_DOUBLE = 7, 1371 STATIC_BYTE, // T_BYTE = 8, 1372 STATIC_SHORT, // T_SHORT = 9, 1373 STATIC_WORD, // T_INT = 10, 1374 STATIC_DOUBLE, // T_LONG = 11, 1375 STATIC_OOP, // T_OBJECT = 12, 1376 STATIC_OOP, // T_ARRAY = 13, 1377 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1378 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1379 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1380 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1381 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1382 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1383 }; 1384 1385 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1386 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1387 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1388 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1389 return result; 1390 } 1391 1392 class ClassFileParser::FieldAllocationCount : public ResourceObj { 1393 public: 1394 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1395 1396 FieldAllocationCount() { 1397 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1398 count[i] = 0; 1399 } 1400 } 1401 1402 FieldAllocationType update(bool is_static, BasicType type) { 1403 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1404 if (atype != BAD_ALLOCATION_TYPE) { 1405 // Make sure there is no overflow with injected fields. 1406 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1407 count[atype]++; 1408 } 1409 return atype; 1410 } 1411 }; 1412 1413 // Side-effects: populates the _fields, _fields_annotations, 1414 // _fields_type_annotations fields 1415 void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1416 bool is_interface, 1417 FieldAllocationCount* const fac, 1418 ConstantPool* cp, 1419 const int cp_size, 1420 u2* const java_fields_count_ptr, 1421 TRAPS) { 1422 1423 assert(cfs != NULL, "invariant"); 1424 assert(fac != NULL, "invariant"); 1425 assert(cp != NULL, "invariant"); 1426 assert(java_fields_count_ptr != NULL, "invariant"); 1427 1428 assert(NULL == _fields, "invariant"); 1429 assert(NULL == _fields_annotations, "invariant"); 1430 assert(NULL == _fields_type_annotations, "invariant"); 1431 1432 cfs->guarantee_more(2, CHECK); // length 1433 const u2 length = cfs->get_u2_fast(); 1434 *java_fields_count_ptr = length; 1435 1436 int num_injected = 0; 1437 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1438 &num_injected); 1439 const int total_fields = length + num_injected; 1440 1441 // The field array starts with tuples of shorts 1442 // [access, name index, sig index, initial value index, byte offset]. 1443 // A generic signature slot only exists for field with generic 1444 // signature attribute. And the access flag is set with 1445 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1446 // signature slots are at the end of the field array and after all 1447 // other fields data. 1448 // 1449 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1450 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1451 // ... 1452 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1453 // [generic signature index] 1454 // [generic signature index] 1455 // ... 1456 // 1457 // Allocate a temporary resource array for field data. For each field, 1458 // a slot is reserved in the temporary array for the generic signature 1459 // index. After parsing all fields, the data are copied to a permanent 1460 // array and any unused slots will be discarded. 1461 ResourceMark rm(THREAD); 1462 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1463 u2, 1464 total_fields * (FieldInfo::field_slots + 1)); 1465 1466 // The generic signature slots start after all other fields' data. 1467 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1468 int num_generic_signature = 0; 1469 for (int n = 0; n < length; n++) { 1470 // access_flags, name_index, descriptor_index, attributes_count 1471 cfs->guarantee_more(8, CHECK); 1472 1473 AccessFlags access_flags; 1474 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1475 verify_legal_field_modifiers(flags, is_interface, CHECK); 1476 access_flags.set_flags(flags); 1477 1478 const u2 name_index = cfs->get_u2_fast(); 1479 check_property(valid_symbol_at(name_index), 1480 "Invalid constant pool index %u for field name in class file %s", 1481 name_index, CHECK); 1482 const Symbol* const name = cp->symbol_at(name_index); 1483 verify_legal_field_name(name, CHECK); 1484 1485 const u2 signature_index = cfs->get_u2_fast(); 1486 check_property(valid_symbol_at(signature_index), 1487 "Invalid constant pool index %u for field signature in class file %s", 1488 signature_index, CHECK); 1489 const Symbol* const sig = cp->symbol_at(signature_index); 1490 verify_legal_field_signature(name, sig, CHECK); 1491 1492 u2 constantvalue_index = 0; 1493 bool is_synthetic = false; 1494 u2 generic_signature_index = 0; 1495 const bool is_static = access_flags.is_static(); 1496 FieldAnnotationCollector parsed_annotations(_loader_data); 1497 1498 const u2 attributes_count = cfs->get_u2_fast(); 1499 if (attributes_count > 0) { 1500 parse_field_attributes(cfs, 1501 attributes_count, 1502 is_static, 1503 signature_index, 1504 &constantvalue_index, 1505 &is_synthetic, 1506 &generic_signature_index, 1507 &parsed_annotations, 1508 CHECK); 1509 1510 if (parsed_annotations.field_annotations() != NULL) { 1511 if (_fields_annotations == NULL) { 1512 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1513 _loader_data, length, NULL, 1514 CHECK); 1515 } 1516 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1517 parsed_annotations.set_field_annotations(NULL); 1518 } 1519 if (parsed_annotations.field_type_annotations() != NULL) { 1520 if (_fields_type_annotations == NULL) { 1521 _fields_type_annotations = 1522 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1523 length, 1524 NULL, 1525 CHECK); 1526 } 1527 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1528 parsed_annotations.set_field_type_annotations(NULL); 1529 } 1530 1531 if (is_synthetic) { 1532 access_flags.set_is_synthetic(); 1533 } 1534 if (generic_signature_index != 0) { 1535 access_flags.set_field_has_generic_signature(); 1536 fa[generic_signature_slot] = generic_signature_index; 1537 generic_signature_slot ++; 1538 num_generic_signature ++; 1539 } 1540 } 1541 1542 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1543 field->initialize(access_flags.as_short(), 1544 name_index, 1545 signature_index, 1546 constantvalue_index); 1547 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1548 1549 // Remember how many oops we encountered and compute allocation type 1550 const FieldAllocationType atype = fac->update(is_static, type); 1551 field->set_allocation_type(atype); 1552 1553 // After field is initialized with type, we can augment it with aux info 1554 if (parsed_annotations.has_any_annotations()) 1555 parsed_annotations.apply_to(field); 1556 } 1557 1558 int index = length; 1559 if (num_injected != 0) { 1560 for (int n = 0; n < num_injected; n++) { 1561 // Check for duplicates 1562 if (injected[n].may_be_java) { 1563 const Symbol* const name = injected[n].name(); 1564 const Symbol* const signature = injected[n].signature(); 1565 bool duplicate = false; 1566 for (int i = 0; i < length; i++) { 1567 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1568 if (name == cp->symbol_at(f->name_index()) && 1569 signature == cp->symbol_at(f->signature_index())) { 1570 // Symbol is desclared in Java so skip this one 1571 duplicate = true; 1572 break; 1573 } 1574 } 1575 if (duplicate) { 1576 // These will be removed from the field array at the end 1577 continue; 1578 } 1579 } 1580 1581 // Injected field 1582 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1583 field->initialize(JVM_ACC_FIELD_INTERNAL, 1584 injected[n].name_index, 1585 injected[n].signature_index, 1586 0); 1587 1588 const BasicType type = FieldType::basic_type(injected[n].signature()); 1589 1590 // Remember how many oops we encountered and compute allocation type 1591 const FieldAllocationType atype = fac->update(false, type); 1592 field->set_allocation_type(atype); 1593 index++; 1594 } 1595 } 1596 1597 assert(NULL == _fields, "invariant"); 1598 1599 _fields = 1600 MetadataFactory::new_array<u2>(_loader_data, 1601 index * FieldInfo::field_slots + num_generic_signature, 1602 CHECK); 1603 // Sometimes injected fields already exist in the Java source so 1604 // the fields array could be too long. In that case the 1605 // fields array is trimed. Also unused slots that were reserved 1606 // for generic signature indexes are discarded. 1607 { 1608 int i = 0; 1609 for (; i < index * FieldInfo::field_slots; i++) { 1610 _fields->at_put(i, fa[i]); 1611 } 1612 for (int j = total_fields * FieldInfo::field_slots; 1613 j < generic_signature_slot; j++) { 1614 _fields->at_put(i++, fa[j]); 1615 } 1616 assert(_fields->length() == i, ""); 1617 } 1618 1619 if (_need_verify && length > 1) { 1620 // Check duplicated fields 1621 ResourceMark rm(THREAD); 1622 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1623 THREAD, NameSigHash*, HASH_ROW_SIZE); 1624 initialize_hashtable(names_and_sigs); 1625 bool dup = false; 1626 { 1627 debug_only(NoSafepointVerifier nsv;) 1628 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1629 const Symbol* const name = fs.name(); 1630 const Symbol* const sig = fs.signature(); 1631 // If no duplicates, add name/signature in hashtable names_and_sigs. 1632 if (!put_after_lookup(name, sig, names_and_sigs)) { 1633 dup = true; 1634 break; 1635 } 1636 } 1637 } 1638 if (dup) { 1639 classfile_parse_error("Duplicate field name&signature in class file %s", 1640 CHECK); 1641 } 1642 } 1643 } 1644 1645 1646 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1647 while (length-- > 0) { 1648 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1649 } 1650 } 1651 1652 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1653 u4 code_length, 1654 u4 exception_table_length, 1655 TRAPS) { 1656 assert(cfs != NULL, "invariant"); 1657 1658 const u2* const exception_table_start = cfs->get_u2_buffer(); 1659 assert(exception_table_start != NULL, "null exception table"); 1660 1661 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1662 // end_pc, 1663 // handler_pc, 1664 // catch_type_index 1665 1666 // Will check legal target after parsing code array in verifier. 1667 if (_need_verify) { 1668 for (unsigned int i = 0; i < exception_table_length; i++) { 1669 const u2 start_pc = cfs->get_u2_fast(); 1670 const u2 end_pc = cfs->get_u2_fast(); 1671 const u2 handler_pc = cfs->get_u2_fast(); 1672 const u2 catch_type_index = cfs->get_u2_fast(); 1673 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1674 "Illegal exception table range in class file %s", 1675 CHECK_NULL); 1676 guarantee_property(handler_pc < code_length, 1677 "Illegal exception table handler in class file %s", 1678 CHECK_NULL); 1679 if (catch_type_index != 0) { 1680 guarantee_property(valid_klass_reference_at(catch_type_index), 1681 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1682 } 1683 } 1684 } else { 1685 cfs->skip_u2_fast(exception_table_length * 4); 1686 } 1687 return exception_table_start; 1688 } 1689 1690 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1691 u4 code_length, 1692 CompressedLineNumberWriteStream**const write_stream, 1693 TRAPS) { 1694 1695 const ClassFileStream* const cfs = _stream; 1696 unsigned int num_entries = cfs->get_u2(CHECK); 1697 1698 // Each entry is a u2 start_pc, and a u2 line_number 1699 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1700 1701 // Verify line number attribute and table length 1702 check_property( 1703 code_attribute_length == sizeof(u2) + length_in_bytes, 1704 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1705 1706 cfs->guarantee_more(length_in_bytes, CHECK); 1707 1708 if ((*write_stream) == NULL) { 1709 if (length_in_bytes > fixed_buffer_size) { 1710 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1711 } else { 1712 (*write_stream) = new CompressedLineNumberWriteStream( 1713 _linenumbertable_buffer, fixed_buffer_size); 1714 } 1715 } 1716 1717 while (num_entries-- > 0) { 1718 const u2 bci = cfs->get_u2_fast(); // start_pc 1719 const u2 line = cfs->get_u2_fast(); // line_number 1720 guarantee_property(bci < code_length, 1721 "Invalid pc in LineNumberTable in class file %s", CHECK); 1722 (*write_stream)->write_pair(bci, line); 1723 } 1724 } 1725 1726 1727 class LVT_Hash : public AllStatic { 1728 public: 1729 1730 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1731 /* 1732 * 3-tuple start_bci/length/slot has to be unique key, 1733 * so the following comparison seems to be redundant: 1734 * && elem->name_cp_index == entry->_elem->name_cp_index 1735 */ 1736 return (e0.start_bci == e1.start_bci && 1737 e0.length == e1.length && 1738 e0.name_cp_index == e1.name_cp_index && 1739 e0.slot == e1.slot); 1740 } 1741 1742 static unsigned int hash(LocalVariableTableElement const& e0) { 1743 unsigned int raw_hash = e0.start_bci; 1744 1745 raw_hash = e0.length + raw_hash * 37; 1746 raw_hash = e0.name_cp_index + raw_hash * 37; 1747 raw_hash = e0.slot + raw_hash * 37; 1748 1749 return raw_hash; 1750 } 1751 }; 1752 1753 1754 // Class file LocalVariableTable elements. 1755 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1756 public: 1757 u2 start_bci; 1758 u2 length; 1759 u2 name_cp_index; 1760 u2 descriptor_cp_index; 1761 u2 slot; 1762 }; 1763 1764 static void copy_lvt_element(const Classfile_LVT_Element* const src, 1765 LocalVariableTableElement* const lvt) { 1766 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1767 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1768 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1769 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1770 lvt->signature_cp_index = 0; 1771 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1772 } 1773 1774 // Function is used to parse both attributes: 1775 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1776 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1777 u4 code_length, 1778 u2 max_locals, 1779 u4 code_attribute_length, 1780 u2* const localvariable_table_length, 1781 bool isLVTT, 1782 TRAPS) { 1783 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1784 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1785 const unsigned int size = 1786 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1787 1788 const ConstantPool* const cp = _cp; 1789 1790 // Verify local variable table attribute has right length 1791 if (_need_verify) { 1792 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1793 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1794 } 1795 1796 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1797 assert(localvariable_table_start != NULL, "null local variable table"); 1798 if (!_need_verify) { 1799 cfs->skip_u2_fast(size); 1800 } else { 1801 cfs->guarantee_more(size * 2, CHECK_NULL); 1802 for(int i = 0; i < (*localvariable_table_length); i++) { 1803 const u2 start_pc = cfs->get_u2_fast(); 1804 const u2 length = cfs->get_u2_fast(); 1805 const u2 name_index = cfs->get_u2_fast(); 1806 const u2 descriptor_index = cfs->get_u2_fast(); 1807 const u2 index = cfs->get_u2_fast(); 1808 // Assign to a u4 to avoid overflow 1809 const u4 end_pc = (u4)start_pc + (u4)length; 1810 1811 if (start_pc >= code_length) { 1812 classfile_parse_error( 1813 "Invalid start_pc %u in %s in class file %s", 1814 start_pc, tbl_name, CHECK_NULL); 1815 } 1816 if (end_pc > code_length) { 1817 classfile_parse_error( 1818 "Invalid length %u in %s in class file %s", 1819 length, tbl_name, CHECK_NULL); 1820 } 1821 const int cp_size = cp->length(); 1822 guarantee_property(valid_symbol_at(name_index), 1823 "Name index %u in %s has bad constant type in class file %s", 1824 name_index, tbl_name, CHECK_NULL); 1825 guarantee_property(valid_symbol_at(descriptor_index), 1826 "Signature index %u in %s has bad constant type in class file %s", 1827 descriptor_index, tbl_name, CHECK_NULL); 1828 1829 const Symbol* const name = cp->symbol_at(name_index); 1830 const Symbol* const sig = cp->symbol_at(descriptor_index); 1831 verify_legal_field_name(name, CHECK_NULL); 1832 u2 extra_slot = 0; 1833 if (!isLVTT) { 1834 verify_legal_field_signature(name, sig, CHECK_NULL); 1835 1836 // 4894874: check special cases for double and long local variables 1837 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1838 sig == vmSymbols::type_signature(T_LONG)) { 1839 extra_slot = 1; 1840 } 1841 } 1842 guarantee_property((index + extra_slot) < max_locals, 1843 "Invalid index %u in %s in class file %s", 1844 index, tbl_name, CHECK_NULL); 1845 } 1846 } 1847 return localvariable_table_start; 1848 } 1849 1850 1851 void ClassFileParser::parse_type_array(u2 array_length, 1852 u4 code_length, 1853 u4* const u1_index, 1854 u4* const u2_index, 1855 u1* const u1_array, 1856 u2* const u2_array, 1857 TRAPS) { 1858 const ClassFileStream* const cfs = _stream; 1859 u2 index = 0; // index in the array with long/double occupying two slots 1860 u4 i1 = *u1_index; 1861 u4 i2 = *u2_index + 1; 1862 for(int i = 0; i < array_length; i++) { 1863 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1864 index++; 1865 if (tag == ITEM_Long || tag == ITEM_Double) { 1866 index++; 1867 } else if (tag == ITEM_Object) { 1868 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1869 guarantee_property(valid_klass_reference_at(class_index), 1870 "Bad class index %u in StackMap in class file %s", 1871 class_index, CHECK); 1872 } else if (tag == ITEM_Uninitialized) { 1873 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1874 guarantee_property( 1875 offset < code_length, 1876 "Bad uninitialized type offset %u in StackMap in class file %s", 1877 offset, CHECK); 1878 } else { 1879 guarantee_property( 1880 tag <= (u1)ITEM_Uninitialized, 1881 "Unknown variable type %u in StackMap in class file %s", 1882 tag, CHECK); 1883 } 1884 } 1885 u2_array[*u2_index] = index; 1886 *u1_index = i1; 1887 *u2_index = i2; 1888 } 1889 1890 static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1891 u4 code_attribute_length, 1892 bool need_verify, 1893 TRAPS) { 1894 assert(cfs != NULL, "invariant"); 1895 1896 if (0 == code_attribute_length) { 1897 return NULL; 1898 } 1899 1900 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1901 assert(stackmap_table_start != NULL, "null stackmap table"); 1902 1903 // check code_attribute_length first 1904 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1905 1906 if (!need_verify && !DumpSharedSpaces) { 1907 return NULL; 1908 } 1909 return stackmap_table_start; 1910 } 1911 1912 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1913 u2* const checked_exceptions_length, 1914 u4 method_attribute_length, 1915 TRAPS) { 1916 assert(cfs != NULL, "invariant"); 1917 assert(checked_exceptions_length != NULL, "invariant"); 1918 1919 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1920 *checked_exceptions_length = cfs->get_u2_fast(); 1921 const unsigned int size = 1922 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1923 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1924 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1925 if (!_need_verify) { 1926 cfs->skip_u2_fast(size); 1927 } else { 1928 // Verify each value in the checked exception table 1929 u2 checked_exception; 1930 const u2 len = *checked_exceptions_length; 1931 cfs->guarantee_more(2 * len, CHECK_NULL); 1932 for (int i = 0; i < len; i++) { 1933 checked_exception = cfs->get_u2_fast(); 1934 check_property( 1935 valid_klass_reference_at(checked_exception), 1936 "Exception name has bad type at constant pool %u in class file %s", 1937 checked_exception, CHECK_NULL); 1938 } 1939 } 1940 // check exceptions attribute length 1941 if (_need_verify) { 1942 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1943 sizeof(u2) * size), 1944 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1945 } 1946 return checked_exceptions_start; 1947 } 1948 1949 void ClassFileParser::throwIllegalSignature(const char* type, 1950 const Symbol* name, 1951 const Symbol* sig, 1952 TRAPS) const { 1953 assert(name != NULL, "invariant"); 1954 assert(sig != NULL, "invariant"); 1955 1956 ResourceMark rm(THREAD); 1957 Exceptions::fthrow(THREAD_AND_LOCATION, 1958 vmSymbols::java_lang_ClassFormatError(), 1959 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1960 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1961 } 1962 1963 AnnotationCollector::ID 1964 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 1965 const Symbol* name) { 1966 const vmSymbols::SID sid = vmSymbols::find_sid(name); 1967 // Privileged code can use all annotations. Other code silently drops some. 1968 const bool privileged = loader_data->is_the_null_class_loader_data() || 1969 loader_data->is_platform_class_loader_data() || 1970 loader_data->is_anonymous(); 1971 switch (sid) { 1972 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): { 1973 if (_location != _in_method) break; // only allow for methods 1974 if (!privileged) break; // only allow in privileged code 1975 return _method_CallerSensitive; 1976 } 1977 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 1978 if (_location != _in_method) break; // only allow for methods 1979 if (!privileged) break; // only allow in privileged code 1980 return _method_ForceInline; 1981 } 1982 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 1983 if (_location != _in_method) break; // only allow for methods 1984 if (!privileged) break; // only allow in privileged code 1985 return _method_DontInline; 1986 } 1987 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 1988 if (_location != _in_method) break; // only allow for methods 1989 if (!privileged) break; // only allow in privileged code 1990 return _method_InjectedProfile; 1991 } 1992 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 1993 if (_location != _in_method) break; // only allow for methods 1994 if (!privileged) break; // only allow in privileged code 1995 return _method_LambdaForm_Compiled; 1996 } 1997 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 1998 if (_location != _in_method) break; // only allow for methods 1999 if (!privileged) break; // only allow in privileged code 2000 return _method_LambdaForm_Hidden; 2001 } 2002 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 2003 if (_location != _in_method) break; // only allow for methods 2004 if (!privileged) break; // only allow in privileged code 2005 return _method_HotSpotIntrinsicCandidate; 2006 } 2007 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2008 if (_location != _in_field) break; // only allow for fields 2009 if (!privileged) break; // only allow in privileged code 2010 return _field_Stable; 2011 } 2012 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2013 if (_location != _in_field && _location != _in_class) { 2014 break; // only allow for fields and classes 2015 } 2016 if (!EnableContended || (RestrictContended && !privileged)) { 2017 break; // honor privileges 2018 } 2019 return _jdk_internal_vm_annotation_Contended; 2020 } 2021 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2022 if (_location != _in_method) break; // only allow for methods 2023 if (RestrictReservedStack && !privileged) break; // honor privileges 2024 return _jdk_internal_vm_annotation_ReservedStackAccess; 2025 } 2026 default: { 2027 break; 2028 } 2029 } 2030 return AnnotationCollector::_unknown; 2031 } 2032 2033 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2034 if (is_contended()) 2035 f->set_contended_group(contended_group()); 2036 if (is_stable()) 2037 f->set_stable(true); 2038 } 2039 2040 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2041 // If there's an error deallocate metadata for field annotations 2042 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2043 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2044 } 2045 2046 void MethodAnnotationCollector::apply_to(methodHandle m) { 2047 if (has_annotation(_method_CallerSensitive)) 2048 m->set_caller_sensitive(true); 2049 if (has_annotation(_method_ForceInline)) 2050 m->set_force_inline(true); 2051 if (has_annotation(_method_DontInline)) 2052 m->set_dont_inline(true); 2053 if (has_annotation(_method_InjectedProfile)) 2054 m->set_has_injected_profile(true); 2055 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2056 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2057 if (has_annotation(_method_LambdaForm_Hidden)) 2058 m->set_hidden(true); 2059 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2060 m->set_intrinsic_candidate(true); 2061 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2062 m->set_has_reserved_stack_access(true); 2063 } 2064 2065 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2066 assert(ik != NULL, "invariant"); 2067 ik->set_is_contended(is_contended()); 2068 } 2069 2070 #define MAX_ARGS_SIZE 255 2071 #define MAX_CODE_SIZE 65535 2072 #define INITIAL_MAX_LVT_NUMBER 256 2073 2074 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2075 * 2076 * Rules for LVT's and LVTT's are: 2077 * - There can be any number of LVT's and LVTT's. 2078 * - If there are n LVT's, it is the same as if there was just 2079 * one LVT containing all the entries from the n LVT's. 2080 * - There may be no more than one LVT entry per local variable. 2081 * Two LVT entries are 'equal' if these fields are the same: 2082 * start_pc, length, name, slot 2083 * - There may be no more than one LVTT entry per each LVT entry. 2084 * Each LVTT entry has to match some LVT entry. 2085 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2086 */ 2087 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2088 int lvt_cnt, 2089 u2* const localvariable_table_length, 2090 const u2**const localvariable_table_start, 2091 int lvtt_cnt, 2092 u2* const localvariable_type_table_length, 2093 const u2**const localvariable_type_table_start, 2094 TRAPS) { 2095 2096 ResourceMark rm(THREAD); 2097 2098 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2099 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2100 2101 LVT_HashTable* const table = new LVT_HashTable(); 2102 2103 // To fill LocalVariableTable in 2104 const Classfile_LVT_Element* cf_lvt; 2105 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2106 2107 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2108 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2109 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2110 copy_lvt_element(&cf_lvt[idx], lvt); 2111 // If no duplicates, add LVT elem in hashtable. 2112 if (table->put(*lvt, lvt) == false 2113 && _need_verify 2114 && _major_version >= JAVA_1_5_VERSION) { 2115 classfile_parse_error("Duplicated LocalVariableTable attribute " 2116 "entry for '%s' in class file %s", 2117 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2118 CHECK); 2119 } 2120 } 2121 } 2122 2123 // To merge LocalVariableTable and LocalVariableTypeTable 2124 const Classfile_LVT_Element* cf_lvtt; 2125 LocalVariableTableElement lvtt_elem; 2126 2127 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2128 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2129 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2130 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2131 LocalVariableTableElement** entry = table->get(lvtt_elem); 2132 if (entry == NULL) { 2133 if (_need_verify) { 2134 classfile_parse_error("LVTT entry for '%s' in class file %s " 2135 "does not match any LVT entry", 2136 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2137 CHECK); 2138 } 2139 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2140 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2141 "entry for '%s' in class file %s", 2142 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2143 CHECK); 2144 } else { 2145 // to add generic signatures into LocalVariableTable 2146 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2147 } 2148 } 2149 } 2150 } 2151 2152 2153 void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2154 const u1* runtime_visible_annotations, 2155 int runtime_visible_annotations_length, 2156 const u1* runtime_invisible_annotations, 2157 int runtime_invisible_annotations_length, 2158 const u1* runtime_visible_parameter_annotations, 2159 int runtime_visible_parameter_annotations_length, 2160 const u1* runtime_invisible_parameter_annotations, 2161 int runtime_invisible_parameter_annotations_length, 2162 const u1* runtime_visible_type_annotations, 2163 int runtime_visible_type_annotations_length, 2164 const u1* runtime_invisible_type_annotations, 2165 int runtime_invisible_type_annotations_length, 2166 const u1* annotation_default, 2167 int annotation_default_length, 2168 TRAPS) { 2169 2170 AnnotationArray* a; 2171 2172 if (runtime_visible_annotations_length + 2173 runtime_invisible_annotations_length > 0) { 2174 a = assemble_annotations(runtime_visible_annotations, 2175 runtime_visible_annotations_length, 2176 runtime_invisible_annotations, 2177 runtime_invisible_annotations_length, 2178 CHECK); 2179 cm->set_method_annotations(a); 2180 } 2181 2182 if (runtime_visible_parameter_annotations_length + 2183 runtime_invisible_parameter_annotations_length > 0) { 2184 a = assemble_annotations(runtime_visible_parameter_annotations, 2185 runtime_visible_parameter_annotations_length, 2186 runtime_invisible_parameter_annotations, 2187 runtime_invisible_parameter_annotations_length, 2188 CHECK); 2189 cm->set_parameter_annotations(a); 2190 } 2191 2192 if (annotation_default_length > 0) { 2193 a = assemble_annotations(annotation_default, 2194 annotation_default_length, 2195 NULL, 2196 0, 2197 CHECK); 2198 cm->set_default_annotations(a); 2199 } 2200 2201 if (runtime_visible_type_annotations_length + 2202 runtime_invisible_type_annotations_length > 0) { 2203 a = assemble_annotations(runtime_visible_type_annotations, 2204 runtime_visible_type_annotations_length, 2205 runtime_invisible_type_annotations, 2206 runtime_invisible_type_annotations_length, 2207 CHECK); 2208 cm->set_type_annotations(a); 2209 } 2210 } 2211 2212 2213 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2214 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2215 // Method* to save footprint, so we only know the size of the resulting Method* when the 2216 // entire method attribute is parsed. 2217 // 2218 // The promoted_flags parameter is used to pass relevant access_flags 2219 // from the method back up to the containing klass. These flag values 2220 // are added to klass's access_flags. 2221 2222 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2223 bool is_interface, 2224 const ConstantPool* cp, 2225 AccessFlags* const promoted_flags, 2226 TRAPS) { 2227 assert(cfs != NULL, "invariant"); 2228 assert(cp != NULL, "invariant"); 2229 assert(promoted_flags != NULL, "invariant"); 2230 2231 ResourceMark rm(THREAD); 2232 // Parse fixed parts: 2233 // access_flags, name_index, descriptor_index, attributes_count 2234 cfs->guarantee_more(8, CHECK_NULL); 2235 2236 int flags = cfs->get_u2_fast(); 2237 const u2 name_index = cfs->get_u2_fast(); 2238 const int cp_size = cp->length(); 2239 check_property( 2240 valid_symbol_at(name_index), 2241 "Illegal constant pool index %u for method name in class file %s", 2242 name_index, CHECK_NULL); 2243 const Symbol* const name = cp->symbol_at(name_index); 2244 verify_legal_method_name(name, CHECK_NULL); 2245 2246 const u2 signature_index = cfs->get_u2_fast(); 2247 guarantee_property( 2248 valid_symbol_at(signature_index), 2249 "Illegal constant pool index %u for method signature in class file %s", 2250 signature_index, CHECK_NULL); 2251 const Symbol* const signature = cp->symbol_at(signature_index); 2252 2253 if (name == vmSymbols::class_initializer_name()) { 2254 // We ignore the other access flags for a valid class initializer. 2255 // (JVM Spec 2nd ed., chapter 4.6) 2256 if (_major_version < 51) { // backward compatibility 2257 flags = JVM_ACC_STATIC; 2258 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2259 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2260 } else { 2261 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2262 } 2263 } else { 2264 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2265 } 2266 2267 if (name == vmSymbols::object_initializer_name() && is_interface) { 2268 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2269 } 2270 2271 int args_size = -1; // only used when _need_verify is true 2272 if (_need_verify) { 2273 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2274 verify_legal_method_signature(name, signature, CHECK_NULL); 2275 if (args_size > MAX_ARGS_SIZE) { 2276 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2277 } 2278 } 2279 2280 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2281 2282 // Default values for code and exceptions attribute elements 2283 u2 max_stack = 0; 2284 u2 max_locals = 0; 2285 u4 code_length = 0; 2286 const u1* code_start = 0; 2287 u2 exception_table_length = 0; 2288 const u2* exception_table_start = NULL; 2289 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2290 u2 checked_exceptions_length = 0; 2291 const u2* checked_exceptions_start = NULL; 2292 CompressedLineNumberWriteStream* linenumber_table = NULL; 2293 int linenumber_table_length = 0; 2294 int total_lvt_length = 0; 2295 u2 lvt_cnt = 0; 2296 u2 lvtt_cnt = 0; 2297 bool lvt_allocated = false; 2298 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2299 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2300 u2* localvariable_table_length = NULL; 2301 const u2** localvariable_table_start = NULL; 2302 u2* localvariable_type_table_length = NULL; 2303 const u2** localvariable_type_table_start = NULL; 2304 int method_parameters_length = -1; 2305 const u1* method_parameters_data = NULL; 2306 bool method_parameters_seen = false; 2307 bool parsed_code_attribute = false; 2308 bool parsed_checked_exceptions_attribute = false; 2309 bool parsed_stackmap_attribute = false; 2310 // stackmap attribute - JDK1.5 2311 const u1* stackmap_data = NULL; 2312 int stackmap_data_length = 0; 2313 u2 generic_signature_index = 0; 2314 MethodAnnotationCollector parsed_annotations; 2315 const u1* runtime_visible_annotations = NULL; 2316 int runtime_visible_annotations_length = 0; 2317 const u1* runtime_invisible_annotations = NULL; 2318 int runtime_invisible_annotations_length = 0; 2319 const u1* runtime_visible_parameter_annotations = NULL; 2320 int runtime_visible_parameter_annotations_length = 0; 2321 const u1* runtime_invisible_parameter_annotations = NULL; 2322 int runtime_invisible_parameter_annotations_length = 0; 2323 const u1* runtime_visible_type_annotations = NULL; 2324 int runtime_visible_type_annotations_length = 0; 2325 const u1* runtime_invisible_type_annotations = NULL; 2326 int runtime_invisible_type_annotations_length = 0; 2327 bool runtime_invisible_annotations_exists = false; 2328 bool runtime_invisible_type_annotations_exists = false; 2329 bool runtime_invisible_parameter_annotations_exists = false; 2330 const u1* annotation_default = NULL; 2331 int annotation_default_length = 0; 2332 2333 // Parse code and exceptions attribute 2334 u2 method_attributes_count = cfs->get_u2_fast(); 2335 while (method_attributes_count--) { 2336 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2337 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2338 const u4 method_attribute_length = cfs->get_u4_fast(); 2339 check_property( 2340 valid_symbol_at(method_attribute_name_index), 2341 "Invalid method attribute name index %u in class file %s", 2342 method_attribute_name_index, CHECK_NULL); 2343 2344 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2345 if (method_attribute_name == vmSymbols::tag_code()) { 2346 // Parse Code attribute 2347 if (_need_verify) { 2348 guarantee_property( 2349 !access_flags.is_native() && !access_flags.is_abstract(), 2350 "Code attribute in native or abstract methods in class file %s", 2351 CHECK_NULL); 2352 } 2353 if (parsed_code_attribute) { 2354 classfile_parse_error("Multiple Code attributes in class file %s", 2355 CHECK_NULL); 2356 } 2357 parsed_code_attribute = true; 2358 2359 // Stack size, locals size, and code size 2360 if (_major_version == 45 && _minor_version <= 2) { 2361 cfs->guarantee_more(4, CHECK_NULL); 2362 max_stack = cfs->get_u1_fast(); 2363 max_locals = cfs->get_u1_fast(); 2364 code_length = cfs->get_u2_fast(); 2365 } else { 2366 cfs->guarantee_more(8, CHECK_NULL); 2367 max_stack = cfs->get_u2_fast(); 2368 max_locals = cfs->get_u2_fast(); 2369 code_length = cfs->get_u4_fast(); 2370 } 2371 if (_need_verify) { 2372 guarantee_property(args_size <= max_locals, 2373 "Arguments can't fit into locals in class file %s", 2374 CHECK_NULL); 2375 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2376 "Invalid method Code length %u in class file %s", 2377 code_length, CHECK_NULL); 2378 } 2379 // Code pointer 2380 code_start = cfs->get_u1_buffer(); 2381 assert(code_start != NULL, "null code start"); 2382 cfs->guarantee_more(code_length, CHECK_NULL); 2383 cfs->skip_u1_fast(code_length); 2384 2385 // Exception handler table 2386 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2387 exception_table_length = cfs->get_u2_fast(); 2388 if (exception_table_length > 0) { 2389 exception_table_start = parse_exception_table(cfs, 2390 code_length, 2391 exception_table_length, 2392 CHECK_NULL); 2393 } 2394 2395 // Parse additional attributes in code attribute 2396 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2397 u2 code_attributes_count = cfs->get_u2_fast(); 2398 2399 unsigned int calculated_attribute_length = 0; 2400 2401 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2402 calculated_attribute_length = 2403 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2404 } else { 2405 // max_stack, locals and length are smaller in pre-version 45.2 classes 2406 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2407 } 2408 calculated_attribute_length += 2409 code_length + 2410 sizeof(exception_table_length) + 2411 sizeof(code_attributes_count) + 2412 exception_table_length * 2413 ( sizeof(u2) + // start_pc 2414 sizeof(u2) + // end_pc 2415 sizeof(u2) + // handler_pc 2416 sizeof(u2) ); // catch_type_index 2417 2418 while (code_attributes_count--) { 2419 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2420 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2421 const u4 code_attribute_length = cfs->get_u4_fast(); 2422 calculated_attribute_length += code_attribute_length + 2423 sizeof(code_attribute_name_index) + 2424 sizeof(code_attribute_length); 2425 check_property(valid_symbol_at(code_attribute_name_index), 2426 "Invalid code attribute name index %u in class file %s", 2427 code_attribute_name_index, 2428 CHECK_NULL); 2429 if (LoadLineNumberTables && 2430 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2431 // Parse and compress line number table 2432 parse_linenumber_table(code_attribute_length, 2433 code_length, 2434 &linenumber_table, 2435 CHECK_NULL); 2436 2437 } else if (LoadLocalVariableTables && 2438 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2439 // Parse local variable table 2440 if (!lvt_allocated) { 2441 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2442 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2443 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2444 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2445 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2446 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2447 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2448 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2449 lvt_allocated = true; 2450 } 2451 if (lvt_cnt == max_lvt_cnt) { 2452 max_lvt_cnt <<= 1; 2453 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2454 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2455 } 2456 localvariable_table_start[lvt_cnt] = 2457 parse_localvariable_table(cfs, 2458 code_length, 2459 max_locals, 2460 code_attribute_length, 2461 &localvariable_table_length[lvt_cnt], 2462 false, // is not LVTT 2463 CHECK_NULL); 2464 total_lvt_length += localvariable_table_length[lvt_cnt]; 2465 lvt_cnt++; 2466 } else if (LoadLocalVariableTypeTables && 2467 _major_version >= JAVA_1_5_VERSION && 2468 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2469 if (!lvt_allocated) { 2470 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2471 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2472 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2473 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2474 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2475 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2476 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2477 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2478 lvt_allocated = true; 2479 } 2480 // Parse local variable type table 2481 if (lvtt_cnt == max_lvtt_cnt) { 2482 max_lvtt_cnt <<= 1; 2483 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2484 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2485 } 2486 localvariable_type_table_start[lvtt_cnt] = 2487 parse_localvariable_table(cfs, 2488 code_length, 2489 max_locals, 2490 code_attribute_length, 2491 &localvariable_type_table_length[lvtt_cnt], 2492 true, // is LVTT 2493 CHECK_NULL); 2494 lvtt_cnt++; 2495 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2496 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2497 // Stack map is only needed by the new verifier in JDK1.5. 2498 if (parsed_stackmap_attribute) { 2499 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2500 } 2501 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2502 stackmap_data_length = code_attribute_length; 2503 parsed_stackmap_attribute = true; 2504 } else { 2505 // Skip unknown attributes 2506 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2507 } 2508 } 2509 // check method attribute length 2510 if (_need_verify) { 2511 guarantee_property(method_attribute_length == calculated_attribute_length, 2512 "Code segment has wrong length in class file %s", 2513 CHECK_NULL); 2514 } 2515 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2516 // Parse Exceptions attribute 2517 if (parsed_checked_exceptions_attribute) { 2518 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2519 CHECK_NULL); 2520 } 2521 parsed_checked_exceptions_attribute = true; 2522 checked_exceptions_start = 2523 parse_checked_exceptions(cfs, 2524 &checked_exceptions_length, 2525 method_attribute_length, 2526 CHECK_NULL); 2527 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2528 // reject multiple method parameters 2529 if (method_parameters_seen) { 2530 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2531 CHECK_NULL); 2532 } 2533 method_parameters_seen = true; 2534 method_parameters_length = cfs->get_u1_fast(); 2535 const u2 real_length = (method_parameters_length * 4u) + 1u; 2536 if (method_attribute_length != real_length) { 2537 classfile_parse_error( 2538 "Invalid MethodParameters method attribute length %u in class file", 2539 method_attribute_length, CHECK_NULL); 2540 } 2541 method_parameters_data = cfs->get_u1_buffer(); 2542 cfs->skip_u2_fast(method_parameters_length); 2543 cfs->skip_u2_fast(method_parameters_length); 2544 // ignore this attribute if it cannot be reflected 2545 if (!SystemDictionary::Parameter_klass_loaded()) 2546 method_parameters_length = -1; 2547 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2548 if (method_attribute_length != 0) { 2549 classfile_parse_error( 2550 "Invalid Synthetic method attribute length %u in class file %s", 2551 method_attribute_length, CHECK_NULL); 2552 } 2553 // Should we check that there hasn't already been a synthetic attribute? 2554 access_flags.set_is_synthetic(); 2555 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2556 if (method_attribute_length != 0) { 2557 classfile_parse_error( 2558 "Invalid Deprecated method attribute length %u in class file %s", 2559 method_attribute_length, CHECK_NULL); 2560 } 2561 } else if (_major_version >= JAVA_1_5_VERSION) { 2562 if (method_attribute_name == vmSymbols::tag_signature()) { 2563 if (method_attribute_length != 2) { 2564 classfile_parse_error( 2565 "Invalid Signature attribute length %u in class file %s", 2566 method_attribute_length, CHECK_NULL); 2567 } 2568 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2569 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2570 if (runtime_visible_annotations != NULL) { 2571 classfile_parse_error( 2572 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2573 CHECK_NULL); 2574 } 2575 runtime_visible_annotations_length = method_attribute_length; 2576 runtime_visible_annotations = cfs->get_u1_buffer(); 2577 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2578 parse_annotations(cp, 2579 runtime_visible_annotations, 2580 runtime_visible_annotations_length, 2581 &parsed_annotations, 2582 _loader_data, 2583 CHECK_NULL); 2584 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL); 2585 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2586 if (runtime_invisible_annotations_exists) { 2587 classfile_parse_error( 2588 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2589 CHECK_NULL); 2590 } 2591 runtime_invisible_annotations_exists = true; 2592 if (PreserveAllAnnotations) { 2593 runtime_invisible_annotations_length = method_attribute_length; 2594 runtime_invisible_annotations = cfs->get_u1_buffer(); 2595 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2596 } 2597 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2598 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2599 if (runtime_visible_parameter_annotations != NULL) { 2600 classfile_parse_error( 2601 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2602 CHECK_NULL); 2603 } 2604 runtime_visible_parameter_annotations_length = method_attribute_length; 2605 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2606 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2607 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2608 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2609 if (runtime_invisible_parameter_annotations_exists) { 2610 classfile_parse_error( 2611 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2612 CHECK_NULL); 2613 } 2614 runtime_invisible_parameter_annotations_exists = true; 2615 if (PreserveAllAnnotations) { 2616 runtime_invisible_parameter_annotations_length = method_attribute_length; 2617 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2618 assert(runtime_invisible_parameter_annotations != NULL, 2619 "null invisible parameter annotations"); 2620 } 2621 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2622 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2623 if (annotation_default != NULL) { 2624 classfile_parse_error( 2625 "Multiple AnnotationDefault attributes for method in class file %s", 2626 CHECK_NULL); 2627 } 2628 annotation_default_length = method_attribute_length; 2629 annotation_default = cfs->get_u1_buffer(); 2630 assert(annotation_default != NULL, "null annotation default"); 2631 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2632 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2633 if (runtime_visible_type_annotations != NULL) { 2634 classfile_parse_error( 2635 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2636 CHECK_NULL); 2637 } 2638 runtime_visible_type_annotations_length = method_attribute_length; 2639 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2640 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2641 // No need for the VM to parse Type annotations 2642 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2643 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2644 if (runtime_invisible_type_annotations_exists) { 2645 classfile_parse_error( 2646 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2647 CHECK_NULL); 2648 } else { 2649 runtime_invisible_type_annotations_exists = true; 2650 } 2651 if (PreserveAllAnnotations) { 2652 runtime_invisible_type_annotations_length = method_attribute_length; 2653 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2654 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2655 } 2656 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2657 } else { 2658 // Skip unknown attributes 2659 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2660 } 2661 } else { 2662 // Skip unknown attributes 2663 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2664 } 2665 } 2666 2667 if (linenumber_table != NULL) { 2668 linenumber_table->write_terminator(); 2669 linenumber_table_length = linenumber_table->position(); 2670 } 2671 2672 // Make sure there's at least one Code attribute in non-native/non-abstract method 2673 if (_need_verify) { 2674 guarantee_property(access_flags.is_native() || 2675 access_flags.is_abstract() || 2676 parsed_code_attribute, 2677 "Absent Code attribute in method that is not native or abstract in class file %s", 2678 CHECK_NULL); 2679 } 2680 2681 // All sizing information for a Method* is finally available, now create it 2682 InlineTableSizes sizes( 2683 total_lvt_length, 2684 linenumber_table_length, 2685 exception_table_length, 2686 checked_exceptions_length, 2687 method_parameters_length, 2688 generic_signature_index, 2689 runtime_visible_annotations_length + 2690 runtime_invisible_annotations_length, 2691 runtime_visible_parameter_annotations_length + 2692 runtime_invisible_parameter_annotations_length, 2693 runtime_visible_type_annotations_length + 2694 runtime_invisible_type_annotations_length, 2695 annotation_default_length, 2696 0); 2697 2698 Method* const m = Method::allocate(_loader_data, 2699 code_length, 2700 access_flags, 2701 &sizes, 2702 ConstMethod::NORMAL, 2703 CHECK_NULL); 2704 2705 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2706 2707 // Fill in information from fixed part (access_flags already set) 2708 m->set_constants(_cp); 2709 m->set_name_index(name_index); 2710 m->set_signature_index(signature_index); 2711 2712 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2713 m->constMethod()->set_result_type(rtf.type()); 2714 2715 if (args_size >= 0) { 2716 m->set_size_of_parameters(args_size); 2717 } else { 2718 m->compute_size_of_parameters(THREAD); 2719 } 2720 #ifdef ASSERT 2721 if (args_size >= 0) { 2722 m->compute_size_of_parameters(THREAD); 2723 assert(args_size == m->size_of_parameters(), ""); 2724 } 2725 #endif 2726 2727 // Fill in code attribute information 2728 m->set_max_stack(max_stack); 2729 m->set_max_locals(max_locals); 2730 if (stackmap_data != NULL) { 2731 m->constMethod()->copy_stackmap_data(_loader_data, 2732 (u1*)stackmap_data, 2733 stackmap_data_length, 2734 CHECK_NULL); 2735 } 2736 2737 // Copy byte codes 2738 m->set_code((u1*)code_start); 2739 2740 // Copy line number table 2741 if (linenumber_table != NULL) { 2742 memcpy(m->compressed_linenumber_table(), 2743 linenumber_table->buffer(), 2744 linenumber_table_length); 2745 } 2746 2747 // Copy exception table 2748 if (exception_table_length > 0) { 2749 int size = 2750 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); 2751 copy_u2_with_conversion((u2*) m->exception_table_start(), 2752 exception_table_start, size); 2753 } 2754 2755 // Copy method parameters 2756 if (method_parameters_length > 0) { 2757 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2758 for (int i = 0; i < method_parameters_length; i++) { 2759 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2760 method_parameters_data += 2; 2761 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2762 method_parameters_data += 2; 2763 } 2764 } 2765 2766 // Copy checked exceptions 2767 if (checked_exceptions_length > 0) { 2768 const int size = 2769 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2770 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), 2771 checked_exceptions_start, 2772 size); 2773 } 2774 2775 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2776 if (total_lvt_length > 0) { 2777 promoted_flags->set_has_localvariable_table(); 2778 copy_localvariable_table(m->constMethod(), 2779 lvt_cnt, 2780 localvariable_table_length, 2781 localvariable_table_start, 2782 lvtt_cnt, 2783 localvariable_type_table_length, 2784 localvariable_type_table_start, 2785 CHECK_NULL); 2786 } 2787 2788 if (parsed_annotations.has_any_annotations()) 2789 parsed_annotations.apply_to(m); 2790 2791 // Copy annotations 2792 copy_method_annotations(m->constMethod(), 2793 runtime_visible_annotations, 2794 runtime_visible_annotations_length, 2795 runtime_invisible_annotations, 2796 runtime_invisible_annotations_length, 2797 runtime_visible_parameter_annotations, 2798 runtime_visible_parameter_annotations_length, 2799 runtime_invisible_parameter_annotations, 2800 runtime_invisible_parameter_annotations_length, 2801 runtime_visible_type_annotations, 2802 runtime_visible_type_annotations_length, 2803 runtime_invisible_type_annotations, 2804 runtime_invisible_type_annotations_length, 2805 annotation_default, 2806 annotation_default_length, 2807 CHECK_NULL); 2808 2809 if (name == vmSymbols::finalize_method_name() && 2810 signature == vmSymbols::void_method_signature()) { 2811 if (m->is_empty_method()) { 2812 _has_empty_finalizer = true; 2813 } else { 2814 _has_finalizer = true; 2815 } 2816 } 2817 if (name == vmSymbols::object_initializer_name() && 2818 signature == vmSymbols::void_method_signature() && 2819 m->is_vanilla_constructor()) { 2820 _has_vanilla_constructor = true; 2821 } 2822 2823 NOT_PRODUCT(m->verify()); 2824 return m; 2825 } 2826 2827 2828 // The promoted_flags parameter is used to pass relevant access_flags 2829 // from the methods back up to the containing klass. These flag values 2830 // are added to klass's access_flags. 2831 // Side-effects: populates the _methods field in the parser 2832 void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2833 bool is_interface, 2834 AccessFlags* promoted_flags, 2835 bool* has_final_method, 2836 bool* declares_default_methods, 2837 TRAPS) { 2838 assert(cfs != NULL, "invariant"); 2839 assert(promoted_flags != NULL, "invariant"); 2840 assert(has_final_method != NULL, "invariant"); 2841 assert(declares_default_methods != NULL, "invariant"); 2842 2843 assert(NULL == _methods, "invariant"); 2844 2845 cfs->guarantee_more(2, CHECK); // length 2846 const u2 length = cfs->get_u2_fast(); 2847 if (length == 0) { 2848 _methods = Universe::the_empty_method_array(); 2849 } else { 2850 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2851 length, 2852 NULL, 2853 CHECK); 2854 2855 HandleMark hm(THREAD); 2856 for (int index = 0; index < length; index++) { 2857 Method* method = parse_method(cfs, 2858 is_interface, 2859 _cp, 2860 promoted_flags, 2861 CHECK); 2862 2863 if (method->is_final()) { 2864 *has_final_method = true; 2865 } 2866 // declares_default_methods: declares concrete instance methods, any access flags 2867 // used for interface initialization, and default method inheritance analysis 2868 if (is_interface && !(*declares_default_methods) 2869 && !method->is_abstract() && !method->is_static()) { 2870 *declares_default_methods = true; 2871 } 2872 _methods->at_put(index, method); 2873 } 2874 2875 if (_need_verify && length > 1) { 2876 // Check duplicated methods 2877 ResourceMark rm(THREAD); 2878 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2879 THREAD, NameSigHash*, HASH_ROW_SIZE); 2880 initialize_hashtable(names_and_sigs); 2881 bool dup = false; 2882 { 2883 debug_only(NoSafepointVerifier nsv;) 2884 for (int i = 0; i < length; i++) { 2885 const Method* const m = _methods->at(i); 2886 // If no duplicates, add name/signature in hashtable names_and_sigs. 2887 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { 2888 dup = true; 2889 break; 2890 } 2891 } 2892 } 2893 if (dup) { 2894 classfile_parse_error("Duplicate method name&signature in class file %s", 2895 CHECK); 2896 } 2897 } 2898 } 2899 } 2900 2901 static const intArray* sort_methods(Array<Method*>* methods) { 2902 const int length = methods->length(); 2903 // If JVMTI original method ordering or sharing is enabled we have to 2904 // remember the original class file ordering. 2905 // We temporarily use the vtable_index field in the Method* to store the 2906 // class file index, so we can read in after calling qsort. 2907 // Put the method ordering in the shared archive. 2908 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2909 for (int index = 0; index < length; index++) { 2910 Method* const m = methods->at(index); 2911 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2912 m->set_vtable_index(index); 2913 } 2914 } 2915 // Sort method array by ascending method name (for faster lookups & vtable construction) 2916 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2917 Method::sort_methods(methods); 2918 2919 intArray* method_ordering = NULL; 2920 // If JVMTI original method ordering or sharing is enabled construct int 2921 // array remembering the original ordering 2922 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2923 method_ordering = new intArray(length, length, -1); 2924 for (int index = 0; index < length; index++) { 2925 Method* const m = methods->at(index); 2926 const int old_index = m->vtable_index(); 2927 assert(old_index >= 0 && old_index < length, "invalid method index"); 2928 method_ordering->at_put(index, old_index); 2929 m->set_vtable_index(Method::invalid_vtable_index); 2930 } 2931 } 2932 return method_ordering; 2933 } 2934 2935 // Parse generic_signature attribute for methods and fields 2936 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 2937 TRAPS) { 2938 assert(cfs != NULL, "invariant"); 2939 2940 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 2941 const u2 generic_signature_index = cfs->get_u2_fast(); 2942 check_property( 2943 valid_symbol_at(generic_signature_index), 2944 "Invalid Signature attribute at constant pool index %u in class file %s", 2945 generic_signature_index, CHECK_0); 2946 return generic_signature_index; 2947 } 2948 2949 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 2950 TRAPS) { 2951 2952 assert(cfs != NULL, "invariant"); 2953 2954 cfs->guarantee_more(2, CHECK); // sourcefile_index 2955 const u2 sourcefile_index = cfs->get_u2_fast(); 2956 check_property( 2957 valid_symbol_at(sourcefile_index), 2958 "Invalid SourceFile attribute at constant pool index %u in class file %s", 2959 sourcefile_index, CHECK); 2960 set_class_sourcefile_index(sourcefile_index); 2961 } 2962 2963 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 2964 int length, 2965 TRAPS) { 2966 assert(cfs != NULL, "invariant"); 2967 2968 const u1* const sde_buffer = cfs->get_u1_buffer(); 2969 assert(sde_buffer != NULL, "null sde buffer"); 2970 2971 // Don't bother storing it if there is no way to retrieve it 2972 if (JvmtiExport::can_get_source_debug_extension()) { 2973 assert((length+1) > length, "Overflow checking"); 2974 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 2975 for (int i = 0; i < length; i++) { 2976 sde[i] = sde_buffer[i]; 2977 } 2978 sde[length] = '\0'; 2979 set_class_sde_buffer((const char*)sde, length); 2980 } 2981 // Got utf8 string, set stream position forward 2982 cfs->skip_u1(length, CHECK); 2983 } 2984 2985 2986 // Inner classes can be static, private or protected (classic VM does this) 2987 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 2988 JVM_ACC_PRIVATE | \ 2989 JVM_ACC_PROTECTED | \ 2990 JVM_ACC_STATIC \ 2991 ) 2992 2993 // Return number of classes in the inner classes attribute table 2994 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 2995 const u1* const inner_classes_attribute_start, 2996 bool parsed_enclosingmethod_attribute, 2997 u2 enclosing_method_class_index, 2998 u2 enclosing_method_method_index, 2999 TRAPS) { 3000 const u1* const current_mark = cfs->current(); 3001 u2 length = 0; 3002 if (inner_classes_attribute_start != NULL) { 3003 cfs->set_current(inner_classes_attribute_start); 3004 cfs->guarantee_more(2, CHECK_0); // length 3005 length = cfs->get_u2_fast(); 3006 } 3007 3008 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3009 // method data: 3010 // [inner_class_info_index, 3011 // outer_class_info_index, 3012 // inner_name_index, 3013 // inner_class_access_flags, 3014 // ... 3015 // enclosing_method_class_index, 3016 // enclosing_method_method_index] 3017 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3018 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3019 _inner_classes = inner_classes; 3020 3021 int index = 0; 3022 const int cp_size = _cp->length(); 3023 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3024 for (int n = 0; n < length; n++) { 3025 // Inner class index 3026 const u2 inner_class_info_index = cfs->get_u2_fast(); 3027 check_property( 3028 valid_klass_reference_at(inner_class_info_index), 3029 "inner_class_info_index %u has bad constant type in class file %s", 3030 inner_class_info_index, CHECK_0); 3031 // Outer class index 3032 const u2 outer_class_info_index = cfs->get_u2_fast(); 3033 check_property( 3034 outer_class_info_index == 0 || 3035 valid_klass_reference_at(outer_class_info_index), 3036 "outer_class_info_index %u has bad constant type in class file %s", 3037 outer_class_info_index, CHECK_0); 3038 // Inner class name 3039 const u2 inner_name_index = cfs->get_u2_fast(); 3040 check_property( 3041 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3042 "inner_name_index %u has bad constant type in class file %s", 3043 inner_name_index, CHECK_0); 3044 if (_need_verify) { 3045 guarantee_property(inner_class_info_index != outer_class_info_index, 3046 "Class is both outer and inner class in class file %s", CHECK_0); 3047 } 3048 // Access flags 3049 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3050 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3051 // Set abstract bit for old class files for backward compatibility 3052 flags |= JVM_ACC_ABSTRACT; 3053 } 3054 verify_legal_class_modifiers(flags, CHECK_0); 3055 AccessFlags inner_access_flags(flags); 3056 3057 inner_classes->at_put(index++, inner_class_info_index); 3058 inner_classes->at_put(index++, outer_class_info_index); 3059 inner_classes->at_put(index++, inner_name_index); 3060 inner_classes->at_put(index++, inner_access_flags.as_short()); 3061 } 3062 3063 // 4347400: make sure there's no duplicate entry in the classes array 3064 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3065 for(int i = 0; i < length * 4; i += 4) { 3066 for(int j = i + 4; j < length * 4; j += 4) { 3067 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3068 inner_classes->at(i+1) != inner_classes->at(j+1) || 3069 inner_classes->at(i+2) != inner_classes->at(j+2) || 3070 inner_classes->at(i+3) != inner_classes->at(j+3)), 3071 "Duplicate entry in InnerClasses in class file %s", 3072 CHECK_0); 3073 } 3074 } 3075 } 3076 3077 // Set EnclosingMethod class and method indexes. 3078 if (parsed_enclosingmethod_attribute) { 3079 inner_classes->at_put(index++, enclosing_method_class_index); 3080 inner_classes->at_put(index++, enclosing_method_method_index); 3081 } 3082 assert(index == size, "wrong size"); 3083 3084 // Restore buffer's current position. 3085 cfs->set_current(current_mark); 3086 3087 return length; 3088 } 3089 3090 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3091 set_class_synthetic_flag(true); 3092 } 3093 3094 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3095 assert(cfs != NULL, "invariant"); 3096 3097 const u2 signature_index = cfs->get_u2(CHECK); 3098 check_property( 3099 valid_symbol_at(signature_index), 3100 "Invalid constant pool index %u in Signature attribute in class file %s", 3101 signature_index, CHECK); 3102 set_class_generic_signature_index(signature_index); 3103 } 3104 3105 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3106 ConstantPool* cp, 3107 u4 attribute_byte_length, 3108 TRAPS) { 3109 assert(cfs != NULL, "invariant"); 3110 assert(cp != NULL, "invariant"); 3111 3112 const u1* const current_start = cfs->current(); 3113 3114 guarantee_property(attribute_byte_length >= sizeof(u2), 3115 "Invalid BootstrapMethods attribute length %u in class file %s", 3116 attribute_byte_length, 3117 CHECK); 3118 3119 cfs->guarantee_more(attribute_byte_length, CHECK); 3120 3121 const int attribute_array_length = cfs->get_u2_fast(); 3122 3123 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3124 "Short length on BootstrapMethods in class file %s", 3125 CHECK); 3126 3127 3128 // The attribute contains a counted array of counted tuples of shorts, 3129 // represending bootstrap specifiers: 3130 // length*{bootstrap_method_index, argument_count*{argument_index}} 3131 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3132 // operand_count = number of shorts in attr, except for leading length 3133 3134 // The attribute is copied into a short[] array. 3135 // The array begins with a series of short[2] pairs, one for each tuple. 3136 const int index_size = (attribute_array_length * 2); 3137 3138 Array<u2>* const operands = 3139 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3140 3141 // Eagerly assign operands so they will be deallocated with the constant 3142 // pool if there is an error. 3143 cp->set_operands(operands); 3144 3145 int operand_fill_index = index_size; 3146 const int cp_size = cp->length(); 3147 3148 for (int n = 0; n < attribute_array_length; n++) { 3149 // Store a 32-bit offset into the header of the operand array. 3150 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3151 3152 // Read a bootstrap specifier. 3153 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3154 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3155 const u2 argument_count = cfs->get_u2_fast(); 3156 check_property( 3157 valid_cp_range(bootstrap_method_index, cp_size) && 3158 cp->tag_at(bootstrap_method_index).is_method_handle(), 3159 "bootstrap_method_index %u has bad constant type in class file %s", 3160 bootstrap_method_index, 3161 CHECK); 3162 3163 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3164 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3165 CHECK); 3166 3167 operands->at_put(operand_fill_index++, bootstrap_method_index); 3168 operands->at_put(operand_fill_index++, argument_count); 3169 3170 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3171 for (int j = 0; j < argument_count; j++) { 3172 const u2 argument_index = cfs->get_u2_fast(); 3173 check_property( 3174 valid_cp_range(argument_index, cp_size) && 3175 cp->tag_at(argument_index).is_loadable_constant(), 3176 "argument_index %u has bad constant type in class file %s", 3177 argument_index, 3178 CHECK); 3179 operands->at_put(operand_fill_index++, argument_index); 3180 } 3181 } 3182 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3183 "Bad length on BootstrapMethods in class file %s", 3184 CHECK); 3185 } 3186 3187 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3188 ConstantPool* cp, 3189 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3190 TRAPS) { 3191 assert(cfs != NULL, "invariant"); 3192 assert(cp != NULL, "invariant"); 3193 assert(parsed_annotations != NULL, "invariant"); 3194 3195 // Set inner classes attribute to default sentinel 3196 _inner_classes = Universe::the_empty_short_array(); 3197 cfs->guarantee_more(2, CHECK); // attributes_count 3198 u2 attributes_count = cfs->get_u2_fast(); 3199 bool parsed_sourcefile_attribute = false; 3200 bool parsed_innerclasses_attribute = false; 3201 bool parsed_enclosingmethod_attribute = false; 3202 bool parsed_bootstrap_methods_attribute = false; 3203 const u1* runtime_visible_annotations = NULL; 3204 int runtime_visible_annotations_length = 0; 3205 const u1* runtime_invisible_annotations = NULL; 3206 int runtime_invisible_annotations_length = 0; 3207 const u1* runtime_visible_type_annotations = NULL; 3208 int runtime_visible_type_annotations_length = 0; 3209 const u1* runtime_invisible_type_annotations = NULL; 3210 int runtime_invisible_type_annotations_length = 0; 3211 bool runtime_invisible_type_annotations_exists = false; 3212 bool runtime_invisible_annotations_exists = false; 3213 bool parsed_source_debug_ext_annotations_exist = false; 3214 const u1* inner_classes_attribute_start = NULL; 3215 u4 inner_classes_attribute_length = 0; 3216 u2 enclosing_method_class_index = 0; 3217 u2 enclosing_method_method_index = 0; 3218 // Iterate over attributes 3219 while (attributes_count--) { 3220 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3221 const u2 attribute_name_index = cfs->get_u2_fast(); 3222 const u4 attribute_length = cfs->get_u4_fast(); 3223 check_property( 3224 valid_symbol_at(attribute_name_index), 3225 "Attribute name has bad constant pool index %u in class file %s", 3226 attribute_name_index, CHECK); 3227 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3228 if (tag == vmSymbols::tag_source_file()) { 3229 // Check for SourceFile tag 3230 if (_need_verify) { 3231 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3232 } 3233 if (parsed_sourcefile_attribute) { 3234 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3235 } else { 3236 parsed_sourcefile_attribute = true; 3237 } 3238 parse_classfile_sourcefile_attribute(cfs, CHECK); 3239 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3240 // Check for SourceDebugExtension tag 3241 if (parsed_source_debug_ext_annotations_exist) { 3242 classfile_parse_error( 3243 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3244 } 3245 parsed_source_debug_ext_annotations_exist = true; 3246 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3247 } else if (tag == vmSymbols::tag_inner_classes()) { 3248 // Check for InnerClasses tag 3249 if (parsed_innerclasses_attribute) { 3250 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3251 } else { 3252 parsed_innerclasses_attribute = true; 3253 } 3254 inner_classes_attribute_start = cfs->get_u1_buffer(); 3255 inner_classes_attribute_length = attribute_length; 3256 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3257 } else if (tag == vmSymbols::tag_synthetic()) { 3258 // Check for Synthetic tag 3259 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3260 if (attribute_length != 0) { 3261 classfile_parse_error( 3262 "Invalid Synthetic classfile attribute length %u in class file %s", 3263 attribute_length, CHECK); 3264 } 3265 parse_classfile_synthetic_attribute(CHECK); 3266 } else if (tag == vmSymbols::tag_deprecated()) { 3267 // Check for Deprecatd tag - 4276120 3268 if (attribute_length != 0) { 3269 classfile_parse_error( 3270 "Invalid Deprecated classfile attribute length %u in class file %s", 3271 attribute_length, CHECK); 3272 } 3273 } else if (_major_version >= JAVA_1_5_VERSION) { 3274 if (tag == vmSymbols::tag_signature()) { 3275 if (attribute_length != 2) { 3276 classfile_parse_error( 3277 "Wrong Signature attribute length %u in class file %s", 3278 attribute_length, CHECK); 3279 } 3280 parse_classfile_signature_attribute(cfs, CHECK); 3281 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3282 if (runtime_visible_annotations != NULL) { 3283 classfile_parse_error( 3284 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3285 } 3286 runtime_visible_annotations_length = attribute_length; 3287 runtime_visible_annotations = cfs->get_u1_buffer(); 3288 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3289 parse_annotations(cp, 3290 runtime_visible_annotations, 3291 runtime_visible_annotations_length, 3292 parsed_annotations, 3293 _loader_data, 3294 CHECK); 3295 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 3296 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3297 if (runtime_invisible_annotations_exists) { 3298 classfile_parse_error( 3299 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3300 } 3301 runtime_invisible_annotations_exists = true; 3302 if (PreserveAllAnnotations) { 3303 runtime_invisible_annotations_length = attribute_length; 3304 runtime_invisible_annotations = cfs->get_u1_buffer(); 3305 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3306 } 3307 cfs->skip_u1(attribute_length, CHECK); 3308 } else if (tag == vmSymbols::tag_enclosing_method()) { 3309 if (parsed_enclosingmethod_attribute) { 3310 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3311 } else { 3312 parsed_enclosingmethod_attribute = true; 3313 } 3314 guarantee_property(attribute_length == 4, 3315 "Wrong EnclosingMethod attribute length %u in class file %s", 3316 attribute_length, CHECK); 3317 cfs->guarantee_more(4, CHECK); // class_index, method_index 3318 enclosing_method_class_index = cfs->get_u2_fast(); 3319 enclosing_method_method_index = cfs->get_u2_fast(); 3320 if (enclosing_method_class_index == 0) { 3321 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3322 } 3323 // Validate the constant pool indices and types 3324 check_property(valid_klass_reference_at(enclosing_method_class_index), 3325 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3326 if (enclosing_method_method_index != 0 && 3327 (!cp->is_within_bounds(enclosing_method_method_index) || 3328 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3329 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3330 } 3331 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3332 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3333 if (parsed_bootstrap_methods_attribute) { 3334 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3335 } 3336 parsed_bootstrap_methods_attribute = true; 3337 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3338 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3339 if (runtime_visible_type_annotations != NULL) { 3340 classfile_parse_error( 3341 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3342 } 3343 runtime_visible_type_annotations_length = attribute_length; 3344 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3345 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3346 // No need for the VM to parse Type annotations 3347 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3348 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3349 if (runtime_invisible_type_annotations_exists) { 3350 classfile_parse_error( 3351 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3352 } else { 3353 runtime_invisible_type_annotations_exists = true; 3354 } 3355 if (PreserveAllAnnotations) { 3356 runtime_invisible_type_annotations_length = attribute_length; 3357 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3358 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3359 } 3360 cfs->skip_u1(attribute_length, CHECK); 3361 } else { 3362 // Unknown attribute 3363 cfs->skip_u1(attribute_length, CHECK); 3364 } 3365 } else { 3366 // Unknown attribute 3367 cfs->skip_u1(attribute_length, CHECK); 3368 } 3369 } 3370 _annotations = assemble_annotations(runtime_visible_annotations, 3371 runtime_visible_annotations_length, 3372 runtime_invisible_annotations, 3373 runtime_invisible_annotations_length, 3374 CHECK); 3375 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3376 runtime_visible_type_annotations_length, 3377 runtime_invisible_type_annotations, 3378 runtime_invisible_type_annotations_length, 3379 CHECK); 3380 3381 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3382 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3383 cfs, 3384 inner_classes_attribute_start, 3385 parsed_innerclasses_attribute, 3386 enclosing_method_class_index, 3387 enclosing_method_method_index, 3388 CHECK); 3389 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3390 guarantee_property( 3391 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3392 "Wrong InnerClasses attribute length in class file %s", CHECK); 3393 } 3394 } 3395 3396 if (_max_bootstrap_specifier_index >= 0) { 3397 guarantee_property(parsed_bootstrap_methods_attribute, 3398 "Missing BootstrapMethods attribute in class file %s", CHECK); 3399 } 3400 } 3401 3402 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3403 assert(k != NULL, "invariant"); 3404 3405 if (_synthetic_flag) 3406 k->set_is_synthetic(); 3407 if (_sourcefile_index != 0) { 3408 k->set_source_file_name_index(_sourcefile_index); 3409 } 3410 if (_generic_signature_index != 0) { 3411 k->set_generic_signature_index(_generic_signature_index); 3412 } 3413 if (_sde_buffer != NULL) { 3414 k->set_source_debug_extension(_sde_buffer, _sde_length); 3415 } 3416 } 3417 3418 // Create the Annotations object that will 3419 // hold the annotations array for the Klass. 3420 void ClassFileParser::create_combined_annotations(TRAPS) { 3421 if (_annotations == NULL && 3422 _type_annotations == NULL && 3423 _fields_annotations == NULL && 3424 _fields_type_annotations == NULL) { 3425 // Don't create the Annotations object unnecessarily. 3426 return; 3427 } 3428 3429 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3430 annotations->set_class_annotations(_annotations); 3431 annotations->set_class_type_annotations(_type_annotations); 3432 annotations->set_fields_annotations(_fields_annotations); 3433 annotations->set_fields_type_annotations(_fields_type_annotations); 3434 3435 // This is the Annotations object that will be 3436 // assigned to InstanceKlass being constructed. 3437 _combined_annotations = annotations; 3438 3439 // The annotations arrays below has been transfered the 3440 // _combined_annotations so these fields can now be cleared. 3441 _annotations = NULL; 3442 _type_annotations = NULL; 3443 _fields_annotations = NULL; 3444 _fields_type_annotations = NULL; 3445 } 3446 3447 // Transfer ownership of metadata allocated to the InstanceKlass. 3448 void ClassFileParser::apply_parsed_class_metadata( 3449 InstanceKlass* this_klass, 3450 int java_fields_count, TRAPS) { 3451 assert(this_klass != NULL, "invariant"); 3452 3453 _cp->set_pool_holder(this_klass); 3454 this_klass->set_constants(_cp); 3455 this_klass->set_fields(_fields, java_fields_count); 3456 this_klass->set_methods(_methods); 3457 this_klass->set_inner_classes(_inner_classes); 3458 this_klass->set_local_interfaces(_local_interfaces); 3459 this_klass->set_transitive_interfaces(_transitive_interfaces); 3460 this_klass->set_annotations(_combined_annotations); 3461 3462 // Clear out these fields so they don't get deallocated by the destructor 3463 clear_class_metadata(); 3464 } 3465 3466 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3467 int runtime_visible_annotations_length, 3468 const u1* const runtime_invisible_annotations, 3469 int runtime_invisible_annotations_length, 3470 TRAPS) { 3471 AnnotationArray* annotations = NULL; 3472 if (runtime_visible_annotations != NULL || 3473 runtime_invisible_annotations != NULL) { 3474 annotations = MetadataFactory::new_array<u1>(_loader_data, 3475 runtime_visible_annotations_length + 3476 runtime_invisible_annotations_length, 3477 CHECK_(annotations)); 3478 if (runtime_visible_annotations != NULL) { 3479 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3480 annotations->at_put(i, runtime_visible_annotations[i]); 3481 } 3482 } 3483 if (runtime_invisible_annotations != NULL) { 3484 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3485 int append = runtime_visible_annotations_length+i; 3486 annotations->at_put(append, runtime_invisible_annotations[i]); 3487 } 3488 } 3489 } 3490 return annotations; 3491 } 3492 3493 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3494 const int super_class_index, 3495 const bool need_verify, 3496 TRAPS) { 3497 assert(cp != NULL, "invariant"); 3498 const InstanceKlass* super_klass = NULL; 3499 3500 if (super_class_index == 0) { 3501 check_property(_class_name == vmSymbols::java_lang_Object(), 3502 "Invalid superclass index %u in class file %s", 3503 super_class_index, 3504 CHECK_NULL); 3505 } else { 3506 check_property(valid_klass_reference_at(super_class_index), 3507 "Invalid superclass index %u in class file %s", 3508 super_class_index, 3509 CHECK_NULL); 3510 // The class name should be legal because it is checked when parsing constant pool. 3511 // However, make sure it is not an array type. 3512 bool is_array = false; 3513 if (cp->tag_at(super_class_index).is_klass()) { 3514 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3515 if (need_verify) 3516 is_array = super_klass->is_array_klass(); 3517 } else if (need_verify) { 3518 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3519 } 3520 if (need_verify) { 3521 guarantee_property(!is_array, 3522 "Bad superclass name in class file %s", CHECK_NULL); 3523 } 3524 } 3525 return super_klass; 3526 } 3527 3528 static unsigned int compute_oop_map_count(const InstanceKlass* super, 3529 unsigned int nonstatic_oop_map_count, 3530 int first_nonstatic_oop_offset) { 3531 3532 unsigned int map_count = 3533 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3534 if (nonstatic_oop_map_count > 0) { 3535 // We have oops to add to map 3536 if (map_count == 0) { 3537 map_count = nonstatic_oop_map_count; 3538 } 3539 else { 3540 // Check whether we should add a new map block or whether the last one can 3541 // be extended 3542 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3543 const OopMapBlock* const last_map = first_map + map_count - 1; 3544 3545 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3546 if (next_offset == first_nonstatic_oop_offset) { 3547 // There is no gap bettwen superklass's last oop field and first 3548 // local oop field, merge maps. 3549 nonstatic_oop_map_count -= 1; 3550 } 3551 else { 3552 // Superklass didn't end with a oop field, add extra maps 3553 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3554 } 3555 map_count += nonstatic_oop_map_count; 3556 } 3557 } 3558 return map_count; 3559 } 3560 3561 #ifndef PRODUCT 3562 static void print_field_layout(const Symbol* name, 3563 Array<u2>* fields, 3564 constantPoolHandle cp, 3565 int instance_size, 3566 int instance_fields_start, 3567 int instance_fields_end, 3568 int static_fields_end) { 3569 3570 assert(name != NULL, "invariant"); 3571 3572 tty->print("%s: field layout\n", name->as_klass_external_name()); 3573 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3574 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3575 if (!fs.access_flags().is_static()) { 3576 tty->print(" @%3d \"%s\" %s\n", 3577 fs.offset(), 3578 fs.name()->as_klass_external_name(), 3579 fs.signature()->as_klass_external_name()); 3580 } 3581 } 3582 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3583 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3584 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3585 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3586 if (fs.access_flags().is_static()) { 3587 tty->print(" @%3d \"%s\" %s\n", 3588 fs.offset(), 3589 fs.name()->as_klass_external_name(), 3590 fs.signature()->as_klass_external_name()); 3591 } 3592 } 3593 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3594 tty->print("\n"); 3595 } 3596 #endif 3597 3598 // Values needed for oopmap and InstanceKlass creation 3599 class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3600 public: 3601 int* nonstatic_oop_offsets; 3602 unsigned int* nonstatic_oop_counts; 3603 unsigned int nonstatic_oop_map_count; 3604 unsigned int total_oop_map_count; 3605 int instance_size; 3606 int nonstatic_field_size; 3607 int static_field_size; 3608 bool has_nonstatic_fields; 3609 }; 3610 3611 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3612 void ClassFileParser::layout_fields(ConstantPool* cp, 3613 const FieldAllocationCount* fac, 3614 const ClassAnnotationCollector* parsed_annotations, 3615 FieldLayoutInfo* info, 3616 TRAPS) { 3617 3618 assert(cp != NULL, "invariant"); 3619 3620 // Field size and offset computation 3621 int nonstatic_field_size = _super_klass == NULL ? 0 : 3622 _super_klass->nonstatic_field_size(); 3623 3624 // Count the contended fields by type. 3625 // 3626 // We ignore static fields, because @Contended is not supported for them. 3627 // The layout code below will also ignore the static fields. 3628 int nonstatic_contended_count = 0; 3629 FieldAllocationCount fac_contended; 3630 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3631 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3632 if (fs.is_contended()) { 3633 fac_contended.count[atype]++; 3634 if (!fs.access_flags().is_static()) { 3635 nonstatic_contended_count++; 3636 } 3637 } 3638 } 3639 3640 3641 // Calculate the starting byte offsets 3642 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3643 int next_static_double_offset = next_static_oop_offset + 3644 ((fac->count[STATIC_OOP]) * heapOopSize); 3645 if ( fac->count[STATIC_DOUBLE] && 3646 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3647 Universe::field_type_should_be_aligned(T_LONG)) ) { 3648 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3649 } 3650 3651 int next_static_word_offset = next_static_double_offset + 3652 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3653 int next_static_short_offset = next_static_word_offset + 3654 ((fac->count[STATIC_WORD]) * BytesPerInt); 3655 int next_static_byte_offset = next_static_short_offset + 3656 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3657 3658 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3659 nonstatic_field_size * heapOopSize; 3660 3661 int next_nonstatic_field_offset = nonstatic_fields_start; 3662 3663 const bool is_contended_class = parsed_annotations->is_contended(); 3664 3665 // Class is contended, pad before all the fields 3666 if (is_contended_class) { 3667 next_nonstatic_field_offset += ContendedPaddingWidth; 3668 } 3669 3670 // Compute the non-contended fields count. 3671 // The packing code below relies on these counts to determine if some field 3672 // can be squeezed into the alignment gap. Contended fields are obviously 3673 // exempt from that. 3674 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3675 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3676 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3677 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3678 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3679 3680 // Total non-static fields count, including every contended field 3681 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3682 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3683 fac->count[NONSTATIC_OOP]; 3684 3685 const bool super_has_nonstatic_fields = 3686 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3687 const bool has_nonstatic_fields = 3688 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3689 3690 3691 // Prepare list of oops for oop map generation. 3692 // 3693 // "offset" and "count" lists are describing the set of contiguous oop 3694 // regions. offset[i] is the start of the i-th region, which then has 3695 // count[i] oops following. Before we know how many regions are required, 3696 // we pessimistically allocate the maps to fit all the oops into the 3697 // distinct regions. 3698 // 3699 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3700 // to figure out if we still need to do this. 3701 unsigned int nonstatic_oop_map_count = 0; 3702 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3703 3704 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3705 THREAD, int, max_nonstatic_oop_maps); 3706 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3707 THREAD, unsigned int, max_nonstatic_oop_maps); 3708 3709 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3710 3711 bool compact_fields = CompactFields; 3712 int allocation_style = FieldsAllocationStyle; 3713 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3714 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3715 allocation_style = 1; // Optimistic 3716 } 3717 3718 // The next classes have predefined hard-coded fields offsets 3719 // (see in JavaClasses::compute_hard_coded_offsets()). 3720 // Use default fields allocation order for them. 3721 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3722 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3723 _class_name == vmSymbols::java_lang_Class() || 3724 _class_name == vmSymbols::java_lang_ClassLoader() || 3725 _class_name == vmSymbols::java_lang_ref_Reference() || 3726 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3727 _class_name == vmSymbols::java_lang_StackTraceElement() || 3728 _class_name == vmSymbols::java_lang_String() || 3729 _class_name == vmSymbols::java_lang_Throwable() || 3730 _class_name == vmSymbols::java_lang_Boolean() || 3731 _class_name == vmSymbols::java_lang_Character() || 3732 _class_name == vmSymbols::java_lang_Float() || 3733 _class_name == vmSymbols::java_lang_Double() || 3734 _class_name == vmSymbols::java_lang_Byte() || 3735 _class_name == vmSymbols::java_lang_Short() || 3736 _class_name == vmSymbols::java_lang_Integer() || 3737 _class_name == vmSymbols::java_lang_Long())) { 3738 allocation_style = 0; // Allocate oops first 3739 compact_fields = false; // Don't compact fields 3740 } 3741 3742 int next_nonstatic_oop_offset = 0; 3743 int next_nonstatic_double_offset = 0; 3744 3745 // Rearrange fields for a given allocation style 3746 if( allocation_style == 0 ) { 3747 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3748 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3749 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3750 (nonstatic_oop_count * heapOopSize); 3751 } else if( allocation_style == 1 ) { 3752 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3753 next_nonstatic_double_offset = next_nonstatic_field_offset; 3754 } else if( allocation_style == 2 ) { 3755 // Fields allocation: oops fields in super and sub classes are together. 3756 if( nonstatic_field_size > 0 && _super_klass != NULL && 3757 _super_klass->nonstatic_oop_map_size() > 0 ) { 3758 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3759 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3760 const OopMapBlock* const last_map = first_map + map_count - 1; 3761 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3762 if (next_offset == next_nonstatic_field_offset) { 3763 allocation_style = 0; // allocate oops first 3764 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3765 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3766 (nonstatic_oop_count * heapOopSize); 3767 } 3768 } 3769 if( allocation_style == 2 ) { 3770 allocation_style = 1; // allocate oops last 3771 next_nonstatic_double_offset = next_nonstatic_field_offset; 3772 } 3773 } else { 3774 ShouldNotReachHere(); 3775 } 3776 3777 int nonstatic_oop_space_count = 0; 3778 int nonstatic_word_space_count = 0; 3779 int nonstatic_short_space_count = 0; 3780 int nonstatic_byte_space_count = 0; 3781 int nonstatic_oop_space_offset = 0; 3782 int nonstatic_word_space_offset = 0; 3783 int nonstatic_short_space_offset = 0; 3784 int nonstatic_byte_space_offset = 0; 3785 3786 // Try to squeeze some of the fields into the gaps due to 3787 // long/double alignment. 3788 if (nonstatic_double_count > 0) { 3789 int offset = next_nonstatic_double_offset; 3790 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3791 if (compact_fields && offset != next_nonstatic_double_offset) { 3792 // Allocate available fields into the gap before double field. 3793 int length = next_nonstatic_double_offset - offset; 3794 assert(length == BytesPerInt, ""); 3795 nonstatic_word_space_offset = offset; 3796 if (nonstatic_word_count > 0) { 3797 nonstatic_word_count -= 1; 3798 nonstatic_word_space_count = 1; // Only one will fit 3799 length -= BytesPerInt; 3800 offset += BytesPerInt; 3801 } 3802 nonstatic_short_space_offset = offset; 3803 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3804 nonstatic_short_count -= 1; 3805 nonstatic_short_space_count += 1; 3806 length -= BytesPerShort; 3807 offset += BytesPerShort; 3808 } 3809 nonstatic_byte_space_offset = offset; 3810 while (length > 0 && nonstatic_byte_count > 0) { 3811 nonstatic_byte_count -= 1; 3812 nonstatic_byte_space_count += 1; 3813 length -= 1; 3814 } 3815 // Allocate oop field in the gap if there are no other fields for that. 3816 nonstatic_oop_space_offset = offset; 3817 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3818 allocation_style != 0) { // when oop fields not first 3819 nonstatic_oop_count -= 1; 3820 nonstatic_oop_space_count = 1; // Only one will fit 3821 length -= heapOopSize; 3822 offset += heapOopSize; 3823 } 3824 } 3825 } 3826 3827 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3828 (nonstatic_double_count * BytesPerLong); 3829 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3830 (nonstatic_word_count * BytesPerInt); 3831 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3832 (nonstatic_short_count * BytesPerShort); 3833 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3834 nonstatic_byte_count; 3835 3836 // let oops jump before padding with this allocation style 3837 if( allocation_style == 1 ) { 3838 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3839 if( nonstatic_oop_count > 0 ) { 3840 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3841 } 3842 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3843 } 3844 3845 // Iterate over fields again and compute correct offsets. 3846 // The field allocation type was temporarily stored in the offset slot. 3847 // oop fields are located before non-oop fields (static and non-static). 3848 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3849 3850 // skip already laid out fields 3851 if (fs.is_offset_set()) continue; 3852 3853 // contended instance fields are handled below 3854 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3855 3856 int real_offset = 0; 3857 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3858 3859 // pack the rest of the fields 3860 switch (atype) { 3861 case STATIC_OOP: 3862 real_offset = next_static_oop_offset; 3863 next_static_oop_offset += heapOopSize; 3864 break; 3865 case STATIC_BYTE: 3866 real_offset = next_static_byte_offset; 3867 next_static_byte_offset += 1; 3868 break; 3869 case STATIC_SHORT: 3870 real_offset = next_static_short_offset; 3871 next_static_short_offset += BytesPerShort; 3872 break; 3873 case STATIC_WORD: 3874 real_offset = next_static_word_offset; 3875 next_static_word_offset += BytesPerInt; 3876 break; 3877 case STATIC_DOUBLE: 3878 real_offset = next_static_double_offset; 3879 next_static_double_offset += BytesPerLong; 3880 break; 3881 case NONSTATIC_OOP: 3882 if( nonstatic_oop_space_count > 0 ) { 3883 real_offset = nonstatic_oop_space_offset; 3884 nonstatic_oop_space_offset += heapOopSize; 3885 nonstatic_oop_space_count -= 1; 3886 } else { 3887 real_offset = next_nonstatic_oop_offset; 3888 next_nonstatic_oop_offset += heapOopSize; 3889 } 3890 3891 // Record this oop in the oop maps 3892 if( nonstatic_oop_map_count > 0 && 3893 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3894 real_offset - 3895 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3896 heapOopSize ) { 3897 // This oop is adjacent to the previous one, add to current oop map 3898 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3899 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3900 } else { 3901 // This oop is not adjacent to the previous one, create new oop map 3902 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3903 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3904 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3905 nonstatic_oop_map_count += 1; 3906 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3907 first_nonstatic_oop_offset = real_offset; 3908 } 3909 } 3910 break; 3911 case NONSTATIC_BYTE: 3912 if( nonstatic_byte_space_count > 0 ) { 3913 real_offset = nonstatic_byte_space_offset; 3914 nonstatic_byte_space_offset += 1; 3915 nonstatic_byte_space_count -= 1; 3916 } else { 3917 real_offset = next_nonstatic_byte_offset; 3918 next_nonstatic_byte_offset += 1; 3919 } 3920 break; 3921 case NONSTATIC_SHORT: 3922 if( nonstatic_short_space_count > 0 ) { 3923 real_offset = nonstatic_short_space_offset; 3924 nonstatic_short_space_offset += BytesPerShort; 3925 nonstatic_short_space_count -= 1; 3926 } else { 3927 real_offset = next_nonstatic_short_offset; 3928 next_nonstatic_short_offset += BytesPerShort; 3929 } 3930 break; 3931 case NONSTATIC_WORD: 3932 if( nonstatic_word_space_count > 0 ) { 3933 real_offset = nonstatic_word_space_offset; 3934 nonstatic_word_space_offset += BytesPerInt; 3935 nonstatic_word_space_count -= 1; 3936 } else { 3937 real_offset = next_nonstatic_word_offset; 3938 next_nonstatic_word_offset += BytesPerInt; 3939 } 3940 break; 3941 case NONSTATIC_DOUBLE: 3942 real_offset = next_nonstatic_double_offset; 3943 next_nonstatic_double_offset += BytesPerLong; 3944 break; 3945 default: 3946 ShouldNotReachHere(); 3947 } 3948 fs.set_offset(real_offset); 3949 } 3950 3951 3952 // Handle the contended cases. 3953 // 3954 // Each contended field should not intersect the cache line with another contended field. 3955 // In the absence of alignment information, we end up with pessimistically separating 3956 // the fields with full-width padding. 3957 // 3958 // Additionally, this should not break alignment for the fields, so we round the alignment up 3959 // for each field. 3960 if (nonstatic_contended_count > 0) { 3961 3962 // if there is at least one contended field, we need to have pre-padding for them 3963 next_nonstatic_padded_offset += ContendedPaddingWidth; 3964 3965 // collect all contended groups 3966 ResourceBitMap bm(cp->size()); 3967 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3968 // skip already laid out fields 3969 if (fs.is_offset_set()) continue; 3970 3971 if (fs.is_contended()) { 3972 bm.set_bit(fs.contended_group()); 3973 } 3974 } 3975 3976 int current_group = -1; 3977 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 3978 3979 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3980 3981 // skip already laid out fields 3982 if (fs.is_offset_set()) continue; 3983 3984 // skip non-contended fields and fields from different group 3985 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 3986 3987 // handle statics below 3988 if (fs.access_flags().is_static()) continue; 3989 3990 int real_offset = 0; 3991 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3992 3993 switch (atype) { 3994 case NONSTATIC_BYTE: 3995 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 3996 real_offset = next_nonstatic_padded_offset; 3997 next_nonstatic_padded_offset += 1; 3998 break; 3999 4000 case NONSTATIC_SHORT: 4001 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4002 real_offset = next_nonstatic_padded_offset; 4003 next_nonstatic_padded_offset += BytesPerShort; 4004 break; 4005 4006 case NONSTATIC_WORD: 4007 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4008 real_offset = next_nonstatic_padded_offset; 4009 next_nonstatic_padded_offset += BytesPerInt; 4010 break; 4011 4012 case NONSTATIC_DOUBLE: 4013 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4014 real_offset = next_nonstatic_padded_offset; 4015 next_nonstatic_padded_offset += BytesPerLong; 4016 break; 4017 4018 case NONSTATIC_OOP: 4019 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4020 real_offset = next_nonstatic_padded_offset; 4021 next_nonstatic_padded_offset += heapOopSize; 4022 4023 // Record this oop in the oop maps 4024 if( nonstatic_oop_map_count > 0 && 4025 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4026 real_offset - 4027 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4028 heapOopSize ) { 4029 // This oop is adjacent to the previous one, add to current oop map 4030 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4031 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4032 } else { 4033 // This oop is not adjacent to the previous one, create new oop map 4034 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4035 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4036 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4037 nonstatic_oop_map_count += 1; 4038 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4039 first_nonstatic_oop_offset = real_offset; 4040 } 4041 } 4042 break; 4043 4044 default: 4045 ShouldNotReachHere(); 4046 } 4047 4048 if (fs.contended_group() == 0) { 4049 // Contended group defines the equivalence class over the fields: 4050 // the fields within the same contended group are not inter-padded. 4051 // The only exception is default group, which does not incur the 4052 // equivalence, and so requires intra-padding. 4053 next_nonstatic_padded_offset += ContendedPaddingWidth; 4054 } 4055 4056 fs.set_offset(real_offset); 4057 } // for 4058 4059 // Start laying out the next group. 4060 // Note that this will effectively pad the last group in the back; 4061 // this is expected to alleviate memory contention effects for 4062 // subclass fields and/or adjacent object. 4063 // If this was the default group, the padding is already in place. 4064 if (current_group != 0) { 4065 next_nonstatic_padded_offset += ContendedPaddingWidth; 4066 } 4067 } 4068 4069 // handle static fields 4070 } 4071 4072 // Entire class is contended, pad in the back. 4073 // This helps to alleviate memory contention effects for subclass fields 4074 // and/or adjacent object. 4075 if (is_contended_class) { 4076 next_nonstatic_padded_offset += ContendedPaddingWidth; 4077 } 4078 4079 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4080 4081 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); 4082 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4083 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4084 4085 int static_field_size = (static_fields_end - 4086 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4087 nonstatic_field_size = nonstatic_field_size + 4088 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4089 4090 int instance_size = align_object_size(instance_end / wordSize); 4091 4092 assert(instance_size == align_object_size(align_size_up( 4093 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4094 wordSize) / wordSize), "consistent layout helper value"); 4095 4096 // Invariant: nonstatic_field end/start should only change if there are 4097 // nonstatic fields in the class, or if the class is contended. We compare 4098 // against the non-aligned value, so that end alignment will not fail the 4099 // assert without actually having the fields. 4100 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4101 is_contended_class || 4102 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4103 4104 // Number of non-static oop map blocks allocated at end of klass. 4105 const unsigned int total_oop_map_count = 4106 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4107 first_nonstatic_oop_offset); 4108 4109 #ifndef PRODUCT 4110 if (PrintFieldLayout) { 4111 print_field_layout(_class_name, 4112 _fields, 4113 cp, 4114 instance_size, 4115 nonstatic_fields_start, 4116 nonstatic_fields_end, 4117 static_fields_end); 4118 } 4119 4120 #endif 4121 // Pass back information needed for InstanceKlass creation 4122 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4123 info->nonstatic_oop_counts = nonstatic_oop_counts; 4124 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4125 info->total_oop_map_count = total_oop_map_count; 4126 info->instance_size = instance_size; 4127 info->static_field_size = static_field_size; 4128 info->nonstatic_field_size = nonstatic_field_size; 4129 info->has_nonstatic_fields = has_nonstatic_fields; 4130 } 4131 4132 static void fill_oop_maps(const InstanceKlass* k, 4133 unsigned int nonstatic_oop_map_count, 4134 const int* nonstatic_oop_offsets, 4135 const unsigned int* nonstatic_oop_counts) { 4136 4137 assert(k != NULL, "invariant"); 4138 4139 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4140 const InstanceKlass* const super = k->superklass(); 4141 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4142 if (super_count > 0) { 4143 // Copy maps from superklass 4144 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4145 for (unsigned int i = 0; i < super_count; ++i) { 4146 *this_oop_map++ = *super_oop_map++; 4147 } 4148 } 4149 4150 if (nonstatic_oop_map_count > 0) { 4151 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4152 // The counts differ because there is no gap between superklass's last oop 4153 // field and the first local oop field. Extend the last oop map copied 4154 // from the superklass instead of creating new one. 4155 nonstatic_oop_map_count--; 4156 nonstatic_oop_offsets++; 4157 this_oop_map--; 4158 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4159 this_oop_map++; 4160 } 4161 4162 // Add new map blocks, fill them 4163 while (nonstatic_oop_map_count-- > 0) { 4164 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4165 this_oop_map->set_count(*nonstatic_oop_counts++); 4166 this_oop_map++; 4167 } 4168 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4169 this_oop_map, "sanity"); 4170 } 4171 } 4172 4173 4174 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4175 assert(ik != NULL, "invariant"); 4176 4177 const Klass* const super = ik->super(); 4178 4179 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4180 // in which case we don't have to register objects as finalizable 4181 if (!_has_empty_finalizer) { 4182 if (_has_finalizer || 4183 (super != NULL && super->has_finalizer())) { 4184 ik->set_has_finalizer(); 4185 } 4186 } 4187 4188 #ifdef ASSERT 4189 bool f = false; 4190 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4191 vmSymbols::void_method_signature()); 4192 if (m != NULL && !m->is_empty_method()) { 4193 f = true; 4194 } 4195 4196 // Spec doesn't prevent agent from redefinition of empty finalizer. 4197 // Despite the fact that it's generally bad idea and redefined finalizer 4198 // will not work as expected we shouldn't abort vm in this case 4199 if (!ik->has_redefined_this_or_super()) { 4200 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4201 } 4202 #endif 4203 4204 // Check if this klass supports the java.lang.Cloneable interface 4205 if (SystemDictionary::Cloneable_klass_loaded()) { 4206 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4207 ik->set_is_cloneable(); 4208 } 4209 } 4210 4211 // Check if this klass has a vanilla default constructor 4212 if (super == NULL) { 4213 // java.lang.Object has empty default constructor 4214 ik->set_has_vanilla_constructor(); 4215 } else { 4216 if (super->has_vanilla_constructor() && 4217 _has_vanilla_constructor) { 4218 ik->set_has_vanilla_constructor(); 4219 } 4220 #ifdef ASSERT 4221 bool v = false; 4222 if (super->has_vanilla_constructor()) { 4223 const Method* const constructor = 4224 ik->find_method(vmSymbols::object_initializer_name(), 4225 vmSymbols::void_method_signature()); 4226 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4227 v = true; 4228 } 4229 } 4230 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4231 #endif 4232 } 4233 4234 // If it cannot be fast-path allocated, set a bit in the layout helper. 4235 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4236 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4237 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4238 || ik->is_abstract() || ik->is_interface() 4239 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4240 || ik->size_helper() >= FastAllocateSizeLimit) { 4241 // Forbid fast-path allocation. 4242 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4243 ik->set_layout_helper(lh); 4244 } 4245 } 4246 4247 // Attach super classes and interface classes to class loader data 4248 static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4249 TRAPS) { 4250 assert(defined_klass != NULL, "invariant"); 4251 4252 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4253 if (defining_loader_data->is_the_null_class_loader_data()) { 4254 // Dependencies to null class loader data are implicit. 4255 return; 4256 } else { 4257 // add super class dependency 4258 Klass* const super = defined_klass->super(); 4259 if (super != NULL) { 4260 defining_loader_data->record_dependency(super, CHECK); 4261 } 4262 4263 // add super interface dependencies 4264 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4265 if (local_interfaces != NULL) { 4266 const int length = local_interfaces->length(); 4267 for (int i = 0; i < length; i++) { 4268 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4269 } 4270 } 4271 } 4272 } 4273 4274 // utility methods for appending an array with check for duplicates 4275 4276 static void append_interfaces(GrowableArray<Klass*>* result, 4277 const Array<Klass*>* const ifs) { 4278 // iterate over new interfaces 4279 for (int i = 0; i < ifs->length(); i++) { 4280 Klass* const e = ifs->at(i); 4281 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4282 // add new interface 4283 result->append_if_missing(e); 4284 } 4285 } 4286 4287 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4288 Array<Klass*>* local_ifs, 4289 ClassLoaderData* loader_data, 4290 TRAPS) { 4291 assert(local_ifs != NULL, "invariant"); 4292 assert(loader_data != NULL, "invariant"); 4293 4294 // Compute maximum size for transitive interfaces 4295 int max_transitive_size = 0; 4296 int super_size = 0; 4297 // Add superclass transitive interfaces size 4298 if (super != NULL) { 4299 super_size = super->transitive_interfaces()->length(); 4300 max_transitive_size += super_size; 4301 } 4302 // Add local interfaces' super interfaces 4303 const int local_size = local_ifs->length(); 4304 for (int i = 0; i < local_size; i++) { 4305 Klass* const l = local_ifs->at(i); 4306 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4307 } 4308 // Finally add local interfaces 4309 max_transitive_size += local_size; 4310 // Construct array 4311 if (max_transitive_size == 0) { 4312 // no interfaces, use canonicalized array 4313 return Universe::the_empty_klass_array(); 4314 } else if (max_transitive_size == super_size) { 4315 // no new local interfaces added, share superklass' transitive interface array 4316 return super->transitive_interfaces(); 4317 } else if (max_transitive_size == local_size) { 4318 // only local interfaces added, share local interface array 4319 return local_ifs; 4320 } else { 4321 ResourceMark rm; 4322 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4323 4324 // Copy down from superclass 4325 if (super != NULL) { 4326 append_interfaces(result, super->transitive_interfaces()); 4327 } 4328 4329 // Copy down from local interfaces' superinterfaces 4330 for (int i = 0; i < local_size; i++) { 4331 Klass* const l = local_ifs->at(i); 4332 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4333 } 4334 // Finally add local interfaces 4335 append_interfaces(result, local_ifs); 4336 4337 // length will be less than the max_transitive_size if duplicates were removed 4338 const int length = result->length(); 4339 assert(length <= max_transitive_size, "just checking"); 4340 Array<Klass*>* const new_result = 4341 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4342 for (int i = 0; i < length; i++) { 4343 Klass* const e = result->at(i); 4344 assert(e != NULL, "just checking"); 4345 new_result->at_put(i, e); 4346 } 4347 return new_result; 4348 } 4349 } 4350 4351 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4352 assert(this_klass != NULL, "invariant"); 4353 const Klass* const super = this_klass->super(); 4354 if (super != NULL) { 4355 Reflection::VerifyClassAccessResults vca_result = 4356 Reflection::verify_class_access(this_klass, super, false); 4357 if (vca_result != Reflection::ACCESS_OK) { 4358 ResourceMark rm(THREAD); 4359 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result); 4360 if (msg == NULL) { 4361 ResourceMark rm(THREAD); 4362 Exceptions::fthrow( 4363 THREAD_AND_LOCATION, 4364 vmSymbols::java_lang_IllegalAccessError(), 4365 "class %s cannot access its superclass %s", 4366 this_klass->external_name(), 4367 super->external_name()); 4368 } else { 4369 // Add additional message content. 4370 Exceptions::fthrow( 4371 THREAD_AND_LOCATION, 4372 vmSymbols::java_lang_IllegalAccessError(), 4373 "superclass access check failed: %s", 4374 msg); 4375 } 4376 } 4377 } 4378 } 4379 4380 4381 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4382 assert(this_klass != NULL, "invariant"); 4383 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4384 const int lng = local_interfaces->length(); 4385 for (int i = lng - 1; i >= 0; i--) { 4386 Klass* const k = local_interfaces->at(i); 4387 assert (k != NULL && k->is_interface(), "invalid interface"); 4388 Reflection::VerifyClassAccessResults vca_result = 4389 Reflection::verify_class_access(this_klass, k, false); 4390 if (vca_result != Reflection::ACCESS_OK) { 4391 ResourceMark rm(THREAD); 4392 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result); 4393 if (msg == NULL) { 4394 Exceptions::fthrow( 4395 THREAD_AND_LOCATION, 4396 vmSymbols::java_lang_IllegalAccessError(), 4397 "class %s cannot access its superinterface %s", 4398 this_klass->external_name(), 4399 k->external_name()); 4400 } else { 4401 // Add additional message content. 4402 Exceptions::fthrow( 4403 THREAD_AND_LOCATION, 4404 vmSymbols::java_lang_IllegalAccessError(), 4405 "superinterface check failed: %s", 4406 msg); 4407 } 4408 } 4409 } 4410 } 4411 4412 4413 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4414 assert(this_klass != NULL, "invariant"); 4415 const Array<Method*>* const methods = this_klass->methods(); 4416 const int num_methods = methods->length(); 4417 4418 // go thru each method and check if it overrides a final method 4419 for (int index = 0; index < num_methods; index++) { 4420 const Method* const m = methods->at(index); 4421 4422 // skip private, static, and <init> methods 4423 if ((!m->is_private() && !m->is_static()) && 4424 (m->name() != vmSymbols::object_initializer_name())) { 4425 4426 const Symbol* const name = m->name(); 4427 const Symbol* const signature = m->signature(); 4428 const Klass* k = this_klass->super(); 4429 const Method* super_m = NULL; 4430 while (k != NULL) { 4431 // skip supers that don't have final methods. 4432 if (k->has_final_method()) { 4433 // lookup a matching method in the super class hierarchy 4434 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4435 if (super_m == NULL) { 4436 break; // didn't find any match; get out 4437 } 4438 4439 if (super_m->is_final() && !super_m->is_static() && 4440 // matching method in super is final, and not static 4441 (Reflection::verify_field_access(this_klass, 4442 super_m->method_holder(), 4443 super_m->method_holder(), 4444 super_m->access_flags(), false)) 4445 // this class can access super final method and therefore override 4446 ) { 4447 ResourceMark rm(THREAD); 4448 Exceptions::fthrow( 4449 THREAD_AND_LOCATION, 4450 vmSymbols::java_lang_VerifyError(), 4451 "class %s overrides final method %s.%s%s", 4452 this_klass->external_name(), 4453 super_m->method_holder()->external_name(), 4454 name->as_C_string(), 4455 signature->as_C_string() 4456 ); 4457 return; 4458 } 4459 4460 // continue to look from super_m's holder's super. 4461 k = super_m->method_holder()->super(); 4462 continue; 4463 } 4464 4465 k = k->super(); 4466 } 4467 } 4468 } 4469 } 4470 4471 4472 // assumes that this_klass is an interface 4473 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4474 assert(this_klass != NULL, "invariant"); 4475 assert(this_klass->is_interface(), "not an interface"); 4476 const Array<Method*>* methods = this_klass->methods(); 4477 const int num_methods = methods->length(); 4478 4479 for (int index = 0; index < num_methods; index++) { 4480 const Method* const m = methods->at(index); 4481 // if m is static and not the init method, throw a verify error 4482 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4483 ResourceMark rm(THREAD); 4484 Exceptions::fthrow( 4485 THREAD_AND_LOCATION, 4486 vmSymbols::java_lang_VerifyError(), 4487 "Illegal static method %s in interface %s", 4488 m->name()->as_C_string(), 4489 this_klass->external_name() 4490 ); 4491 return; 4492 } 4493 } 4494 } 4495 4496 // utility methods for format checking 4497 4498 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4499 if (!_need_verify) { return; } 4500 4501 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4502 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4503 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4504 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4505 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4506 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4507 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0; 4508 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4509 4510 if ((is_abstract && is_final) || 4511 (is_interface && !is_abstract) || 4512 (is_interface && major_gte_15 && (is_super || is_enum)) || 4513 (!is_interface && major_gte_15 && is_annotation) || 4514 is_module_info) { 4515 ResourceMark rm(THREAD); 4516 Exceptions::fthrow( 4517 THREAD_AND_LOCATION, 4518 vmSymbols::java_lang_ClassFormatError(), 4519 "Illegal class modifiers in class %s: 0x%X", 4520 _class_name->as_C_string(), flags 4521 ); 4522 return; 4523 } 4524 } 4525 4526 static bool has_illegal_visibility(jint flags) { 4527 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4528 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4529 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4530 4531 return ((is_public && is_protected) || 4532 (is_public && is_private) || 4533 (is_protected && is_private)); 4534 } 4535 4536 static bool is_supported_version(u2 major, u2 minor){ 4537 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4538 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4539 (major <= max_version) && 4540 ((major != max_version) || 4541 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4542 } 4543 4544 void ClassFileParser::verify_legal_field_modifiers(jint flags, 4545 bool is_interface, 4546 TRAPS) const { 4547 if (!_need_verify) { return; } 4548 4549 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4550 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4551 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4552 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4553 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4554 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4555 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4556 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4557 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4558 4559 bool is_illegal = false; 4560 4561 if (is_interface) { 4562 if (!is_public || !is_static || !is_final || is_private || 4563 is_protected || is_volatile || is_transient || 4564 (major_gte_15 && is_enum)) { 4565 is_illegal = true; 4566 } 4567 } else { // not interface 4568 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4569 is_illegal = true; 4570 } 4571 } 4572 4573 if (is_illegal) { 4574 ResourceMark rm(THREAD); 4575 Exceptions::fthrow( 4576 THREAD_AND_LOCATION, 4577 vmSymbols::java_lang_ClassFormatError(), 4578 "Illegal field modifiers in class %s: 0x%X", 4579 _class_name->as_C_string(), flags); 4580 return; 4581 } 4582 } 4583 4584 void ClassFileParser::verify_legal_method_modifiers(jint flags, 4585 bool is_interface, 4586 const Symbol* name, 4587 TRAPS) const { 4588 if (!_need_verify) { return; } 4589 4590 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4591 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4592 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4593 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4594 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4595 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4596 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4597 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4598 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4599 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4600 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4601 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4602 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4603 4604 bool is_illegal = false; 4605 4606 if (is_interface) { 4607 if (major_gte_8) { 4608 // Class file version is JAVA_8_VERSION or later Methods of 4609 // interfaces may set any of the flags except ACC_PROTECTED, 4610 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4611 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4612 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4613 (is_native || is_protected || is_final || is_synchronized) || 4614 // If a specific method of a class or interface has its 4615 // ACC_ABSTRACT flag set, it must not have any of its 4616 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4617 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4618 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4619 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4620 (is_abstract && (is_private || is_static || is_strict))) { 4621 is_illegal = true; 4622 } 4623 } else if (major_gte_15) { 4624 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4625 if (!is_public || is_private || is_protected || is_static || is_final || 4626 is_synchronized || is_native || !is_abstract || is_strict) { 4627 is_illegal = true; 4628 } 4629 } else { 4630 // Class file version is pre-JAVA_1_5_VERSION 4631 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4632 is_illegal = true; 4633 } 4634 } 4635 } else { // not interface 4636 if (has_illegal_visibility(flags)) { 4637 is_illegal = true; 4638 } else { 4639 if (is_initializer) { 4640 if (is_static || is_final || is_synchronized || is_native || 4641 is_abstract || (major_gte_15 && is_bridge)) { 4642 is_illegal = true; 4643 } 4644 } else { // not initializer 4645 if (is_abstract) { 4646 if ((is_final || is_native || is_private || is_static || 4647 (major_gte_15 && (is_synchronized || is_strict)))) { 4648 is_illegal = true; 4649 } 4650 } 4651 } 4652 } 4653 } 4654 4655 if (is_illegal) { 4656 ResourceMark rm(THREAD); 4657 Exceptions::fthrow( 4658 THREAD_AND_LOCATION, 4659 vmSymbols::java_lang_ClassFormatError(), 4660 "Method %s in class %s has illegal modifiers: 0x%X", 4661 name->as_C_string(), _class_name->as_C_string(), flags); 4662 return; 4663 } 4664 } 4665 4666 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4667 int length, 4668 TRAPS) const { 4669 assert(_need_verify, "only called when _need_verify is true"); 4670 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) { 4671 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4672 } 4673 } 4674 4675 // Unqualified names may not contain the characters '.', ';', '[', or '/'. 4676 // In class names, '/' separates unqualified names. This is verified in this function also. 4677 // Method names also may not contain the characters '<' or '>', unless <init> 4678 // or <clinit>. Note that method names may not be <init> or <clinit> in this 4679 // method. Because these names have been checked as special cases before 4680 // calling this method in verify_legal_method_name. 4681 // 4682 // This method is also called from the modular system APIs in modules.cpp 4683 // to verify the validity of module and package names. 4684 bool ClassFileParser::verify_unqualified_name(const char* name, 4685 unsigned int length, 4686 int type) { 4687 for (const char* p = name; p != name + length;) { 4688 jchar ch = *p; 4689 if (ch < 128) { 4690 if (ch == '.') { 4691 // permit '.' in module names unless it's the first char, or 4692 // preceding char is also a '.', or last char is a '.'. 4693 if ((type != ClassFileParser::LegalModule) || 4694 (p == name) || (*(p-1) == '.') || 4695 (p == name + length - 1)) { 4696 return false; 4697 } 4698 } 4699 if (ch == ';' || ch == '[' ) { 4700 return false; // do not permit '.', ';', or '[' 4701 } 4702 if (ch == '/') { 4703 // check for '//' or leading or trailing '/' which are not legal 4704 // unqualified name must not be empty 4705 if (type == ClassFileParser::LegalClass) { 4706 if (p == name || p+1 >= name+length || *(p+1) == '/') { 4707 return false; 4708 } 4709 } else { 4710 return false; // do not permit '/' unless it's class name 4711 } 4712 } 4713 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) { 4714 return false; // do not permit '<' or '>' in method names 4715 } 4716 p++; 4717 } else { 4718 char* tmp_p = UTF8::next(p, &ch); 4719 p = tmp_p; 4720 } 4721 } 4722 return true; 4723 } 4724 4725 // Take pointer to a string. Skip over the longest part of the string that could 4726 // be taken as a fieldname. Allow '/' if slash_ok is true. 4727 // Return a pointer to just past the fieldname. 4728 // Return NULL if no fieldname at all was found, or in the case of slash_ok 4729 // being true, we saw consecutive slashes (meaning we were looking for a 4730 // qualified path but found something that was badly-formed). 4731 static const char* skip_over_field_name(const char* name, 4732 bool slash_ok, 4733 unsigned int length) { 4734 const char* p; 4735 jboolean last_is_slash = false; 4736 jboolean not_first_ch = false; 4737 4738 for (p = name; p != name + length; not_first_ch = true) { 4739 const char* old_p = p; 4740 jchar ch = *p; 4741 if (ch < 128) { 4742 p++; 4743 // quick check for ascii 4744 if ((ch >= 'a' && ch <= 'z') || 4745 (ch >= 'A' && ch <= 'Z') || 4746 (ch == '_' || ch == '$') || 4747 (not_first_ch && ch >= '0' && ch <= '9')) { 4748 last_is_slash = false; 4749 continue; 4750 } 4751 if (slash_ok && ch == '/') { 4752 if (last_is_slash) { 4753 return NULL; // Don't permit consecutive slashes 4754 } 4755 last_is_slash = true; 4756 continue; 4757 } 4758 } 4759 else { 4760 jint unicode_ch; 4761 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4762 p = tmp_p; 4763 last_is_slash = false; 4764 // Check if ch is Java identifier start or is Java identifier part 4765 // 4672820: call java.lang.Character methods directly without generating separate tables. 4766 EXCEPTION_MARK; 4767 4768 // return value 4769 JavaValue result(T_BOOLEAN); 4770 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4771 JavaCallArguments args; 4772 args.push_int(unicode_ch); 4773 4774 // public static boolean isJavaIdentifierStart(char ch); 4775 JavaCalls::call_static(&result, 4776 SystemDictionary::Character_klass(), 4777 vmSymbols::isJavaIdentifierStart_name(), 4778 vmSymbols::int_bool_signature(), 4779 &args, 4780 THREAD); 4781 4782 if (HAS_PENDING_EXCEPTION) { 4783 CLEAR_PENDING_EXCEPTION; 4784 return 0; 4785 } 4786 if (result.get_jboolean()) { 4787 continue; 4788 } 4789 4790 if (not_first_ch) { 4791 // public static boolean isJavaIdentifierPart(char ch); 4792 JavaCalls::call_static(&result, 4793 SystemDictionary::Character_klass(), 4794 vmSymbols::isJavaIdentifierPart_name(), 4795 vmSymbols::int_bool_signature(), 4796 &args, 4797 THREAD); 4798 4799 if (HAS_PENDING_EXCEPTION) { 4800 CLEAR_PENDING_EXCEPTION; 4801 return 0; 4802 } 4803 4804 if (result.get_jboolean()) { 4805 continue; 4806 } 4807 } 4808 } 4809 return (not_first_ch) ? old_p : NULL; 4810 } 4811 return (not_first_ch) ? p : NULL; 4812 } 4813 4814 // Take pointer to a string. Skip over the longest part of the string that could 4815 // be taken as a field signature. Allow "void" if void_ok. 4816 // Return a pointer to just past the signature. 4817 // Return NULL if no legal signature is found. 4818 const char* ClassFileParser::skip_over_field_signature(const char* signature, 4819 bool void_ok, 4820 unsigned int length, 4821 TRAPS) const { 4822 unsigned int array_dim = 0; 4823 while (length > 0) { 4824 switch (signature[0]) { 4825 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4826 case JVM_SIGNATURE_BOOLEAN: 4827 case JVM_SIGNATURE_BYTE: 4828 case JVM_SIGNATURE_CHAR: 4829 case JVM_SIGNATURE_SHORT: 4830 case JVM_SIGNATURE_INT: 4831 case JVM_SIGNATURE_FLOAT: 4832 case JVM_SIGNATURE_LONG: 4833 case JVM_SIGNATURE_DOUBLE: 4834 return signature + 1; 4835 case JVM_SIGNATURE_CLASS: { 4836 if (_major_version < JAVA_1_5_VERSION) { 4837 // Skip over the class name if one is there 4838 const char* const p = skip_over_field_name(signature + 1, true, --length); 4839 4840 // The next character better be a semicolon 4841 if (p && (p - signature) > 1 && p[0] == ';') { 4842 return p + 1; 4843 } 4844 } 4845 else { 4846 // 4900761: For class version > 48, any unicode is allowed in class name. 4847 length--; 4848 signature++; 4849 while (length > 0 && signature[0] != ';') { 4850 if (signature[0] == '.') { 4851 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); 4852 } 4853 length--; 4854 signature++; 4855 } 4856 if (signature[0] == ';') { return signature + 1; } 4857 } 4858 4859 return NULL; 4860 } 4861 case JVM_SIGNATURE_ARRAY: 4862 array_dim++; 4863 if (array_dim > 255) { 4864 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4865 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4866 } 4867 // The rest of what's there better be a legal signature 4868 signature++; 4869 length--; 4870 void_ok = false; 4871 break; 4872 4873 default: 4874 return NULL; 4875 } 4876 } 4877 return NULL; 4878 } 4879 4880 // Checks if name is a legal class name. 4881 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4882 if (!_need_verify || _relax_verify) { return; } 4883 4884 char buf[fixed_buffer_size]; 4885 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4886 unsigned int length = name->utf8_length(); 4887 bool legal = false; 4888 4889 if (length > 0) { 4890 const char* p; 4891 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4892 p = skip_over_field_signature(bytes, false, length, CHECK); 4893 legal = (p != NULL) && ((p - bytes) == (int)length); 4894 } else if (_major_version < JAVA_1_5_VERSION) { 4895 if (bytes[0] != '<') { 4896 p = skip_over_field_name(bytes, true, length); 4897 legal = (p != NULL) && ((p - bytes) == (int)length); 4898 } 4899 } else { 4900 // 4900761: relax the constraints based on JSR202 spec 4901 // Class names may be drawn from the entire Unicode character set. 4902 // Identifiers between '/' must be unqualified names. 4903 // The utf8 string has been verified when parsing cpool entries. 4904 legal = verify_unqualified_name(bytes, length, LegalClass); 4905 } 4906 } 4907 if (!legal) { 4908 ResourceMark rm(THREAD); 4909 assert(_class_name != NULL, "invariant"); 4910 Exceptions::fthrow( 4911 THREAD_AND_LOCATION, 4912 vmSymbols::java_lang_ClassFormatError(), 4913 "Illegal class name \"%s\" in class file %s", bytes, 4914 _class_name->as_C_string() 4915 ); 4916 return; 4917 } 4918 } 4919 4920 // Checks if name is a legal field name. 4921 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 4922 if (!_need_verify || _relax_verify) { return; } 4923 4924 char buf[fixed_buffer_size]; 4925 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4926 unsigned int length = name->utf8_length(); 4927 bool legal = false; 4928 4929 if (length > 0) { 4930 if (_major_version < JAVA_1_5_VERSION) { 4931 if (bytes[0] != '<') { 4932 const char* p = skip_over_field_name(bytes, false, length); 4933 legal = (p != NULL) && ((p - bytes) == (int)length); 4934 } 4935 } else { 4936 // 4881221: relax the constraints based on JSR202 spec 4937 legal = verify_unqualified_name(bytes, length, LegalField); 4938 } 4939 } 4940 4941 if (!legal) { 4942 ResourceMark rm(THREAD); 4943 assert(_class_name != NULL, "invariant"); 4944 Exceptions::fthrow( 4945 THREAD_AND_LOCATION, 4946 vmSymbols::java_lang_ClassFormatError(), 4947 "Illegal field name \"%s\" in class %s", bytes, 4948 _class_name->as_C_string() 4949 ); 4950 return; 4951 } 4952 } 4953 4954 // Checks if name is a legal method name. 4955 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 4956 if (!_need_verify || _relax_verify) { return; } 4957 4958 assert(name != NULL, "method name is null"); 4959 char buf[fixed_buffer_size]; 4960 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4961 unsigned int length = name->utf8_length(); 4962 bool legal = false; 4963 4964 if (length > 0) { 4965 if (bytes[0] == '<') { 4966 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 4967 legal = true; 4968 } 4969 } else if (_major_version < JAVA_1_5_VERSION) { 4970 const char* p; 4971 p = skip_over_field_name(bytes, false, length); 4972 legal = (p != NULL) && ((p - bytes) == (int)length); 4973 } else { 4974 // 4881221: relax the constraints based on JSR202 spec 4975 legal = verify_unqualified_name(bytes, length, LegalMethod); 4976 } 4977 } 4978 4979 if (!legal) { 4980 ResourceMark rm(THREAD); 4981 assert(_class_name != NULL, "invariant"); 4982 Exceptions::fthrow( 4983 THREAD_AND_LOCATION, 4984 vmSymbols::java_lang_ClassFormatError(), 4985 "Illegal method name \"%s\" in class %s", bytes, 4986 _class_name->as_C_string() 4987 ); 4988 return; 4989 } 4990 } 4991 4992 4993 // Checks if signature is a legal field signature. 4994 void ClassFileParser::verify_legal_field_signature(const Symbol* name, 4995 const Symbol* signature, 4996 TRAPS) const { 4997 if (!_need_verify) { return; } 4998 4999 char buf[fixed_buffer_size]; 5000 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5001 const unsigned int length = signature->utf8_length(); 5002 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5003 5004 if (p == NULL || (p - bytes) != (int)length) { 5005 throwIllegalSignature("Field", name, signature, CHECK); 5006 } 5007 } 5008 5009 // Checks if signature is a legal method signature. 5010 // Returns number of parameters 5011 int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5012 const Symbol* signature, 5013 TRAPS) const { 5014 if (!_need_verify) { 5015 // make sure caller's args_size will be less than 0 even for non-static 5016 // method so it will be recomputed in compute_size_of_parameters(). 5017 return -2; 5018 } 5019 5020 // Class initializers cannot have args for class format version >= 51. 5021 if (name == vmSymbols::class_initializer_name() && 5022 signature != vmSymbols::void_method_signature() && 5023 _major_version >= JAVA_7_VERSION) { 5024 throwIllegalSignature("Method", name, signature, CHECK_0); 5025 return 0; 5026 } 5027 5028 unsigned int args_size = 0; 5029 char buf[fixed_buffer_size]; 5030 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5031 unsigned int length = signature->utf8_length(); 5032 const char* nextp; 5033 5034 // The first character must be a '(' 5035 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5036 length--; 5037 // Skip over legal field signatures 5038 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5039 while ((length > 0) && (nextp != NULL)) { 5040 args_size++; 5041 if (p[0] == 'J' || p[0] == 'D') { 5042 args_size++; 5043 } 5044 length -= nextp - p; 5045 p = nextp; 5046 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5047 } 5048 // The first non-signature thing better be a ')' 5049 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5050 length--; 5051 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5052 // All internal methods must return void 5053 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5054 return args_size; 5055 } 5056 } else { 5057 // Now we better just have a return value 5058 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5059 if (nextp && ((int)length == (nextp - p))) { 5060 return args_size; 5061 } 5062 } 5063 } 5064 } 5065 // Report error 5066 throwIllegalSignature("Method", name, signature, CHECK_0); 5067 return 0; 5068 } 5069 5070 int ClassFileParser::static_field_size() const { 5071 assert(_field_info != NULL, "invariant"); 5072 return _field_info->static_field_size; 5073 } 5074 5075 int ClassFileParser::total_oop_map_count() const { 5076 assert(_field_info != NULL, "invariant"); 5077 return _field_info->total_oop_map_count; 5078 } 5079 5080 jint ClassFileParser::layout_size() const { 5081 assert(_field_info != NULL, "invariant"); 5082 return _field_info->instance_size; 5083 } 5084 5085 static void check_methods_for_intrinsics(const InstanceKlass* ik, 5086 const Array<Method*>* methods) { 5087 assert(ik != NULL, "invariant"); 5088 assert(methods != NULL, "invariant"); 5089 5090 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5091 // (We used to do this lazily, but now we query it in Rewriter, 5092 // which is eagerly done for every method, so we might as well do it now, 5093 // when everything is fresh in memory.) 5094 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5095 5096 if (klass_id != vmSymbols::NO_SID) { 5097 for (int j = 0; j < methods->length(); ++j) { 5098 Method* method = methods->at(j); 5099 method->init_intrinsic_id(); 5100 5101 if (CheckIntrinsics) { 5102 // Check if an intrinsic is defined for method 'method', 5103 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5104 if (method->intrinsic_id() != vmIntrinsics::_none && 5105 !method->intrinsic_candidate()) { 5106 tty->print("Compiler intrinsic is defined for method [%s], " 5107 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5108 method->name_and_sig_as_C_string(), 5109 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5110 ); 5111 tty->cr(); 5112 DEBUG_ONLY(vm_exit(1)); 5113 } 5114 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5115 // but there is no intrinsic available for it. 5116 if (method->intrinsic_candidate() && 5117 method->intrinsic_id() == vmIntrinsics::_none) { 5118 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5119 "but no compiler intrinsic is defined for the method.%s", 5120 method->name_and_sig_as_C_string(), 5121 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5122 ); 5123 tty->cr(); 5124 DEBUG_ONLY(vm_exit(1)); 5125 } 5126 } 5127 } // end for 5128 5129 #ifdef ASSERT 5130 if (CheckIntrinsics) { 5131 // Check for orphan methods in the current class. A method m 5132 // of a class C is orphan if an intrinsic is defined for method m, 5133 // but class C does not declare m. 5134 // The check is potentially expensive, therefore it is available 5135 // only in debug builds. 5136 5137 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5138 if (vmIntrinsics::_compiledLambdaForm == id) { 5139 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5140 // generated for the JVM from a LambdaForm and therefore no method 5141 // is defined for it. 5142 continue; 5143 } 5144 5145 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5146 // Check if the current class contains a method with the same 5147 // name, flags, signature. 5148 bool match = false; 5149 for (int j = 0; j < methods->length(); ++j) { 5150 const Method* method = methods->at(j); 5151 if (method->intrinsic_id() == id) { 5152 match = true; 5153 break; 5154 } 5155 } 5156 5157 if (!match) { 5158 char buf[1000]; 5159 tty->print("Compiler intrinsic is defined for method [%s], " 5160 "but the method is not available in class [%s].%s", 5161 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5162 buf, sizeof(buf)), 5163 ik->name()->as_C_string(), 5164 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5165 ); 5166 tty->cr(); 5167 DEBUG_ONLY(vm_exit(1)); 5168 } 5169 } 5170 } // end for 5171 } // CheckIntrinsics 5172 #endif // ASSERT 5173 } 5174 } 5175 5176 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) { 5177 if (_klass != NULL) { 5178 return _klass; 5179 } 5180 5181 InstanceKlass* const ik = 5182 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5183 5184 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL); 5185 5186 assert(_klass == ik, "invariant"); 5187 5188 return ik; 5189 } 5190 5191 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) { 5192 assert(ik != NULL, "invariant"); 5193 5194 set_klass_to_deallocate(ik); 5195 5196 assert(_field_info != NULL, "invariant"); 5197 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5198 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5199 "sanity"); 5200 5201 assert(ik->is_instance_klass(), "sanity"); 5202 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5203 5204 // Fill in information already parsed 5205 ik->set_should_verify_class(_need_verify); 5206 5207 // Not yet: supers are done below to support the new subtype-checking fields 5208 ik->set_class_loader_data(_loader_data); 5209 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5210 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5211 assert(_fac != NULL, "invariant"); 5212 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5213 5214 // this transfers ownership of a lot of arrays from 5215 // the parser onto the InstanceKlass* 5216 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5217 5218 // note that is not safe to use the fields in the parser from this point on 5219 assert(NULL == _cp, "invariant"); 5220 assert(NULL == _fields, "invariant"); 5221 assert(NULL == _methods, "invariant"); 5222 assert(NULL == _inner_classes, "invariant"); 5223 assert(NULL == _local_interfaces, "invariant"); 5224 assert(NULL == _transitive_interfaces, "invariant"); 5225 assert(NULL == _combined_annotations, "invariant"); 5226 5227 if (_has_final_method) { 5228 ik->set_has_final_method(); 5229 } 5230 5231 ik->copy_method_ordering(_method_ordering, CHECK); 5232 // The InstanceKlass::_methods_jmethod_ids cache 5233 // is managed on the assumption that the initial cache 5234 // size is equal to the number of methods in the class. If 5235 // that changes, then InstanceKlass::idnum_can_increment() 5236 // has to be changed accordingly. 5237 ik->set_initial_method_idnum(ik->methods()->length()); 5238 5239 ik->set_name(_class_name); 5240 5241 if (is_anonymous()) { 5242 // I am well known to myself 5243 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve 5244 } 5245 5246 ik->set_minor_version(_minor_version); 5247 ik->set_major_version(_major_version); 5248 ik->set_has_default_methods(_has_default_methods); 5249 ik->set_declares_default_methods(_declares_default_methods); 5250 5251 if (_host_klass != NULL) { 5252 assert (ik->is_anonymous(), "should be the same"); 5253 ik->set_host_klass(_host_klass); 5254 } 5255 5256 // Set PackageEntry for this_klass 5257 oop cl = ik->class_loader(); 5258 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl)); 5259 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh()); 5260 ik->set_package(cld, CHECK); 5261 5262 const Array<Method*>* const methods = ik->methods(); 5263 assert(methods != NULL, "invariant"); 5264 const int methods_len = methods->length(); 5265 5266 check_methods_for_intrinsics(ik, methods); 5267 5268 // Fill in field values obtained by parse_classfile_attributes 5269 if (_parsed_annotations->has_any_annotations()) { 5270 _parsed_annotations->apply_to(ik); 5271 } 5272 5273 apply_parsed_class_attributes(ik); 5274 5275 // Miranda methods 5276 if ((_num_miranda_methods > 0) || 5277 // if this class introduced new miranda methods or 5278 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5279 // super class exists and this class inherited miranda methods 5280 ) { 5281 ik->set_has_miranda_methods(); // then set a flag 5282 } 5283 5284 // Fill in information needed to compute superclasses. 5285 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5286 5287 // Initialize itable offset tables 5288 klassItable::setup_itable_offset_table(ik); 5289 5290 // Compute transitive closure of interfaces this class implements 5291 // Do final class setup 5292 fill_oop_maps(ik, 5293 _field_info->nonstatic_oop_map_count, 5294 _field_info->nonstatic_oop_offsets, 5295 _field_info->nonstatic_oop_counts); 5296 5297 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5298 set_precomputed_flags(ik); 5299 5300 // check if this class can access its super class 5301 check_super_class_access(ik, CHECK); 5302 5303 // check if this class can access its superinterfaces 5304 check_super_interface_access(ik, CHECK); 5305 5306 // check if this class overrides any final method 5307 check_final_method_override(ik, CHECK); 5308 5309 // check that if this class is an interface then it doesn't have static methods 5310 if (ik->is_interface()) { 5311 /* An interface in a JAVA 8 classfile can be static */ 5312 if (_major_version < JAVA_8_VERSION) { 5313 check_illegal_static_method(ik, CHECK); 5314 } 5315 } 5316 5317 // Obtain this_klass' module entry 5318 ModuleEntry* module_entry = ik->module(); 5319 assert(module_entry != NULL, "module_entry should always be set"); 5320 5321 // Obtain java.lang.reflect.Module 5322 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module())); 5323 5324 // Allocate mirror and initialize static fields 5325 // The create_mirror() call will also call compute_modifiers() 5326 java_lang_Class::create_mirror(ik, 5327 _loader_data->class_loader(), 5328 module_handle, 5329 _protection_domain, 5330 CHECK); 5331 5332 assert(_all_mirandas != NULL, "invariant"); 5333 5334 // Generate any default methods - default methods are interface methods 5335 // that have a default implementation. This is new with Lambda project. 5336 if (_has_default_methods ) { 5337 DefaultMethods::generate_default_methods(ik, 5338 _all_mirandas, 5339 CHECK); 5340 } 5341 5342 // Add read edges to the unnamed modules of the bootstrap and app class loaders. 5343 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() && 5344 !module_entry->has_default_read_edges()) { 5345 if (!module_entry->set_has_default_read_edges()) { 5346 // We won a potential race 5347 JvmtiExport::add_default_read_edges(module_handle, THREAD); 5348 } 5349 } 5350 5351 // Update the loader_data graph. 5352 record_defined_class_dependencies(ik, CHECK); 5353 5354 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5355 5356 if (!is_internal()) { 5357 if (log_is_enabled(Info, class, load)) { 5358 ResourceMark rm; 5359 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string(); 5360 5361 if (log_is_enabled(Info, class, load)) { 5362 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream); 5363 } 5364 // No 'else' here as logging levels are not mutually exclusive 5365 if (log_is_enabled(Debug, class, load)) { 5366 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream); 5367 } 5368 } 5369 5370 if (log_is_enabled(Debug, class, resolve)) { 5371 ResourceMark rm; 5372 // print out the superclass. 5373 const char * from = ik->external_name(); 5374 if (ik->java_super() != NULL) { 5375 log_debug(class, resolve)("%s %s (super)", 5376 from, 5377 ik->java_super()->external_name()); 5378 } 5379 // print out each of the interface classes referred to by this class. 5380 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5381 if (local_interfaces != NULL) { 5382 const int length = local_interfaces->length(); 5383 for (int i = 0; i < length; i++) { 5384 const Klass* const k = local_interfaces->at(i); 5385 const char * to = k->external_name(); 5386 log_debug(class, resolve)("%s %s (interface)", from, to); 5387 } 5388 } 5389 } 5390 } 5391 5392 TRACE_INIT_KLASS_ID(ik); 5393 5394 // If we reach here, all is well. 5395 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5396 // in order for it to not be destroyed in the ClassFileParser destructor. 5397 set_klass_to_deallocate(NULL); 5398 5399 // it's official 5400 set_klass(ik); 5401 5402 debug_only(ik->verify();) 5403 } 5404 5405 ClassFileParser::ClassFileParser(ClassFileStream* stream, 5406 Symbol* name, 5407 ClassLoaderData* loader_data, 5408 Handle protection_domain, 5409 const Klass* host_klass, 5410 GrowableArray<Handle>* cp_patches, 5411 Publicity pub_level, 5412 TRAPS) : 5413 _stream(stream), 5414 _requested_name(name), 5415 _loader_data(loader_data), 5416 _host_klass(host_klass), 5417 _cp_patches(cp_patches), 5418 _super_klass(), 5419 _cp(NULL), 5420 _fields(NULL), 5421 _methods(NULL), 5422 _inner_classes(NULL), 5423 _local_interfaces(NULL), 5424 _transitive_interfaces(NULL), 5425 _combined_annotations(NULL), 5426 _annotations(NULL), 5427 _type_annotations(NULL), 5428 _fields_annotations(NULL), 5429 _fields_type_annotations(NULL), 5430 _klass(NULL), 5431 _klass_to_deallocate(NULL), 5432 _parsed_annotations(NULL), 5433 _fac(NULL), 5434 _field_info(NULL), 5435 _method_ordering(NULL), 5436 _all_mirandas(NULL), 5437 _vtable_size(0), 5438 _itable_size(0), 5439 _num_miranda_methods(0), 5440 _rt(REF_NONE), 5441 _protection_domain(protection_domain), 5442 _access_flags(), 5443 _pub_level(pub_level), 5444 _synthetic_flag(false), 5445 _sde_length(false), 5446 _sde_buffer(NULL), 5447 _sourcefile_index(0), 5448 _generic_signature_index(0), 5449 _major_version(0), 5450 _minor_version(0), 5451 _this_class_index(0), 5452 _super_class_index(0), 5453 _itfs_len(0), 5454 _java_fields_count(0), 5455 _need_verify(false), 5456 _relax_verify(false), 5457 _has_default_methods(false), 5458 _declares_default_methods(false), 5459 _has_final_method(false), 5460 _has_finalizer(false), 5461 _has_empty_finalizer(false), 5462 _has_vanilla_constructor(false), 5463 _max_bootstrap_specifier_index(-1) { 5464 5465 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5466 5467 assert(THREAD->is_Java_thread(), "invariant"); 5468 assert(_loader_data != NULL, "invariant"); 5469 assert(stream != NULL, "invariant"); 5470 assert(_stream != NULL, "invariant"); 5471 assert(_stream->buffer() == _stream->current(), "invariant"); 5472 assert(_class_name != NULL, "invariant"); 5473 assert(0 == _access_flags.as_int(), "invariant"); 5474 5475 // Figure out whether we can skip format checking (matching classic VM behavior) 5476 if (DumpSharedSpaces) { 5477 // verify == true means it's a 'remote' class (i.e., non-boot class) 5478 // Verification decision is based on BytecodeVerificationRemote flag 5479 // for those classes. 5480 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5481 BytecodeVerificationLocal; 5482 } 5483 else { 5484 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5485 stream->need_verify()); 5486 } 5487 5488 // synch back verification state to stream 5489 stream->set_verify(_need_verify); 5490 5491 // Check if verification needs to be relaxed for this class file 5492 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5493 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader()); 5494 5495 parse_stream(stream, CHECK); 5496 5497 post_process_parsed_stream(stream, _cp, CHECK); 5498 } 5499 5500 void ClassFileParser::clear_class_metadata() { 5501 // metadata created before the instance klass is created. Must be 5502 // deallocated if classfile parsing returns an error. 5503 _cp = NULL; 5504 _fields = NULL; 5505 _methods = NULL; 5506 _inner_classes = NULL; 5507 _local_interfaces = NULL; 5508 _transitive_interfaces = NULL; 5509 _combined_annotations = NULL; 5510 _annotations = _type_annotations = NULL; 5511 _fields_annotations = _fields_type_annotations = NULL; 5512 } 5513 5514 // Destructor to clean up 5515 ClassFileParser::~ClassFileParser() { 5516 if (_cp != NULL) { 5517 MetadataFactory::free_metadata(_loader_data, _cp); 5518 } 5519 if (_fields != NULL) { 5520 MetadataFactory::free_array<u2>(_loader_data, _fields); 5521 } 5522 5523 if (_methods != NULL) { 5524 // Free methods 5525 InstanceKlass::deallocate_methods(_loader_data, _methods); 5526 } 5527 5528 // beware of the Universe::empty_blah_array!! 5529 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5530 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5531 } 5532 5533 // Free interfaces 5534 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5535 _local_interfaces, _transitive_interfaces); 5536 5537 if (_combined_annotations != NULL) { 5538 // After all annotations arrays have been created, they are installed into the 5539 // Annotations object that will be assigned to the InstanceKlass being created. 5540 5541 // Deallocate the Annotations object and the installed annotations arrays. 5542 _combined_annotations->deallocate_contents(_loader_data); 5543 5544 // If the _combined_annotations pointer is non-NULL, 5545 // then the other annotations fields should have been cleared. 5546 assert(_annotations == NULL, "Should have been cleared"); 5547 assert(_type_annotations == NULL, "Should have been cleared"); 5548 assert(_fields_annotations == NULL, "Should have been cleared"); 5549 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5550 } else { 5551 // If the annotations arrays were not installed into the Annotations object, 5552 // then they have to be deallocated explicitly. 5553 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5554 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5555 Annotations::free_contents(_loader_data, _fields_annotations); 5556 Annotations::free_contents(_loader_data, _fields_type_annotations); 5557 } 5558 5559 clear_class_metadata(); 5560 5561 // deallocate the klass if already created. Don't directly deallocate, but add 5562 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5563 // at a safepoint. 5564 if (_klass_to_deallocate != NULL) { 5565 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5566 } 5567 } 5568 5569 void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5570 TRAPS) { 5571 5572 assert(stream != NULL, "invariant"); 5573 assert(_class_name != NULL, "invariant"); 5574 5575 // BEGIN STREAM PARSING 5576 stream->guarantee_more(8, CHECK); // magic, major, minor 5577 // Magic value 5578 const u4 magic = stream->get_u4_fast(); 5579 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5580 "Incompatible magic value %u in class file %s", 5581 magic, CHECK); 5582 5583 // Version numbers 5584 _minor_version = stream->get_u2_fast(); 5585 _major_version = stream->get_u2_fast(); 5586 5587 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5588 ResourceMark rm; 5589 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5590 _major_version, _minor_version, _class_name->as_C_string()); 5591 Exceptions::fthrow( 5592 THREAD_AND_LOCATION, 5593 vmSymbols::java_lang_UnsupportedClassVersionError(), 5594 "Unsupported major.minor version for dump time %u.%u", 5595 _major_version, 5596 _minor_version); 5597 } 5598 5599 // Check version numbers - we check this even with verifier off 5600 if (!is_supported_version(_major_version, _minor_version)) { 5601 ResourceMark rm(THREAD); 5602 Exceptions::fthrow( 5603 THREAD_AND_LOCATION, 5604 vmSymbols::java_lang_UnsupportedClassVersionError(), 5605 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5606 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5607 _class_name->as_C_string(), 5608 _major_version, 5609 _minor_version, 5610 JAVA_MAX_SUPPORTED_VERSION, 5611 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5612 return; 5613 } 5614 5615 stream->guarantee_more(3, CHECK); // length, first cp tag 5616 const u2 cp_size = stream->get_u2_fast(); 5617 5618 guarantee_property( 5619 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5620 cp_size, CHECK); 5621 5622 _cp = ConstantPool::allocate(_loader_data, 5623 cp_size, 5624 CHECK); 5625 5626 ConstantPool* const cp = _cp; 5627 5628 parse_constant_pool(stream, cp, cp_size, CHECK); 5629 5630 assert(cp_size == (const u2)cp->length(), "invariant"); 5631 5632 // ACCESS FLAGS 5633 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5634 5635 // Access flags 5636 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5637 5638 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5639 // Set abstract bit for old class files for backward compatibility 5640 flags |= JVM_ACC_ABSTRACT; 5641 } 5642 5643 _access_flags.set_flags(flags); 5644 5645 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK); 5646 5647 // This class and superclass 5648 _this_class_index = stream->get_u2_fast(); 5649 check_property( 5650 valid_cp_range(_this_class_index, cp_size) && 5651 cp->tag_at(_this_class_index).is_unresolved_klass(), 5652 "Invalid this class index %u in constant pool in class file %s", 5653 _this_class_index, CHECK); 5654 5655 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5656 assert(class_name_in_cp != NULL, "class_name can't be null"); 5657 5658 // Update _class_name which could be null previously 5659 // to reflect the name in the constant pool 5660 _class_name = class_name_in_cp; 5661 5662 // Don't need to check whether this class name is legal or not. 5663 // It has been checked when constant pool is parsed. 5664 // However, make sure it is not an array type. 5665 if (_need_verify) { 5666 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5667 "Bad class name in class file %s", 5668 CHECK); 5669 } 5670 5671 // Checks if name in class file matches requested name 5672 if (_requested_name != NULL && _requested_name != _class_name) { 5673 ResourceMark rm(THREAD); 5674 Exceptions::fthrow( 5675 THREAD_AND_LOCATION, 5676 vmSymbols::java_lang_NoClassDefFoundError(), 5677 "%s (wrong name: %s)", 5678 _class_name->as_C_string(), 5679 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5680 ); 5681 return; 5682 } 5683 5684 // Verification prevents us from creating names with dots in them, this 5685 // asserts that that's the case. 5686 assert(is_internal_format(_class_name), "external class name format used internally"); 5687 5688 if (!is_internal()) { 5689 if (log_is_enabled(Debug, class, preorder)){ 5690 ResourceMark rm(THREAD); 5691 outputStream* log = Log(class, preorder)::debug_stream(); 5692 log->print("%s", _class_name->as_klass_external_name()); 5693 if (stream->source() != NULL) { 5694 log->print(" source: %s", stream->source()); 5695 } 5696 log->cr(); 5697 } 5698 5699 #if INCLUDE_CDS 5700 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5701 // Only dump the classes that can be stored into CDS archive. 5702 // Anonymous classes such as generated LambdaForm classes are also not included. 5703 if (SystemDictionaryShared::is_sharing_possible(_loader_data) && 5704 _host_klass == NULL) { 5705 ResourceMark rm(THREAD); 5706 classlist_file->print_cr("%s", _class_name->as_C_string()); 5707 classlist_file->flush(); 5708 } 5709 } 5710 #endif 5711 } 5712 5713 // SUPERKLASS 5714 _super_class_index = stream->get_u2_fast(); 5715 _super_klass = parse_super_class(cp, 5716 _super_class_index, 5717 _need_verify, 5718 CHECK); 5719 5720 // Interfaces 5721 _itfs_len = stream->get_u2_fast(); 5722 parse_interfaces(stream, 5723 _itfs_len, 5724 cp, 5725 &_has_default_methods, 5726 CHECK); 5727 5728 assert(_local_interfaces != NULL, "invariant"); 5729 5730 // Fields (offsets are filled in later) 5731 _fac = new FieldAllocationCount(); 5732 parse_fields(stream, 5733 _access_flags.is_interface(), 5734 _fac, 5735 cp, 5736 cp_size, 5737 &_java_fields_count, 5738 CHECK); 5739 5740 assert(_fields != NULL, "invariant"); 5741 5742 // Methods 5743 AccessFlags promoted_flags; 5744 parse_methods(stream, 5745 _access_flags.is_interface(), 5746 &promoted_flags, 5747 &_has_final_method, 5748 &_declares_default_methods, 5749 CHECK); 5750 5751 assert(_methods != NULL, "invariant"); 5752 5753 // promote flags from parse_methods() to the klass' flags 5754 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5755 5756 if (_declares_default_methods) { 5757 _has_default_methods = true; 5758 } 5759 5760 // Additional attributes/annotations 5761 _parsed_annotations = new ClassAnnotationCollector(); 5762 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 5763 5764 assert(_inner_classes != NULL, "invariant"); 5765 5766 // Finalize the Annotations metadata object, 5767 // now that all annotation arrays have been created. 5768 create_combined_annotations(CHECK); 5769 5770 // Make sure this is the end of class file stream 5771 guarantee_property(stream->at_eos(), 5772 "Extra bytes at the end of class file %s", 5773 CHECK); 5774 5775 // all bytes in stream read and parsed 5776 } 5777 5778 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 5779 ConstantPool* cp, 5780 TRAPS) { 5781 assert(stream != NULL, "invariant"); 5782 assert(stream->at_eos(), "invariant"); 5783 assert(cp != NULL, "invariant"); 5784 assert(_loader_data != NULL, "invariant"); 5785 5786 // We check super class after class file is parsed and format is checked 5787 if (_super_class_index > 0 && NULL ==_super_klass) { 5788 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 5789 if (_access_flags.is_interface()) { 5790 // Before attempting to resolve the superclass, check for class format 5791 // errors not checked yet. 5792 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 5793 "Interfaces must have java.lang.Object as superclass in class file %s", 5794 CHECK); 5795 } 5796 _super_klass = (const InstanceKlass*) 5797 SystemDictionary::resolve_super_or_fail(_class_name, 5798 super_class_name, 5799 _loader_data->class_loader(), 5800 _protection_domain, 5801 true, 5802 CHECK); 5803 } 5804 5805 if (_super_klass != NULL) { 5806 if (_super_klass->has_default_methods()) { 5807 _has_default_methods = true; 5808 } 5809 5810 if (_super_klass->is_interface()) { 5811 ResourceMark rm(THREAD); 5812 Exceptions::fthrow( 5813 THREAD_AND_LOCATION, 5814 vmSymbols::java_lang_IncompatibleClassChangeError(), 5815 "class %s has interface %s as super class", 5816 _class_name->as_klass_external_name(), 5817 _super_klass->external_name() 5818 ); 5819 return; 5820 } 5821 // Make sure super class is not final 5822 if (_super_klass->is_final()) { 5823 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 5824 } 5825 } 5826 5827 // Compute the transitive list of all unique interfaces implemented by this class 5828 _transitive_interfaces = 5829 compute_transitive_interfaces(_super_klass, 5830 _local_interfaces, 5831 _loader_data, 5832 CHECK); 5833 5834 assert(_transitive_interfaces != NULL, "invariant"); 5835 5836 // sort methods 5837 _method_ordering = sort_methods(_methods); 5838 5839 _all_mirandas = new GrowableArray<Method*>(20); 5840 5841 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 5842 &_num_miranda_methods, 5843 _all_mirandas, 5844 _super_klass, 5845 _methods, 5846 _access_flags, 5847 _major_version, 5848 _loader_data->class_loader(), 5849 _class_name, 5850 _local_interfaces, 5851 CHECK); 5852 5853 // Size of Java itable (in words) 5854 _itable_size = _access_flags.is_interface() ? 0 : 5855 klassItable::compute_itable_size(_transitive_interfaces); 5856 5857 assert(_fac != NULL, "invariant"); 5858 assert(_parsed_annotations != NULL, "invariant"); 5859 5860 _field_info = new FieldLayoutInfo(); 5861 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 5862 5863 // Compute reference typ 5864 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 5865 5866 } 5867 5868 void ClassFileParser::set_klass(InstanceKlass* klass) { 5869 5870 #ifdef ASSERT 5871 if (klass != NULL) { 5872 assert(NULL == _klass, "leaking?"); 5873 } 5874 #endif 5875 5876 _klass = klass; 5877 } 5878 5879 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 5880 5881 #ifdef ASSERT 5882 if (klass != NULL) { 5883 assert(NULL == _klass_to_deallocate, "leaking?"); 5884 } 5885 #endif 5886 5887 _klass_to_deallocate = klass; 5888 } 5889 5890 // Caller responsible for ResourceMark 5891 // clone stream with rewound position 5892 const ClassFileStream* ClassFileParser::clone_stream() const { 5893 assert(_stream != NULL, "invariant"); 5894 5895 return _stream->clone(); 5896 } 5897 // ---------------------------------------------------------------------------- 5898 // debugging 5899 5900 #ifdef ASSERT 5901 5902 // return true if class_name contains no '.' (internal format is '/') 5903 bool ClassFileParser::is_internal_format(Symbol* class_name) { 5904 if (class_name != NULL) { 5905 ResourceMark rm; 5906 char* name = class_name->as_C_string(); 5907 return strchr(name, '.') == NULL; 5908 } else { 5909 return true; 5910 } 5911 } 5912 5913 #endif