1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 #include "precompiled.hpp" 25 #include "aot/aotLoader.hpp" 26 #include "classfile/classFileParser.hpp" 27 #include "classfile/classFileStream.hpp" 28 #include "classfile/classLoader.hpp" 29 #include "classfile/classLoaderData.inline.hpp" 30 #include "classfile/defaultMethods.hpp" 31 #include "classfile/dictionary.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/moduleEntry.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/verificationType.hpp" 37 #include "classfile/verifier.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "gc/shared/gcLocker.hpp" 40 #include "logging/log.hpp" 41 #include "memory/allocation.hpp" 42 #include "memory/metadataFactory.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.inline.hpp" 46 #include "oops/annotations.hpp" 47 #include "oops/fieldStreams.hpp" 48 #include "oops/instanceKlass.hpp" 49 #include "oops/instanceMirrorKlass.hpp" 50 #include "oops/klass.inline.hpp" 51 #include "oops/klassVtable.hpp" 52 #include "oops/metadata.hpp" 53 #include "oops/method.hpp" 54 #include "oops/oop.inline.hpp" 55 #include "oops/symbol.hpp" 56 #include "prims/jvm.h" 57 #include "prims/jvmtiExport.hpp" 58 #include "prims/jvmtiThreadState.hpp" 59 #include "runtime/javaCalls.hpp" 60 #include "runtime/perfData.hpp" 61 #include "runtime/reflection.hpp" 62 #include "runtime/signature.hpp" 63 #include "runtime/timer.hpp" 64 #include "services/classLoadingService.hpp" 65 #include "services/threadService.hpp" 66 #include "trace/traceMacros.hpp" 67 #include "utilities/array.hpp" 68 #include "utilities/exceptions.hpp" 69 #include "utilities/globalDefinitions.hpp" 70 #include "utilities/macros.hpp" 71 #include "utilities/ostream.hpp" 72 #include "utilities/resourceHash.hpp" 73 #if INCLUDE_CDS 74 #include "classfile/systemDictionaryShared.hpp" 75 #endif 76 77 // We generally try to create the oops directly when parsing, rather than 78 // allocating temporary data structures and copying the bytes twice. A 79 // temporary area is only needed when parsing utf8 entries in the constant 80 // pool and when parsing line number tables. 81 82 // We add assert in debug mode when class format is not checked. 83 84 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 85 #define JAVA_MIN_SUPPORTED_VERSION 45 86 #define JAVA_MAX_SUPPORTED_VERSION 53 87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 88 89 // Used for two backward compatibility reasons: 90 // - to check for new additions to the class file format in JDK1.5 91 // - to check for bug fixes in the format checker in JDK1.5 92 #define JAVA_1_5_VERSION 49 93 94 // Used for backward compatibility reasons: 95 // - to check for javac bug fixes that happened after 1.5 96 // - also used as the max version when running in jdk6 97 #define JAVA_6_VERSION 50 98 99 // Used for backward compatibility reasons: 100 // - to disallow argument and require ACC_STATIC for <clinit> methods 101 #define JAVA_7_VERSION 51 102 103 // Extension method support. 104 #define JAVA_8_VERSION 52 105 106 #define JAVA_9_VERSION 53 107 108 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 109 ConstantPool* cp, 110 const int length, 111 TRAPS) { 112 assert(stream != NULL, "invariant"); 113 assert(cp != NULL, "invariant"); 114 115 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 116 // this function (_current can be allocated in a register, with scalar 117 // replacement of aggregates). The _current pointer is copied back to 118 // stream() when this function returns. DON'T call another method within 119 // this method that uses stream(). 120 const ClassFileStream cfs1 = *stream; 121 const ClassFileStream* const cfs = &cfs1; 122 123 assert(cfs->allocated_on_stack(), "should be local"); 124 debug_only(const u1* const old_current = stream->current();) 125 126 // Used for batching symbol allocations. 127 const char* names[SymbolTable::symbol_alloc_batch_size]; 128 int lengths[SymbolTable::symbol_alloc_batch_size]; 129 int indices[SymbolTable::symbol_alloc_batch_size]; 130 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 131 int names_count = 0; 132 133 // parsing Index 0 is unused 134 for (int index = 1; index < length; index++) { 135 // Each of the following case guarantees one more byte in the stream 136 // for the following tag or the access_flags following constant pool, 137 // so we don't need bounds-check for reading tag. 138 const u1 tag = cfs->get_u1_fast(); 139 switch (tag) { 140 case JVM_CONSTANT_Class : { 141 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 142 const u2 name_index = cfs->get_u2_fast(); 143 cp->klass_index_at_put(index, name_index); 144 break; 145 } 146 case JVM_CONSTANT_Fieldref: { 147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 148 const u2 class_index = cfs->get_u2_fast(); 149 const u2 name_and_type_index = cfs->get_u2_fast(); 150 cp->field_at_put(index, class_index, name_and_type_index); 151 break; 152 } 153 case JVM_CONSTANT_Methodref: { 154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 155 const u2 class_index = cfs->get_u2_fast(); 156 const u2 name_and_type_index = cfs->get_u2_fast(); 157 cp->method_at_put(index, class_index, name_and_type_index); 158 break; 159 } 160 case JVM_CONSTANT_InterfaceMethodref: { 161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 162 const u2 class_index = cfs->get_u2_fast(); 163 const u2 name_and_type_index = cfs->get_u2_fast(); 164 cp->interface_method_at_put(index, class_index, name_and_type_index); 165 break; 166 } 167 case JVM_CONSTANT_String : { 168 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 169 const u2 string_index = cfs->get_u2_fast(); 170 cp->string_index_at_put(index, string_index); 171 break; 172 } 173 case JVM_CONSTANT_MethodHandle : 174 case JVM_CONSTANT_MethodType: { 175 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 176 classfile_parse_error( 177 "Class file version does not support constant tag %u in class file %s", 178 tag, CHECK); 179 } 180 if (tag == JVM_CONSTANT_MethodHandle) { 181 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 182 const u1 ref_kind = cfs->get_u1_fast(); 183 const u2 method_index = cfs->get_u2_fast(); 184 cp->method_handle_index_at_put(index, ref_kind, method_index); 185 } 186 else if (tag == JVM_CONSTANT_MethodType) { 187 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 188 const u2 signature_index = cfs->get_u2_fast(); 189 cp->method_type_index_at_put(index, signature_index); 190 } 191 else { 192 ShouldNotReachHere(); 193 } 194 break; 195 } 196 case JVM_CONSTANT_InvokeDynamic : { 197 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 198 classfile_parse_error( 199 "Class file version does not support constant tag %u in class file %s", 200 tag, CHECK); 201 } 202 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 203 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 204 const u2 name_and_type_index = cfs->get_u2_fast(); 205 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 206 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 207 } 208 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 209 break; 210 } 211 case JVM_CONSTANT_Integer: { 212 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 213 const u4 bytes = cfs->get_u4_fast(); 214 cp->int_at_put(index, (jint)bytes); 215 break; 216 } 217 case JVM_CONSTANT_Float: { 218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 219 const u4 bytes = cfs->get_u4_fast(); 220 cp->float_at_put(index, *(jfloat*)&bytes); 221 break; 222 } 223 case JVM_CONSTANT_Long: { 224 // A mangled type might cause you to overrun allocated memory 225 guarantee_property(index + 1 < length, 226 "Invalid constant pool entry %u in class file %s", 227 index, 228 CHECK); 229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 230 const u8 bytes = cfs->get_u8_fast(); 231 cp->long_at_put(index, bytes); 232 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 233 break; 234 } 235 case JVM_CONSTANT_Double: { 236 // A mangled type might cause you to overrun allocated memory 237 guarantee_property(index+1 < length, 238 "Invalid constant pool entry %u in class file %s", 239 index, 240 CHECK); 241 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 242 const u8 bytes = cfs->get_u8_fast(); 243 cp->double_at_put(index, *(jdouble*)&bytes); 244 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 245 break; 246 } 247 case JVM_CONSTANT_NameAndType: { 248 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 249 const u2 name_index = cfs->get_u2_fast(); 250 const u2 signature_index = cfs->get_u2_fast(); 251 cp->name_and_type_at_put(index, name_index, signature_index); 252 break; 253 } 254 case JVM_CONSTANT_Utf8 : { 255 cfs->guarantee_more(2, CHECK); // utf8_length 256 u2 utf8_length = cfs->get_u2_fast(); 257 const u1* utf8_buffer = cfs->get_u1_buffer(); 258 assert(utf8_buffer != NULL, "null utf8 buffer"); 259 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 260 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 261 cfs->skip_u1_fast(utf8_length); 262 263 // Before storing the symbol, make sure it's legal 264 if (_need_verify) { 265 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 266 } 267 268 if (has_cp_patch_at(index)) { 269 Handle patch = clear_cp_patch_at(index); 270 guarantee_property(java_lang_String::is_instance(patch()), 271 "Illegal utf8 patch at %d in class file %s", 272 index, 273 CHECK); 274 const char* const str = java_lang_String::as_utf8_string(patch()); 275 // (could use java_lang_String::as_symbol instead, but might as well batch them) 276 utf8_buffer = (const u1*) str; 277 utf8_length = (int) strlen(str); 278 } 279 280 unsigned int hash; 281 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 282 utf8_length, 283 hash); 284 if (result == NULL) { 285 names[names_count] = (const char*)utf8_buffer; 286 lengths[names_count] = utf8_length; 287 indices[names_count] = index; 288 hashValues[names_count++] = hash; 289 if (names_count == SymbolTable::symbol_alloc_batch_size) { 290 SymbolTable::new_symbols(_loader_data, 291 cp, 292 names_count, 293 names, 294 lengths, 295 indices, 296 hashValues, 297 CHECK); 298 names_count = 0; 299 } 300 } else { 301 cp->symbol_at_put(index, result); 302 } 303 break; 304 } 305 default: { 306 classfile_parse_error("Unknown constant tag %u in class file %s", 307 tag, 308 CHECK); 309 break; 310 } 311 } // end of switch(tag) 312 } // end of for 313 314 // Allocate the remaining symbols 315 if (names_count > 0) { 316 SymbolTable::new_symbols(_loader_data, 317 cp, 318 names_count, 319 names, 320 lengths, 321 indices, 322 hashValues, 323 CHECK); 324 } 325 326 // Copy _current pointer of local copy back to stream. 327 assert(stream->current() == old_current, "non-exclusive use of stream"); 328 stream->set_current(cfs1.current()); 329 330 } 331 332 static inline bool valid_cp_range(int index, int length) { 333 return (index > 0 && index < length); 334 } 335 336 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 337 assert(cp != NULL, "invariant"); 338 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 339 return cp->symbol_at(index); 340 } 341 return NULL; 342 } 343 344 #ifdef ASSERT 345 PRAGMA_DIAG_PUSH 346 PRAGMA_FORMAT_NONLITERAL_IGNORED 347 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 348 ResourceMark rm(THREAD); 349 fatal(msg, _class_name->as_C_string()); 350 } 351 352 void ClassFileParser::report_assert_property_failure(const char* msg, 353 int index, 354 TRAPS) const { 355 ResourceMark rm(THREAD); 356 fatal(msg, index, _class_name->as_C_string()); 357 } 358 PRAGMA_DIAG_POP 359 #endif 360 361 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 362 ConstantPool* const cp, 363 const int length, 364 TRAPS) { 365 assert(cp != NULL, "invariant"); 366 assert(stream != NULL, "invariant"); 367 368 // parsing constant pool entries 369 parse_constant_pool_entries(stream, cp, length, CHECK); 370 371 int index = 1; // declared outside of loops for portability 372 373 // first verification pass - validate cross references 374 // and fixup class and string constants 375 for (index = 1; index < length; index++) { // Index 0 is unused 376 const jbyte tag = cp->tag_at(index).value(); 377 switch (tag) { 378 case JVM_CONSTANT_Class: { 379 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 380 break; 381 } 382 case JVM_CONSTANT_Fieldref: 383 // fall through 384 case JVM_CONSTANT_Methodref: 385 // fall through 386 case JVM_CONSTANT_InterfaceMethodref: { 387 if (!_need_verify) break; 388 const int klass_ref_index = cp->klass_ref_index_at(index); 389 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 390 check_property(valid_klass_reference_at(klass_ref_index), 391 "Invalid constant pool index %u in class file %s", 392 klass_ref_index, CHECK); 393 check_property(valid_cp_range(name_and_type_ref_index, length) && 394 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 395 "Invalid constant pool index %u in class file %s", 396 name_and_type_ref_index, CHECK); 397 break; 398 } 399 case JVM_CONSTANT_String: { 400 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 401 break; 402 } 403 case JVM_CONSTANT_Integer: 404 break; 405 case JVM_CONSTANT_Float: 406 break; 407 case JVM_CONSTANT_Long: 408 case JVM_CONSTANT_Double: { 409 index++; 410 check_property( 411 (index < length && cp->tag_at(index).is_invalid()), 412 "Improper constant pool long/double index %u in class file %s", 413 index, CHECK); 414 break; 415 } 416 case JVM_CONSTANT_NameAndType: { 417 if (!_need_verify) break; 418 const int name_ref_index = cp->name_ref_index_at(index); 419 const int signature_ref_index = cp->signature_ref_index_at(index); 420 check_property(valid_symbol_at(name_ref_index), 421 "Invalid constant pool index %u in class file %s", 422 name_ref_index, CHECK); 423 check_property(valid_symbol_at(signature_ref_index), 424 "Invalid constant pool index %u in class file %s", 425 signature_ref_index, CHECK); 426 break; 427 } 428 case JVM_CONSTANT_Utf8: 429 break; 430 case JVM_CONSTANT_UnresolvedClass: // fall-through 431 case JVM_CONSTANT_UnresolvedClassInError: { 432 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 433 break; 434 } 435 case JVM_CONSTANT_ClassIndex: { 436 const int class_index = cp->klass_index_at(index); 437 check_property(valid_symbol_at(class_index), 438 "Invalid constant pool index %u in class file %s", 439 class_index, CHECK); 440 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); 441 break; 442 } 443 case JVM_CONSTANT_StringIndex: { 444 const int string_index = cp->string_index_at(index); 445 check_property(valid_symbol_at(string_index), 446 "Invalid constant pool index %u in class file %s", 447 string_index, CHECK); 448 Symbol* const sym = cp->symbol_at(string_index); 449 cp->unresolved_string_at_put(index, sym); 450 break; 451 } 452 case JVM_CONSTANT_MethodHandle: { 453 const int ref_index = cp->method_handle_index_at(index); 454 check_property(valid_cp_range(ref_index, length), 455 "Invalid constant pool index %u in class file %s", 456 ref_index, CHECK); 457 const constantTag tag = cp->tag_at(ref_index); 458 const int ref_kind = cp->method_handle_ref_kind_at(index); 459 460 switch (ref_kind) { 461 case JVM_REF_getField: 462 case JVM_REF_getStatic: 463 case JVM_REF_putField: 464 case JVM_REF_putStatic: { 465 check_property( 466 tag.is_field(), 467 "Invalid constant pool index %u in class file %s (not a field)", 468 ref_index, CHECK); 469 break; 470 } 471 case JVM_REF_invokeVirtual: 472 case JVM_REF_newInvokeSpecial: { 473 check_property( 474 tag.is_method(), 475 "Invalid constant pool index %u in class file %s (not a method)", 476 ref_index, CHECK); 477 break; 478 } 479 case JVM_REF_invokeStatic: 480 case JVM_REF_invokeSpecial: { 481 check_property( 482 tag.is_method() || 483 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 484 "Invalid constant pool index %u in class file %s (not a method)", 485 ref_index, CHECK); 486 break; 487 } 488 case JVM_REF_invokeInterface: { 489 check_property( 490 tag.is_interface_method(), 491 "Invalid constant pool index %u in class file %s (not an interface method)", 492 ref_index, CHECK); 493 break; 494 } 495 default: { 496 classfile_parse_error( 497 "Bad method handle kind at constant pool index %u in class file %s", 498 index, CHECK); 499 } 500 } // switch(refkind) 501 // Keep the ref_index unchanged. It will be indirected at link-time. 502 break; 503 } // case MethodHandle 504 case JVM_CONSTANT_MethodType: { 505 const int ref_index = cp->method_type_index_at(index); 506 check_property(valid_symbol_at(ref_index), 507 "Invalid constant pool index %u in class file %s", 508 ref_index, CHECK); 509 break; 510 } 511 case JVM_CONSTANT_InvokeDynamic: { 512 const int name_and_type_ref_index = 513 cp->invoke_dynamic_name_and_type_ref_index_at(index); 514 515 check_property(valid_cp_range(name_and_type_ref_index, length) && 516 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 517 "Invalid constant pool index %u in class file %s", 518 name_and_type_ref_index, CHECK); 519 // bootstrap specifier index must be checked later, 520 // when BootstrapMethods attr is available 521 break; 522 } 523 default: { 524 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 525 ShouldNotReachHere(); 526 break; 527 } 528 } // switch(tag) 529 } // end of for 530 531 if (_cp_patches != NULL) { 532 // need to treat this_class specially... 533 int this_class_index; 534 { 535 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 536 const u1* const mark = stream->current(); 537 stream->skip_u2_fast(1); // skip flags 538 this_class_index = stream->get_u2_fast(); 539 stream->set_current(mark); // revert to mark 540 } 541 542 for (index = 1; index < length; index++) { // Index 0 is unused 543 if (has_cp_patch_at(index)) { 544 guarantee_property(index != this_class_index, 545 "Illegal constant pool patch to self at %d in class file %s", 546 index, CHECK); 547 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 548 } 549 } 550 } 551 552 if (!_need_verify) { 553 return; 554 } 555 556 // second verification pass - checks the strings are of the right format. 557 // but not yet to the other entries 558 for (index = 1; index < length; index++) { 559 const jbyte tag = cp->tag_at(index).value(); 560 switch (tag) { 561 case JVM_CONSTANT_UnresolvedClass: { 562 const Symbol* const class_name = cp->klass_name_at(index); 563 // check the name, even if _cp_patches will overwrite it 564 verify_legal_class_name(class_name, CHECK); 565 break; 566 } 567 case JVM_CONSTANT_NameAndType: { 568 if (_need_verify) { 569 const int sig_index = cp->signature_ref_index_at(index); 570 const int name_index = cp->name_ref_index_at(index); 571 const Symbol* const name = cp->symbol_at(name_index); 572 const Symbol* const sig = cp->symbol_at(sig_index); 573 guarantee_property(sig->utf8_length() != 0, 574 "Illegal zero length constant pool entry at %d in class %s", 575 sig_index, CHECK); 576 guarantee_property(name->utf8_length() != 0, 577 "Illegal zero length constant pool entry at %d in class %s", 578 name_index, CHECK); 579 580 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 581 // Format check method name and signature 582 verify_legal_method_name(name, CHECK); 583 verify_legal_method_signature(name, sig, CHECK); 584 } else { 585 // Format check field name and signature 586 verify_legal_field_name(name, CHECK); 587 verify_legal_field_signature(name, sig, CHECK); 588 } 589 } 590 break; 591 } 592 case JVM_CONSTANT_InvokeDynamic: 593 case JVM_CONSTANT_Fieldref: 594 case JVM_CONSTANT_Methodref: 595 case JVM_CONSTANT_InterfaceMethodref: { 596 const int name_and_type_ref_index = 597 cp->name_and_type_ref_index_at(index); 598 // already verified to be utf8 599 const int name_ref_index = 600 cp->name_ref_index_at(name_and_type_ref_index); 601 // already verified to be utf8 602 const int signature_ref_index = 603 cp->signature_ref_index_at(name_and_type_ref_index); 604 const Symbol* const name = cp->symbol_at(name_ref_index); 605 const Symbol* const signature = cp->symbol_at(signature_ref_index); 606 if (tag == JVM_CONSTANT_Fieldref) { 607 if (_need_verify) { 608 // Field name and signature are verified above, when iterating NameAndType_info. 609 // Need only to be sure signature is non-zero length and the right type. 610 if (signature->utf8_length() == 0 || 611 signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 612 throwIllegalSignature("Field", name, signature, CHECK); 613 } 614 } 615 } else { 616 if (_need_verify) { 617 // Method name and signature are verified above, when iterating NameAndType_info. 618 // Need only to be sure signature is non-zero length and the right type. 619 if (signature->utf8_length() == 0 || 620 signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 621 throwIllegalSignature("Method", name, signature, CHECK); 622 } 623 } 624 // 4509014: If a class method name begins with '<', it must be "<init>" 625 const unsigned int name_len = name->utf8_length(); 626 if (tag == JVM_CONSTANT_Methodref && 627 name_len != 0 && 628 name->byte_at(0) == '<' && 629 name != vmSymbols::object_initializer_name()) { 630 classfile_parse_error( 631 "Bad method name at constant pool index %u in class file %s", 632 name_ref_index, CHECK); 633 } 634 } 635 break; 636 } 637 case JVM_CONSTANT_MethodHandle: { 638 const int ref_index = cp->method_handle_index_at(index); 639 const int ref_kind = cp->method_handle_ref_kind_at(index); 640 switch (ref_kind) { 641 case JVM_REF_invokeVirtual: 642 case JVM_REF_invokeStatic: 643 case JVM_REF_invokeSpecial: 644 case JVM_REF_newInvokeSpecial: { 645 const int name_and_type_ref_index = 646 cp->name_and_type_ref_index_at(ref_index); 647 const int name_ref_index = 648 cp->name_ref_index_at(name_and_type_ref_index); 649 const Symbol* const name = cp->symbol_at(name_ref_index); 650 if (ref_kind == JVM_REF_newInvokeSpecial) { 651 if (name != vmSymbols::object_initializer_name()) { 652 classfile_parse_error( 653 "Bad constructor name at constant pool index %u in class file %s", 654 name_ref_index, CHECK); 655 } 656 } else { 657 if (name == vmSymbols::object_initializer_name()) { 658 classfile_parse_error( 659 "Bad method name at constant pool index %u in class file %s", 660 name_ref_index, CHECK); 661 } 662 } 663 break; 664 } 665 // Other ref_kinds are already fully checked in previous pass. 666 } // switch(ref_kind) 667 break; 668 } 669 case JVM_CONSTANT_MethodType: { 670 const Symbol* const no_name = vmSymbols::type_name(); // place holder 671 const Symbol* const signature = cp->method_type_signature_at(index); 672 verify_legal_method_signature(no_name, signature, CHECK); 673 break; 674 } 675 case JVM_CONSTANT_Utf8: { 676 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 677 } 678 } // switch(tag) 679 } // end of for 680 } 681 682 void ClassFileParser::patch_constant_pool(ConstantPool* cp, 683 int index, 684 Handle patch, 685 TRAPS) { 686 assert(cp != NULL, "invariant"); 687 688 BasicType patch_type = T_VOID; 689 690 switch (cp->tag_at(index).value()) { 691 692 case JVM_CONSTANT_UnresolvedClass: { 693 // Patching a class means pre-resolving it. 694 // The name in the constant pool is ignored. 695 if (java_lang_Class::is_instance(patch())) { 696 guarantee_property(!java_lang_Class::is_primitive(patch()), 697 "Illegal class patch at %d in class file %s", 698 index, CHECK); 699 cp->klass_at_put(index, java_lang_Class::as_Klass(patch())); 700 } else { 701 guarantee_property(java_lang_String::is_instance(patch()), 702 "Illegal class patch at %d in class file %s", 703 index, CHECK); 704 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 705 cp->unresolved_klass_at_put(index, name); 706 } 707 break; 708 } 709 710 case JVM_CONSTANT_String: { 711 // skip this patch and don't clear it. Needs the oop array for resolved 712 // references to be created first. 713 return; 714 } 715 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 716 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 717 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 718 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 719 patch_prim: 720 { 721 jvalue value; 722 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 723 guarantee_property(value_type == patch_type, 724 "Illegal primitive patch at %d in class file %s", 725 index, CHECK); 726 switch (value_type) { 727 case T_INT: cp->int_at_put(index, value.i); break; 728 case T_FLOAT: cp->float_at_put(index, value.f); break; 729 case T_LONG: cp->long_at_put(index, value.j); break; 730 case T_DOUBLE: cp->double_at_put(index, value.d); break; 731 default: assert(false, ""); 732 } 733 } // end patch_prim label 734 break; 735 736 default: { 737 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 738 guarantee_property(!has_cp_patch_at(index), 739 "Illegal unexpected patch at %d in class file %s", 740 index, CHECK); 741 return; 742 } 743 } // end of switch(tag) 744 745 // On fall-through, mark the patch as used. 746 clear_cp_patch_at(index); 747 } 748 class NameSigHash: public ResourceObj { 749 public: 750 const Symbol* _name; // name 751 const Symbol* _sig; // signature 752 NameSigHash* _next; // Next entry in hash table 753 }; 754 755 static const int HASH_ROW_SIZE = 256; 756 757 static unsigned int hash(const Symbol* name, const Symbol* sig) { 758 unsigned int raw_hash = 0; 759 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 760 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 761 762 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 763 } 764 765 766 static void initialize_hashtable(NameSigHash** table) { 767 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 768 } 769 // Return false if the name/sig combination is found in table. 770 // Return true if no duplicate is found. And name/sig is added as a new entry in table. 771 // The old format checker uses heap sort to find duplicates. 772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle 773 // of table since we don't expect Symbol*'s to move. 774 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 775 assert(name != NULL, "name in constant pool is NULL"); 776 777 // First lookup for duplicates 778 int index = hash(name, sig); 779 NameSigHash* entry = table[index]; 780 while (entry != NULL) { 781 if (entry->_name == name && entry->_sig == sig) { 782 return false; 783 } 784 entry = entry->_next; 785 } 786 787 // No duplicate is found, allocate a new entry and fill it. 788 entry = new NameSigHash(); 789 entry->_name = name; 790 entry->_sig = sig; 791 792 // Insert into hash table 793 entry->_next = table[index]; 794 table[index] = entry; 795 796 return true; 797 } 798 799 // Side-effects: populates the _local_interfaces field 800 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 801 const int itfs_len, 802 ConstantPool* const cp, 803 bool* const has_nonstatic_concrete_methods, 804 TRAPS) { 805 assert(stream != NULL, "invariant"); 806 assert(cp != NULL, "invariant"); 807 assert(has_nonstatic_concrete_methods != NULL, "invariant"); 808 809 if (itfs_len == 0) { 810 _local_interfaces = Universe::the_empty_klass_array(); 811 } else { 812 assert(itfs_len > 0, "only called for len>0"); 813 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 814 815 int index; 816 for (index = 0; index < itfs_len; index++) { 817 const u2 interface_index = stream->get_u2(CHECK); 818 KlassHandle interf; 819 check_property( 820 valid_klass_reference_at(interface_index), 821 "Interface name has bad constant pool index %u in class file %s", 822 interface_index, CHECK); 823 if (cp->tag_at(interface_index).is_klass()) { 824 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); 825 } else { 826 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 827 828 // Don't need to check legal name because it's checked when parsing constant pool. 829 // But need to make sure it's not an array type. 830 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 831 "Bad interface name in class file %s", CHECK); 832 833 // Call resolve_super so classcircularity is checked 834 const Klass* const k = 835 SystemDictionary::resolve_super_or_fail(_class_name, 836 unresolved_klass, 837 Handle(THREAD, _loader_data->class_loader()), 838 _protection_domain, 839 false, 840 CHECK); 841 interf = KlassHandle(THREAD, k); 842 } 843 844 if (!interf()->is_interface()) { 845 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 846 "Implementing class"); 847 } 848 849 if (InstanceKlass::cast(interf())->has_nonstatic_concrete_methods()) { 850 *has_nonstatic_concrete_methods = true; 851 } 852 _local_interfaces->at_put(index, interf()); 853 } 854 855 if (!_need_verify || itfs_len <= 1) { 856 return; 857 } 858 859 // Check if there's any duplicates in interfaces 860 ResourceMark rm(THREAD); 861 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 862 NameSigHash*, 863 HASH_ROW_SIZE); 864 initialize_hashtable(interface_names); 865 bool dup = false; 866 const Symbol* name = NULL; 867 { 868 debug_only(NoSafepointVerifier nsv;) 869 for (index = 0; index < itfs_len; index++) { 870 const Klass* const k = _local_interfaces->at(index); 871 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 \"%s\" in class file %s", 881 name->as_C_string(), CHECK); 882 } 883 } 884 } 885 886 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 887 int constantvalue_index, 888 int signature_index, 889 TRAPS) const { 890 // Make sure the constant pool entry is of a type appropriate to this field 891 guarantee_property( 892 (constantvalue_index > 0 && 893 constantvalue_index < cp->length()), 894 "Bad initial value index %u in ConstantValue attribute in class file %s", 895 constantvalue_index, CHECK); 896 897 const constantTag value_type = cp->tag_at(constantvalue_index); 898 switch(cp->basic_type_for_signature_at(signature_index)) { 899 case T_LONG: { 900 guarantee_property(value_type.is_long(), 901 "Inconsistent constant value type in class file %s", 902 CHECK); 903 break; 904 } 905 case T_FLOAT: { 906 guarantee_property(value_type.is_float(), 907 "Inconsistent constant value type in class file %s", 908 CHECK); 909 break; 910 } 911 case T_DOUBLE: { 912 guarantee_property(value_type.is_double(), 913 "Inconsistent constant value type in class file %s", 914 CHECK); 915 break; 916 } 917 case T_BYTE: 918 case T_CHAR: 919 case T_SHORT: 920 case T_BOOLEAN: 921 case T_INT: { 922 guarantee_property(value_type.is_int(), 923 "Inconsistent constant value type in class file %s", 924 CHECK); 925 break; 926 } 927 case T_OBJECT: { 928 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 929 && value_type.is_string()), 930 "Bad string initial value in class file %s", 931 CHECK); 932 break; 933 } 934 default: { 935 classfile_parse_error("Unable to set initial value %u in class file %s", 936 constantvalue_index, 937 CHECK); 938 } 939 } 940 } 941 942 class AnnotationCollector : public ResourceObj{ 943 public: 944 enum Location { _in_field, _in_method, _in_class }; 945 enum ID { 946 _unknown = 0, 947 _method_CallerSensitive, 948 _method_ForceInline, 949 _method_DontInline, 950 _method_InjectedProfile, 951 _method_LambdaForm_Compiled, 952 _method_LambdaForm_Hidden, 953 _method_HotSpotIntrinsicCandidate, 954 _jdk_internal_vm_annotation_Contended, 955 _field_Stable, 956 _jdk_internal_vm_annotation_ReservedStackAccess, 957 _annotation_LIMIT 958 }; 959 const Location _location; 960 int _annotations_present; 961 u2 _contended_group; 962 963 AnnotationCollector(Location location) 964 : _location(location), _annotations_present(0) 965 { 966 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 967 } 968 // If this annotation name has an ID, report it (or _none). 969 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 970 // Set the annotation name: 971 void set_annotation(ID id) { 972 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 973 _annotations_present |= nth_bit((int)id); 974 } 975 976 void remove_annotation(ID id) { 977 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 978 _annotations_present &= ~nth_bit((int)id); 979 } 980 981 // Report if the annotation is present. 982 bool has_any_annotations() const { return _annotations_present != 0; } 983 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 984 985 void set_contended_group(u2 group) { _contended_group = group; } 986 u2 contended_group() const { return _contended_group; } 987 988 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 989 990 void set_stable(bool stable) { set_annotation(_field_Stable); } 991 bool is_stable() const { return has_annotation(_field_Stable); } 992 }; 993 994 // This class also doubles as a holder for metadata cleanup. 995 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 996 private: 997 ClassLoaderData* _loader_data; 998 AnnotationArray* _field_annotations; 999 AnnotationArray* _field_type_annotations; 1000 public: 1001 FieldAnnotationCollector(ClassLoaderData* loader_data) : 1002 AnnotationCollector(_in_field), 1003 _loader_data(loader_data), 1004 _field_annotations(NULL), 1005 _field_type_annotations(NULL) {} 1006 ~FieldAnnotationCollector(); 1007 void apply_to(FieldInfo* f); 1008 AnnotationArray* field_annotations() { return _field_annotations; } 1009 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1010 1011 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1012 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1013 }; 1014 1015 class MethodAnnotationCollector : public AnnotationCollector{ 1016 public: 1017 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1018 void apply_to(methodHandle m); 1019 }; 1020 1021 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1022 public: 1023 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1024 void apply_to(InstanceKlass* ik); 1025 }; 1026 1027 1028 static int skip_annotation_value(const u1*, int, int); // fwd decl 1029 1030 // Safely increment index by val if does not pass limit 1031 #define SAFE_ADD(index, limit, val) \ 1032 if (index >= limit - val) return limit; \ 1033 index += val; 1034 1035 // Skip an annotation. Return >=limit if there is any problem. 1036 static int skip_annotation(const u1* buffer, int limit, int index) { 1037 assert(buffer != NULL, "invariant"); 1038 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1039 // value := switch (tag:u1) { ... } 1040 SAFE_ADD(index, limit, 4); // skip atype and read nmem 1041 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1042 while (--nmem >= 0 && index < limit) { 1043 SAFE_ADD(index, limit, 2); // skip member 1044 index = skip_annotation_value(buffer, limit, index); 1045 } 1046 return index; 1047 } 1048 1049 // Skip an annotation value. Return >=limit if there is any problem. 1050 static int skip_annotation_value(const u1* buffer, int limit, int index) { 1051 assert(buffer != NULL, "invariant"); 1052 1053 // value := switch (tag:u1) { 1054 // case B, C, I, S, Z, D, F, J, c: con:u2; 1055 // case e: e_class:u2 e_name:u2; 1056 // case s: s_con:u2; 1057 // case [: do(nval:u2) {value}; 1058 // case @: annotation; 1059 // case s: s_con:u2; 1060 // } 1061 SAFE_ADD(index, limit, 1); // read tag 1062 const u1 tag = buffer[index - 1]; 1063 switch (tag) { 1064 case 'B': 1065 case 'C': 1066 case 'I': 1067 case 'S': 1068 case 'Z': 1069 case 'D': 1070 case 'F': 1071 case 'J': 1072 case 'c': 1073 case 's': 1074 SAFE_ADD(index, limit, 2); // skip con or s_con 1075 break; 1076 case 'e': 1077 SAFE_ADD(index, limit, 4); // skip e_class, e_name 1078 break; 1079 case '[': 1080 { 1081 SAFE_ADD(index, limit, 2); // read nval 1082 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1083 while (--nval >= 0 && index < limit) { 1084 index = skip_annotation_value(buffer, limit, index); 1085 } 1086 } 1087 break; 1088 case '@': 1089 index = skip_annotation(buffer, limit, index); 1090 break; 1091 default: 1092 return limit; // bad tag byte 1093 } 1094 return index; 1095 } 1096 1097 // Sift through annotations, looking for those significant to the VM: 1098 static void parse_annotations(const ConstantPool* const cp, 1099 const u1* buffer, int limit, 1100 AnnotationCollector* coll, 1101 ClassLoaderData* loader_data, 1102 TRAPS) { 1103 1104 assert(cp != NULL, "invariant"); 1105 assert(buffer != NULL, "invariant"); 1106 assert(coll != NULL, "invariant"); 1107 assert(loader_data != NULL, "invariant"); 1108 1109 // annotations := do(nann:u2) {annotation} 1110 int index = 2; // read nann 1111 if (index >= limit) return; 1112 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1113 enum { // initial annotation layout 1114 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1115 count_off = 2, // u2 such as 1 (one value) 1116 member_off = 4, // utf8 such as 'value' 1117 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1118 e_tag_val = 'e', 1119 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1120 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1121 e_size = 11, // end of 'e' annotation 1122 c_tag_val = 'c', // payload is type 1123 c_con_off = 7, // utf8 payload, such as 'I' 1124 c_size = 9, // end of 'c' annotation 1125 s_tag_val = 's', // payload is String 1126 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1127 s_size = 9, 1128 min_size = 6 // smallest possible size (zero members) 1129 }; 1130 // Cannot add min_size to index in case of overflow MAX_INT 1131 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) { 1132 int index0 = index; 1133 index = skip_annotation(buffer, limit, index); 1134 const u1* const abase = buffer + index0; 1135 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1136 const int count = Bytes::get_Java_u2((address)abase + count_off); 1137 const Symbol* const aname = check_symbol_at(cp, atype); 1138 if (aname == NULL) break; // invalid annotation name 1139 const Symbol* member = NULL; 1140 if (count >= 1) { 1141 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1142 member = check_symbol_at(cp, member_index); 1143 if (member == NULL) break; // invalid member name 1144 } 1145 1146 // Here is where parsing particular annotations will take place. 1147 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1148 if (AnnotationCollector::_unknown == id) continue; 1149 coll->set_annotation(id); 1150 1151 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1152 // @Contended can optionally specify the contention group. 1153 // 1154 // Contended group defines the equivalence class over the fields: 1155 // the fields within the same contended group are not treated distinct. 1156 // The only exception is default group, which does not incur the 1157 // equivalence. Naturally, contention group for classes is meaningless. 1158 // 1159 // While the contention group is specified as String, annotation 1160 // values are already interned, and we might as well use the constant 1161 // pool index as the group tag. 1162 // 1163 u2 group_index = 0; // default contended group 1164 if (count == 1 1165 && s_size == (index - index0) // match size 1166 && s_tag_val == *(abase + tag_off) 1167 && member == vmSymbols::value_name()) { 1168 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1169 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1170 group_index = 0; // default contended group 1171 } 1172 } 1173 coll->set_contended_group(group_index); 1174 } 1175 } 1176 } 1177 1178 1179 // Parse attributes for a field. 1180 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1181 u2 attributes_count, 1182 bool is_static, u2 signature_index, 1183 u2* const constantvalue_index_addr, 1184 bool* const is_synthetic_addr, 1185 u2* const generic_signature_index_addr, 1186 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1187 TRAPS) { 1188 assert(cfs != NULL, "invariant"); 1189 assert(constantvalue_index_addr != NULL, "invariant"); 1190 assert(is_synthetic_addr != NULL, "invariant"); 1191 assert(generic_signature_index_addr != NULL, "invariant"); 1192 assert(parsed_annotations != NULL, "invariant"); 1193 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1194 1195 u2 constantvalue_index = 0; 1196 u2 generic_signature_index = 0; 1197 bool is_synthetic = false; 1198 const u1* runtime_visible_annotations = NULL; 1199 int runtime_visible_annotations_length = 0; 1200 const u1* runtime_invisible_annotations = NULL; 1201 int runtime_invisible_annotations_length = 0; 1202 const u1* runtime_visible_type_annotations = NULL; 1203 int runtime_visible_type_annotations_length = 0; 1204 const u1* runtime_invisible_type_annotations = NULL; 1205 int runtime_invisible_type_annotations_length = 0; 1206 bool runtime_invisible_annotations_exists = false; 1207 bool runtime_invisible_type_annotations_exists = false; 1208 const ConstantPool* const cp = _cp; 1209 1210 while (attributes_count--) { 1211 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1212 const u2 attribute_name_index = cfs->get_u2_fast(); 1213 const u4 attribute_length = cfs->get_u4_fast(); 1214 check_property(valid_symbol_at(attribute_name_index), 1215 "Invalid field attribute index %u in class file %s", 1216 attribute_name_index, 1217 CHECK); 1218 1219 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1220 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1221 // ignore if non-static 1222 if (constantvalue_index != 0) { 1223 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1224 } 1225 check_property( 1226 attribute_length == 2, 1227 "Invalid ConstantValue field attribute length %u in class file %s", 1228 attribute_length, CHECK); 1229 1230 constantvalue_index = cfs->get_u2(CHECK); 1231 if (_need_verify) { 1232 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1233 } 1234 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1235 if (attribute_length != 0) { 1236 classfile_parse_error( 1237 "Invalid Synthetic field attribute length %u in class file %s", 1238 attribute_length, CHECK); 1239 } 1240 is_synthetic = true; 1241 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1242 if (attribute_length != 0) { 1243 classfile_parse_error( 1244 "Invalid Deprecated field attribute length %u in class file %s", 1245 attribute_length, CHECK); 1246 } 1247 } else if (_major_version >= JAVA_1_5_VERSION) { 1248 if (attribute_name == vmSymbols::tag_signature()) { 1249 if (attribute_length != 2) { 1250 classfile_parse_error( 1251 "Wrong size %u for field's Signature attribute in class file %s", 1252 attribute_length, CHECK); 1253 } 1254 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1255 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1256 if (runtime_visible_annotations != NULL) { 1257 classfile_parse_error( 1258 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1259 } 1260 runtime_visible_annotations_length = attribute_length; 1261 runtime_visible_annotations = cfs->get_u1_buffer(); 1262 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1263 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 1264 parse_annotations(cp, 1265 runtime_visible_annotations, 1266 runtime_visible_annotations_length, 1267 parsed_annotations, 1268 _loader_data, 1269 CHECK); 1270 cfs->skip_u1_fast(runtime_visible_annotations_length); 1271 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1272 if (runtime_invisible_annotations_exists) { 1273 classfile_parse_error( 1274 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1275 } 1276 runtime_invisible_annotations_exists = true; 1277 if (PreserveAllAnnotations) { 1278 runtime_invisible_annotations_length = attribute_length; 1279 runtime_invisible_annotations = cfs->get_u1_buffer(); 1280 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1281 } 1282 cfs->skip_u1(attribute_length, CHECK); 1283 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1284 if (runtime_visible_type_annotations != NULL) { 1285 classfile_parse_error( 1286 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1287 } 1288 runtime_visible_type_annotations_length = attribute_length; 1289 runtime_visible_type_annotations = cfs->get_u1_buffer(); 1290 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1291 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1292 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1293 if (runtime_invisible_type_annotations_exists) { 1294 classfile_parse_error( 1295 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1296 } else { 1297 runtime_invisible_type_annotations_exists = true; 1298 } 1299 if (PreserveAllAnnotations) { 1300 runtime_invisible_type_annotations_length = attribute_length; 1301 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 1302 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1303 } 1304 cfs->skip_u1(attribute_length, CHECK); 1305 } else { 1306 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1307 } 1308 } else { 1309 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1310 } 1311 } 1312 1313 *constantvalue_index_addr = constantvalue_index; 1314 *is_synthetic_addr = is_synthetic; 1315 *generic_signature_index_addr = generic_signature_index; 1316 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1317 runtime_visible_annotations_length, 1318 runtime_invisible_annotations, 1319 runtime_invisible_annotations_length, 1320 CHECK); 1321 parsed_annotations->set_field_annotations(a); 1322 a = assemble_annotations(runtime_visible_type_annotations, 1323 runtime_visible_type_annotations_length, 1324 runtime_invisible_type_annotations, 1325 runtime_invisible_type_annotations_length, 1326 CHECK); 1327 parsed_annotations->set_field_type_annotations(a); 1328 return; 1329 } 1330 1331 1332 // Field allocation types. Used for computing field offsets. 1333 1334 enum FieldAllocationType { 1335 STATIC_OOP, // Oops 1336 STATIC_BYTE, // Boolean, Byte, char 1337 STATIC_SHORT, // shorts 1338 STATIC_WORD, // ints 1339 STATIC_DOUBLE, // aligned long or double 1340 NONSTATIC_OOP, 1341 NONSTATIC_BYTE, 1342 NONSTATIC_SHORT, 1343 NONSTATIC_WORD, 1344 NONSTATIC_DOUBLE, 1345 MAX_FIELD_ALLOCATION_TYPE, 1346 BAD_ALLOCATION_TYPE = -1 1347 }; 1348 1349 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1350 BAD_ALLOCATION_TYPE, // 0 1351 BAD_ALLOCATION_TYPE, // 1 1352 BAD_ALLOCATION_TYPE, // 2 1353 BAD_ALLOCATION_TYPE, // 3 1354 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1355 NONSTATIC_SHORT, // T_CHAR = 5, 1356 NONSTATIC_WORD, // T_FLOAT = 6, 1357 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1358 NONSTATIC_BYTE, // T_BYTE = 8, 1359 NONSTATIC_SHORT, // T_SHORT = 9, 1360 NONSTATIC_WORD, // T_INT = 10, 1361 NONSTATIC_DOUBLE, // T_LONG = 11, 1362 NONSTATIC_OOP, // T_OBJECT = 12, 1363 NONSTATIC_OOP, // T_ARRAY = 13, 1364 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1365 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1366 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1367 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1368 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1369 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1370 BAD_ALLOCATION_TYPE, // 0 1371 BAD_ALLOCATION_TYPE, // 1 1372 BAD_ALLOCATION_TYPE, // 2 1373 BAD_ALLOCATION_TYPE, // 3 1374 STATIC_BYTE , // T_BOOLEAN = 4, 1375 STATIC_SHORT, // T_CHAR = 5, 1376 STATIC_WORD, // T_FLOAT = 6, 1377 STATIC_DOUBLE, // T_DOUBLE = 7, 1378 STATIC_BYTE, // T_BYTE = 8, 1379 STATIC_SHORT, // T_SHORT = 9, 1380 STATIC_WORD, // T_INT = 10, 1381 STATIC_DOUBLE, // T_LONG = 11, 1382 STATIC_OOP, // T_OBJECT = 12, 1383 STATIC_OOP, // T_ARRAY = 13, 1384 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1385 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1386 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1387 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1388 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1389 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1390 }; 1391 1392 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1393 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1394 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1395 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1396 return result; 1397 } 1398 1399 class ClassFileParser::FieldAllocationCount : public ResourceObj { 1400 public: 1401 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1402 1403 FieldAllocationCount() { 1404 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1405 count[i] = 0; 1406 } 1407 } 1408 1409 FieldAllocationType update(bool is_static, BasicType type) { 1410 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1411 if (atype != BAD_ALLOCATION_TYPE) { 1412 // Make sure there is no overflow with injected fields. 1413 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1414 count[atype]++; 1415 } 1416 return atype; 1417 } 1418 }; 1419 1420 // Side-effects: populates the _fields, _fields_annotations, 1421 // _fields_type_annotations fields 1422 void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1423 bool is_interface, 1424 FieldAllocationCount* const fac, 1425 ConstantPool* cp, 1426 const int cp_size, 1427 u2* const java_fields_count_ptr, 1428 TRAPS) { 1429 1430 assert(cfs != NULL, "invariant"); 1431 assert(fac != NULL, "invariant"); 1432 assert(cp != NULL, "invariant"); 1433 assert(java_fields_count_ptr != NULL, "invariant"); 1434 1435 assert(NULL == _fields, "invariant"); 1436 assert(NULL == _fields_annotations, "invariant"); 1437 assert(NULL == _fields_type_annotations, "invariant"); 1438 1439 cfs->guarantee_more(2, CHECK); // length 1440 const u2 length = cfs->get_u2_fast(); 1441 *java_fields_count_ptr = length; 1442 1443 int num_injected = 0; 1444 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1445 &num_injected); 1446 const int total_fields = length + num_injected; 1447 1448 // The field array starts with tuples of shorts 1449 // [access, name index, sig index, initial value index, byte offset]. 1450 // A generic signature slot only exists for field with generic 1451 // signature attribute. And the access flag is set with 1452 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1453 // signature slots are at the end of the field array and after all 1454 // other fields data. 1455 // 1456 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1457 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1458 // ... 1459 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1460 // [generic signature index] 1461 // [generic signature index] 1462 // ... 1463 // 1464 // Allocate a temporary resource array for field data. For each field, 1465 // a slot is reserved in the temporary array for the generic signature 1466 // index. After parsing all fields, the data are copied to a permanent 1467 // array and any unused slots will be discarded. 1468 ResourceMark rm(THREAD); 1469 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1470 u2, 1471 total_fields * (FieldInfo::field_slots + 1)); 1472 1473 // The generic signature slots start after all other fields' data. 1474 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1475 int num_generic_signature = 0; 1476 for (int n = 0; n < length; n++) { 1477 // access_flags, name_index, descriptor_index, attributes_count 1478 cfs->guarantee_more(8, CHECK); 1479 1480 AccessFlags access_flags; 1481 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1482 verify_legal_field_modifiers(flags, is_interface, CHECK); 1483 access_flags.set_flags(flags); 1484 1485 const u2 name_index = cfs->get_u2_fast(); 1486 check_property(valid_symbol_at(name_index), 1487 "Invalid constant pool index %u for field name in class file %s", 1488 name_index, CHECK); 1489 const Symbol* const name = cp->symbol_at(name_index); 1490 verify_legal_field_name(name, CHECK); 1491 1492 const u2 signature_index = cfs->get_u2_fast(); 1493 check_property(valid_symbol_at(signature_index), 1494 "Invalid constant pool index %u for field signature in class file %s", 1495 signature_index, CHECK); 1496 const Symbol* const sig = cp->symbol_at(signature_index); 1497 verify_legal_field_signature(name, sig, CHECK); 1498 1499 u2 constantvalue_index = 0; 1500 bool is_synthetic = false; 1501 u2 generic_signature_index = 0; 1502 const bool is_static = access_flags.is_static(); 1503 FieldAnnotationCollector parsed_annotations(_loader_data); 1504 1505 const u2 attributes_count = cfs->get_u2_fast(); 1506 if (attributes_count > 0) { 1507 parse_field_attributes(cfs, 1508 attributes_count, 1509 is_static, 1510 signature_index, 1511 &constantvalue_index, 1512 &is_synthetic, 1513 &generic_signature_index, 1514 &parsed_annotations, 1515 CHECK); 1516 1517 if (parsed_annotations.field_annotations() != NULL) { 1518 if (_fields_annotations == NULL) { 1519 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1520 _loader_data, length, NULL, 1521 CHECK); 1522 } 1523 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1524 parsed_annotations.set_field_annotations(NULL); 1525 } 1526 if (parsed_annotations.field_type_annotations() != NULL) { 1527 if (_fields_type_annotations == NULL) { 1528 _fields_type_annotations = 1529 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1530 length, 1531 NULL, 1532 CHECK); 1533 } 1534 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1535 parsed_annotations.set_field_type_annotations(NULL); 1536 } 1537 1538 if (is_synthetic) { 1539 access_flags.set_is_synthetic(); 1540 } 1541 if (generic_signature_index != 0) { 1542 access_flags.set_field_has_generic_signature(); 1543 fa[generic_signature_slot] = generic_signature_index; 1544 generic_signature_slot ++; 1545 num_generic_signature ++; 1546 } 1547 } 1548 1549 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1550 field->initialize(access_flags.as_short(), 1551 name_index, 1552 signature_index, 1553 constantvalue_index); 1554 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1555 1556 // Remember how many oops we encountered and compute allocation type 1557 const FieldAllocationType atype = fac->update(is_static, type); 1558 field->set_allocation_type(atype); 1559 1560 // After field is initialized with type, we can augment it with aux info 1561 if (parsed_annotations.has_any_annotations()) 1562 parsed_annotations.apply_to(field); 1563 } 1564 1565 int index = length; 1566 if (num_injected != 0) { 1567 for (int n = 0; n < num_injected; n++) { 1568 // Check for duplicates 1569 if (injected[n].may_be_java) { 1570 const Symbol* const name = injected[n].name(); 1571 const Symbol* const signature = injected[n].signature(); 1572 bool duplicate = false; 1573 for (int i = 0; i < length; i++) { 1574 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1575 if (name == cp->symbol_at(f->name_index()) && 1576 signature == cp->symbol_at(f->signature_index())) { 1577 // Symbol is desclared in Java so skip this one 1578 duplicate = true; 1579 break; 1580 } 1581 } 1582 if (duplicate) { 1583 // These will be removed from the field array at the end 1584 continue; 1585 } 1586 } 1587 1588 // Injected field 1589 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1590 field->initialize(JVM_ACC_FIELD_INTERNAL, 1591 injected[n].name_index, 1592 injected[n].signature_index, 1593 0); 1594 1595 const BasicType type = FieldType::basic_type(injected[n].signature()); 1596 1597 // Remember how many oops we encountered and compute allocation type 1598 const FieldAllocationType atype = fac->update(false, type); 1599 field->set_allocation_type(atype); 1600 index++; 1601 } 1602 } 1603 1604 assert(NULL == _fields, "invariant"); 1605 1606 _fields = 1607 MetadataFactory::new_array<u2>(_loader_data, 1608 index * FieldInfo::field_slots + num_generic_signature, 1609 CHECK); 1610 // Sometimes injected fields already exist in the Java source so 1611 // the fields array could be too long. In that case the 1612 // fields array is trimed. Also unused slots that were reserved 1613 // for generic signature indexes are discarded. 1614 { 1615 int i = 0; 1616 for (; i < index * FieldInfo::field_slots; i++) { 1617 _fields->at_put(i, fa[i]); 1618 } 1619 for (int j = total_fields * FieldInfo::field_slots; 1620 j < generic_signature_slot; j++) { 1621 _fields->at_put(i++, fa[j]); 1622 } 1623 assert(_fields->length() == i, ""); 1624 } 1625 1626 if (_need_verify && length > 1) { 1627 // Check duplicated fields 1628 ResourceMark rm(THREAD); 1629 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1630 THREAD, NameSigHash*, HASH_ROW_SIZE); 1631 initialize_hashtable(names_and_sigs); 1632 bool dup = false; 1633 const Symbol* name = NULL; 1634 const Symbol* sig = NULL; 1635 { 1636 debug_only(NoSafepointVerifier nsv;) 1637 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1638 name = fs.name(); 1639 sig = fs.signature(); 1640 // If no duplicates, add name/signature in hashtable names_and_sigs. 1641 if (!put_after_lookup(name, sig, names_and_sigs)) { 1642 dup = true; 1643 break; 1644 } 1645 } 1646 } 1647 if (dup) { 1648 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s", 1649 name->as_C_string(), sig->as_klass_external_name(), CHECK); 1650 } 1651 } 1652 } 1653 1654 1655 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1656 while (length-- > 0) { 1657 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1658 } 1659 } 1660 1661 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1662 u4 code_length, 1663 u4 exception_table_length, 1664 TRAPS) { 1665 assert(cfs != NULL, "invariant"); 1666 1667 const u2* const exception_table_start = cfs->get_u2_buffer(); 1668 assert(exception_table_start != NULL, "null exception table"); 1669 1670 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1671 // end_pc, 1672 // handler_pc, 1673 // catch_type_index 1674 1675 // Will check legal target after parsing code array in verifier. 1676 if (_need_verify) { 1677 for (unsigned int i = 0; i < exception_table_length; i++) { 1678 const u2 start_pc = cfs->get_u2_fast(); 1679 const u2 end_pc = cfs->get_u2_fast(); 1680 const u2 handler_pc = cfs->get_u2_fast(); 1681 const u2 catch_type_index = cfs->get_u2_fast(); 1682 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1683 "Illegal exception table range in class file %s", 1684 CHECK_NULL); 1685 guarantee_property(handler_pc < code_length, 1686 "Illegal exception table handler in class file %s", 1687 CHECK_NULL); 1688 if (catch_type_index != 0) { 1689 guarantee_property(valid_klass_reference_at(catch_type_index), 1690 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1691 } 1692 } 1693 } else { 1694 cfs->skip_u2_fast(exception_table_length * 4); 1695 } 1696 return exception_table_start; 1697 } 1698 1699 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1700 u4 code_length, 1701 CompressedLineNumberWriteStream**const write_stream, 1702 TRAPS) { 1703 1704 const ClassFileStream* const cfs = _stream; 1705 unsigned int num_entries = cfs->get_u2(CHECK); 1706 1707 // Each entry is a u2 start_pc, and a u2 line_number 1708 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1709 1710 // Verify line number attribute and table length 1711 check_property( 1712 code_attribute_length == sizeof(u2) + length_in_bytes, 1713 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1714 1715 cfs->guarantee_more(length_in_bytes, CHECK); 1716 1717 if ((*write_stream) == NULL) { 1718 if (length_in_bytes > fixed_buffer_size) { 1719 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1720 } else { 1721 (*write_stream) = new CompressedLineNumberWriteStream( 1722 _linenumbertable_buffer, fixed_buffer_size); 1723 } 1724 } 1725 1726 while (num_entries-- > 0) { 1727 const u2 bci = cfs->get_u2_fast(); // start_pc 1728 const u2 line = cfs->get_u2_fast(); // line_number 1729 guarantee_property(bci < code_length, 1730 "Invalid pc in LineNumberTable in class file %s", CHECK); 1731 (*write_stream)->write_pair(bci, line); 1732 } 1733 } 1734 1735 1736 class LVT_Hash : public AllStatic { 1737 public: 1738 1739 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1740 /* 1741 * 3-tuple start_bci/length/slot has to be unique key, 1742 * so the following comparison seems to be redundant: 1743 * && elem->name_cp_index == entry->_elem->name_cp_index 1744 */ 1745 return (e0.start_bci == e1.start_bci && 1746 e0.length == e1.length && 1747 e0.name_cp_index == e1.name_cp_index && 1748 e0.slot == e1.slot); 1749 } 1750 1751 static unsigned int hash(LocalVariableTableElement const& e0) { 1752 unsigned int raw_hash = e0.start_bci; 1753 1754 raw_hash = e0.length + raw_hash * 37; 1755 raw_hash = e0.name_cp_index + raw_hash * 37; 1756 raw_hash = e0.slot + raw_hash * 37; 1757 1758 return raw_hash; 1759 } 1760 }; 1761 1762 1763 // Class file LocalVariableTable elements. 1764 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1765 public: 1766 u2 start_bci; 1767 u2 length; 1768 u2 name_cp_index; 1769 u2 descriptor_cp_index; 1770 u2 slot; 1771 }; 1772 1773 static void copy_lvt_element(const Classfile_LVT_Element* const src, 1774 LocalVariableTableElement* const lvt) { 1775 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1776 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1777 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1778 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1779 lvt->signature_cp_index = 0; 1780 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1781 } 1782 1783 // Function is used to parse both attributes: 1784 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1785 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1786 u4 code_length, 1787 u2 max_locals, 1788 u4 code_attribute_length, 1789 u2* const localvariable_table_length, 1790 bool isLVTT, 1791 TRAPS) { 1792 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1793 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1794 const unsigned int size = 1795 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1796 1797 const ConstantPool* const cp = _cp; 1798 1799 // Verify local variable table attribute has right length 1800 if (_need_verify) { 1801 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1802 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1803 } 1804 1805 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1806 assert(localvariable_table_start != NULL, "null local variable table"); 1807 if (!_need_verify) { 1808 cfs->skip_u2_fast(size); 1809 } else { 1810 cfs->guarantee_more(size * 2, CHECK_NULL); 1811 for(int i = 0; i < (*localvariable_table_length); i++) { 1812 const u2 start_pc = cfs->get_u2_fast(); 1813 const u2 length = cfs->get_u2_fast(); 1814 const u2 name_index = cfs->get_u2_fast(); 1815 const u2 descriptor_index = cfs->get_u2_fast(); 1816 const u2 index = cfs->get_u2_fast(); 1817 // Assign to a u4 to avoid overflow 1818 const u4 end_pc = (u4)start_pc + (u4)length; 1819 1820 if (start_pc >= code_length) { 1821 classfile_parse_error( 1822 "Invalid start_pc %u in %s in class file %s", 1823 start_pc, tbl_name, CHECK_NULL); 1824 } 1825 if (end_pc > code_length) { 1826 classfile_parse_error( 1827 "Invalid length %u in %s in class file %s", 1828 length, tbl_name, CHECK_NULL); 1829 } 1830 const int cp_size = cp->length(); 1831 guarantee_property(valid_symbol_at(name_index), 1832 "Name index %u in %s has bad constant type in class file %s", 1833 name_index, tbl_name, CHECK_NULL); 1834 guarantee_property(valid_symbol_at(descriptor_index), 1835 "Signature index %u in %s has bad constant type in class file %s", 1836 descriptor_index, tbl_name, CHECK_NULL); 1837 1838 const Symbol* const name = cp->symbol_at(name_index); 1839 const Symbol* const sig = cp->symbol_at(descriptor_index); 1840 verify_legal_field_name(name, CHECK_NULL); 1841 u2 extra_slot = 0; 1842 if (!isLVTT) { 1843 verify_legal_field_signature(name, sig, CHECK_NULL); 1844 1845 // 4894874: check special cases for double and long local variables 1846 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1847 sig == vmSymbols::type_signature(T_LONG)) { 1848 extra_slot = 1; 1849 } 1850 } 1851 guarantee_property((index + extra_slot) < max_locals, 1852 "Invalid index %u in %s in class file %s", 1853 index, tbl_name, CHECK_NULL); 1854 } 1855 } 1856 return localvariable_table_start; 1857 } 1858 1859 1860 void ClassFileParser::parse_type_array(u2 array_length, 1861 u4 code_length, 1862 u4* const u1_index, 1863 u4* const u2_index, 1864 u1* const u1_array, 1865 u2* const u2_array, 1866 TRAPS) { 1867 const ClassFileStream* const cfs = _stream; 1868 u2 index = 0; // index in the array with long/double occupying two slots 1869 u4 i1 = *u1_index; 1870 u4 i2 = *u2_index + 1; 1871 for(int i = 0; i < array_length; i++) { 1872 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1873 index++; 1874 if (tag == ITEM_Long || tag == ITEM_Double) { 1875 index++; 1876 } else if (tag == ITEM_Object) { 1877 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1878 guarantee_property(valid_klass_reference_at(class_index), 1879 "Bad class index %u in StackMap in class file %s", 1880 class_index, CHECK); 1881 } else if (tag == ITEM_Uninitialized) { 1882 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1883 guarantee_property( 1884 offset < code_length, 1885 "Bad uninitialized type offset %u in StackMap in class file %s", 1886 offset, CHECK); 1887 } else { 1888 guarantee_property( 1889 tag <= (u1)ITEM_Uninitialized, 1890 "Unknown variable type %u in StackMap in class file %s", 1891 tag, CHECK); 1892 } 1893 } 1894 u2_array[*u2_index] = index; 1895 *u1_index = i1; 1896 *u2_index = i2; 1897 } 1898 1899 static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1900 u4 code_attribute_length, 1901 bool need_verify, 1902 TRAPS) { 1903 assert(cfs != NULL, "invariant"); 1904 1905 if (0 == code_attribute_length) { 1906 return NULL; 1907 } 1908 1909 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1910 assert(stackmap_table_start != NULL, "null stackmap table"); 1911 1912 // check code_attribute_length first 1913 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1914 1915 if (!need_verify && !DumpSharedSpaces) { 1916 return NULL; 1917 } 1918 return stackmap_table_start; 1919 } 1920 1921 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1922 u2* const checked_exceptions_length, 1923 u4 method_attribute_length, 1924 TRAPS) { 1925 assert(cfs != NULL, "invariant"); 1926 assert(checked_exceptions_length != NULL, "invariant"); 1927 1928 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1929 *checked_exceptions_length = cfs->get_u2_fast(); 1930 const unsigned int size = 1931 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1932 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1933 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1934 if (!_need_verify) { 1935 cfs->skip_u2_fast(size); 1936 } else { 1937 // Verify each value in the checked exception table 1938 u2 checked_exception; 1939 const u2 len = *checked_exceptions_length; 1940 cfs->guarantee_more(2 * len, CHECK_NULL); 1941 for (int i = 0; i < len; i++) { 1942 checked_exception = cfs->get_u2_fast(); 1943 check_property( 1944 valid_klass_reference_at(checked_exception), 1945 "Exception name has bad type at constant pool %u in class file %s", 1946 checked_exception, CHECK_NULL); 1947 } 1948 } 1949 // check exceptions attribute length 1950 if (_need_verify) { 1951 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1952 sizeof(u2) * size), 1953 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1954 } 1955 return checked_exceptions_start; 1956 } 1957 1958 void ClassFileParser::throwIllegalSignature(const char* type, 1959 const Symbol* name, 1960 const Symbol* sig, 1961 TRAPS) const { 1962 assert(name != NULL, "invariant"); 1963 assert(sig != NULL, "invariant"); 1964 1965 ResourceMark rm(THREAD); 1966 Exceptions::fthrow(THREAD_AND_LOCATION, 1967 vmSymbols::java_lang_ClassFormatError(), 1968 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1969 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1970 } 1971 1972 AnnotationCollector::ID 1973 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 1974 const Symbol* name) { 1975 const vmSymbols::SID sid = vmSymbols::find_sid(name); 1976 // Privileged code can use all annotations. Other code silently drops some. 1977 const bool privileged = loader_data->is_the_null_class_loader_data() || 1978 loader_data->is_platform_class_loader_data() || 1979 loader_data->is_anonymous(); 1980 switch (sid) { 1981 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): { 1982 if (_location != _in_method) break; // only allow for methods 1983 if (!privileged) break; // only allow in privileged code 1984 return _method_CallerSensitive; 1985 } 1986 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 1987 if (_location != _in_method) break; // only allow for methods 1988 if (!privileged) break; // only allow in privileged code 1989 return _method_ForceInline; 1990 } 1991 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 1992 if (_location != _in_method) break; // only allow for methods 1993 if (!privileged) break; // only allow in privileged code 1994 return _method_DontInline; 1995 } 1996 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 1997 if (_location != _in_method) break; // only allow for methods 1998 if (!privileged) break; // only allow in privileged code 1999 return _method_InjectedProfile; 2000 } 2001 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 2002 if (_location != _in_method) break; // only allow for methods 2003 if (!privileged) break; // only allow in privileged code 2004 return _method_LambdaForm_Compiled; 2005 } 2006 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 2007 if (_location != _in_method) break; // only allow for methods 2008 if (!privileged) break; // only allow in privileged code 2009 return _method_LambdaForm_Hidden; 2010 } 2011 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 2012 if (_location != _in_method) break; // only allow for methods 2013 if (!privileged) break; // only allow in privileged code 2014 return _method_HotSpotIntrinsicCandidate; 2015 } 2016 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2017 if (_location != _in_field) break; // only allow for fields 2018 if (!privileged) break; // only allow in privileged code 2019 return _field_Stable; 2020 } 2021 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2022 if (_location != _in_field && _location != _in_class) { 2023 break; // only allow for fields and classes 2024 } 2025 if (!EnableContended || (RestrictContended && !privileged)) { 2026 break; // honor privileges 2027 } 2028 return _jdk_internal_vm_annotation_Contended; 2029 } 2030 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2031 if (_location != _in_method) break; // only allow for methods 2032 if (RestrictReservedStack && !privileged) break; // honor privileges 2033 return _jdk_internal_vm_annotation_ReservedStackAccess; 2034 } 2035 default: { 2036 break; 2037 } 2038 } 2039 return AnnotationCollector::_unknown; 2040 } 2041 2042 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2043 if (is_contended()) 2044 f->set_contended_group(contended_group()); 2045 if (is_stable()) 2046 f->set_stable(true); 2047 } 2048 2049 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2050 // If there's an error deallocate metadata for field annotations 2051 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2052 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2053 } 2054 2055 void MethodAnnotationCollector::apply_to(methodHandle m) { 2056 if (has_annotation(_method_CallerSensitive)) 2057 m->set_caller_sensitive(true); 2058 if (has_annotation(_method_ForceInline)) 2059 m->set_force_inline(true); 2060 if (has_annotation(_method_DontInline)) 2061 m->set_dont_inline(true); 2062 if (has_annotation(_method_InjectedProfile)) 2063 m->set_has_injected_profile(true); 2064 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2065 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2066 if (has_annotation(_method_LambdaForm_Hidden)) 2067 m->set_hidden(true); 2068 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2069 m->set_intrinsic_candidate(true); 2070 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2071 m->set_has_reserved_stack_access(true); 2072 } 2073 2074 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2075 assert(ik != NULL, "invariant"); 2076 ik->set_is_contended(is_contended()); 2077 } 2078 2079 #define MAX_ARGS_SIZE 255 2080 #define MAX_CODE_SIZE 65535 2081 #define INITIAL_MAX_LVT_NUMBER 256 2082 2083 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2084 * 2085 * Rules for LVT's and LVTT's are: 2086 * - There can be any number of LVT's and LVTT's. 2087 * - If there are n LVT's, it is the same as if there was just 2088 * one LVT containing all the entries from the n LVT's. 2089 * - There may be no more than one LVT entry per local variable. 2090 * Two LVT entries are 'equal' if these fields are the same: 2091 * start_pc, length, name, slot 2092 * - There may be no more than one LVTT entry per each LVT entry. 2093 * Each LVTT entry has to match some LVT entry. 2094 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2095 */ 2096 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2097 int lvt_cnt, 2098 u2* const localvariable_table_length, 2099 const u2**const localvariable_table_start, 2100 int lvtt_cnt, 2101 u2* const localvariable_type_table_length, 2102 const u2**const localvariable_type_table_start, 2103 TRAPS) { 2104 2105 ResourceMark rm(THREAD); 2106 2107 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2108 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2109 2110 LVT_HashTable* const table = new LVT_HashTable(); 2111 2112 // To fill LocalVariableTable in 2113 const Classfile_LVT_Element* cf_lvt; 2114 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2115 2116 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2117 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2118 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2119 copy_lvt_element(&cf_lvt[idx], lvt); 2120 // If no duplicates, add LVT elem in hashtable. 2121 if (table->put(*lvt, lvt) == false 2122 && _need_verify 2123 && _major_version >= JAVA_1_5_VERSION) { 2124 classfile_parse_error("Duplicated LocalVariableTable attribute " 2125 "entry for '%s' in class file %s", 2126 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2127 CHECK); 2128 } 2129 } 2130 } 2131 2132 // To merge LocalVariableTable and LocalVariableTypeTable 2133 const Classfile_LVT_Element* cf_lvtt; 2134 LocalVariableTableElement lvtt_elem; 2135 2136 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2137 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2138 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2139 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2140 LocalVariableTableElement** entry = table->get(lvtt_elem); 2141 if (entry == NULL) { 2142 if (_need_verify) { 2143 classfile_parse_error("LVTT entry for '%s' in class file %s " 2144 "does not match any LVT entry", 2145 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2146 CHECK); 2147 } 2148 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2149 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2150 "entry for '%s' in class file %s", 2151 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2152 CHECK); 2153 } else { 2154 // to add generic signatures into LocalVariableTable 2155 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2156 } 2157 } 2158 } 2159 } 2160 2161 2162 void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2163 const u1* runtime_visible_annotations, 2164 int runtime_visible_annotations_length, 2165 const u1* runtime_invisible_annotations, 2166 int runtime_invisible_annotations_length, 2167 const u1* runtime_visible_parameter_annotations, 2168 int runtime_visible_parameter_annotations_length, 2169 const u1* runtime_invisible_parameter_annotations, 2170 int runtime_invisible_parameter_annotations_length, 2171 const u1* runtime_visible_type_annotations, 2172 int runtime_visible_type_annotations_length, 2173 const u1* runtime_invisible_type_annotations, 2174 int runtime_invisible_type_annotations_length, 2175 const u1* annotation_default, 2176 int annotation_default_length, 2177 TRAPS) { 2178 2179 AnnotationArray* a; 2180 2181 if (runtime_visible_annotations_length + 2182 runtime_invisible_annotations_length > 0) { 2183 a = assemble_annotations(runtime_visible_annotations, 2184 runtime_visible_annotations_length, 2185 runtime_invisible_annotations, 2186 runtime_invisible_annotations_length, 2187 CHECK); 2188 cm->set_method_annotations(a); 2189 } 2190 2191 if (runtime_visible_parameter_annotations_length + 2192 runtime_invisible_parameter_annotations_length > 0) { 2193 a = assemble_annotations(runtime_visible_parameter_annotations, 2194 runtime_visible_parameter_annotations_length, 2195 runtime_invisible_parameter_annotations, 2196 runtime_invisible_parameter_annotations_length, 2197 CHECK); 2198 cm->set_parameter_annotations(a); 2199 } 2200 2201 if (annotation_default_length > 0) { 2202 a = assemble_annotations(annotation_default, 2203 annotation_default_length, 2204 NULL, 2205 0, 2206 CHECK); 2207 cm->set_default_annotations(a); 2208 } 2209 2210 if (runtime_visible_type_annotations_length + 2211 runtime_invisible_type_annotations_length > 0) { 2212 a = assemble_annotations(runtime_visible_type_annotations, 2213 runtime_visible_type_annotations_length, 2214 runtime_invisible_type_annotations, 2215 runtime_invisible_type_annotations_length, 2216 CHECK); 2217 cm->set_type_annotations(a); 2218 } 2219 } 2220 2221 2222 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2223 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2224 // Method* to save footprint, so we only know the size of the resulting Method* when the 2225 // entire method attribute is parsed. 2226 // 2227 // The promoted_flags parameter is used to pass relevant access_flags 2228 // from the method back up to the containing klass. These flag values 2229 // are added to klass's access_flags. 2230 2231 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2232 bool is_interface, 2233 const ConstantPool* cp, 2234 AccessFlags* const promoted_flags, 2235 TRAPS) { 2236 assert(cfs != NULL, "invariant"); 2237 assert(cp != NULL, "invariant"); 2238 assert(promoted_flags != NULL, "invariant"); 2239 2240 ResourceMark rm(THREAD); 2241 // Parse fixed parts: 2242 // access_flags, name_index, descriptor_index, attributes_count 2243 cfs->guarantee_more(8, CHECK_NULL); 2244 2245 int flags = cfs->get_u2_fast(); 2246 const u2 name_index = cfs->get_u2_fast(); 2247 const int cp_size = cp->length(); 2248 check_property( 2249 valid_symbol_at(name_index), 2250 "Illegal constant pool index %u for method name in class file %s", 2251 name_index, CHECK_NULL); 2252 const Symbol* const name = cp->symbol_at(name_index); 2253 verify_legal_method_name(name, CHECK_NULL); 2254 2255 const u2 signature_index = cfs->get_u2_fast(); 2256 guarantee_property( 2257 valid_symbol_at(signature_index), 2258 "Illegal constant pool index %u for method signature in class file %s", 2259 signature_index, CHECK_NULL); 2260 const Symbol* const signature = cp->symbol_at(signature_index); 2261 2262 if (name == vmSymbols::class_initializer_name()) { 2263 // We ignore the other access flags for a valid class initializer. 2264 // (JVM Spec 2nd ed., chapter 4.6) 2265 if (_major_version < 51) { // backward compatibility 2266 flags = JVM_ACC_STATIC; 2267 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2268 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2269 } else { 2270 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2271 } 2272 } else { 2273 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2274 } 2275 2276 if (name == vmSymbols::object_initializer_name() && is_interface) { 2277 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2278 } 2279 2280 int args_size = -1; // only used when _need_verify is true 2281 if (_need_verify) { 2282 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2283 verify_legal_method_signature(name, signature, CHECK_NULL); 2284 if (args_size > MAX_ARGS_SIZE) { 2285 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2286 } 2287 } 2288 2289 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2290 2291 // Default values for code and exceptions attribute elements 2292 u2 max_stack = 0; 2293 u2 max_locals = 0; 2294 u4 code_length = 0; 2295 const u1* code_start = 0; 2296 u2 exception_table_length = 0; 2297 const u2* exception_table_start = NULL; 2298 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2299 u2 checked_exceptions_length = 0; 2300 const u2* checked_exceptions_start = NULL; 2301 CompressedLineNumberWriteStream* linenumber_table = NULL; 2302 int linenumber_table_length = 0; 2303 int total_lvt_length = 0; 2304 u2 lvt_cnt = 0; 2305 u2 lvtt_cnt = 0; 2306 bool lvt_allocated = false; 2307 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2308 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2309 u2* localvariable_table_length = NULL; 2310 const u2** localvariable_table_start = NULL; 2311 u2* localvariable_type_table_length = NULL; 2312 const u2** localvariable_type_table_start = NULL; 2313 int method_parameters_length = -1; 2314 const u1* method_parameters_data = NULL; 2315 bool method_parameters_seen = false; 2316 bool parsed_code_attribute = false; 2317 bool parsed_checked_exceptions_attribute = false; 2318 bool parsed_stackmap_attribute = false; 2319 // stackmap attribute - JDK1.5 2320 const u1* stackmap_data = NULL; 2321 int stackmap_data_length = 0; 2322 u2 generic_signature_index = 0; 2323 MethodAnnotationCollector parsed_annotations; 2324 const u1* runtime_visible_annotations = NULL; 2325 int runtime_visible_annotations_length = 0; 2326 const u1* runtime_invisible_annotations = NULL; 2327 int runtime_invisible_annotations_length = 0; 2328 const u1* runtime_visible_parameter_annotations = NULL; 2329 int runtime_visible_parameter_annotations_length = 0; 2330 const u1* runtime_invisible_parameter_annotations = NULL; 2331 int runtime_invisible_parameter_annotations_length = 0; 2332 const u1* runtime_visible_type_annotations = NULL; 2333 int runtime_visible_type_annotations_length = 0; 2334 const u1* runtime_invisible_type_annotations = NULL; 2335 int runtime_invisible_type_annotations_length = 0; 2336 bool runtime_invisible_annotations_exists = false; 2337 bool runtime_invisible_type_annotations_exists = false; 2338 bool runtime_invisible_parameter_annotations_exists = false; 2339 const u1* annotation_default = NULL; 2340 int annotation_default_length = 0; 2341 2342 // Parse code and exceptions attribute 2343 u2 method_attributes_count = cfs->get_u2_fast(); 2344 while (method_attributes_count--) { 2345 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2346 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2347 const u4 method_attribute_length = cfs->get_u4_fast(); 2348 check_property( 2349 valid_symbol_at(method_attribute_name_index), 2350 "Invalid method attribute name index %u in class file %s", 2351 method_attribute_name_index, CHECK_NULL); 2352 2353 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2354 if (method_attribute_name == vmSymbols::tag_code()) { 2355 // Parse Code attribute 2356 if (_need_verify) { 2357 guarantee_property( 2358 !access_flags.is_native() && !access_flags.is_abstract(), 2359 "Code attribute in native or abstract methods in class file %s", 2360 CHECK_NULL); 2361 } 2362 if (parsed_code_attribute) { 2363 classfile_parse_error("Multiple Code attributes in class file %s", 2364 CHECK_NULL); 2365 } 2366 parsed_code_attribute = true; 2367 2368 // Stack size, locals size, and code size 2369 if (_major_version == 45 && _minor_version <= 2) { 2370 cfs->guarantee_more(4, CHECK_NULL); 2371 max_stack = cfs->get_u1_fast(); 2372 max_locals = cfs->get_u1_fast(); 2373 code_length = cfs->get_u2_fast(); 2374 } else { 2375 cfs->guarantee_more(8, CHECK_NULL); 2376 max_stack = cfs->get_u2_fast(); 2377 max_locals = cfs->get_u2_fast(); 2378 code_length = cfs->get_u4_fast(); 2379 } 2380 if (_need_verify) { 2381 guarantee_property(args_size <= max_locals, 2382 "Arguments can't fit into locals in class file %s", 2383 CHECK_NULL); 2384 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2385 "Invalid method Code length %u in class file %s", 2386 code_length, CHECK_NULL); 2387 } 2388 // Code pointer 2389 code_start = cfs->get_u1_buffer(); 2390 assert(code_start != NULL, "null code start"); 2391 cfs->guarantee_more(code_length, CHECK_NULL); 2392 cfs->skip_u1_fast(code_length); 2393 2394 // Exception handler table 2395 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2396 exception_table_length = cfs->get_u2_fast(); 2397 if (exception_table_length > 0) { 2398 exception_table_start = parse_exception_table(cfs, 2399 code_length, 2400 exception_table_length, 2401 CHECK_NULL); 2402 } 2403 2404 // Parse additional attributes in code attribute 2405 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2406 u2 code_attributes_count = cfs->get_u2_fast(); 2407 2408 unsigned int calculated_attribute_length = 0; 2409 2410 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2411 calculated_attribute_length = 2412 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2413 } else { 2414 // max_stack, locals and length are smaller in pre-version 45.2 classes 2415 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2416 } 2417 calculated_attribute_length += 2418 code_length + 2419 sizeof(exception_table_length) + 2420 sizeof(code_attributes_count) + 2421 exception_table_length * 2422 ( sizeof(u2) + // start_pc 2423 sizeof(u2) + // end_pc 2424 sizeof(u2) + // handler_pc 2425 sizeof(u2) ); // catch_type_index 2426 2427 while (code_attributes_count--) { 2428 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2429 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2430 const u4 code_attribute_length = cfs->get_u4_fast(); 2431 calculated_attribute_length += code_attribute_length + 2432 sizeof(code_attribute_name_index) + 2433 sizeof(code_attribute_length); 2434 check_property(valid_symbol_at(code_attribute_name_index), 2435 "Invalid code attribute name index %u in class file %s", 2436 code_attribute_name_index, 2437 CHECK_NULL); 2438 if (LoadLineNumberTables && 2439 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2440 // Parse and compress line number table 2441 parse_linenumber_table(code_attribute_length, 2442 code_length, 2443 &linenumber_table, 2444 CHECK_NULL); 2445 2446 } else if (LoadLocalVariableTables && 2447 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2448 // Parse local variable table 2449 if (!lvt_allocated) { 2450 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2451 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2452 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2453 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2454 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2455 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2456 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2457 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2458 lvt_allocated = true; 2459 } 2460 if (lvt_cnt == max_lvt_cnt) { 2461 max_lvt_cnt <<= 1; 2462 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2463 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2464 } 2465 localvariable_table_start[lvt_cnt] = 2466 parse_localvariable_table(cfs, 2467 code_length, 2468 max_locals, 2469 code_attribute_length, 2470 &localvariable_table_length[lvt_cnt], 2471 false, // is not LVTT 2472 CHECK_NULL); 2473 total_lvt_length += localvariable_table_length[lvt_cnt]; 2474 lvt_cnt++; 2475 } else if (LoadLocalVariableTypeTables && 2476 _major_version >= JAVA_1_5_VERSION && 2477 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2478 if (!lvt_allocated) { 2479 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2480 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2481 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2482 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2483 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2484 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2485 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2486 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2487 lvt_allocated = true; 2488 } 2489 // Parse local variable type table 2490 if (lvtt_cnt == max_lvtt_cnt) { 2491 max_lvtt_cnt <<= 1; 2492 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2493 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2494 } 2495 localvariable_type_table_start[lvtt_cnt] = 2496 parse_localvariable_table(cfs, 2497 code_length, 2498 max_locals, 2499 code_attribute_length, 2500 &localvariable_type_table_length[lvtt_cnt], 2501 true, // is LVTT 2502 CHECK_NULL); 2503 lvtt_cnt++; 2504 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2505 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2506 // Stack map is only needed by the new verifier in JDK1.5. 2507 if (parsed_stackmap_attribute) { 2508 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2509 } 2510 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2511 stackmap_data_length = code_attribute_length; 2512 parsed_stackmap_attribute = true; 2513 } else { 2514 // Skip unknown attributes 2515 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2516 } 2517 } 2518 // check method attribute length 2519 if (_need_verify) { 2520 guarantee_property(method_attribute_length == calculated_attribute_length, 2521 "Code segment has wrong length in class file %s", 2522 CHECK_NULL); 2523 } 2524 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2525 // Parse Exceptions attribute 2526 if (parsed_checked_exceptions_attribute) { 2527 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2528 CHECK_NULL); 2529 } 2530 parsed_checked_exceptions_attribute = true; 2531 checked_exceptions_start = 2532 parse_checked_exceptions(cfs, 2533 &checked_exceptions_length, 2534 method_attribute_length, 2535 CHECK_NULL); 2536 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2537 // reject multiple method parameters 2538 if (method_parameters_seen) { 2539 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2540 CHECK_NULL); 2541 } 2542 method_parameters_seen = true; 2543 method_parameters_length = cfs->get_u1_fast(); 2544 const u2 real_length = (method_parameters_length * 4u) + 1u; 2545 if (method_attribute_length != real_length) { 2546 classfile_parse_error( 2547 "Invalid MethodParameters method attribute length %u in class file", 2548 method_attribute_length, CHECK_NULL); 2549 } 2550 method_parameters_data = cfs->get_u1_buffer(); 2551 cfs->skip_u2_fast(method_parameters_length); 2552 cfs->skip_u2_fast(method_parameters_length); 2553 // ignore this attribute if it cannot be reflected 2554 if (!SystemDictionary::Parameter_klass_loaded()) 2555 method_parameters_length = -1; 2556 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2557 if (method_attribute_length != 0) { 2558 classfile_parse_error( 2559 "Invalid Synthetic method attribute length %u in class file %s", 2560 method_attribute_length, CHECK_NULL); 2561 } 2562 // Should we check that there hasn't already been a synthetic attribute? 2563 access_flags.set_is_synthetic(); 2564 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2565 if (method_attribute_length != 0) { 2566 classfile_parse_error( 2567 "Invalid Deprecated method attribute length %u in class file %s", 2568 method_attribute_length, CHECK_NULL); 2569 } 2570 } else if (_major_version >= JAVA_1_5_VERSION) { 2571 if (method_attribute_name == vmSymbols::tag_signature()) { 2572 if (method_attribute_length != 2) { 2573 classfile_parse_error( 2574 "Invalid Signature attribute length %u in class file %s", 2575 method_attribute_length, CHECK_NULL); 2576 } 2577 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2578 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2579 if (runtime_visible_annotations != NULL) { 2580 classfile_parse_error( 2581 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2582 CHECK_NULL); 2583 } 2584 runtime_visible_annotations_length = method_attribute_length; 2585 runtime_visible_annotations = cfs->get_u1_buffer(); 2586 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2587 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL); 2588 parse_annotations(cp, 2589 runtime_visible_annotations, 2590 runtime_visible_annotations_length, 2591 &parsed_annotations, 2592 _loader_data, 2593 CHECK_NULL); 2594 cfs->skip_u1_fast(runtime_visible_annotations_length); 2595 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2596 if (runtime_invisible_annotations_exists) { 2597 classfile_parse_error( 2598 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2599 CHECK_NULL); 2600 } 2601 runtime_invisible_annotations_exists = true; 2602 if (PreserveAllAnnotations) { 2603 runtime_invisible_annotations_length = method_attribute_length; 2604 runtime_invisible_annotations = cfs->get_u1_buffer(); 2605 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2606 } 2607 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2608 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2609 if (runtime_visible_parameter_annotations != NULL) { 2610 classfile_parse_error( 2611 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2612 CHECK_NULL); 2613 } 2614 runtime_visible_parameter_annotations_length = method_attribute_length; 2615 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2616 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2617 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2618 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2619 if (runtime_invisible_parameter_annotations_exists) { 2620 classfile_parse_error( 2621 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2622 CHECK_NULL); 2623 } 2624 runtime_invisible_parameter_annotations_exists = true; 2625 if (PreserveAllAnnotations) { 2626 runtime_invisible_parameter_annotations_length = method_attribute_length; 2627 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2628 assert(runtime_invisible_parameter_annotations != NULL, 2629 "null invisible parameter annotations"); 2630 } 2631 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2632 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2633 if (annotation_default != NULL) { 2634 classfile_parse_error( 2635 "Multiple AnnotationDefault attributes for method in class file %s", 2636 CHECK_NULL); 2637 } 2638 annotation_default_length = method_attribute_length; 2639 annotation_default = cfs->get_u1_buffer(); 2640 assert(annotation_default != NULL, "null annotation default"); 2641 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2642 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2643 if (runtime_visible_type_annotations != NULL) { 2644 classfile_parse_error( 2645 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2646 CHECK_NULL); 2647 } 2648 runtime_visible_type_annotations_length = method_attribute_length; 2649 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2650 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2651 // No need for the VM to parse Type annotations 2652 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2653 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2654 if (runtime_invisible_type_annotations_exists) { 2655 classfile_parse_error( 2656 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2657 CHECK_NULL); 2658 } else { 2659 runtime_invisible_type_annotations_exists = true; 2660 } 2661 if (PreserveAllAnnotations) { 2662 runtime_invisible_type_annotations_length = method_attribute_length; 2663 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2664 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2665 } 2666 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2667 } else { 2668 // Skip unknown attributes 2669 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2670 } 2671 } else { 2672 // Skip unknown attributes 2673 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2674 } 2675 } 2676 2677 if (linenumber_table != NULL) { 2678 linenumber_table->write_terminator(); 2679 linenumber_table_length = linenumber_table->position(); 2680 } 2681 2682 // Make sure there's at least one Code attribute in non-native/non-abstract method 2683 if (_need_verify) { 2684 guarantee_property(access_flags.is_native() || 2685 access_flags.is_abstract() || 2686 parsed_code_attribute, 2687 "Absent Code attribute in method that is not native or abstract in class file %s", 2688 CHECK_NULL); 2689 } 2690 2691 // All sizing information for a Method* is finally available, now create it 2692 InlineTableSizes sizes( 2693 total_lvt_length, 2694 linenumber_table_length, 2695 exception_table_length, 2696 checked_exceptions_length, 2697 method_parameters_length, 2698 generic_signature_index, 2699 runtime_visible_annotations_length + 2700 runtime_invisible_annotations_length, 2701 runtime_visible_parameter_annotations_length + 2702 runtime_invisible_parameter_annotations_length, 2703 runtime_visible_type_annotations_length + 2704 runtime_invisible_type_annotations_length, 2705 annotation_default_length, 2706 0); 2707 2708 Method* const m = Method::allocate(_loader_data, 2709 code_length, 2710 access_flags, 2711 &sizes, 2712 ConstMethod::NORMAL, 2713 CHECK_NULL); 2714 2715 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2716 2717 // Fill in information from fixed part (access_flags already set) 2718 m->set_constants(_cp); 2719 m->set_name_index(name_index); 2720 m->set_signature_index(signature_index); 2721 2722 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2723 m->constMethod()->set_result_type(rtf.type()); 2724 2725 if (args_size >= 0) { 2726 m->set_size_of_parameters(args_size); 2727 } else { 2728 m->compute_size_of_parameters(THREAD); 2729 } 2730 #ifdef ASSERT 2731 if (args_size >= 0) { 2732 m->compute_size_of_parameters(THREAD); 2733 assert(args_size == m->size_of_parameters(), ""); 2734 } 2735 #endif 2736 2737 // Fill in code attribute information 2738 m->set_max_stack(max_stack); 2739 m->set_max_locals(max_locals); 2740 if (stackmap_data != NULL) { 2741 m->constMethod()->copy_stackmap_data(_loader_data, 2742 (u1*)stackmap_data, 2743 stackmap_data_length, 2744 CHECK_NULL); 2745 } 2746 2747 // Copy byte codes 2748 m->set_code((u1*)code_start); 2749 2750 // Copy line number table 2751 if (linenumber_table != NULL) { 2752 memcpy(m->compressed_linenumber_table(), 2753 linenumber_table->buffer(), 2754 linenumber_table_length); 2755 } 2756 2757 // Copy exception table 2758 if (exception_table_length > 0) { 2759 int size = 2760 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); 2761 copy_u2_with_conversion((u2*) m->exception_table_start(), 2762 exception_table_start, size); 2763 } 2764 2765 // Copy method parameters 2766 if (method_parameters_length > 0) { 2767 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2768 for (int i = 0; i < method_parameters_length; i++) { 2769 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2770 method_parameters_data += 2; 2771 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2772 method_parameters_data += 2; 2773 } 2774 } 2775 2776 // Copy checked exceptions 2777 if (checked_exceptions_length > 0) { 2778 const int size = 2779 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2780 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), 2781 checked_exceptions_start, 2782 size); 2783 } 2784 2785 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2786 if (total_lvt_length > 0) { 2787 promoted_flags->set_has_localvariable_table(); 2788 copy_localvariable_table(m->constMethod(), 2789 lvt_cnt, 2790 localvariable_table_length, 2791 localvariable_table_start, 2792 lvtt_cnt, 2793 localvariable_type_table_length, 2794 localvariable_type_table_start, 2795 CHECK_NULL); 2796 } 2797 2798 if (parsed_annotations.has_any_annotations()) 2799 parsed_annotations.apply_to(m); 2800 2801 // Copy annotations 2802 copy_method_annotations(m->constMethod(), 2803 runtime_visible_annotations, 2804 runtime_visible_annotations_length, 2805 runtime_invisible_annotations, 2806 runtime_invisible_annotations_length, 2807 runtime_visible_parameter_annotations, 2808 runtime_visible_parameter_annotations_length, 2809 runtime_invisible_parameter_annotations, 2810 runtime_invisible_parameter_annotations_length, 2811 runtime_visible_type_annotations, 2812 runtime_visible_type_annotations_length, 2813 runtime_invisible_type_annotations, 2814 runtime_invisible_type_annotations_length, 2815 annotation_default, 2816 annotation_default_length, 2817 CHECK_NULL); 2818 2819 if (name == vmSymbols::finalize_method_name() && 2820 signature == vmSymbols::void_method_signature()) { 2821 if (m->is_empty_method()) { 2822 _has_empty_finalizer = true; 2823 } else { 2824 _has_finalizer = true; 2825 } 2826 } 2827 if (name == vmSymbols::object_initializer_name() && 2828 signature == vmSymbols::void_method_signature() && 2829 m->is_vanilla_constructor()) { 2830 _has_vanilla_constructor = true; 2831 } 2832 2833 NOT_PRODUCT(m->verify()); 2834 return m; 2835 } 2836 2837 2838 // The promoted_flags parameter is used to pass relevant access_flags 2839 // from the methods back up to the containing klass. These flag values 2840 // are added to klass's access_flags. 2841 // Side-effects: populates the _methods field in the parser 2842 void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2843 bool is_interface, 2844 AccessFlags* promoted_flags, 2845 bool* has_final_method, 2846 bool* declares_nonstatic_concrete_methods, 2847 TRAPS) { 2848 assert(cfs != NULL, "invariant"); 2849 assert(promoted_flags != NULL, "invariant"); 2850 assert(has_final_method != NULL, "invariant"); 2851 assert(declares_nonstatic_concrete_methods != NULL, "invariant"); 2852 2853 assert(NULL == _methods, "invariant"); 2854 2855 cfs->guarantee_more(2, CHECK); // length 2856 const u2 length = cfs->get_u2_fast(); 2857 if (length == 0) { 2858 _methods = Universe::the_empty_method_array(); 2859 } else { 2860 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2861 length, 2862 NULL, 2863 CHECK); 2864 2865 for (int index = 0; index < length; index++) { 2866 Method* method = parse_method(cfs, 2867 is_interface, 2868 _cp, 2869 promoted_flags, 2870 CHECK); 2871 2872 if (method->is_final()) { 2873 *has_final_method = true; 2874 } 2875 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags 2876 // used for interface initialization, and default method inheritance analysis 2877 if (is_interface && !(*declares_nonstatic_concrete_methods) 2878 && !method->is_abstract() && !method->is_static()) { 2879 *declares_nonstatic_concrete_methods = true; 2880 } 2881 _methods->at_put(index, method); 2882 } 2883 2884 if (_need_verify && length > 1) { 2885 // Check duplicated methods 2886 ResourceMark rm(THREAD); 2887 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2888 THREAD, NameSigHash*, HASH_ROW_SIZE); 2889 initialize_hashtable(names_and_sigs); 2890 bool dup = false; 2891 const Symbol* name = NULL; 2892 const Symbol* sig = NULL; 2893 { 2894 debug_only(NoSafepointVerifier nsv;) 2895 for (int i = 0; i < length; i++) { 2896 const Method* const m = _methods->at(i); 2897 name = m->name(); 2898 sig = m->signature(); 2899 // If no duplicates, add name/signature in hashtable names_and_sigs. 2900 if (!put_after_lookup(name, sig, names_and_sigs)) { 2901 dup = true; 2902 break; 2903 } 2904 } 2905 } 2906 if (dup) { 2907 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s", 2908 name->as_C_string(), sig->as_klass_external_name(), CHECK); 2909 } 2910 } 2911 } 2912 } 2913 2914 static const intArray* sort_methods(Array<Method*>* methods) { 2915 const int length = methods->length(); 2916 // If JVMTI original method ordering or sharing is enabled we have to 2917 // remember the original class file ordering. 2918 // We temporarily use the vtable_index field in the Method* to store the 2919 // class file index, so we can read in after calling qsort. 2920 // Put the method ordering in the shared archive. 2921 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2922 for (int index = 0; index < length; index++) { 2923 Method* const m = methods->at(index); 2924 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2925 m->set_vtable_index(index); 2926 } 2927 } 2928 // Sort method array by ascending method name (for faster lookups & vtable construction) 2929 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2930 Method::sort_methods(methods); 2931 2932 intArray* method_ordering = NULL; 2933 // If JVMTI original method ordering or sharing is enabled construct int 2934 // array remembering the original ordering 2935 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2936 method_ordering = new intArray(length, length, -1); 2937 for (int index = 0; index < length; index++) { 2938 Method* const m = methods->at(index); 2939 const int old_index = m->vtable_index(); 2940 assert(old_index >= 0 && old_index < length, "invalid method index"); 2941 method_ordering->at_put(index, old_index); 2942 m->set_vtable_index(Method::invalid_vtable_index); 2943 } 2944 } 2945 return method_ordering; 2946 } 2947 2948 // Parse generic_signature attribute for methods and fields 2949 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 2950 TRAPS) { 2951 assert(cfs != NULL, "invariant"); 2952 2953 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 2954 const u2 generic_signature_index = cfs->get_u2_fast(); 2955 check_property( 2956 valid_symbol_at(generic_signature_index), 2957 "Invalid Signature attribute at constant pool index %u in class file %s", 2958 generic_signature_index, CHECK_0); 2959 return generic_signature_index; 2960 } 2961 2962 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 2963 TRAPS) { 2964 2965 assert(cfs != NULL, "invariant"); 2966 2967 cfs->guarantee_more(2, CHECK); // sourcefile_index 2968 const u2 sourcefile_index = cfs->get_u2_fast(); 2969 check_property( 2970 valid_symbol_at(sourcefile_index), 2971 "Invalid SourceFile attribute at constant pool index %u in class file %s", 2972 sourcefile_index, CHECK); 2973 set_class_sourcefile_index(sourcefile_index); 2974 } 2975 2976 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 2977 int length, 2978 TRAPS) { 2979 assert(cfs != NULL, "invariant"); 2980 2981 const u1* const sde_buffer = cfs->get_u1_buffer(); 2982 assert(sde_buffer != NULL, "null sde buffer"); 2983 2984 // Don't bother storing it if there is no way to retrieve it 2985 if (JvmtiExport::can_get_source_debug_extension()) { 2986 assert((length+1) > length, "Overflow checking"); 2987 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 2988 for (int i = 0; i < length; i++) { 2989 sde[i] = sde_buffer[i]; 2990 } 2991 sde[length] = '\0'; 2992 set_class_sde_buffer((const char*)sde, length); 2993 } 2994 // Got utf8 string, set stream position forward 2995 cfs->skip_u1(length, CHECK); 2996 } 2997 2998 2999 // Inner classes can be static, private or protected (classic VM does this) 3000 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 3001 JVM_ACC_PRIVATE | \ 3002 JVM_ACC_PROTECTED | \ 3003 JVM_ACC_STATIC \ 3004 ) 3005 3006 // Return number of classes in the inner classes attribute table 3007 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 3008 const u1* const inner_classes_attribute_start, 3009 bool parsed_enclosingmethod_attribute, 3010 u2 enclosing_method_class_index, 3011 u2 enclosing_method_method_index, 3012 TRAPS) { 3013 const u1* const current_mark = cfs->current(); 3014 u2 length = 0; 3015 if (inner_classes_attribute_start != NULL) { 3016 cfs->set_current(inner_classes_attribute_start); 3017 cfs->guarantee_more(2, CHECK_0); // length 3018 length = cfs->get_u2_fast(); 3019 } 3020 3021 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3022 // method data: 3023 // [inner_class_info_index, 3024 // outer_class_info_index, 3025 // inner_name_index, 3026 // inner_class_access_flags, 3027 // ... 3028 // enclosing_method_class_index, 3029 // enclosing_method_method_index] 3030 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3031 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3032 _inner_classes = inner_classes; 3033 3034 int index = 0; 3035 const int cp_size = _cp->length(); 3036 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3037 for (int n = 0; n < length; n++) { 3038 // Inner class index 3039 const u2 inner_class_info_index = cfs->get_u2_fast(); 3040 check_property( 3041 valid_klass_reference_at(inner_class_info_index), 3042 "inner_class_info_index %u has bad constant type in class file %s", 3043 inner_class_info_index, CHECK_0); 3044 // Outer class index 3045 const u2 outer_class_info_index = cfs->get_u2_fast(); 3046 check_property( 3047 outer_class_info_index == 0 || 3048 valid_klass_reference_at(outer_class_info_index), 3049 "outer_class_info_index %u has bad constant type in class file %s", 3050 outer_class_info_index, CHECK_0); 3051 // Inner class name 3052 const u2 inner_name_index = cfs->get_u2_fast(); 3053 check_property( 3054 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3055 "inner_name_index %u has bad constant type in class file %s", 3056 inner_name_index, CHECK_0); 3057 if (_need_verify) { 3058 guarantee_property(inner_class_info_index != outer_class_info_index, 3059 "Class is both outer and inner class in class file %s", CHECK_0); 3060 } 3061 // Access flags 3062 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3063 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3064 // Set abstract bit for old class files for backward compatibility 3065 flags |= JVM_ACC_ABSTRACT; 3066 } 3067 verify_legal_class_modifiers(flags, CHECK_0); 3068 AccessFlags inner_access_flags(flags); 3069 3070 inner_classes->at_put(index++, inner_class_info_index); 3071 inner_classes->at_put(index++, outer_class_info_index); 3072 inner_classes->at_put(index++, inner_name_index); 3073 inner_classes->at_put(index++, inner_access_flags.as_short()); 3074 } 3075 3076 // 4347400: make sure there's no duplicate entry in the classes array 3077 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3078 for(int i = 0; i < length * 4; i += 4) { 3079 for(int j = i + 4; j < length * 4; j += 4) { 3080 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3081 inner_classes->at(i+1) != inner_classes->at(j+1) || 3082 inner_classes->at(i+2) != inner_classes->at(j+2) || 3083 inner_classes->at(i+3) != inner_classes->at(j+3)), 3084 "Duplicate entry in InnerClasses in class file %s", 3085 CHECK_0); 3086 } 3087 } 3088 } 3089 3090 // Set EnclosingMethod class and method indexes. 3091 if (parsed_enclosingmethod_attribute) { 3092 inner_classes->at_put(index++, enclosing_method_class_index); 3093 inner_classes->at_put(index++, enclosing_method_method_index); 3094 } 3095 assert(index == size, "wrong size"); 3096 3097 // Restore buffer's current position. 3098 cfs->set_current(current_mark); 3099 3100 return length; 3101 } 3102 3103 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3104 set_class_synthetic_flag(true); 3105 } 3106 3107 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3108 assert(cfs != NULL, "invariant"); 3109 3110 const u2 signature_index = cfs->get_u2(CHECK); 3111 check_property( 3112 valid_symbol_at(signature_index), 3113 "Invalid constant pool index %u in Signature attribute in class file %s", 3114 signature_index, CHECK); 3115 set_class_generic_signature_index(signature_index); 3116 } 3117 3118 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3119 ConstantPool* cp, 3120 u4 attribute_byte_length, 3121 TRAPS) { 3122 assert(cfs != NULL, "invariant"); 3123 assert(cp != NULL, "invariant"); 3124 3125 const u1* const current_start = cfs->current(); 3126 3127 guarantee_property(attribute_byte_length >= sizeof(u2), 3128 "Invalid BootstrapMethods attribute length %u in class file %s", 3129 attribute_byte_length, 3130 CHECK); 3131 3132 cfs->guarantee_more(attribute_byte_length, CHECK); 3133 3134 const int attribute_array_length = cfs->get_u2_fast(); 3135 3136 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3137 "Short length on BootstrapMethods in class file %s", 3138 CHECK); 3139 3140 3141 // The attribute contains a counted array of counted tuples of shorts, 3142 // represending bootstrap specifiers: 3143 // length*{bootstrap_method_index, argument_count*{argument_index}} 3144 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3145 // operand_count = number of shorts in attr, except for leading length 3146 3147 // The attribute is copied into a short[] array. 3148 // The array begins with a series of short[2] pairs, one for each tuple. 3149 const int index_size = (attribute_array_length * 2); 3150 3151 Array<u2>* const operands = 3152 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3153 3154 // Eagerly assign operands so they will be deallocated with the constant 3155 // pool if there is an error. 3156 cp->set_operands(operands); 3157 3158 int operand_fill_index = index_size; 3159 const int cp_size = cp->length(); 3160 3161 for (int n = 0; n < attribute_array_length; n++) { 3162 // Store a 32-bit offset into the header of the operand array. 3163 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3164 3165 // Read a bootstrap specifier. 3166 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3167 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3168 const u2 argument_count = cfs->get_u2_fast(); 3169 check_property( 3170 valid_cp_range(bootstrap_method_index, cp_size) && 3171 cp->tag_at(bootstrap_method_index).is_method_handle(), 3172 "bootstrap_method_index %u has bad constant type in class file %s", 3173 bootstrap_method_index, 3174 CHECK); 3175 3176 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3177 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3178 CHECK); 3179 3180 operands->at_put(operand_fill_index++, bootstrap_method_index); 3181 operands->at_put(operand_fill_index++, argument_count); 3182 3183 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3184 for (int j = 0; j < argument_count; j++) { 3185 const u2 argument_index = cfs->get_u2_fast(); 3186 check_property( 3187 valid_cp_range(argument_index, cp_size) && 3188 cp->tag_at(argument_index).is_loadable_constant(), 3189 "argument_index %u has bad constant type in class file %s", 3190 argument_index, 3191 CHECK); 3192 operands->at_put(operand_fill_index++, argument_index); 3193 } 3194 } 3195 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3196 "Bad length on BootstrapMethods in class file %s", 3197 CHECK); 3198 } 3199 3200 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3201 ConstantPool* cp, 3202 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3203 TRAPS) { 3204 assert(cfs != NULL, "invariant"); 3205 assert(cp != NULL, "invariant"); 3206 assert(parsed_annotations != NULL, "invariant"); 3207 3208 // Set inner classes attribute to default sentinel 3209 _inner_classes = Universe::the_empty_short_array(); 3210 cfs->guarantee_more(2, CHECK); // attributes_count 3211 u2 attributes_count = cfs->get_u2_fast(); 3212 bool parsed_sourcefile_attribute = false; 3213 bool parsed_innerclasses_attribute = false; 3214 bool parsed_enclosingmethod_attribute = false; 3215 bool parsed_bootstrap_methods_attribute = false; 3216 const u1* runtime_visible_annotations = NULL; 3217 int runtime_visible_annotations_length = 0; 3218 const u1* runtime_invisible_annotations = NULL; 3219 int runtime_invisible_annotations_length = 0; 3220 const u1* runtime_visible_type_annotations = NULL; 3221 int runtime_visible_type_annotations_length = 0; 3222 const u1* runtime_invisible_type_annotations = NULL; 3223 int runtime_invisible_type_annotations_length = 0; 3224 bool runtime_invisible_type_annotations_exists = false; 3225 bool runtime_invisible_annotations_exists = false; 3226 bool parsed_source_debug_ext_annotations_exist = false; 3227 const u1* inner_classes_attribute_start = NULL; 3228 u4 inner_classes_attribute_length = 0; 3229 u2 enclosing_method_class_index = 0; 3230 u2 enclosing_method_method_index = 0; 3231 // Iterate over attributes 3232 while (attributes_count--) { 3233 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3234 const u2 attribute_name_index = cfs->get_u2_fast(); 3235 const u4 attribute_length = cfs->get_u4_fast(); 3236 check_property( 3237 valid_symbol_at(attribute_name_index), 3238 "Attribute name has bad constant pool index %u in class file %s", 3239 attribute_name_index, CHECK); 3240 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3241 if (tag == vmSymbols::tag_source_file()) { 3242 // Check for SourceFile tag 3243 if (_need_verify) { 3244 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3245 } 3246 if (parsed_sourcefile_attribute) { 3247 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3248 } else { 3249 parsed_sourcefile_attribute = true; 3250 } 3251 parse_classfile_sourcefile_attribute(cfs, CHECK); 3252 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3253 // Check for SourceDebugExtension tag 3254 if (parsed_source_debug_ext_annotations_exist) { 3255 classfile_parse_error( 3256 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3257 } 3258 parsed_source_debug_ext_annotations_exist = true; 3259 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3260 } else if (tag == vmSymbols::tag_inner_classes()) { 3261 // Check for InnerClasses tag 3262 if (parsed_innerclasses_attribute) { 3263 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3264 } else { 3265 parsed_innerclasses_attribute = true; 3266 } 3267 inner_classes_attribute_start = cfs->get_u1_buffer(); 3268 inner_classes_attribute_length = attribute_length; 3269 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3270 } else if (tag == vmSymbols::tag_synthetic()) { 3271 // Check for Synthetic tag 3272 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3273 if (attribute_length != 0) { 3274 classfile_parse_error( 3275 "Invalid Synthetic classfile attribute length %u in class file %s", 3276 attribute_length, CHECK); 3277 } 3278 parse_classfile_synthetic_attribute(CHECK); 3279 } else if (tag == vmSymbols::tag_deprecated()) { 3280 // Check for Deprecatd tag - 4276120 3281 if (attribute_length != 0) { 3282 classfile_parse_error( 3283 "Invalid Deprecated classfile attribute length %u in class file %s", 3284 attribute_length, CHECK); 3285 } 3286 } else if (_major_version >= JAVA_1_5_VERSION) { 3287 if (tag == vmSymbols::tag_signature()) { 3288 if (attribute_length != 2) { 3289 classfile_parse_error( 3290 "Wrong Signature attribute length %u in class file %s", 3291 attribute_length, CHECK); 3292 } 3293 parse_classfile_signature_attribute(cfs, CHECK); 3294 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3295 if (runtime_visible_annotations != NULL) { 3296 classfile_parse_error( 3297 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3298 } 3299 runtime_visible_annotations_length = attribute_length; 3300 runtime_visible_annotations = cfs->get_u1_buffer(); 3301 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3302 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 3303 parse_annotations(cp, 3304 runtime_visible_annotations, 3305 runtime_visible_annotations_length, 3306 parsed_annotations, 3307 _loader_data, 3308 CHECK); 3309 cfs->skip_u1_fast(runtime_visible_annotations_length); 3310 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3311 if (runtime_invisible_annotations_exists) { 3312 classfile_parse_error( 3313 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3314 } 3315 runtime_invisible_annotations_exists = true; 3316 if (PreserveAllAnnotations) { 3317 runtime_invisible_annotations_length = attribute_length; 3318 runtime_invisible_annotations = cfs->get_u1_buffer(); 3319 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3320 } 3321 cfs->skip_u1(attribute_length, CHECK); 3322 } else if (tag == vmSymbols::tag_enclosing_method()) { 3323 if (parsed_enclosingmethod_attribute) { 3324 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3325 } else { 3326 parsed_enclosingmethod_attribute = true; 3327 } 3328 guarantee_property(attribute_length == 4, 3329 "Wrong EnclosingMethod attribute length %u in class file %s", 3330 attribute_length, CHECK); 3331 cfs->guarantee_more(4, CHECK); // class_index, method_index 3332 enclosing_method_class_index = cfs->get_u2_fast(); 3333 enclosing_method_method_index = cfs->get_u2_fast(); 3334 if (enclosing_method_class_index == 0) { 3335 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3336 } 3337 // Validate the constant pool indices and types 3338 check_property(valid_klass_reference_at(enclosing_method_class_index), 3339 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3340 if (enclosing_method_method_index != 0 && 3341 (!cp->is_within_bounds(enclosing_method_method_index) || 3342 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3343 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3344 } 3345 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3346 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3347 if (parsed_bootstrap_methods_attribute) { 3348 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3349 } 3350 parsed_bootstrap_methods_attribute = true; 3351 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3352 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3353 if (runtime_visible_type_annotations != NULL) { 3354 classfile_parse_error( 3355 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3356 } 3357 runtime_visible_type_annotations_length = attribute_length; 3358 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3359 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3360 // No need for the VM to parse Type annotations 3361 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3362 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3363 if (runtime_invisible_type_annotations_exists) { 3364 classfile_parse_error( 3365 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3366 } else { 3367 runtime_invisible_type_annotations_exists = true; 3368 } 3369 if (PreserveAllAnnotations) { 3370 runtime_invisible_type_annotations_length = attribute_length; 3371 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3372 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3373 } 3374 cfs->skip_u1(attribute_length, CHECK); 3375 } else { 3376 // Unknown attribute 3377 cfs->skip_u1(attribute_length, CHECK); 3378 } 3379 } else { 3380 // Unknown attribute 3381 cfs->skip_u1(attribute_length, CHECK); 3382 } 3383 } 3384 _annotations = assemble_annotations(runtime_visible_annotations, 3385 runtime_visible_annotations_length, 3386 runtime_invisible_annotations, 3387 runtime_invisible_annotations_length, 3388 CHECK); 3389 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3390 runtime_visible_type_annotations_length, 3391 runtime_invisible_type_annotations, 3392 runtime_invisible_type_annotations_length, 3393 CHECK); 3394 3395 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3396 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3397 cfs, 3398 inner_classes_attribute_start, 3399 parsed_innerclasses_attribute, 3400 enclosing_method_class_index, 3401 enclosing_method_method_index, 3402 CHECK); 3403 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3404 guarantee_property( 3405 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3406 "Wrong InnerClasses attribute length in class file %s", CHECK); 3407 } 3408 } 3409 3410 if (_max_bootstrap_specifier_index >= 0) { 3411 guarantee_property(parsed_bootstrap_methods_attribute, 3412 "Missing BootstrapMethods attribute in class file %s", CHECK); 3413 } 3414 } 3415 3416 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3417 assert(k != NULL, "invariant"); 3418 3419 if (_synthetic_flag) 3420 k->set_is_synthetic(); 3421 if (_sourcefile_index != 0) { 3422 k->set_source_file_name_index(_sourcefile_index); 3423 } 3424 if (_generic_signature_index != 0) { 3425 k->set_generic_signature_index(_generic_signature_index); 3426 } 3427 if (_sde_buffer != NULL) { 3428 k->set_source_debug_extension(_sde_buffer, _sde_length); 3429 } 3430 } 3431 3432 // Create the Annotations object that will 3433 // hold the annotations array for the Klass. 3434 void ClassFileParser::create_combined_annotations(TRAPS) { 3435 if (_annotations == NULL && 3436 _type_annotations == NULL && 3437 _fields_annotations == NULL && 3438 _fields_type_annotations == NULL) { 3439 // Don't create the Annotations object unnecessarily. 3440 return; 3441 } 3442 3443 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3444 annotations->set_class_annotations(_annotations); 3445 annotations->set_class_type_annotations(_type_annotations); 3446 annotations->set_fields_annotations(_fields_annotations); 3447 annotations->set_fields_type_annotations(_fields_type_annotations); 3448 3449 // This is the Annotations object that will be 3450 // assigned to InstanceKlass being constructed. 3451 _combined_annotations = annotations; 3452 3453 // The annotations arrays below has been transfered the 3454 // _combined_annotations so these fields can now be cleared. 3455 _annotations = NULL; 3456 _type_annotations = NULL; 3457 _fields_annotations = NULL; 3458 _fields_type_annotations = NULL; 3459 } 3460 3461 // Transfer ownership of metadata allocated to the InstanceKlass. 3462 void ClassFileParser::apply_parsed_class_metadata( 3463 InstanceKlass* this_klass, 3464 int java_fields_count, TRAPS) { 3465 assert(this_klass != NULL, "invariant"); 3466 3467 _cp->set_pool_holder(this_klass); 3468 this_klass->set_constants(_cp); 3469 this_klass->set_fields(_fields, java_fields_count); 3470 this_klass->set_methods(_methods); 3471 this_klass->set_inner_classes(_inner_classes); 3472 this_klass->set_local_interfaces(_local_interfaces); 3473 this_klass->set_transitive_interfaces(_transitive_interfaces); 3474 this_klass->set_annotations(_combined_annotations); 3475 3476 // Clear out these fields so they don't get deallocated by the destructor 3477 clear_class_metadata(); 3478 } 3479 3480 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3481 int runtime_visible_annotations_length, 3482 const u1* const runtime_invisible_annotations, 3483 int runtime_invisible_annotations_length, 3484 TRAPS) { 3485 AnnotationArray* annotations = NULL; 3486 if (runtime_visible_annotations != NULL || 3487 runtime_invisible_annotations != NULL) { 3488 annotations = MetadataFactory::new_array<u1>(_loader_data, 3489 runtime_visible_annotations_length + 3490 runtime_invisible_annotations_length, 3491 CHECK_(annotations)); 3492 if (runtime_visible_annotations != NULL) { 3493 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3494 annotations->at_put(i, runtime_visible_annotations[i]); 3495 } 3496 } 3497 if (runtime_invisible_annotations != NULL) { 3498 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3499 int append = runtime_visible_annotations_length+i; 3500 annotations->at_put(append, runtime_invisible_annotations[i]); 3501 } 3502 } 3503 } 3504 return annotations; 3505 } 3506 3507 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3508 const int super_class_index, 3509 const bool need_verify, 3510 TRAPS) { 3511 assert(cp != NULL, "invariant"); 3512 const InstanceKlass* super_klass = NULL; 3513 3514 if (super_class_index == 0) { 3515 check_property(_class_name == vmSymbols::java_lang_Object(), 3516 "Invalid superclass index %u in class file %s", 3517 super_class_index, 3518 CHECK_NULL); 3519 } else { 3520 check_property(valid_klass_reference_at(super_class_index), 3521 "Invalid superclass index %u in class file %s", 3522 super_class_index, 3523 CHECK_NULL); 3524 // The class name should be legal because it is checked when parsing constant pool. 3525 // However, make sure it is not an array type. 3526 bool is_array = false; 3527 if (cp->tag_at(super_class_index).is_klass()) { 3528 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3529 if (need_verify) 3530 is_array = super_klass->is_array_klass(); 3531 } else if (need_verify) { 3532 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3533 } 3534 if (need_verify) { 3535 guarantee_property(!is_array, 3536 "Bad superclass name in class file %s", CHECK_NULL); 3537 } 3538 } 3539 return super_klass; 3540 } 3541 3542 static unsigned int compute_oop_map_count(const InstanceKlass* super, 3543 unsigned int nonstatic_oop_map_count, 3544 int first_nonstatic_oop_offset) { 3545 3546 unsigned int map_count = 3547 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3548 if (nonstatic_oop_map_count > 0) { 3549 // We have oops to add to map 3550 if (map_count == 0) { 3551 map_count = nonstatic_oop_map_count; 3552 } 3553 else { 3554 // Check whether we should add a new map block or whether the last one can 3555 // be extended 3556 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3557 const OopMapBlock* const last_map = first_map + map_count - 1; 3558 3559 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3560 if (next_offset == first_nonstatic_oop_offset) { 3561 // There is no gap bettwen superklass's last oop field and first 3562 // local oop field, merge maps. 3563 nonstatic_oop_map_count -= 1; 3564 } 3565 else { 3566 // Superklass didn't end with a oop field, add extra maps 3567 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3568 } 3569 map_count += nonstatic_oop_map_count; 3570 } 3571 } 3572 return map_count; 3573 } 3574 3575 #ifndef PRODUCT 3576 static void print_field_layout(const Symbol* name, 3577 Array<u2>* fields, 3578 constantPoolHandle cp, 3579 int instance_size, 3580 int instance_fields_start, 3581 int instance_fields_end, 3582 int static_fields_end) { 3583 3584 assert(name != NULL, "invariant"); 3585 3586 tty->print("%s: field layout\n", name->as_klass_external_name()); 3587 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3588 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3589 if (!fs.access_flags().is_static()) { 3590 tty->print(" @%3d \"%s\" %s\n", 3591 fs.offset(), 3592 fs.name()->as_klass_external_name(), 3593 fs.signature()->as_klass_external_name()); 3594 } 3595 } 3596 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3597 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3598 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3599 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3600 if (fs.access_flags().is_static()) { 3601 tty->print(" @%3d \"%s\" %s\n", 3602 fs.offset(), 3603 fs.name()->as_klass_external_name(), 3604 fs.signature()->as_klass_external_name()); 3605 } 3606 } 3607 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3608 tty->print("\n"); 3609 } 3610 #endif 3611 3612 // Values needed for oopmap and InstanceKlass creation 3613 class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3614 public: 3615 int* nonstatic_oop_offsets; 3616 unsigned int* nonstatic_oop_counts; 3617 unsigned int nonstatic_oop_map_count; 3618 unsigned int total_oop_map_count; 3619 int instance_size; 3620 int nonstatic_field_size; 3621 int static_field_size; 3622 bool has_nonstatic_fields; 3623 }; 3624 3625 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3626 void ClassFileParser::layout_fields(ConstantPool* cp, 3627 const FieldAllocationCount* fac, 3628 const ClassAnnotationCollector* parsed_annotations, 3629 FieldLayoutInfo* info, 3630 TRAPS) { 3631 3632 assert(cp != NULL, "invariant"); 3633 3634 // Field size and offset computation 3635 int nonstatic_field_size = _super_klass == NULL ? 0 : 3636 _super_klass->nonstatic_field_size(); 3637 3638 // Count the contended fields by type. 3639 // 3640 // We ignore static fields, because @Contended is not supported for them. 3641 // The layout code below will also ignore the static fields. 3642 int nonstatic_contended_count = 0; 3643 FieldAllocationCount fac_contended; 3644 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3645 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3646 if (fs.is_contended()) { 3647 fac_contended.count[atype]++; 3648 if (!fs.access_flags().is_static()) { 3649 nonstatic_contended_count++; 3650 } 3651 } 3652 } 3653 3654 3655 // Calculate the starting byte offsets 3656 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3657 int next_static_double_offset = next_static_oop_offset + 3658 ((fac->count[STATIC_OOP]) * heapOopSize); 3659 if ( fac->count[STATIC_DOUBLE] && 3660 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3661 Universe::field_type_should_be_aligned(T_LONG)) ) { 3662 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3663 } 3664 3665 int next_static_word_offset = next_static_double_offset + 3666 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3667 int next_static_short_offset = next_static_word_offset + 3668 ((fac->count[STATIC_WORD]) * BytesPerInt); 3669 int next_static_byte_offset = next_static_short_offset + 3670 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3671 3672 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3673 nonstatic_field_size * heapOopSize; 3674 3675 int next_nonstatic_field_offset = nonstatic_fields_start; 3676 3677 const bool is_contended_class = parsed_annotations->is_contended(); 3678 3679 // Class is contended, pad before all the fields 3680 if (is_contended_class) { 3681 next_nonstatic_field_offset += ContendedPaddingWidth; 3682 } 3683 3684 // Compute the non-contended fields count. 3685 // The packing code below relies on these counts to determine if some field 3686 // can be squeezed into the alignment gap. Contended fields are obviously 3687 // exempt from that. 3688 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3689 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3690 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3691 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3692 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3693 3694 // Total non-static fields count, including every contended field 3695 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3696 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3697 fac->count[NONSTATIC_OOP]; 3698 3699 const bool super_has_nonstatic_fields = 3700 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3701 const bool has_nonstatic_fields = 3702 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3703 3704 3705 // Prepare list of oops for oop map generation. 3706 // 3707 // "offset" and "count" lists are describing the set of contiguous oop 3708 // regions. offset[i] is the start of the i-th region, which then has 3709 // count[i] oops following. Before we know how many regions are required, 3710 // we pessimistically allocate the maps to fit all the oops into the 3711 // distinct regions. 3712 // 3713 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3714 // to figure out if we still need to do this. 3715 unsigned int nonstatic_oop_map_count = 0; 3716 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3717 3718 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3719 THREAD, int, max_nonstatic_oop_maps); 3720 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3721 THREAD, unsigned int, max_nonstatic_oop_maps); 3722 3723 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3724 3725 bool compact_fields = CompactFields; 3726 int allocation_style = FieldsAllocationStyle; 3727 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3728 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3729 allocation_style = 1; // Optimistic 3730 } 3731 3732 // The next classes have predefined hard-coded fields offsets 3733 // (see in JavaClasses::compute_hard_coded_offsets()). 3734 // Use default fields allocation order for them. 3735 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3736 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3737 _class_name == vmSymbols::java_lang_Class() || 3738 _class_name == vmSymbols::java_lang_ClassLoader() || 3739 _class_name == vmSymbols::java_lang_ref_Reference() || 3740 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3741 _class_name == vmSymbols::java_lang_StackTraceElement() || 3742 _class_name == vmSymbols::java_lang_String() || 3743 _class_name == vmSymbols::java_lang_Throwable() || 3744 _class_name == vmSymbols::java_lang_Boolean() || 3745 _class_name == vmSymbols::java_lang_Character() || 3746 _class_name == vmSymbols::java_lang_Float() || 3747 _class_name == vmSymbols::java_lang_Double() || 3748 _class_name == vmSymbols::java_lang_Byte() || 3749 _class_name == vmSymbols::java_lang_Short() || 3750 _class_name == vmSymbols::java_lang_Integer() || 3751 _class_name == vmSymbols::java_lang_Long())) { 3752 allocation_style = 0; // Allocate oops first 3753 compact_fields = false; // Don't compact fields 3754 } 3755 3756 int next_nonstatic_oop_offset = 0; 3757 int next_nonstatic_double_offset = 0; 3758 3759 // Rearrange fields for a given allocation style 3760 if( allocation_style == 0 ) { 3761 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3762 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3763 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3764 (nonstatic_oop_count * heapOopSize); 3765 } else if( allocation_style == 1 ) { 3766 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3767 next_nonstatic_double_offset = next_nonstatic_field_offset; 3768 } else if( allocation_style == 2 ) { 3769 // Fields allocation: oops fields in super and sub classes are together. 3770 if( nonstatic_field_size > 0 && _super_klass != NULL && 3771 _super_klass->nonstatic_oop_map_size() > 0 ) { 3772 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3773 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3774 const OopMapBlock* const last_map = first_map + map_count - 1; 3775 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3776 if (next_offset == next_nonstatic_field_offset) { 3777 allocation_style = 0; // allocate oops first 3778 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3779 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3780 (nonstatic_oop_count * heapOopSize); 3781 } 3782 } 3783 if( allocation_style == 2 ) { 3784 allocation_style = 1; // allocate oops last 3785 next_nonstatic_double_offset = next_nonstatic_field_offset; 3786 } 3787 } else { 3788 ShouldNotReachHere(); 3789 } 3790 3791 int nonstatic_oop_space_count = 0; 3792 int nonstatic_word_space_count = 0; 3793 int nonstatic_short_space_count = 0; 3794 int nonstatic_byte_space_count = 0; 3795 int nonstatic_oop_space_offset = 0; 3796 int nonstatic_word_space_offset = 0; 3797 int nonstatic_short_space_offset = 0; 3798 int nonstatic_byte_space_offset = 0; 3799 3800 // Try to squeeze some of the fields into the gaps due to 3801 // long/double alignment. 3802 if (nonstatic_double_count > 0) { 3803 int offset = next_nonstatic_double_offset; 3804 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3805 if (compact_fields && offset != next_nonstatic_double_offset) { 3806 // Allocate available fields into the gap before double field. 3807 int length = next_nonstatic_double_offset - offset; 3808 assert(length == BytesPerInt, ""); 3809 nonstatic_word_space_offset = offset; 3810 if (nonstatic_word_count > 0) { 3811 nonstatic_word_count -= 1; 3812 nonstatic_word_space_count = 1; // Only one will fit 3813 length -= BytesPerInt; 3814 offset += BytesPerInt; 3815 } 3816 nonstatic_short_space_offset = offset; 3817 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3818 nonstatic_short_count -= 1; 3819 nonstatic_short_space_count += 1; 3820 length -= BytesPerShort; 3821 offset += BytesPerShort; 3822 } 3823 nonstatic_byte_space_offset = offset; 3824 while (length > 0 && nonstatic_byte_count > 0) { 3825 nonstatic_byte_count -= 1; 3826 nonstatic_byte_space_count += 1; 3827 length -= 1; 3828 } 3829 // Allocate oop field in the gap if there are no other fields for that. 3830 nonstatic_oop_space_offset = offset; 3831 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3832 allocation_style != 0) { // when oop fields not first 3833 nonstatic_oop_count -= 1; 3834 nonstatic_oop_space_count = 1; // Only one will fit 3835 length -= heapOopSize; 3836 offset += heapOopSize; 3837 } 3838 } 3839 } 3840 3841 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3842 (nonstatic_double_count * BytesPerLong); 3843 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3844 (nonstatic_word_count * BytesPerInt); 3845 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3846 (nonstatic_short_count * BytesPerShort); 3847 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3848 nonstatic_byte_count; 3849 3850 // let oops jump before padding with this allocation style 3851 if( allocation_style == 1 ) { 3852 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3853 if( nonstatic_oop_count > 0 ) { 3854 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3855 } 3856 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3857 } 3858 3859 // Iterate over fields again and compute correct offsets. 3860 // The field allocation type was temporarily stored in the offset slot. 3861 // oop fields are located before non-oop fields (static and non-static). 3862 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3863 3864 // skip already laid out fields 3865 if (fs.is_offset_set()) continue; 3866 3867 // contended instance fields are handled below 3868 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3869 3870 int real_offset = 0; 3871 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3872 3873 // pack the rest of the fields 3874 switch (atype) { 3875 case STATIC_OOP: 3876 real_offset = next_static_oop_offset; 3877 next_static_oop_offset += heapOopSize; 3878 break; 3879 case STATIC_BYTE: 3880 real_offset = next_static_byte_offset; 3881 next_static_byte_offset += 1; 3882 break; 3883 case STATIC_SHORT: 3884 real_offset = next_static_short_offset; 3885 next_static_short_offset += BytesPerShort; 3886 break; 3887 case STATIC_WORD: 3888 real_offset = next_static_word_offset; 3889 next_static_word_offset += BytesPerInt; 3890 break; 3891 case STATIC_DOUBLE: 3892 real_offset = next_static_double_offset; 3893 next_static_double_offset += BytesPerLong; 3894 break; 3895 case NONSTATIC_OOP: 3896 if( nonstatic_oop_space_count > 0 ) { 3897 real_offset = nonstatic_oop_space_offset; 3898 nonstatic_oop_space_offset += heapOopSize; 3899 nonstatic_oop_space_count -= 1; 3900 } else { 3901 real_offset = next_nonstatic_oop_offset; 3902 next_nonstatic_oop_offset += heapOopSize; 3903 } 3904 3905 // Record this oop in the oop maps 3906 if( nonstatic_oop_map_count > 0 && 3907 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3908 real_offset - 3909 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3910 heapOopSize ) { 3911 // This oop is adjacent to the previous one, add to current oop map 3912 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3913 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3914 } else { 3915 // This oop is not adjacent to the previous one, create new oop map 3916 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3917 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3918 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3919 nonstatic_oop_map_count += 1; 3920 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3921 first_nonstatic_oop_offset = real_offset; 3922 } 3923 } 3924 break; 3925 case NONSTATIC_BYTE: 3926 if( nonstatic_byte_space_count > 0 ) { 3927 real_offset = nonstatic_byte_space_offset; 3928 nonstatic_byte_space_offset += 1; 3929 nonstatic_byte_space_count -= 1; 3930 } else { 3931 real_offset = next_nonstatic_byte_offset; 3932 next_nonstatic_byte_offset += 1; 3933 } 3934 break; 3935 case NONSTATIC_SHORT: 3936 if( nonstatic_short_space_count > 0 ) { 3937 real_offset = nonstatic_short_space_offset; 3938 nonstatic_short_space_offset += BytesPerShort; 3939 nonstatic_short_space_count -= 1; 3940 } else { 3941 real_offset = next_nonstatic_short_offset; 3942 next_nonstatic_short_offset += BytesPerShort; 3943 } 3944 break; 3945 case NONSTATIC_WORD: 3946 if( nonstatic_word_space_count > 0 ) { 3947 real_offset = nonstatic_word_space_offset; 3948 nonstatic_word_space_offset += BytesPerInt; 3949 nonstatic_word_space_count -= 1; 3950 } else { 3951 real_offset = next_nonstatic_word_offset; 3952 next_nonstatic_word_offset += BytesPerInt; 3953 } 3954 break; 3955 case NONSTATIC_DOUBLE: 3956 real_offset = next_nonstatic_double_offset; 3957 next_nonstatic_double_offset += BytesPerLong; 3958 break; 3959 default: 3960 ShouldNotReachHere(); 3961 } 3962 fs.set_offset(real_offset); 3963 } 3964 3965 3966 // Handle the contended cases. 3967 // 3968 // Each contended field should not intersect the cache line with another contended field. 3969 // In the absence of alignment information, we end up with pessimistically separating 3970 // the fields with full-width padding. 3971 // 3972 // Additionally, this should not break alignment for the fields, so we round the alignment up 3973 // for each field. 3974 if (nonstatic_contended_count > 0) { 3975 3976 // if there is at least one contended field, we need to have pre-padding for them 3977 next_nonstatic_padded_offset += ContendedPaddingWidth; 3978 3979 // collect all contended groups 3980 ResourceBitMap bm(cp->size()); 3981 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3982 // skip already laid out fields 3983 if (fs.is_offset_set()) continue; 3984 3985 if (fs.is_contended()) { 3986 bm.set_bit(fs.contended_group()); 3987 } 3988 } 3989 3990 int current_group = -1; 3991 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 3992 3993 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3994 3995 // skip already laid out fields 3996 if (fs.is_offset_set()) continue; 3997 3998 // skip non-contended fields and fields from different group 3999 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 4000 4001 // handle statics below 4002 if (fs.access_flags().is_static()) continue; 4003 4004 int real_offset = 0; 4005 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 4006 4007 switch (atype) { 4008 case NONSTATIC_BYTE: 4009 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 4010 real_offset = next_nonstatic_padded_offset; 4011 next_nonstatic_padded_offset += 1; 4012 break; 4013 4014 case NONSTATIC_SHORT: 4015 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4016 real_offset = next_nonstatic_padded_offset; 4017 next_nonstatic_padded_offset += BytesPerShort; 4018 break; 4019 4020 case NONSTATIC_WORD: 4021 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4022 real_offset = next_nonstatic_padded_offset; 4023 next_nonstatic_padded_offset += BytesPerInt; 4024 break; 4025 4026 case NONSTATIC_DOUBLE: 4027 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4028 real_offset = next_nonstatic_padded_offset; 4029 next_nonstatic_padded_offset += BytesPerLong; 4030 break; 4031 4032 case NONSTATIC_OOP: 4033 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4034 real_offset = next_nonstatic_padded_offset; 4035 next_nonstatic_padded_offset += heapOopSize; 4036 4037 // Record this oop in the oop maps 4038 if( nonstatic_oop_map_count > 0 && 4039 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4040 real_offset - 4041 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4042 heapOopSize ) { 4043 // This oop is adjacent to the previous one, add to current oop map 4044 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4045 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4046 } else { 4047 // This oop is not adjacent to the previous one, create new oop map 4048 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4049 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4050 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4051 nonstatic_oop_map_count += 1; 4052 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4053 first_nonstatic_oop_offset = real_offset; 4054 } 4055 } 4056 break; 4057 4058 default: 4059 ShouldNotReachHere(); 4060 } 4061 4062 if (fs.contended_group() == 0) { 4063 // Contended group defines the equivalence class over the fields: 4064 // the fields within the same contended group are not inter-padded. 4065 // The only exception is default group, which does not incur the 4066 // equivalence, and so requires intra-padding. 4067 next_nonstatic_padded_offset += ContendedPaddingWidth; 4068 } 4069 4070 fs.set_offset(real_offset); 4071 } // for 4072 4073 // Start laying out the next group. 4074 // Note that this will effectively pad the last group in the back; 4075 // this is expected to alleviate memory contention effects for 4076 // subclass fields and/or adjacent object. 4077 // If this was the default group, the padding is already in place. 4078 if (current_group != 0) { 4079 next_nonstatic_padded_offset += ContendedPaddingWidth; 4080 } 4081 } 4082 4083 // handle static fields 4084 } 4085 4086 // Entire class is contended, pad in the back. 4087 // This helps to alleviate memory contention effects for subclass fields 4088 // and/or adjacent object. 4089 if (is_contended_class) { 4090 next_nonstatic_padded_offset += ContendedPaddingWidth; 4091 } 4092 4093 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4094 4095 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); 4096 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4097 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4098 4099 int static_field_size = (static_fields_end - 4100 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4101 nonstatic_field_size = nonstatic_field_size + 4102 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4103 4104 int instance_size = align_object_size(instance_end / wordSize); 4105 4106 assert(instance_size == align_object_size(align_size_up( 4107 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4108 wordSize) / wordSize), "consistent layout helper value"); 4109 4110 // Invariant: nonstatic_field end/start should only change if there are 4111 // nonstatic fields in the class, or if the class is contended. We compare 4112 // against the non-aligned value, so that end alignment will not fail the 4113 // assert without actually having the fields. 4114 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4115 is_contended_class || 4116 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4117 4118 // Number of non-static oop map blocks allocated at end of klass. 4119 const unsigned int total_oop_map_count = 4120 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4121 first_nonstatic_oop_offset); 4122 4123 #ifndef PRODUCT 4124 if (PrintFieldLayout) { 4125 print_field_layout(_class_name, 4126 _fields, 4127 cp, 4128 instance_size, 4129 nonstatic_fields_start, 4130 nonstatic_fields_end, 4131 static_fields_end); 4132 } 4133 4134 #endif 4135 // Pass back information needed for InstanceKlass creation 4136 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4137 info->nonstatic_oop_counts = nonstatic_oop_counts; 4138 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4139 info->total_oop_map_count = total_oop_map_count; 4140 info->instance_size = instance_size; 4141 info->static_field_size = static_field_size; 4142 info->nonstatic_field_size = nonstatic_field_size; 4143 info->has_nonstatic_fields = has_nonstatic_fields; 4144 } 4145 4146 static void fill_oop_maps(const InstanceKlass* k, 4147 unsigned int nonstatic_oop_map_count, 4148 const int* nonstatic_oop_offsets, 4149 const unsigned int* nonstatic_oop_counts) { 4150 4151 assert(k != NULL, "invariant"); 4152 4153 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4154 const InstanceKlass* const super = k->superklass(); 4155 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4156 if (super_count > 0) { 4157 // Copy maps from superklass 4158 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4159 for (unsigned int i = 0; i < super_count; ++i) { 4160 *this_oop_map++ = *super_oop_map++; 4161 } 4162 } 4163 4164 if (nonstatic_oop_map_count > 0) { 4165 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4166 // The counts differ because there is no gap between superklass's last oop 4167 // field and the first local oop field. Extend the last oop map copied 4168 // from the superklass instead of creating new one. 4169 nonstatic_oop_map_count--; 4170 nonstatic_oop_offsets++; 4171 this_oop_map--; 4172 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4173 this_oop_map++; 4174 } 4175 4176 // Add new map blocks, fill them 4177 while (nonstatic_oop_map_count-- > 0) { 4178 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4179 this_oop_map->set_count(*nonstatic_oop_counts++); 4180 this_oop_map++; 4181 } 4182 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4183 this_oop_map, "sanity"); 4184 } 4185 } 4186 4187 4188 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4189 assert(ik != NULL, "invariant"); 4190 4191 const Klass* const super = ik->super(); 4192 4193 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4194 // in which case we don't have to register objects as finalizable 4195 if (!_has_empty_finalizer) { 4196 if (_has_finalizer || 4197 (super != NULL && super->has_finalizer())) { 4198 ik->set_has_finalizer(); 4199 } 4200 } 4201 4202 #ifdef ASSERT 4203 bool f = false; 4204 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4205 vmSymbols::void_method_signature()); 4206 if (m != NULL && !m->is_empty_method()) { 4207 f = true; 4208 } 4209 4210 // Spec doesn't prevent agent from redefinition of empty finalizer. 4211 // Despite the fact that it's generally bad idea and redefined finalizer 4212 // will not work as expected we shouldn't abort vm in this case 4213 if (!ik->has_redefined_this_or_super()) { 4214 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4215 } 4216 #endif 4217 4218 // Check if this klass supports the java.lang.Cloneable interface 4219 if (SystemDictionary::Cloneable_klass_loaded()) { 4220 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4221 ik->set_is_cloneable(); 4222 } 4223 } 4224 4225 // Check if this klass has a vanilla default constructor 4226 if (super == NULL) { 4227 // java.lang.Object has empty default constructor 4228 ik->set_has_vanilla_constructor(); 4229 } else { 4230 if (super->has_vanilla_constructor() && 4231 _has_vanilla_constructor) { 4232 ik->set_has_vanilla_constructor(); 4233 } 4234 #ifdef ASSERT 4235 bool v = false; 4236 if (super->has_vanilla_constructor()) { 4237 const Method* const constructor = 4238 ik->find_method(vmSymbols::object_initializer_name(), 4239 vmSymbols::void_method_signature()); 4240 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4241 v = true; 4242 } 4243 } 4244 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4245 #endif 4246 } 4247 4248 // If it cannot be fast-path allocated, set a bit in the layout helper. 4249 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4250 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4251 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4252 || ik->is_abstract() || ik->is_interface() 4253 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4254 || ik->size_helper() >= FastAllocateSizeLimit) { 4255 // Forbid fast-path allocation. 4256 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4257 ik->set_layout_helper(lh); 4258 } 4259 } 4260 4261 // Attach super classes and interface classes to class loader data 4262 static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4263 TRAPS) { 4264 assert(defined_klass != NULL, "invariant"); 4265 4266 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4267 if (defining_loader_data->is_the_null_class_loader_data()) { 4268 // Dependencies to null class loader data are implicit. 4269 return; 4270 } else { 4271 // add super class dependency 4272 Klass* const super = defined_klass->super(); 4273 if (super != NULL) { 4274 defining_loader_data->record_dependency(super, CHECK); 4275 } 4276 4277 // add super interface dependencies 4278 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4279 if (local_interfaces != NULL) { 4280 const int length = local_interfaces->length(); 4281 for (int i = 0; i < length; i++) { 4282 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4283 } 4284 } 4285 } 4286 } 4287 4288 // utility methods for appending an array with check for duplicates 4289 4290 static void append_interfaces(GrowableArray<Klass*>* result, 4291 const Array<Klass*>* const ifs) { 4292 // iterate over new interfaces 4293 for (int i = 0; i < ifs->length(); i++) { 4294 Klass* const e = ifs->at(i); 4295 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4296 // add new interface 4297 result->append_if_missing(e); 4298 } 4299 } 4300 4301 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4302 Array<Klass*>* local_ifs, 4303 ClassLoaderData* loader_data, 4304 TRAPS) { 4305 assert(local_ifs != NULL, "invariant"); 4306 assert(loader_data != NULL, "invariant"); 4307 4308 // Compute maximum size for transitive interfaces 4309 int max_transitive_size = 0; 4310 int super_size = 0; 4311 // Add superclass transitive interfaces size 4312 if (super != NULL) { 4313 super_size = super->transitive_interfaces()->length(); 4314 max_transitive_size += super_size; 4315 } 4316 // Add local interfaces' super interfaces 4317 const int local_size = local_ifs->length(); 4318 for (int i = 0; i < local_size; i++) { 4319 Klass* const l = local_ifs->at(i); 4320 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4321 } 4322 // Finally add local interfaces 4323 max_transitive_size += local_size; 4324 // Construct array 4325 if (max_transitive_size == 0) { 4326 // no interfaces, use canonicalized array 4327 return Universe::the_empty_klass_array(); 4328 } else if (max_transitive_size == super_size) { 4329 // no new local interfaces added, share superklass' transitive interface array 4330 return super->transitive_interfaces(); 4331 } else if (max_transitive_size == local_size) { 4332 // only local interfaces added, share local interface array 4333 return local_ifs; 4334 } else { 4335 ResourceMark rm; 4336 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4337 4338 // Copy down from superclass 4339 if (super != NULL) { 4340 append_interfaces(result, super->transitive_interfaces()); 4341 } 4342 4343 // Copy down from local interfaces' superinterfaces 4344 for (int i = 0; i < local_size; i++) { 4345 Klass* const l = local_ifs->at(i); 4346 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4347 } 4348 // Finally add local interfaces 4349 append_interfaces(result, local_ifs); 4350 4351 // length will be less than the max_transitive_size if duplicates were removed 4352 const int length = result->length(); 4353 assert(length <= max_transitive_size, "just checking"); 4354 Array<Klass*>* const new_result = 4355 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4356 for (int i = 0; i < length; i++) { 4357 Klass* const e = result->at(i); 4358 assert(e != NULL, "just checking"); 4359 new_result->at_put(i, e); 4360 } 4361 return new_result; 4362 } 4363 } 4364 4365 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4366 assert(this_klass != NULL, "invariant"); 4367 const Klass* const super = this_klass->super(); 4368 if (super != NULL) { 4369 4370 // If the loader is not the boot loader then throw an exception if its 4371 // superclass is in package jdk.internal.reflect and its loader is not a 4372 // special reflection class loader 4373 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) { 4374 assert(super->is_instance_klass(), "super is not instance klass"); 4375 PackageEntry* super_package = super->package(); 4376 if (super_package != NULL && 4377 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 && 4378 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) { 4379 ResourceMark rm(THREAD); 4380 Exceptions::fthrow( 4381 THREAD_AND_LOCATION, 4382 vmSymbols::java_lang_IllegalAccessError(), 4383 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s", 4384 this_klass->external_name(), 4385 this_klass->class_loader_data()->loader_name(), 4386 super->external_name()); 4387 return; 4388 } 4389 } 4390 4391 Reflection::VerifyClassAccessResults vca_result = 4392 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false); 4393 if (vca_result != Reflection::ACCESS_OK) { 4394 ResourceMark rm(THREAD); 4395 char* msg = Reflection::verify_class_access_msg(this_klass, 4396 InstanceKlass::cast(super), 4397 vca_result); 4398 if (msg == NULL) { 4399 Exceptions::fthrow( 4400 THREAD_AND_LOCATION, 4401 vmSymbols::java_lang_IllegalAccessError(), 4402 "class %s cannot access its superclass %s", 4403 this_klass->external_name(), 4404 super->external_name()); 4405 } else { 4406 // Add additional message content. 4407 Exceptions::fthrow( 4408 THREAD_AND_LOCATION, 4409 vmSymbols::java_lang_IllegalAccessError(), 4410 "superclass access check failed: %s", 4411 msg); 4412 } 4413 } 4414 } 4415 } 4416 4417 4418 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4419 assert(this_klass != NULL, "invariant"); 4420 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4421 const int lng = local_interfaces->length(); 4422 for (int i = lng - 1; i >= 0; i--) { 4423 Klass* const k = local_interfaces->at(i); 4424 assert (k != NULL && k->is_interface(), "invalid interface"); 4425 Reflection::VerifyClassAccessResults vca_result = 4426 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false); 4427 if (vca_result != Reflection::ACCESS_OK) { 4428 ResourceMark rm(THREAD); 4429 char* msg = Reflection::verify_class_access_msg(this_klass, 4430 InstanceKlass::cast(k), 4431 vca_result); 4432 if (msg == NULL) { 4433 Exceptions::fthrow( 4434 THREAD_AND_LOCATION, 4435 vmSymbols::java_lang_IllegalAccessError(), 4436 "class %s cannot access its superinterface %s", 4437 this_klass->external_name(), 4438 k->external_name()); 4439 } else { 4440 // Add additional message content. 4441 Exceptions::fthrow( 4442 THREAD_AND_LOCATION, 4443 vmSymbols::java_lang_IllegalAccessError(), 4444 "superinterface check failed: %s", 4445 msg); 4446 } 4447 } 4448 } 4449 } 4450 4451 4452 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4453 assert(this_klass != NULL, "invariant"); 4454 const Array<Method*>* const methods = this_klass->methods(); 4455 const int num_methods = methods->length(); 4456 4457 // go thru each method and check if it overrides a final method 4458 for (int index = 0; index < num_methods; index++) { 4459 const Method* const m = methods->at(index); 4460 4461 // skip private, static, and <init> methods 4462 if ((!m->is_private() && !m->is_static()) && 4463 (m->name() != vmSymbols::object_initializer_name())) { 4464 4465 const Symbol* const name = m->name(); 4466 const Symbol* const signature = m->signature(); 4467 const Klass* k = this_klass->super(); 4468 const Method* super_m = NULL; 4469 while (k != NULL) { 4470 // skip supers that don't have final methods. 4471 if (k->has_final_method()) { 4472 // lookup a matching method in the super class hierarchy 4473 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4474 if (super_m == NULL) { 4475 break; // didn't find any match; get out 4476 } 4477 4478 if (super_m->is_final() && !super_m->is_static() && 4479 // matching method in super is final, and not static 4480 (Reflection::verify_field_access(this_klass, 4481 super_m->method_holder(), 4482 super_m->method_holder(), 4483 super_m->access_flags(), false)) 4484 // this class can access super final method and therefore override 4485 ) { 4486 ResourceMark rm(THREAD); 4487 Exceptions::fthrow( 4488 THREAD_AND_LOCATION, 4489 vmSymbols::java_lang_VerifyError(), 4490 "class %s overrides final method %s.%s%s", 4491 this_klass->external_name(), 4492 super_m->method_holder()->external_name(), 4493 name->as_C_string(), 4494 signature->as_C_string() 4495 ); 4496 return; 4497 } 4498 4499 // continue to look from super_m's holder's super. 4500 k = super_m->method_holder()->super(); 4501 continue; 4502 } 4503 4504 k = k->super(); 4505 } 4506 } 4507 } 4508 } 4509 4510 4511 // assumes that this_klass is an interface 4512 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4513 assert(this_klass != NULL, "invariant"); 4514 assert(this_klass->is_interface(), "not an interface"); 4515 const Array<Method*>* methods = this_klass->methods(); 4516 const int num_methods = methods->length(); 4517 4518 for (int index = 0; index < num_methods; index++) { 4519 const Method* const m = methods->at(index); 4520 // if m is static and not the init method, throw a verify error 4521 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4522 ResourceMark rm(THREAD); 4523 Exceptions::fthrow( 4524 THREAD_AND_LOCATION, 4525 vmSymbols::java_lang_VerifyError(), 4526 "Illegal static method %s in interface %s", 4527 m->name()->as_C_string(), 4528 this_klass->external_name() 4529 ); 4530 return; 4531 } 4532 } 4533 } 4534 4535 // utility methods for format checking 4536 4537 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4538 if (!_need_verify) { return; } 4539 4540 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4541 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4542 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4543 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4544 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4545 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4546 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0; 4547 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4548 4549 if ((is_abstract && is_final) || 4550 (is_interface && !is_abstract) || 4551 (is_interface && major_gte_15 && (is_super || is_enum)) || 4552 (!is_interface && major_gte_15 && is_annotation) || 4553 is_module_info) { 4554 ResourceMark rm(THREAD); 4555 Exceptions::fthrow( 4556 THREAD_AND_LOCATION, 4557 vmSymbols::java_lang_ClassFormatError(), 4558 "Illegal class modifiers in class %s: 0x%X", 4559 _class_name->as_C_string(), flags 4560 ); 4561 return; 4562 } 4563 } 4564 4565 static bool has_illegal_visibility(jint flags) { 4566 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4567 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4568 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4569 4570 return ((is_public && is_protected) || 4571 (is_public && is_private) || 4572 (is_protected && is_private)); 4573 } 4574 4575 static bool is_supported_version(u2 major, u2 minor){ 4576 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4577 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4578 (major <= max_version) && 4579 ((major != max_version) || 4580 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4581 } 4582 4583 void ClassFileParser::verify_legal_field_modifiers(jint flags, 4584 bool is_interface, 4585 TRAPS) const { 4586 if (!_need_verify) { return; } 4587 4588 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4589 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4590 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4591 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4592 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4593 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4594 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4595 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4596 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4597 4598 bool is_illegal = false; 4599 4600 if (is_interface) { 4601 if (!is_public || !is_static || !is_final || is_private || 4602 is_protected || is_volatile || is_transient || 4603 (major_gte_15 && is_enum)) { 4604 is_illegal = true; 4605 } 4606 } else { // not interface 4607 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4608 is_illegal = true; 4609 } 4610 } 4611 4612 if (is_illegal) { 4613 ResourceMark rm(THREAD); 4614 Exceptions::fthrow( 4615 THREAD_AND_LOCATION, 4616 vmSymbols::java_lang_ClassFormatError(), 4617 "Illegal field modifiers in class %s: 0x%X", 4618 _class_name->as_C_string(), flags); 4619 return; 4620 } 4621 } 4622 4623 void ClassFileParser::verify_legal_method_modifiers(jint flags, 4624 bool is_interface, 4625 const Symbol* name, 4626 TRAPS) const { 4627 if (!_need_verify) { return; } 4628 4629 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4630 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4631 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4632 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4633 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4634 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4635 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4636 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4637 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4638 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4639 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4640 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4641 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4642 4643 bool is_illegal = false; 4644 4645 if (is_interface) { 4646 if (major_gte_8) { 4647 // Class file version is JAVA_8_VERSION or later Methods of 4648 // interfaces may set any of the flags except ACC_PROTECTED, 4649 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4650 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4651 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4652 (is_native || is_protected || is_final || is_synchronized) || 4653 // If a specific method of a class or interface has its 4654 // ACC_ABSTRACT flag set, it must not have any of its 4655 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4656 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4657 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4658 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4659 (is_abstract && (is_private || is_static || is_strict))) { 4660 is_illegal = true; 4661 } 4662 } else if (major_gte_15) { 4663 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4664 if (!is_public || is_private || is_protected || is_static || is_final || 4665 is_synchronized || is_native || !is_abstract || is_strict) { 4666 is_illegal = true; 4667 } 4668 } else { 4669 // Class file version is pre-JAVA_1_5_VERSION 4670 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4671 is_illegal = true; 4672 } 4673 } 4674 } else { // not interface 4675 if (has_illegal_visibility(flags)) { 4676 is_illegal = true; 4677 } else { 4678 if (is_initializer) { 4679 if (is_static || is_final || is_synchronized || is_native || 4680 is_abstract || (major_gte_15 && is_bridge)) { 4681 is_illegal = true; 4682 } 4683 } else { // not initializer 4684 if (is_abstract) { 4685 if ((is_final || is_native || is_private || is_static || 4686 (major_gte_15 && (is_synchronized || is_strict)))) { 4687 is_illegal = true; 4688 } 4689 } 4690 } 4691 } 4692 } 4693 4694 if (is_illegal) { 4695 ResourceMark rm(THREAD); 4696 Exceptions::fthrow( 4697 THREAD_AND_LOCATION, 4698 vmSymbols::java_lang_ClassFormatError(), 4699 "Method %s in class %s has illegal modifiers: 0x%X", 4700 name->as_C_string(), _class_name->as_C_string(), flags); 4701 return; 4702 } 4703 } 4704 4705 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4706 int length, 4707 TRAPS) const { 4708 assert(_need_verify, "only called when _need_verify is true"); 4709 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) { 4710 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4711 } 4712 } 4713 4714 // Unqualified names may not contain the characters '.', ';', '[', or '/'. 4715 // In class names, '/' separates unqualified names. This is verified in this function also. 4716 // Method names also may not contain the characters '<' or '>', unless <init> 4717 // or <clinit>. Note that method names may not be <init> or <clinit> in this 4718 // method. Because these names have been checked as special cases before 4719 // calling this method in verify_legal_method_name. 4720 // 4721 // This method is also called from the modular system APIs in modules.cpp 4722 // to verify the validity of module and package names. 4723 bool ClassFileParser::verify_unqualified_name(const char* name, 4724 unsigned int length, 4725 int type) { 4726 for (const char* p = name; p != name + length;) { 4727 jchar ch = *p; 4728 if (ch < 128) { 4729 if (ch == '.' || ch == ';' || ch == '[' ) { 4730 return false; // do not permit '.', ';', or '[' 4731 } 4732 if (ch == '/') { 4733 // check for '//' or leading or trailing '/' which are not legal 4734 // unqualified name must not be empty 4735 if (type == ClassFileParser::LegalClass) { 4736 if (p == name || p+1 >= name+length || *(p+1) == '/') { 4737 return false; 4738 } 4739 } else { 4740 return false; // do not permit '/' unless it's class name 4741 } 4742 } 4743 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) { 4744 return false; // do not permit '<' or '>' in method names 4745 } 4746 p++; 4747 } else { 4748 char* tmp_p = UTF8::next(p, &ch); 4749 p = tmp_p; 4750 } 4751 } 4752 return true; 4753 } 4754 4755 // Take pointer to a string. Skip over the longest part of the string that could 4756 // be taken as a fieldname. Allow '/' if slash_ok is true. 4757 // Return a pointer to just past the fieldname. 4758 // Return NULL if no fieldname at all was found, or in the case of slash_ok 4759 // being true, we saw consecutive slashes (meaning we were looking for a 4760 // qualified path but found something that was badly-formed). 4761 static const char* skip_over_field_name(const char* name, 4762 bool slash_ok, 4763 unsigned int length) { 4764 const char* p; 4765 jboolean last_is_slash = false; 4766 jboolean not_first_ch = false; 4767 4768 for (p = name; p != name + length; not_first_ch = true) { 4769 const char* old_p = p; 4770 jchar ch = *p; 4771 if (ch < 128) { 4772 p++; 4773 // quick check for ascii 4774 if ((ch >= 'a' && ch <= 'z') || 4775 (ch >= 'A' && ch <= 'Z') || 4776 (ch == '_' || ch == '$') || 4777 (not_first_ch && ch >= '0' && ch <= '9')) { 4778 last_is_slash = false; 4779 continue; 4780 } 4781 if (slash_ok && ch == '/') { 4782 if (last_is_slash) { 4783 return NULL; // Don't permit consecutive slashes 4784 } 4785 last_is_slash = true; 4786 continue; 4787 } 4788 } 4789 else { 4790 jint unicode_ch; 4791 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4792 p = tmp_p; 4793 last_is_slash = false; 4794 // Check if ch is Java identifier start or is Java identifier part 4795 // 4672820: call java.lang.Character methods directly without generating separate tables. 4796 EXCEPTION_MARK; 4797 4798 // return value 4799 JavaValue result(T_BOOLEAN); 4800 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4801 JavaCallArguments args; 4802 args.push_int(unicode_ch); 4803 4804 // public static boolean isJavaIdentifierStart(char ch); 4805 JavaCalls::call_static(&result, 4806 SystemDictionary::Character_klass(), 4807 vmSymbols::isJavaIdentifierStart_name(), 4808 vmSymbols::int_bool_signature(), 4809 &args, 4810 THREAD); 4811 4812 if (HAS_PENDING_EXCEPTION) { 4813 CLEAR_PENDING_EXCEPTION; 4814 return 0; 4815 } 4816 if (result.get_jboolean()) { 4817 continue; 4818 } 4819 4820 if (not_first_ch) { 4821 // public static boolean isJavaIdentifierPart(char ch); 4822 JavaCalls::call_static(&result, 4823 SystemDictionary::Character_klass(), 4824 vmSymbols::isJavaIdentifierPart_name(), 4825 vmSymbols::int_bool_signature(), 4826 &args, 4827 THREAD); 4828 4829 if (HAS_PENDING_EXCEPTION) { 4830 CLEAR_PENDING_EXCEPTION; 4831 return 0; 4832 } 4833 4834 if (result.get_jboolean()) { 4835 continue; 4836 } 4837 } 4838 } 4839 return (not_first_ch) ? old_p : NULL; 4840 } 4841 return (not_first_ch) ? p : NULL; 4842 } 4843 4844 // Take pointer to a string. Skip over the longest part of the string that could 4845 // be taken as a field signature. Allow "void" if void_ok. 4846 // Return a pointer to just past the signature. 4847 // Return NULL if no legal signature is found. 4848 const char* ClassFileParser::skip_over_field_signature(const char* signature, 4849 bool void_ok, 4850 unsigned int length, 4851 TRAPS) const { 4852 unsigned int array_dim = 0; 4853 while (length > 0) { 4854 switch (signature[0]) { 4855 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4856 case JVM_SIGNATURE_BOOLEAN: 4857 case JVM_SIGNATURE_BYTE: 4858 case JVM_SIGNATURE_CHAR: 4859 case JVM_SIGNATURE_SHORT: 4860 case JVM_SIGNATURE_INT: 4861 case JVM_SIGNATURE_FLOAT: 4862 case JVM_SIGNATURE_LONG: 4863 case JVM_SIGNATURE_DOUBLE: 4864 return signature + 1; 4865 case JVM_SIGNATURE_CLASS: { 4866 if (_major_version < JAVA_1_5_VERSION) { 4867 // Skip over the class name if one is there 4868 const char* const p = skip_over_field_name(signature + 1, true, --length); 4869 4870 // The next character better be a semicolon 4871 if (p && (p - signature) > 1 && p[0] == ';') { 4872 return p + 1; 4873 } 4874 } 4875 else { 4876 // Skip leading 'L' and ignore first appearance of ';' 4877 length--; 4878 signature++; 4879 char* c = strchr((char*) signature, ';'); 4880 // Format check signature 4881 if (c != NULL) { 4882 ResourceMark rm(THREAD); 4883 int newlen = c - (char*) signature; 4884 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1); 4885 strncpy(sig, signature, newlen); 4886 sig[newlen] = '\0'; 4887 4888 bool legal = verify_unqualified_name(sig, newlen, LegalClass); 4889 if (!legal) { 4890 classfile_parse_error("Class name contains illegal character " 4891 "in descriptor in class file %s", 4892 CHECK_0); 4893 return NULL; 4894 } 4895 return signature + newlen + 1; 4896 } 4897 } 4898 return NULL; 4899 } 4900 case JVM_SIGNATURE_ARRAY: 4901 array_dim++; 4902 if (array_dim > 255) { 4903 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4904 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4905 } 4906 // The rest of what's there better be a legal signature 4907 signature++; 4908 length--; 4909 void_ok = false; 4910 break; 4911 default: 4912 return NULL; 4913 } 4914 } 4915 return NULL; 4916 } 4917 4918 // Checks if name is a legal class name. 4919 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4920 if (!_need_verify || _relax_verify) { return; } 4921 4922 char buf[fixed_buffer_size]; 4923 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4924 unsigned int length = name->utf8_length(); 4925 bool legal = false; 4926 4927 if (length > 0) { 4928 const char* p; 4929 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4930 p = skip_over_field_signature(bytes, false, length, CHECK); 4931 legal = (p != NULL) && ((p - bytes) == (int)length); 4932 } else if (_major_version < JAVA_1_5_VERSION) { 4933 if (bytes[0] != '<') { 4934 p = skip_over_field_name(bytes, true, length); 4935 legal = (p != NULL) && ((p - bytes) == (int)length); 4936 } 4937 } else { 4938 // 4900761: relax the constraints based on JSR202 spec 4939 // Class names may be drawn from the entire Unicode character set. 4940 // Identifiers between '/' must be unqualified names. 4941 // The utf8 string has been verified when parsing cpool entries. 4942 legal = verify_unqualified_name(bytes, length, LegalClass); 4943 } 4944 } 4945 if (!legal) { 4946 ResourceMark rm(THREAD); 4947 assert(_class_name != NULL, "invariant"); 4948 Exceptions::fthrow( 4949 THREAD_AND_LOCATION, 4950 vmSymbols::java_lang_ClassFormatError(), 4951 "Illegal class name \"%s\" in class file %s", bytes, 4952 _class_name->as_C_string() 4953 ); 4954 return; 4955 } 4956 } 4957 4958 // Checks if name is a legal field name. 4959 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 4960 if (!_need_verify || _relax_verify) { return; } 4961 4962 char buf[fixed_buffer_size]; 4963 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4964 unsigned int length = name->utf8_length(); 4965 bool legal = false; 4966 4967 if (length > 0) { 4968 if (_major_version < JAVA_1_5_VERSION) { 4969 if (bytes[0] != '<') { 4970 const char* p = skip_over_field_name(bytes, false, length); 4971 legal = (p != NULL) && ((p - bytes) == (int)length); 4972 } 4973 } else { 4974 // 4881221: relax the constraints based on JSR202 spec 4975 legal = verify_unqualified_name(bytes, length, LegalField); 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 field name \"%s\" in class %s", bytes, 4986 _class_name->as_C_string() 4987 ); 4988 return; 4989 } 4990 } 4991 4992 // Checks if name is a legal method name. 4993 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 4994 if (!_need_verify || _relax_verify) { return; } 4995 4996 assert(name != NULL, "method name is null"); 4997 char buf[fixed_buffer_size]; 4998 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4999 unsigned int length = name->utf8_length(); 5000 bool legal = false; 5001 5002 if (length > 0) { 5003 if (bytes[0] == '<') { 5004 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 5005 legal = true; 5006 } 5007 } else if (_major_version < JAVA_1_5_VERSION) { 5008 const char* p; 5009 p = skip_over_field_name(bytes, false, length); 5010 legal = (p != NULL) && ((p - bytes) == (int)length); 5011 } else { 5012 // 4881221: relax the constraints based on JSR202 spec 5013 legal = verify_unqualified_name(bytes, length, LegalMethod); 5014 } 5015 } 5016 5017 if (!legal) { 5018 ResourceMark rm(THREAD); 5019 assert(_class_name != NULL, "invariant"); 5020 Exceptions::fthrow( 5021 THREAD_AND_LOCATION, 5022 vmSymbols::java_lang_ClassFormatError(), 5023 "Illegal method name \"%s\" in class %s", bytes, 5024 _class_name->as_C_string() 5025 ); 5026 return; 5027 } 5028 } 5029 5030 5031 // Checks if signature is a legal field signature. 5032 void ClassFileParser::verify_legal_field_signature(const Symbol* name, 5033 const Symbol* signature, 5034 TRAPS) const { 5035 if (!_need_verify) { return; } 5036 5037 char buf[fixed_buffer_size]; 5038 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5039 const unsigned int length = signature->utf8_length(); 5040 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5041 5042 if (p == NULL || (p - bytes) != (int)length) { 5043 throwIllegalSignature("Field", name, signature, CHECK); 5044 } 5045 } 5046 5047 // Checks if signature is a legal method signature. 5048 // Returns number of parameters 5049 int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5050 const Symbol* signature, 5051 TRAPS) const { 5052 if (!_need_verify) { 5053 // make sure caller's args_size will be less than 0 even for non-static 5054 // method so it will be recomputed in compute_size_of_parameters(). 5055 return -2; 5056 } 5057 5058 // Class initializers cannot have args for class format version >= 51. 5059 if (name == vmSymbols::class_initializer_name() && 5060 signature != vmSymbols::void_method_signature() && 5061 _major_version >= JAVA_7_VERSION) { 5062 throwIllegalSignature("Method", name, signature, CHECK_0); 5063 return 0; 5064 } 5065 5066 unsigned int args_size = 0; 5067 char buf[fixed_buffer_size]; 5068 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5069 unsigned int length = signature->utf8_length(); 5070 const char* nextp; 5071 5072 // The first character must be a '(' 5073 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5074 length--; 5075 // Skip over legal field signatures 5076 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5077 while ((length > 0) && (nextp != NULL)) { 5078 args_size++; 5079 if (p[0] == 'J' || p[0] == 'D') { 5080 args_size++; 5081 } 5082 length -= nextp - p; 5083 p = nextp; 5084 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5085 } 5086 // The first non-signature thing better be a ')' 5087 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5088 length--; 5089 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5090 // All internal methods must return void 5091 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5092 return args_size; 5093 } 5094 } else { 5095 // Now we better just have a return value 5096 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5097 if (nextp && ((int)length == (nextp - p))) { 5098 return args_size; 5099 } 5100 } 5101 } 5102 } 5103 // Report error 5104 throwIllegalSignature("Method", name, signature, CHECK_0); 5105 return 0; 5106 } 5107 5108 int ClassFileParser::static_field_size() const { 5109 assert(_field_info != NULL, "invariant"); 5110 return _field_info->static_field_size; 5111 } 5112 5113 int ClassFileParser::total_oop_map_count() const { 5114 assert(_field_info != NULL, "invariant"); 5115 return _field_info->total_oop_map_count; 5116 } 5117 5118 jint ClassFileParser::layout_size() const { 5119 assert(_field_info != NULL, "invariant"); 5120 return _field_info->instance_size; 5121 } 5122 5123 static void check_methods_for_intrinsics(const InstanceKlass* ik, 5124 const Array<Method*>* methods) { 5125 assert(ik != NULL, "invariant"); 5126 assert(methods != NULL, "invariant"); 5127 5128 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5129 // (We used to do this lazily, but now we query it in Rewriter, 5130 // which is eagerly done for every method, so we might as well do it now, 5131 // when everything is fresh in memory.) 5132 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5133 5134 if (klass_id != vmSymbols::NO_SID) { 5135 for (int j = 0; j < methods->length(); ++j) { 5136 Method* method = methods->at(j); 5137 method->init_intrinsic_id(); 5138 5139 if (CheckIntrinsics) { 5140 // Check if an intrinsic is defined for method 'method', 5141 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5142 if (method->intrinsic_id() != vmIntrinsics::_none && 5143 !method->intrinsic_candidate()) { 5144 tty->print("Compiler intrinsic is defined for method [%s], " 5145 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5146 method->name_and_sig_as_C_string(), 5147 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5148 ); 5149 tty->cr(); 5150 DEBUG_ONLY(vm_exit(1)); 5151 } 5152 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5153 // but there is no intrinsic available for it. 5154 if (method->intrinsic_candidate() && 5155 method->intrinsic_id() == vmIntrinsics::_none) { 5156 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5157 "but no compiler intrinsic is defined for the method.%s", 5158 method->name_and_sig_as_C_string(), 5159 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5160 ); 5161 tty->cr(); 5162 DEBUG_ONLY(vm_exit(1)); 5163 } 5164 } 5165 } // end for 5166 5167 #ifdef ASSERT 5168 if (CheckIntrinsics) { 5169 // Check for orphan methods in the current class. A method m 5170 // of a class C is orphan if an intrinsic is defined for method m, 5171 // but class C does not declare m. 5172 // The check is potentially expensive, therefore it is available 5173 // only in debug builds. 5174 5175 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5176 if (vmIntrinsics::_compiledLambdaForm == id) { 5177 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5178 // generated for the JVM from a LambdaForm and therefore no method 5179 // is defined for it. 5180 continue; 5181 } 5182 5183 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5184 // Check if the current class contains a method with the same 5185 // name, flags, signature. 5186 bool match = false; 5187 for (int j = 0; j < methods->length(); ++j) { 5188 const Method* method = methods->at(j); 5189 if (method->intrinsic_id() == id) { 5190 match = true; 5191 break; 5192 } 5193 } 5194 5195 if (!match) { 5196 char buf[1000]; 5197 tty->print("Compiler intrinsic is defined for method [%s], " 5198 "but the method is not available in class [%s].%s", 5199 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5200 buf, sizeof(buf)), 5201 ik->name()->as_C_string(), 5202 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5203 ); 5204 tty->cr(); 5205 DEBUG_ONLY(vm_exit(1)); 5206 } 5207 } 5208 } // end for 5209 } // CheckIntrinsics 5210 #endif // ASSERT 5211 } 5212 } 5213 5214 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) { 5215 if (_klass != NULL) { 5216 return _klass; 5217 } 5218 5219 InstanceKlass* const ik = 5220 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5221 5222 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL); 5223 5224 assert(_klass == ik, "invariant"); 5225 5226 ik->set_has_passed_fingerprint_check(false); 5227 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) { 5228 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik); 5229 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) { 5230 // This class matches with a class saved in an AOT library 5231 ik->set_has_passed_fingerprint_check(true); 5232 } else { 5233 ResourceMark rm; 5234 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT, 5235 ik->external_name(), aot_fp, _stream->compute_fingerprint()); 5236 } 5237 } 5238 5239 return ik; 5240 } 5241 5242 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) { 5243 assert(ik != NULL, "invariant"); 5244 5245 set_klass_to_deallocate(ik); 5246 5247 assert(_field_info != NULL, "invariant"); 5248 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5249 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5250 "sanity"); 5251 5252 assert(ik->is_instance_klass(), "sanity"); 5253 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5254 5255 // Fill in information already parsed 5256 ik->set_should_verify_class(_need_verify); 5257 5258 // Not yet: supers are done below to support the new subtype-checking fields 5259 ik->set_class_loader_data(_loader_data); 5260 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5261 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5262 assert(_fac != NULL, "invariant"); 5263 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5264 5265 // this transfers ownership of a lot of arrays from 5266 // the parser onto the InstanceKlass* 5267 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5268 5269 // note that is not safe to use the fields in the parser from this point on 5270 assert(NULL == _cp, "invariant"); 5271 assert(NULL == _fields, "invariant"); 5272 assert(NULL == _methods, "invariant"); 5273 assert(NULL == _inner_classes, "invariant"); 5274 assert(NULL == _local_interfaces, "invariant"); 5275 assert(NULL == _transitive_interfaces, "invariant"); 5276 assert(NULL == _combined_annotations, "invariant"); 5277 5278 if (_has_final_method) { 5279 ik->set_has_final_method(); 5280 } 5281 5282 ik->copy_method_ordering(_method_ordering, CHECK); 5283 // The InstanceKlass::_methods_jmethod_ids cache 5284 // is managed on the assumption that the initial cache 5285 // size is equal to the number of methods in the class. If 5286 // that changes, then InstanceKlass::idnum_can_increment() 5287 // has to be changed accordingly. 5288 ik->set_initial_method_idnum(ik->methods()->length()); 5289 5290 ik->set_name(_class_name); 5291 5292 if (is_anonymous()) { 5293 // I am well known to myself 5294 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve 5295 } 5296 5297 ik->set_minor_version(_minor_version); 5298 ik->set_major_version(_major_version); 5299 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods); 5300 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods); 5301 5302 if (_host_klass != NULL) { 5303 assert (ik->is_anonymous(), "should be the same"); 5304 ik->set_host_klass(_host_klass); 5305 } 5306 5307 // Set PackageEntry for this_klass 5308 oop cl = ik->class_loader(); 5309 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl)); 5310 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh()); 5311 ik->set_package(cld, CHECK); 5312 5313 const Array<Method*>* const methods = ik->methods(); 5314 assert(methods != NULL, "invariant"); 5315 const int methods_len = methods->length(); 5316 5317 check_methods_for_intrinsics(ik, methods); 5318 5319 // Fill in field values obtained by parse_classfile_attributes 5320 if (_parsed_annotations->has_any_annotations()) { 5321 _parsed_annotations->apply_to(ik); 5322 } 5323 5324 apply_parsed_class_attributes(ik); 5325 5326 // Miranda methods 5327 if ((_num_miranda_methods > 0) || 5328 // if this class introduced new miranda methods or 5329 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5330 // super class exists and this class inherited miranda methods 5331 ) { 5332 ik->set_has_miranda_methods(); // then set a flag 5333 } 5334 5335 // Fill in information needed to compute superclasses. 5336 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5337 5338 // Initialize itable offset tables 5339 klassItable::setup_itable_offset_table(ik); 5340 5341 // Compute transitive closure of interfaces this class implements 5342 // Do final class setup 5343 fill_oop_maps(ik, 5344 _field_info->nonstatic_oop_map_count, 5345 _field_info->nonstatic_oop_offsets, 5346 _field_info->nonstatic_oop_counts); 5347 5348 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5349 set_precomputed_flags(ik); 5350 5351 // check if this class can access its super class 5352 check_super_class_access(ik, CHECK); 5353 5354 // check if this class can access its superinterfaces 5355 check_super_interface_access(ik, CHECK); 5356 5357 // check if this class overrides any final method 5358 check_final_method_override(ik, CHECK); 5359 5360 // reject static interface methods prior to Java 8 5361 if (ik->is_interface() && _major_version < JAVA_8_VERSION) { 5362 check_illegal_static_method(ik, CHECK); 5363 } 5364 5365 // Obtain this_klass' module entry 5366 ModuleEntry* module_entry = ik->module(); 5367 assert(module_entry != NULL, "module_entry should always be set"); 5368 5369 // Obtain java.lang.reflect.Module 5370 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module())); 5371 5372 // Allocate mirror and initialize static fields 5373 // The create_mirror() call will also call compute_modifiers() 5374 java_lang_Class::create_mirror(ik, 5375 Handle(THREAD, _loader_data->class_loader()), 5376 module_handle, 5377 _protection_domain, 5378 CHECK); 5379 5380 assert(_all_mirandas != NULL, "invariant"); 5381 5382 // Generate any default methods - default methods are public interface methods 5383 // that have a default implementation. This is new with Java 8. 5384 if (_has_nonstatic_concrete_methods) { 5385 DefaultMethods::generate_default_methods(ik, 5386 _all_mirandas, 5387 CHECK); 5388 } 5389 5390 // Add read edges to the unnamed modules of the bootstrap and app class loaders. 5391 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() && 5392 !module_entry->has_default_read_edges()) { 5393 if (!module_entry->set_has_default_read_edges()) { 5394 // We won a potential race 5395 JvmtiExport::add_default_read_edges(module_handle, THREAD); 5396 } 5397 } 5398 5399 // Update the loader_data graph. 5400 record_defined_class_dependencies(ik, CHECK); 5401 5402 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5403 5404 if (!is_internal()) { 5405 if (log_is_enabled(Info, class, load)) { 5406 ResourceMark rm; 5407 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string(); 5408 5409 if (log_is_enabled(Info, class, load)) { 5410 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream); 5411 } 5412 // No 'else' here as logging levels are not mutually exclusive 5413 if (log_is_enabled(Debug, class, load)) { 5414 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream); 5415 } 5416 } 5417 5418 if (log_is_enabled(Debug, class, resolve)) { 5419 ResourceMark rm; 5420 // print out the superclass. 5421 const char * from = ik->external_name(); 5422 if (ik->java_super() != NULL) { 5423 log_debug(class, resolve)("%s %s (super)", 5424 from, 5425 ik->java_super()->external_name()); 5426 } 5427 // print out each of the interface classes referred to by this class. 5428 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5429 if (local_interfaces != NULL) { 5430 const int length = local_interfaces->length(); 5431 for (int i = 0; i < length; i++) { 5432 const Klass* const k = local_interfaces->at(i); 5433 const char * to = k->external_name(); 5434 log_debug(class, resolve)("%s %s (interface)", from, to); 5435 } 5436 } 5437 } 5438 } 5439 5440 TRACE_INIT_ID(ik); 5441 5442 // If we reach here, all is well. 5443 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5444 // in order for it to not be destroyed in the ClassFileParser destructor. 5445 set_klass_to_deallocate(NULL); 5446 5447 // it's official 5448 set_klass(ik); 5449 5450 debug_only(ik->verify();) 5451 } 5452 5453 // For an anonymous class that is in the unnamed package, move it to its host class's 5454 // package by prepending its host class's package name to its class name and setting 5455 // its _class_name field. 5456 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) { 5457 ResourceMark rm(THREAD); 5458 assert(strrchr(_class_name->as_C_string(), '/') == NULL, 5459 "Anonymous class should not be in a package"); 5460 const char* host_pkg_name = 5461 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL); 5462 5463 if (host_pkg_name != NULL) { 5464 size_t host_pkg_len = strlen(host_pkg_name); 5465 int class_name_len = _class_name->utf8_length(); 5466 char* new_anon_name = 5467 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len); 5468 // Copy host package name and trailing /. 5469 strncpy(new_anon_name, host_pkg_name, host_pkg_len); 5470 new_anon_name[host_pkg_len] = '/'; 5471 // Append anonymous class name. The anonymous class name can contain odd 5472 // characters. So, do a strncpy instead of using sprintf("%s..."). 5473 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len); 5474 5475 // Create a symbol and update the anonymous class name. 5476 _class_name = SymbolTable::new_symbol(new_anon_name, 5477 (int)host_pkg_len + 1 + class_name_len, 5478 CHECK); 5479 } 5480 } 5481 5482 // If the host class and the anonymous class are in the same package then do 5483 // nothing. If the anonymous class is in the unnamed package then move it to its 5484 // host's package. If the classes are in different packages then throw an IAE 5485 // exception. 5486 void ClassFileParser::fix_anonymous_class_name(TRAPS) { 5487 assert(_host_klass != NULL, "Expected an anonymous class"); 5488 5489 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(), 5490 _class_name->utf8_length(), '/'); 5491 if (anon_last_slash == NULL) { // Unnamed package 5492 prepend_host_package_name(_host_klass, CHECK); 5493 } else { 5494 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(), 5495 _host_klass->name(), 5496 _host_klass->class_loader(), 5497 _class_name)) { 5498 ResourceMark rm(THREAD); 5499 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 5500 err_msg("Host class %s and anonymous class %s are in different packages", 5501 _host_klass->name()->as_C_string(), _class_name->as_C_string())); 5502 } 5503 } 5504 } 5505 5506 static bool relax_format_check_for(ClassLoaderData* loader_data) { 5507 bool trusted = (loader_data->is_the_null_class_loader_data() || 5508 SystemDictionary::is_platform_class_loader(loader_data->class_loader())); 5509 bool need_verify = 5510 // verifyAll 5511 (BytecodeVerificationLocal && BytecodeVerificationRemote) || 5512 // verifyRemote 5513 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); 5514 return !need_verify; 5515 } 5516 5517 ClassFileParser::ClassFileParser(ClassFileStream* stream, 5518 Symbol* name, 5519 ClassLoaderData* loader_data, 5520 Handle protection_domain, 5521 const InstanceKlass* host_klass, 5522 GrowableArray<Handle>* cp_patches, 5523 Publicity pub_level, 5524 TRAPS) : 5525 _stream(stream), 5526 _requested_name(name), 5527 _loader_data(loader_data), 5528 _host_klass(host_klass), 5529 _cp_patches(cp_patches), 5530 _super_klass(), 5531 _cp(NULL), 5532 _fields(NULL), 5533 _methods(NULL), 5534 _inner_classes(NULL), 5535 _local_interfaces(NULL), 5536 _transitive_interfaces(NULL), 5537 _combined_annotations(NULL), 5538 _annotations(NULL), 5539 _type_annotations(NULL), 5540 _fields_annotations(NULL), 5541 _fields_type_annotations(NULL), 5542 _klass(NULL), 5543 _klass_to_deallocate(NULL), 5544 _parsed_annotations(NULL), 5545 _fac(NULL), 5546 _field_info(NULL), 5547 _method_ordering(NULL), 5548 _all_mirandas(NULL), 5549 _vtable_size(0), 5550 _itable_size(0), 5551 _num_miranda_methods(0), 5552 _rt(REF_NONE), 5553 _protection_domain(protection_domain), 5554 _access_flags(), 5555 _pub_level(pub_level), 5556 _synthetic_flag(false), 5557 _sde_length(false), 5558 _sde_buffer(NULL), 5559 _sourcefile_index(0), 5560 _generic_signature_index(0), 5561 _major_version(0), 5562 _minor_version(0), 5563 _this_class_index(0), 5564 _super_class_index(0), 5565 _itfs_len(0), 5566 _java_fields_count(0), 5567 _need_verify(false), 5568 _relax_verify(false), 5569 _has_nonstatic_concrete_methods(false), 5570 _declares_nonstatic_concrete_methods(false), 5571 _has_final_method(false), 5572 _has_finalizer(false), 5573 _has_empty_finalizer(false), 5574 _has_vanilla_constructor(false), 5575 _max_bootstrap_specifier_index(-1) { 5576 5577 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5578 5579 assert(THREAD->is_Java_thread(), "invariant"); 5580 assert(_loader_data != NULL, "invariant"); 5581 assert(stream != NULL, "invariant"); 5582 assert(_stream != NULL, "invariant"); 5583 assert(_stream->buffer() == _stream->current(), "invariant"); 5584 assert(_class_name != NULL, "invariant"); 5585 assert(0 == _access_flags.as_int(), "invariant"); 5586 5587 // Figure out whether we can skip format checking (matching classic VM behavior) 5588 if (DumpSharedSpaces) { 5589 // verify == true means it's a 'remote' class (i.e., non-boot class) 5590 // Verification decision is based on BytecodeVerificationRemote flag 5591 // for those classes. 5592 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5593 BytecodeVerificationLocal; 5594 } 5595 else { 5596 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5597 stream->need_verify()); 5598 } 5599 5600 // synch back verification state to stream 5601 stream->set_verify(_need_verify); 5602 5603 // Check if verification needs to be relaxed for this class file 5604 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5605 _relax_verify = relax_format_check_for(_loader_data); 5606 5607 parse_stream(stream, CHECK); 5608 5609 post_process_parsed_stream(stream, _cp, CHECK); 5610 } 5611 5612 void ClassFileParser::clear_class_metadata() { 5613 // metadata created before the instance klass is created. Must be 5614 // deallocated if classfile parsing returns an error. 5615 _cp = NULL; 5616 _fields = NULL; 5617 _methods = NULL; 5618 _inner_classes = NULL; 5619 _local_interfaces = NULL; 5620 _transitive_interfaces = NULL; 5621 _combined_annotations = NULL; 5622 _annotations = _type_annotations = NULL; 5623 _fields_annotations = _fields_type_annotations = NULL; 5624 } 5625 5626 // Destructor to clean up 5627 ClassFileParser::~ClassFileParser() { 5628 if (_cp != NULL) { 5629 MetadataFactory::free_metadata(_loader_data, _cp); 5630 } 5631 if (_fields != NULL) { 5632 MetadataFactory::free_array<u2>(_loader_data, _fields); 5633 } 5634 5635 if (_methods != NULL) { 5636 // Free methods 5637 InstanceKlass::deallocate_methods(_loader_data, _methods); 5638 } 5639 5640 // beware of the Universe::empty_blah_array!! 5641 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5642 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5643 } 5644 5645 // Free interfaces 5646 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5647 _local_interfaces, _transitive_interfaces); 5648 5649 if (_combined_annotations != NULL) { 5650 // After all annotations arrays have been created, they are installed into the 5651 // Annotations object that will be assigned to the InstanceKlass being created. 5652 5653 // Deallocate the Annotations object and the installed annotations arrays. 5654 _combined_annotations->deallocate_contents(_loader_data); 5655 5656 // If the _combined_annotations pointer is non-NULL, 5657 // then the other annotations fields should have been cleared. 5658 assert(_annotations == NULL, "Should have been cleared"); 5659 assert(_type_annotations == NULL, "Should have been cleared"); 5660 assert(_fields_annotations == NULL, "Should have been cleared"); 5661 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5662 } else { 5663 // If the annotations arrays were not installed into the Annotations object, 5664 // then they have to be deallocated explicitly. 5665 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5666 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5667 Annotations::free_contents(_loader_data, _fields_annotations); 5668 Annotations::free_contents(_loader_data, _fields_type_annotations); 5669 } 5670 5671 clear_class_metadata(); 5672 5673 // deallocate the klass if already created. Don't directly deallocate, but add 5674 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5675 // at a safepoint. 5676 if (_klass_to_deallocate != NULL) { 5677 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5678 } 5679 } 5680 5681 void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5682 TRAPS) { 5683 5684 assert(stream != NULL, "invariant"); 5685 assert(_class_name != NULL, "invariant"); 5686 5687 // BEGIN STREAM PARSING 5688 stream->guarantee_more(8, CHECK); // magic, major, minor 5689 // Magic value 5690 const u4 magic = stream->get_u4_fast(); 5691 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5692 "Incompatible magic value %u in class file %s", 5693 magic, CHECK); 5694 5695 // Version numbers 5696 _minor_version = stream->get_u2_fast(); 5697 _major_version = stream->get_u2_fast(); 5698 5699 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5700 ResourceMark rm; 5701 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5702 _major_version, _minor_version, _class_name->as_C_string()); 5703 Exceptions::fthrow( 5704 THREAD_AND_LOCATION, 5705 vmSymbols::java_lang_UnsupportedClassVersionError(), 5706 "Unsupported major.minor version for dump time %u.%u", 5707 _major_version, 5708 _minor_version); 5709 } 5710 5711 // Check version numbers - we check this even with verifier off 5712 if (!is_supported_version(_major_version, _minor_version)) { 5713 ResourceMark rm(THREAD); 5714 Exceptions::fthrow( 5715 THREAD_AND_LOCATION, 5716 vmSymbols::java_lang_UnsupportedClassVersionError(), 5717 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5718 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5719 _class_name->as_C_string(), 5720 _major_version, 5721 _minor_version, 5722 JAVA_MAX_SUPPORTED_VERSION, 5723 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5724 return; 5725 } 5726 5727 stream->guarantee_more(3, CHECK); // length, first cp tag 5728 const u2 cp_size = stream->get_u2_fast(); 5729 5730 guarantee_property( 5731 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5732 cp_size, CHECK); 5733 5734 _cp = ConstantPool::allocate(_loader_data, 5735 cp_size, 5736 CHECK); 5737 5738 ConstantPool* const cp = _cp; 5739 5740 parse_constant_pool(stream, cp, cp_size, CHECK); 5741 5742 assert(cp_size == (const u2)cp->length(), "invariant"); 5743 5744 // ACCESS FLAGS 5745 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5746 5747 // Access flags 5748 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5749 5750 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5751 // Set abstract bit for old class files for backward compatibility 5752 flags |= JVM_ACC_ABSTRACT; 5753 } 5754 5755 _access_flags.set_flags(flags); 5756 5757 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK); 5758 5759 // This class and superclass 5760 _this_class_index = stream->get_u2_fast(); 5761 check_property( 5762 valid_cp_range(_this_class_index, cp_size) && 5763 cp->tag_at(_this_class_index).is_unresolved_klass(), 5764 "Invalid this class index %u in constant pool in class file %s", 5765 _this_class_index, CHECK); 5766 5767 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5768 assert(class_name_in_cp != NULL, "class_name can't be null"); 5769 5770 // Update _class_name which could be null previously 5771 // to reflect the name in the constant pool 5772 _class_name = class_name_in_cp; 5773 5774 // Don't need to check whether this class name is legal or not. 5775 // It has been checked when constant pool is parsed. 5776 // However, make sure it is not an array type. 5777 if (_need_verify) { 5778 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5779 "Bad class name in class file %s", 5780 CHECK); 5781 } 5782 5783 // Checks if name in class file matches requested name 5784 if (_requested_name != NULL && _requested_name != _class_name) { 5785 ResourceMark rm(THREAD); 5786 Exceptions::fthrow( 5787 THREAD_AND_LOCATION, 5788 vmSymbols::java_lang_NoClassDefFoundError(), 5789 "%s (wrong name: %s)", 5790 _class_name->as_C_string(), 5791 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5792 ); 5793 return; 5794 } 5795 5796 // if this is an anonymous class fix up its name if it's in the unnamed 5797 // package. Otherwise, throw IAE if it is in a different package than 5798 // its host class. 5799 if (_host_klass != NULL) { 5800 fix_anonymous_class_name(CHECK); 5801 } 5802 5803 // Verification prevents us from creating names with dots in them, this 5804 // asserts that that's the case. 5805 assert(is_internal_format(_class_name), "external class name format used internally"); 5806 5807 if (!is_internal()) { 5808 if (log_is_enabled(Debug, class, preorder)){ 5809 ResourceMark rm(THREAD); 5810 outputStream* log = Log(class, preorder)::debug_stream(); 5811 log->print("%s", _class_name->as_klass_external_name()); 5812 if (stream->source() != NULL) { 5813 log->print(" source: %s", stream->source()); 5814 } 5815 log->cr(); 5816 } 5817 5818 #if INCLUDE_CDS 5819 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5820 // Only dump the classes that can be stored into CDS archive. 5821 // Anonymous classes such as generated LambdaForm classes are also not included. 5822 if (SystemDictionaryShared::is_sharing_possible(_loader_data) && 5823 _host_klass == NULL) { 5824 oop class_loader = _loader_data->class_loader(); 5825 ResourceMark rm(THREAD); 5826 // For the boot and platform class loaders, check if the class is not found in the 5827 // java runtime image. Additional check for the boot class loader is if the class 5828 // is not found in the boot loader's appended entries. This indicates that the class 5829 // is not useable during run time, such as the ones found in the --patch-module entries, 5830 // so it should not be included in the classlist file. 5831 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) || 5832 SystemDictionary::is_platform_class_loader(class_loader)) && 5833 !ClassLoader::is_jrt(stream->source())) { 5834 tty->print_cr("skip writing class %s from source %s to classlist file", 5835 _class_name->as_C_string(), stream->source()); 5836 } else { 5837 classlist_file->print_cr("%s", _class_name->as_C_string()); 5838 classlist_file->flush(); 5839 } 5840 } 5841 } 5842 #endif 5843 } 5844 5845 // SUPERKLASS 5846 _super_class_index = stream->get_u2_fast(); 5847 _super_klass = parse_super_class(cp, 5848 _super_class_index, 5849 _need_verify, 5850 CHECK); 5851 5852 // Interfaces 5853 _itfs_len = stream->get_u2_fast(); 5854 parse_interfaces(stream, 5855 _itfs_len, 5856 cp, 5857 &_has_nonstatic_concrete_methods, 5858 CHECK); 5859 5860 assert(_local_interfaces != NULL, "invariant"); 5861 5862 // Fields (offsets are filled in later) 5863 _fac = new FieldAllocationCount(); 5864 parse_fields(stream, 5865 _access_flags.is_interface(), 5866 _fac, 5867 cp, 5868 cp_size, 5869 &_java_fields_count, 5870 CHECK); 5871 5872 assert(_fields != NULL, "invariant"); 5873 5874 // Methods 5875 AccessFlags promoted_flags; 5876 parse_methods(stream, 5877 _access_flags.is_interface(), 5878 &promoted_flags, 5879 &_has_final_method, 5880 &_declares_nonstatic_concrete_methods, 5881 CHECK); 5882 5883 assert(_methods != NULL, "invariant"); 5884 5885 // promote flags from parse_methods() to the klass' flags 5886 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5887 5888 if (_declares_nonstatic_concrete_methods) { 5889 _has_nonstatic_concrete_methods = true; 5890 } 5891 5892 // Additional attributes/annotations 5893 _parsed_annotations = new ClassAnnotationCollector(); 5894 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 5895 5896 assert(_inner_classes != NULL, "invariant"); 5897 5898 // Finalize the Annotations metadata object, 5899 // now that all annotation arrays have been created. 5900 create_combined_annotations(CHECK); 5901 5902 // Make sure this is the end of class file stream 5903 guarantee_property(stream->at_eos(), 5904 "Extra bytes at the end of class file %s", 5905 CHECK); 5906 5907 // all bytes in stream read and parsed 5908 } 5909 5910 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 5911 ConstantPool* cp, 5912 TRAPS) { 5913 assert(stream != NULL, "invariant"); 5914 assert(stream->at_eos(), "invariant"); 5915 assert(cp != NULL, "invariant"); 5916 assert(_loader_data != NULL, "invariant"); 5917 5918 if (_class_name == vmSymbols::java_lang_Object()) { 5919 check_property(_local_interfaces == Universe::the_empty_klass_array(), 5920 "java.lang.Object cannot implement an interface in class file %s", 5921 CHECK); 5922 } 5923 // We check super class after class file is parsed and format is checked 5924 if (_super_class_index > 0 && NULL ==_super_klass) { 5925 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 5926 if (_access_flags.is_interface()) { 5927 // Before attempting to resolve the superclass, check for class format 5928 // errors not checked yet. 5929 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 5930 "Interfaces must have java.lang.Object as superclass in class file %s", 5931 CHECK); 5932 } 5933 Handle loader(THREAD, _loader_data->class_loader()); 5934 _super_klass = (const InstanceKlass*) 5935 SystemDictionary::resolve_super_or_fail(_class_name, 5936 super_class_name, 5937 loader, 5938 _protection_domain, 5939 true, 5940 CHECK); 5941 } 5942 5943 if (_super_klass != NULL) { 5944 if (_super_klass->has_nonstatic_concrete_methods()) { 5945 _has_nonstatic_concrete_methods = true; 5946 } 5947 5948 if (_super_klass->is_interface()) { 5949 ResourceMark rm(THREAD); 5950 Exceptions::fthrow( 5951 THREAD_AND_LOCATION, 5952 vmSymbols::java_lang_IncompatibleClassChangeError(), 5953 "class %s has interface %s as super class", 5954 _class_name->as_klass_external_name(), 5955 _super_klass->external_name() 5956 ); 5957 return; 5958 } 5959 // Make sure super class is not final 5960 if (_super_klass->is_final()) { 5961 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 5962 } 5963 } 5964 5965 // Compute the transitive list of all unique interfaces implemented by this class 5966 _transitive_interfaces = 5967 compute_transitive_interfaces(_super_klass, 5968 _local_interfaces, 5969 _loader_data, 5970 CHECK); 5971 5972 assert(_transitive_interfaces != NULL, "invariant"); 5973 5974 // sort methods 5975 _method_ordering = sort_methods(_methods); 5976 5977 _all_mirandas = new GrowableArray<Method*>(20); 5978 5979 Handle loader(THREAD, _loader_data->class_loader()); 5980 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 5981 &_num_miranda_methods, 5982 _all_mirandas, 5983 _super_klass, 5984 _methods, 5985 _access_flags, 5986 _major_version, 5987 loader, 5988 _class_name, 5989 _local_interfaces, 5990 CHECK); 5991 5992 // Size of Java itable (in words) 5993 _itable_size = _access_flags.is_interface() ? 0 : 5994 klassItable::compute_itable_size(_transitive_interfaces); 5995 5996 assert(_fac != NULL, "invariant"); 5997 assert(_parsed_annotations != NULL, "invariant"); 5998 5999 _field_info = new FieldLayoutInfo(); 6000 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 6001 6002 // Compute reference typ 6003 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 6004 6005 } 6006 6007 void ClassFileParser::set_klass(InstanceKlass* klass) { 6008 6009 #ifdef ASSERT 6010 if (klass != NULL) { 6011 assert(NULL == _klass, "leaking?"); 6012 } 6013 #endif 6014 6015 _klass = klass; 6016 } 6017 6018 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 6019 6020 #ifdef ASSERT 6021 if (klass != NULL) { 6022 assert(NULL == _klass_to_deallocate, "leaking?"); 6023 } 6024 #endif 6025 6026 _klass_to_deallocate = klass; 6027 } 6028 6029 // Caller responsible for ResourceMark 6030 // clone stream with rewound position 6031 const ClassFileStream* ClassFileParser::clone_stream() const { 6032 assert(_stream != NULL, "invariant"); 6033 6034 return _stream->clone(); 6035 } 6036 // ---------------------------------------------------------------------------- 6037 // debugging 6038 6039 #ifdef ASSERT 6040 6041 // return true if class_name contains no '.' (internal format is '/') 6042 bool ClassFileParser::is_internal_format(Symbol* class_name) { 6043 if (class_name != NULL) { 6044 ResourceMark rm; 6045 char* name = class_name->as_C_string(); 6046 return strchr(name, '.') == NULL; 6047 } else { 6048 return true; 6049 } 6050 } 6051 6052 #endif --- EOF ---