classFileParser.cpp revision 9737:e286c9ccd58d
1/* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24#include "precompiled.hpp" 25#include "classfile/classFileParser.hpp" 26#include "classfile/classFileStream.hpp" 27#include "classfile/classLoader.hpp" 28#include "classfile/classLoaderData.inline.hpp" 29#include "classfile/defaultMethods.hpp" 30#include "classfile/javaClasses.inline.hpp" 31#include "classfile/symbolTable.hpp" 32#include "classfile/systemDictionary.hpp" 33#include "classfile/verificationType.hpp" 34#include "classfile/verifier.hpp" 35#include "classfile/vmSymbols.hpp" 36#include "gc/shared/gcLocker.hpp" 37#include "memory/allocation.hpp" 38#include "memory/metadataFactory.hpp" 39#include "memory/oopFactory.hpp" 40#include "memory/resourceArea.hpp" 41#include "memory/universe.inline.hpp" 42#include "oops/annotations.hpp" 43#include "oops/fieldStreams.hpp" 44#include "oops/instanceKlass.hpp" 45#include "oops/instanceMirrorKlass.hpp" 46#include "oops/klass.inline.hpp" 47#include "oops/klassVtable.hpp" 48#include "oops/metadata.hpp" 49#include "oops/method.hpp" 50#include "oops/oop.inline.hpp" 51#include "oops/symbol.hpp" 52#include "prims/jvm.h" 53#include "prims/jvmtiExport.hpp" 54#include "prims/jvmtiThreadState.hpp" 55#include "runtime/javaCalls.hpp" 56#include "runtime/perfData.hpp" 57#include "runtime/reflection.hpp" 58#include "runtime/signature.hpp" 59#include "runtime/timer.hpp" 60#include "services/classLoadingService.hpp" 61#include "services/threadService.hpp" 62#include "trace/traceMacros.hpp" 63#include "utilities/array.hpp" 64#include "utilities/exceptions.hpp" 65#include "utilities/globalDefinitions.hpp" 66#include "utilities/macros.hpp" 67#include "utilities/ostream.hpp" 68#include "utilities/resourceHash.hpp" 69#if INCLUDE_CDS 70#include "classfile/systemDictionaryShared.hpp" 71#endif 72 73// We generally try to create the oops directly when parsing, rather than 74// allocating temporary data structures and copying the bytes twice. A 75// temporary area is only needed when parsing utf8 entries in the constant 76// pool and when parsing line number tables. 77 78// We add assert in debug mode when class format is not checked. 79 80#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 81#define JAVA_MIN_SUPPORTED_VERSION 45 82#define JAVA_MAX_SUPPORTED_VERSION 52 83#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 84 85// Used for two backward compatibility reasons: 86// - to check for new additions to the class file format in JDK1.5 87// - to check for bug fixes in the format checker in JDK1.5 88#define JAVA_1_5_VERSION 49 89 90// Used for backward compatibility reasons: 91// - to check for javac bug fixes that happened after 1.5 92// - also used as the max version when running in jdk6 93#define JAVA_6_VERSION 50 94 95// Used for backward compatibility reasons: 96// - to check NameAndType_info signatures more aggressively 97// - to disallow argument and require ACC_STATIC for <clinit> methods 98#define JAVA_7_VERSION 51 99 100// Extension method support. 101#define JAVA_8_VERSION 52 102 103enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names 104 105void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 106 ConstantPool* cp, 107 const int length, 108 TRAPS) { 109 assert(stream != NULL, "invariant"); 110 assert(cp != NULL, "invariant"); 111 112 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 113 // this function (_current can be allocated in a register, with scalar 114 // replacement of aggregates). The _current pointer is copied back to 115 // stream() when this function returns. DON'T call another method within 116 // this method that uses stream(). 117 const ClassFileStream cfs1 = *stream; 118 const ClassFileStream* const cfs = &cfs1; 119 120 assert(cfs->allocated_on_stack(), "should be local"); 121 debug_only(const u1* const old_current = stream->current();) 122 123 // Used for batching symbol allocations. 124 const char* names[SymbolTable::symbol_alloc_batch_size]; 125 int lengths[SymbolTable::symbol_alloc_batch_size]; 126 int indices[SymbolTable::symbol_alloc_batch_size]; 127 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 128 int names_count = 0; 129 130 // parsing Index 0 is unused 131 for (int index = 1; index < length; index++) { 132 // Each of the following case guarantees one more byte in the stream 133 // for the following tag or the access_flags following constant pool, 134 // so we don't need bounds-check for reading tag. 135 const u1 tag = cfs->get_u1_fast(); 136 switch (tag) { 137 case JVM_CONSTANT_Class : { 138 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 139 const u2 name_index = cfs->get_u2_fast(); 140 cp->klass_index_at_put(index, name_index); 141 break; 142 } 143 case JVM_CONSTANT_Fieldref: { 144 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 145 const u2 class_index = cfs->get_u2_fast(); 146 const u2 name_and_type_index = cfs->get_u2_fast(); 147 cp->field_at_put(index, class_index, name_and_type_index); 148 break; 149 } 150 case JVM_CONSTANT_Methodref: { 151 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 152 const u2 class_index = cfs->get_u2_fast(); 153 const u2 name_and_type_index = cfs->get_u2_fast(); 154 cp->method_at_put(index, class_index, name_and_type_index); 155 break; 156 } 157 case JVM_CONSTANT_InterfaceMethodref: { 158 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 159 const u2 class_index = cfs->get_u2_fast(); 160 const u2 name_and_type_index = cfs->get_u2_fast(); 161 cp->interface_method_at_put(index, class_index, name_and_type_index); 162 break; 163 } 164 case JVM_CONSTANT_String : { 165 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 166 const u2 string_index = cfs->get_u2_fast(); 167 cp->string_index_at_put(index, string_index); 168 break; 169 } 170 case JVM_CONSTANT_MethodHandle : 171 case JVM_CONSTANT_MethodType: { 172 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 173 classfile_parse_error( 174 "Class file version does not support constant tag %u in class file %s", 175 tag, CHECK); 176 } 177 if (tag == JVM_CONSTANT_MethodHandle) { 178 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 179 const u1 ref_kind = cfs->get_u1_fast(); 180 const u2 method_index = cfs->get_u2_fast(); 181 cp->method_handle_index_at_put(index, ref_kind, method_index); 182 } 183 else if (tag == JVM_CONSTANT_MethodType) { 184 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 185 const u2 signature_index = cfs->get_u2_fast(); 186 cp->method_type_index_at_put(index, signature_index); 187 } 188 else { 189 ShouldNotReachHere(); 190 } 191 break; 192 } 193 case JVM_CONSTANT_InvokeDynamic : { 194 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 195 classfile_parse_error( 196 "Class file version does not support constant tag %u in class file %s", 197 tag, CHECK); 198 } 199 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 200 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 201 const u2 name_and_type_index = cfs->get_u2_fast(); 202 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 203 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 204 } 205 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 206 break; 207 } 208 case JVM_CONSTANT_Integer: { 209 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 210 const u4 bytes = cfs->get_u4_fast(); 211 cp->int_at_put(index, (jint)bytes); 212 break; 213 } 214 case JVM_CONSTANT_Float: { 215 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 216 const u4 bytes = cfs->get_u4_fast(); 217 cp->float_at_put(index, *(jfloat*)&bytes); 218 break; 219 } 220 case JVM_CONSTANT_Long: { 221 // A mangled type might cause you to overrun allocated memory 222 guarantee_property(index + 1 < length, 223 "Invalid constant pool entry %u in class file %s", 224 index, 225 CHECK); 226 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 227 const u8 bytes = cfs->get_u8_fast(); 228 cp->long_at_put(index, bytes); 229 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 230 break; 231 } 232 case JVM_CONSTANT_Double: { 233 // A mangled type might cause you to overrun allocated memory 234 guarantee_property(index+1 < length, 235 "Invalid constant pool entry %u in class file %s", 236 index, 237 CHECK); 238 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 239 const u8 bytes = cfs->get_u8_fast(); 240 cp->double_at_put(index, *(jdouble*)&bytes); 241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 242 break; 243 } 244 case JVM_CONSTANT_NameAndType: { 245 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 246 const u2 name_index = cfs->get_u2_fast(); 247 const u2 signature_index = cfs->get_u2_fast(); 248 cp->name_and_type_at_put(index, name_index, signature_index); 249 break; 250 } 251 case JVM_CONSTANT_Utf8 : { 252 cfs->guarantee_more(2, CHECK); // utf8_length 253 u2 utf8_length = cfs->get_u2_fast(); 254 const u1* utf8_buffer = cfs->get_u1_buffer(); 255 assert(utf8_buffer != NULL, "null utf8 buffer"); 256 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 257 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 258 cfs->skip_u1_fast(utf8_length); 259 260 // Before storing the symbol, make sure it's legal 261 if (_need_verify) { 262 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 263 } 264 265 if (has_cp_patch_at(index)) { 266 Handle patch = clear_cp_patch_at(index); 267 guarantee_property(java_lang_String::is_instance(patch()), 268 "Illegal utf8 patch at %d in class file %s", 269 index, 270 CHECK); 271 const char* const str = java_lang_String::as_utf8_string(patch()); 272 // (could use java_lang_String::as_symbol instead, but might as well batch them) 273 utf8_buffer = (const u1*) str; 274 utf8_length = (int) strlen(str); 275 } 276 277 unsigned int hash; 278 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 279 utf8_length, 280 hash); 281 if (result == NULL) { 282 names[names_count] = (const char*)utf8_buffer; 283 lengths[names_count] = utf8_length; 284 indices[names_count] = index; 285 hashValues[names_count++] = hash; 286 if (names_count == SymbolTable::symbol_alloc_batch_size) { 287 SymbolTable::new_symbols(_loader_data, 288 cp, 289 names_count, 290 names, 291 lengths, 292 indices, 293 hashValues, 294 CHECK); 295 names_count = 0; 296 } 297 } else { 298 cp->symbol_at_put(index, result); 299 } 300 break; 301 } 302 default: { 303 classfile_parse_error("Unknown constant tag %u in class file %s", 304 tag, 305 CHECK); 306 break; 307 } 308 } // end of switch(tag) 309 } // end of for 310 311 // Allocate the remaining symbols 312 if (names_count > 0) { 313 SymbolTable::new_symbols(_loader_data, 314 cp, 315 names_count, 316 names, 317 lengths, 318 indices, 319 hashValues, 320 CHECK); 321 } 322 323 // Copy _current pointer of local copy back to stream. 324 assert(stream->current() == old_current, "non-exclusive use of stream"); 325 stream->set_current(cfs1.current()); 326 327} 328 329static inline bool valid_cp_range(int index, int length) { 330 return (index > 0 && index < length); 331} 332 333static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 334 assert(cp != NULL, "invariant"); 335 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 336 return cp->symbol_at(index); 337 } 338 return NULL; 339} 340 341#ifdef ASSERT 342PRAGMA_DIAG_PUSH 343PRAGMA_FORMAT_NONLITERAL_IGNORED 344void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 345 ResourceMark rm(THREAD); 346 fatal(msg, _class_name->as_C_string()); 347} 348 349void ClassFileParser::report_assert_property_failure(const char* msg, 350 int index, 351 TRAPS) const { 352 ResourceMark rm(THREAD); 353 fatal(msg, index, _class_name->as_C_string()); 354} 355PRAGMA_DIAG_POP 356#endif 357 358void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 359 ConstantPool* const cp, 360 const int length, 361 TRAPS) { 362 assert(cp != NULL, "invariant"); 363 assert(stream != NULL, "invariant"); 364 365 // parsing constant pool entries 366 parse_constant_pool_entries(stream, cp, length, CHECK); 367 368 int index = 1; // declared outside of loops for portability 369 370 // first verification pass - validate cross references 371 // and fixup class and string constants 372 for (index = 1; index < length; index++) { // Index 0 is unused 373 const jbyte tag = cp->tag_at(index).value(); 374 switch (tag) { 375 case JVM_CONSTANT_Class: { 376 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 377 break; 378 } 379 case JVM_CONSTANT_Fieldref: 380 // fall through 381 case JVM_CONSTANT_Methodref: 382 // fall through 383 case JVM_CONSTANT_InterfaceMethodref: { 384 if (!_need_verify) break; 385 const int klass_ref_index = cp->klass_ref_index_at(index); 386 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 387 check_property(valid_klass_reference_at(klass_ref_index), 388 "Invalid constant pool index %u in class file %s", 389 klass_ref_index, CHECK); 390 check_property(valid_cp_range(name_and_type_ref_index, length) && 391 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 392 "Invalid constant pool index %u in class file %s", 393 name_and_type_ref_index, CHECK); 394 break; 395 } 396 case JVM_CONSTANT_String: { 397 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 398 break; 399 } 400 case JVM_CONSTANT_Integer: 401 break; 402 case JVM_CONSTANT_Float: 403 break; 404 case JVM_CONSTANT_Long: 405 case JVM_CONSTANT_Double: { 406 index++; 407 check_property( 408 (index < length && cp->tag_at(index).is_invalid()), 409 "Improper constant pool long/double index %u in class file %s", 410 index, CHECK); 411 break; 412 } 413 case JVM_CONSTANT_NameAndType: { 414 if (!_need_verify) break; 415 const int name_ref_index = cp->name_ref_index_at(index); 416 const int signature_ref_index = cp->signature_ref_index_at(index); 417 check_property(valid_symbol_at(name_ref_index), 418 "Invalid constant pool index %u in class file %s", 419 name_ref_index, CHECK); 420 check_property(valid_symbol_at(signature_ref_index), 421 "Invalid constant pool index %u in class file %s", 422 signature_ref_index, CHECK); 423 break; 424 } 425 case JVM_CONSTANT_Utf8: 426 break; 427 case JVM_CONSTANT_UnresolvedClass: // fall-through 428 case JVM_CONSTANT_UnresolvedClassInError: { 429 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 430 break; 431 } 432 case JVM_CONSTANT_ClassIndex: { 433 const int class_index = cp->klass_index_at(index); 434 check_property(valid_symbol_at(class_index), 435 "Invalid constant pool index %u in class file %s", 436 class_index, CHECK); 437 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); 438 break; 439 } 440 case JVM_CONSTANT_StringIndex: { 441 const int string_index = cp->string_index_at(index); 442 check_property(valid_symbol_at(string_index), 443 "Invalid constant pool index %u in class file %s", 444 string_index, CHECK); 445 Symbol* const sym = cp->symbol_at(string_index); 446 cp->unresolved_string_at_put(index, sym); 447 break; 448 } 449 case JVM_CONSTANT_MethodHandle: { 450 const int ref_index = cp->method_handle_index_at(index); 451 check_property(valid_cp_range(ref_index, length), 452 "Invalid constant pool index %u in class file %s", 453 ref_index, CHECK); 454 const constantTag tag = cp->tag_at(ref_index); 455 const int ref_kind = cp->method_handle_ref_kind_at(index); 456 457 switch (ref_kind) { 458 case JVM_REF_getField: 459 case JVM_REF_getStatic: 460 case JVM_REF_putField: 461 case JVM_REF_putStatic: { 462 check_property( 463 tag.is_field(), 464 "Invalid constant pool index %u in class file %s (not a field)", 465 ref_index, CHECK); 466 break; 467 } 468 case JVM_REF_invokeVirtual: 469 case JVM_REF_newInvokeSpecial: { 470 check_property( 471 tag.is_method(), 472 "Invalid constant pool index %u in class file %s (not a method)", 473 ref_index, CHECK); 474 break; 475 } 476 case JVM_REF_invokeStatic: 477 case JVM_REF_invokeSpecial: { 478 check_property( 479 tag.is_method() || 480 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 481 "Invalid constant pool index %u in class file %s (not a method)", 482 ref_index, CHECK); 483 break; 484 } 485 case JVM_REF_invokeInterface: { 486 check_property( 487 tag.is_interface_method(), 488 "Invalid constant pool index %u in class file %s (not an interface method)", 489 ref_index, CHECK); 490 break; 491 } 492 default: { 493 classfile_parse_error( 494 "Bad method handle kind at constant pool index %u in class file %s", 495 index, CHECK); 496 } 497 } // switch(refkind) 498 // Keep the ref_index unchanged. It will be indirected at link-time. 499 break; 500 } // case MethodHandle 501 case JVM_CONSTANT_MethodType: { 502 const int ref_index = cp->method_type_index_at(index); 503 check_property(valid_symbol_at(ref_index), 504 "Invalid constant pool index %u in class file %s", 505 ref_index, CHECK); 506 break; 507 } 508 case JVM_CONSTANT_InvokeDynamic: { 509 const int name_and_type_ref_index = 510 cp->invoke_dynamic_name_and_type_ref_index_at(index); 511 512 check_property(valid_cp_range(name_and_type_ref_index, length) && 513 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 514 "Invalid constant pool index %u in class file %s", 515 name_and_type_ref_index, CHECK); 516 // bootstrap specifier index must be checked later, 517 // when BootstrapMethods attr is available 518 break; 519 } 520 default: { 521 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 522 ShouldNotReachHere(); 523 break; 524 } 525 } // switch(tag) 526 } // end of for 527 528 if (_cp_patches != NULL) { 529 // need to treat this_class specially... 530 int this_class_index; 531 { 532 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 533 const u1* const mark = stream->current(); 534 stream->skip_u2_fast(1); // skip flags 535 this_class_index = stream->get_u2_fast(); 536 stream->set_current(mark); // revert to mark 537 } 538 539 for (index = 1; index < length; index++) { // Index 0 is unused 540 if (has_cp_patch_at(index)) { 541 guarantee_property(index != this_class_index, 542 "Illegal constant pool patch to self at %d in class file %s", 543 index, CHECK); 544 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 545 } 546 } 547 } 548 549 if (!_need_verify) { 550 return; 551 } 552 553 // second verification pass - checks the strings are of the right format. 554 // but not yet to the other entries 555 for (index = 1; index < length; index++) { 556 const jbyte tag = cp->tag_at(index).value(); 557 switch (tag) { 558 case JVM_CONSTANT_UnresolvedClass: { 559 const Symbol* const class_name = cp->klass_name_at(index); 560 // check the name, even if _cp_patches will overwrite it 561 verify_legal_class_name(class_name, CHECK); 562 break; 563 } 564 case JVM_CONSTANT_NameAndType: { 565 if (_need_verify && _major_version >= JAVA_7_VERSION) { 566 const int sig_index = cp->signature_ref_index_at(index); 567 const int name_index = cp->name_ref_index_at(index); 568 const Symbol* const name = cp->symbol_at(name_index); 569 const Symbol* const sig = cp->symbol_at(sig_index); 570 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 571 verify_legal_method_signature(name, sig, CHECK); 572 } else { 573 verify_legal_field_signature(name, sig, CHECK); 574 } 575 } 576 break; 577 } 578 case JVM_CONSTANT_InvokeDynamic: 579 case JVM_CONSTANT_Fieldref: 580 case JVM_CONSTANT_Methodref: 581 case JVM_CONSTANT_InterfaceMethodref: { 582 const int name_and_type_ref_index = 583 cp->name_and_type_ref_index_at(index); 584 // already verified to be utf8 585 const int name_ref_index = 586 cp->name_ref_index_at(name_and_type_ref_index); 587 // already verified to be utf8 588 const int signature_ref_index = 589 cp->signature_ref_index_at(name_and_type_ref_index); 590 const Symbol* const name = cp->symbol_at(name_ref_index); 591 const Symbol* const signature = cp->symbol_at(signature_ref_index); 592 if (tag == JVM_CONSTANT_Fieldref) { 593 verify_legal_field_name(name, CHECK); 594 if (_need_verify && _major_version >= JAVA_7_VERSION) { 595 // Signature is verified above, when iterating NameAndType_info. 596 // Need only to be sure it's the right type. 597 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 598 throwIllegalSignature( 599 "Field", name, signature, CHECK); 600 } 601 } else { 602 verify_legal_field_signature(name, signature, CHECK); 603 } 604 } else { 605 verify_legal_method_name(name, CHECK); 606 if (_need_verify && _major_version >= JAVA_7_VERSION) { 607 // Signature is verified above, when iterating NameAndType_info. 608 // Need only to be sure it's the right type. 609 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 610 throwIllegalSignature( 611 "Method", name, signature, CHECK); 612 } 613 } else { 614 verify_legal_method_signature(name, signature, CHECK); 615 } 616 if (tag == JVM_CONSTANT_Methodref) { 617 // 4509014: If a class method name begins with '<', it must be "<init>". 618 assert(name != NULL, "method name in constant pool is null"); 619 const unsigned int name_len = name->utf8_length(); 620 assert(name_len > 0, "bad method name"); // already verified as legal name 621 if (name->byte_at(0) == '<') { 622 if (name != vmSymbols::object_initializer_name()) { 623 classfile_parse_error( 624 "Bad method name at constant pool index %u in class file %s", 625 name_ref_index, CHECK); 626 } 627 } 628 } 629 } 630 break; 631 } 632 case JVM_CONSTANT_MethodHandle: { 633 const int ref_index = cp->method_handle_index_at(index); 634 const int ref_kind = cp->method_handle_ref_kind_at(index); 635 switch (ref_kind) { 636 case JVM_REF_invokeVirtual: 637 case JVM_REF_invokeStatic: 638 case JVM_REF_invokeSpecial: 639 case JVM_REF_newInvokeSpecial: { 640 const int name_and_type_ref_index = 641 cp->name_and_type_ref_index_at(ref_index); 642 const int name_ref_index = 643 cp->name_ref_index_at(name_and_type_ref_index); 644 const Symbol* const name = cp->symbol_at(name_ref_index); 645 if (ref_kind == JVM_REF_newInvokeSpecial) { 646 if (name != vmSymbols::object_initializer_name()) { 647 classfile_parse_error( 648 "Bad constructor name at constant pool index %u in class file %s", 649 name_ref_index, CHECK); 650 } 651 } else { 652 if (name == vmSymbols::object_initializer_name()) { 653 classfile_parse_error( 654 "Bad method name at constant pool index %u in class file %s", 655 name_ref_index, CHECK); 656 } 657 } 658 break; 659 } 660 // Other ref_kinds are already fully checked in previous pass. 661 } // switch(ref_kind) 662 break; 663 } 664 case JVM_CONSTANT_MethodType: { 665 const Symbol* const no_name = vmSymbols::type_name(); // place holder 666 const Symbol* const signature = cp->method_type_signature_at(index); 667 verify_legal_method_signature(no_name, signature, CHECK); 668 break; 669 } 670 case JVM_CONSTANT_Utf8: { 671 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 672 } 673 } // switch(tag) 674 } // end of for 675} 676 677void ClassFileParser::patch_constant_pool(ConstantPool* cp, 678 int index, 679 Handle patch, 680 TRAPS) { 681 assert(cp != NULL, "invariant"); 682 683 BasicType patch_type = T_VOID; 684 685 switch (cp->tag_at(index).value()) { 686 687 case JVM_CONSTANT_UnresolvedClass: { 688 // Patching a class means pre-resolving it. 689 // The name in the constant pool is ignored. 690 if (java_lang_Class::is_instance(patch())) { 691 guarantee_property(!java_lang_Class::is_primitive(patch()), 692 "Illegal class patch at %d in class file %s", 693 index, CHECK); 694 cp->klass_at_put(index, java_lang_Class::as_Klass(patch())); 695 } else { 696 guarantee_property(java_lang_String::is_instance(patch()), 697 "Illegal class patch at %d in class file %s", 698 index, CHECK); 699 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 700 cp->unresolved_klass_at_put(index, name); 701 } 702 break; 703 } 704 705 case JVM_CONSTANT_String: { 706 // skip this patch and don't clear it. Needs the oop array for resolved 707 // references to be created first. 708 return; 709 } 710 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 711 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 712 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 713 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 714 patch_prim: 715 { 716 jvalue value; 717 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 718 guarantee_property(value_type == patch_type, 719 "Illegal primitive patch at %d in class file %s", 720 index, CHECK); 721 switch (value_type) { 722 case T_INT: cp->int_at_put(index, value.i); break; 723 case T_FLOAT: cp->float_at_put(index, value.f); break; 724 case T_LONG: cp->long_at_put(index, value.j); break; 725 case T_DOUBLE: cp->double_at_put(index, value.d); break; 726 default: assert(false, ""); 727 } 728 } // end patch_prim label 729 break; 730 731 default: { 732 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 733 guarantee_property(!has_cp_patch_at(index), 734 "Illegal unexpected patch at %d in class file %s", 735 index, CHECK); 736 return; 737 } 738 } // end of switch(tag) 739 740 // On fall-through, mark the patch as used. 741 clear_cp_patch_at(index); 742} 743class NameSigHash: public ResourceObj { 744 public: 745 const Symbol* _name; // name 746 const Symbol* _sig; // signature 747 NameSigHash* _next; // Next entry in hash table 748}; 749 750static const int HASH_ROW_SIZE = 256; 751 752static unsigned int hash(const Symbol* name, const Symbol* sig) { 753 unsigned int raw_hash = 0; 754 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 755 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 756 757 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 758} 759 760 761static void initialize_hashtable(NameSigHash** table) { 762 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 763} 764// Return false if the name/sig combination is found in table. 765// Return true if no duplicate is found. And name/sig is added as a new entry in table. 766// The old format checker uses heap sort to find duplicates. 767// NOTE: caller should guarantee that GC doesn't happen during the life cycle 768// of table since we don't expect Symbol*'s to move. 769static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 770 assert(name != NULL, "name in constant pool is NULL"); 771 772 // First lookup for duplicates 773 int index = hash(name, sig); 774 NameSigHash* entry = table[index]; 775 while (entry != NULL) { 776 if (entry->_name == name && entry->_sig == sig) { 777 return false; 778 } 779 entry = entry->_next; 780 } 781 782 // No duplicate is found, allocate a new entry and fill it. 783 entry = new NameSigHash(); 784 entry->_name = name; 785 entry->_sig = sig; 786 787 // Insert into hash table 788 entry->_next = table[index]; 789 table[index] = entry; 790 791 return true; 792} 793 794// Side-effects: populates the _local_interfaces field 795void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 796 const int itfs_len, 797 ConstantPool* const cp, 798 bool* const has_default_methods, 799 TRAPS) { 800 assert(stream != NULL, "invariant"); 801 assert(cp != NULL, "invariant"); 802 assert(has_default_methods != NULL, "invariant"); 803 804 if (itfs_len == 0) { 805 _local_interfaces = Universe::the_empty_klass_array(); 806 } else { 807 assert(itfs_len > 0, "only called for len>0"); 808 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 809 810 int index; 811 for (index = 0; index < itfs_len; index++) { 812 const u2 interface_index = stream->get_u2(CHECK); 813 KlassHandle interf; 814 check_property( 815 valid_klass_reference_at(interface_index), 816 "Interface name has bad constant pool index %u in class file %s", 817 interface_index, CHECK); 818 if (cp->tag_at(interface_index).is_klass()) { 819 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); 820 } else { 821 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 822 823 // Don't need to check legal name because it's checked when parsing constant pool. 824 // But need to make sure it's not an array type. 825 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 826 "Bad interface name in class file %s", CHECK); 827 828 // Call resolve_super so classcircularity is checked 829 const Klass* const k = 830 SystemDictionary::resolve_super_or_fail(_class_name, 831 unresolved_klass, 832 _loader_data->class_loader(), 833 _protection_domain, 834 false, 835 CHECK); 836 interf = KlassHandle(THREAD, k); 837 } 838 839 if (!interf()->is_interface()) { 840 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 841 "Implementing class"); 842 } 843 844 if (InstanceKlass::cast(interf())->has_default_methods()) { 845 *has_default_methods = true; 846 } 847 _local_interfaces->at_put(index, interf()); 848 } 849 850 if (!_need_verify || itfs_len <= 1) { 851 return; 852 } 853 854 // Check if there's any duplicates in interfaces 855 ResourceMark rm(THREAD); 856 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 857 NameSigHash*, 858 HASH_ROW_SIZE); 859 initialize_hashtable(interface_names); 860 bool dup = false; 861 { 862 debug_only(No_Safepoint_Verifier nsv;) 863 for (index = 0; index < itfs_len; index++) { 864 const Klass* const k = _local_interfaces->at(index); 865 const Symbol* const name = InstanceKlass::cast(k)->name(); 866 // If no duplicates, add (name, NULL) in hashtable interface_names. 867 if (!put_after_lookup(name, NULL, interface_names)) { 868 dup = true; 869 break; 870 } 871 } 872 } 873 if (dup) { 874 classfile_parse_error("Duplicate interface name in class file %s", CHECK); 875 } 876 } 877} 878 879void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 880 int constantvalue_index, 881 int signature_index, 882 TRAPS) const { 883 // Make sure the constant pool entry is of a type appropriate to this field 884 guarantee_property( 885 (constantvalue_index > 0 && 886 constantvalue_index < cp->length()), 887 "Bad initial value index %u in ConstantValue attribute in class file %s", 888 constantvalue_index, CHECK); 889 890 const constantTag value_type = cp->tag_at(constantvalue_index); 891 switch(cp->basic_type_for_signature_at(signature_index)) { 892 case T_LONG: { 893 guarantee_property(value_type.is_long(), 894 "Inconsistent constant value type in class file %s", 895 CHECK); 896 break; 897 } 898 case T_FLOAT: { 899 guarantee_property(value_type.is_float(), 900 "Inconsistent constant value type in class file %s", 901 CHECK); 902 break; 903 } 904 case T_DOUBLE: { 905 guarantee_property(value_type.is_double(), 906 "Inconsistent constant value type in class file %s", 907 CHECK); 908 break; 909 } 910 case T_BYTE: 911 case T_CHAR: 912 case T_SHORT: 913 case T_BOOLEAN: 914 case T_INT: { 915 guarantee_property(value_type.is_int(), 916 "Inconsistent constant value type in class file %s", 917 CHECK); 918 break; 919 } 920 case T_OBJECT: { 921 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 922 && value_type.is_string()), 923 "Bad string initial value in class file %s", 924 CHECK); 925 break; 926 } 927 default: { 928 classfile_parse_error("Unable to set initial value %u in class file %s", 929 constantvalue_index, 930 CHECK); 931 } 932 } 933} 934 935class AnnotationCollector : public ResourceObj{ 936public: 937 enum Location { _in_field, _in_method, _in_class }; 938 enum ID { 939 _unknown = 0, 940 _method_CallerSensitive, 941 _method_ForceInline, 942 _method_DontInline, 943 _method_InjectedProfile, 944 _method_LambdaForm_Compiled, 945 _method_LambdaForm_Hidden, 946 _method_HotSpotIntrinsicCandidate, 947 _jdk_internal_vm_annotation_Contended, 948 _field_Stable, 949 _jdk_internal_vm_annotation_ReservedStackAccess, 950 _annotation_LIMIT 951 }; 952 const Location _location; 953 int _annotations_present; 954 u2 _contended_group; 955 956 AnnotationCollector(Location location) 957 : _location(location), _annotations_present(0) 958 { 959 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 960 } 961 // If this annotation name has an ID, report it (or _none). 962 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 963 // Set the annotation name: 964 void set_annotation(ID id) { 965 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 966 _annotations_present |= nth_bit((int)id); 967 } 968 969 void remove_annotation(ID id) { 970 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 971 _annotations_present &= ~nth_bit((int)id); 972 } 973 974 // Report if the annotation is present. 975 bool has_any_annotations() const { return _annotations_present != 0; } 976 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 977 978 void set_contended_group(u2 group) { _contended_group = group; } 979 u2 contended_group() const { return _contended_group; } 980 981 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 982 983 void set_stable(bool stable) { set_annotation(_field_Stable); } 984 bool is_stable() const { return has_annotation(_field_Stable); } 985}; 986 987// This class also doubles as a holder for metadata cleanup. 988class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 989private: 990 ClassLoaderData* _loader_data; 991 AnnotationArray* _field_annotations; 992 AnnotationArray* _field_type_annotations; 993public: 994 FieldAnnotationCollector(ClassLoaderData* loader_data) : 995 AnnotationCollector(_in_field), 996 _loader_data(loader_data), 997 _field_annotations(NULL), 998 _field_type_annotations(NULL) {} 999 ~FieldAnnotationCollector(); 1000 void apply_to(FieldInfo* f); 1001 AnnotationArray* field_annotations() { return _field_annotations; } 1002 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1003 1004 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1005 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1006}; 1007 1008class MethodAnnotationCollector : public AnnotationCollector{ 1009public: 1010 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1011 void apply_to(methodHandle m); 1012}; 1013 1014class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1015public: 1016 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1017 void apply_to(InstanceKlass* ik); 1018}; 1019 1020 1021static int skip_annotation_value(const u1*, int, int); // fwd decl 1022 1023// Skip an annotation. Return >=limit if there is any problem. 1024static int skip_annotation(const u1* buffer, int limit, int index) { 1025 assert(buffer != NULL, "invariant"); 1026 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1027 // value := switch (tag:u1) { ... } 1028 index += 2; // skip atype 1029 if ((index += 2) >= limit) return limit; // read nmem 1030 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1031 while (--nmem >= 0 && index < limit) { 1032 index += 2; // skip member 1033 index = skip_annotation_value(buffer, limit, index); 1034 } 1035 return index; 1036} 1037 1038// Skip an annotation value. Return >=limit if there is any problem. 1039static int skip_annotation_value(const u1* buffer, int limit, int index) { 1040 assert(buffer != NULL, "invariant"); 1041 1042 // value := switch (tag:u1) { 1043 // case B, C, I, S, Z, D, F, J, c: con:u2; 1044 // case e: e_class:u2 e_name:u2; 1045 // case s: s_con:u2; 1046 // case [: do(nval:u2) {value}; 1047 // case @: annotation; 1048 // case s: s_con:u2; 1049 // } 1050 if ((index += 1) >= limit) return limit; // read tag 1051 const u1 tag = buffer[index - 1]; 1052 switch (tag) { 1053 case 'B': 1054 case 'C': 1055 case 'I': 1056 case 'S': 1057 case 'Z': 1058 case 'D': 1059 case 'F': 1060 case 'J': 1061 case 'c': 1062 case 's': 1063 index += 2; // skip con or s_con 1064 break; 1065 case 'e': 1066 index += 4; // skip e_class, e_name 1067 break; 1068 case '[': 1069 { 1070 if ((index += 2) >= limit) return limit; // read nval 1071 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1072 while (--nval >= 0 && index < limit) { 1073 index = skip_annotation_value(buffer, limit, index); 1074 } 1075 } 1076 break; 1077 case '@': 1078 index = skip_annotation(buffer, limit, index); 1079 break; 1080 default: 1081 return limit; // bad tag byte 1082 } 1083 return index; 1084} 1085 1086// Sift through annotations, looking for those significant to the VM: 1087static void parse_annotations(const ConstantPool* const cp, 1088 const u1* buffer, int limit, 1089 AnnotationCollector* coll, 1090 ClassLoaderData* loader_data, 1091 TRAPS) { 1092 1093 assert(cp != NULL, "invariant"); 1094 assert(buffer != NULL, "invariant"); 1095 assert(coll != NULL, "invariant"); 1096 assert(loader_data != NULL, "invariant"); 1097 1098 // annotations := do(nann:u2) {annotation} 1099 int index = 0; 1100 if ((index += 2) >= limit) return; // read nann 1101 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1102 enum { // initial annotation layout 1103 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1104 count_off = 2, // u2 such as 1 (one value) 1105 member_off = 4, // utf8 such as 'value' 1106 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1107 e_tag_val = 'e', 1108 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1109 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1110 e_size = 11, // end of 'e' annotation 1111 c_tag_val = 'c', // payload is type 1112 c_con_off = 7, // utf8 payload, such as 'I' 1113 c_size = 9, // end of 'c' annotation 1114 s_tag_val = 's', // payload is String 1115 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1116 s_size = 9, 1117 min_size = 6 // smallest possible size (zero members) 1118 }; 1119 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) { 1120 int index0 = index; 1121 index = skip_annotation(buffer, limit, index); 1122 const u1* const abase = buffer + index0; 1123 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1124 const int count = Bytes::get_Java_u2((address)abase + count_off); 1125 const Symbol* const aname = check_symbol_at(cp, atype); 1126 if (aname == NULL) break; // invalid annotation name 1127 const Symbol* member = NULL; 1128 if (count >= 1) { 1129 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1130 member = check_symbol_at(cp, member_index); 1131 if (member == NULL) break; // invalid member name 1132 } 1133 1134 // Here is where parsing particular annotations will take place. 1135 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1136 if (AnnotationCollector::_unknown == id) continue; 1137 coll->set_annotation(id); 1138 1139 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1140 // @Contended can optionally specify the contention group. 1141 // 1142 // Contended group defines the equivalence class over the fields: 1143 // the fields within the same contended group are not treated distinct. 1144 // The only exception is default group, which does not incur the 1145 // equivalence. Naturally, contention group for classes is meaningless. 1146 // 1147 // While the contention group is specified as String, annotation 1148 // values are already interned, and we might as well use the constant 1149 // pool index as the group tag. 1150 // 1151 u2 group_index = 0; // default contended group 1152 if (count == 1 1153 && s_size == (index - index0) // match size 1154 && s_tag_val == *(abase + tag_off) 1155 && member == vmSymbols::value_name()) { 1156 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1157 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1158 group_index = 0; // default contended group 1159 } 1160 } 1161 coll->set_contended_group(group_index); 1162 } 1163 } 1164} 1165 1166 1167// Parse attributes for a field. 1168void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1169 u2 attributes_count, 1170 bool is_static, u2 signature_index, 1171 u2* const constantvalue_index_addr, 1172 bool* const is_synthetic_addr, 1173 u2* const generic_signature_index_addr, 1174 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1175 TRAPS) { 1176 assert(cfs != NULL, "invariant"); 1177 assert(constantvalue_index_addr != NULL, "invariant"); 1178 assert(is_synthetic_addr != NULL, "invariant"); 1179 assert(generic_signature_index_addr != NULL, "invariant"); 1180 assert(parsed_annotations != NULL, "invariant"); 1181 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1182 1183 u2 constantvalue_index = 0; 1184 u2 generic_signature_index = 0; 1185 bool is_synthetic = false; 1186 const u1* runtime_visible_annotations = NULL; 1187 int runtime_visible_annotations_length = 0; 1188 const u1* runtime_invisible_annotations = NULL; 1189 int runtime_invisible_annotations_length = 0; 1190 const u1* runtime_visible_type_annotations = NULL; 1191 int runtime_visible_type_annotations_length = 0; 1192 const u1* runtime_invisible_type_annotations = NULL; 1193 int runtime_invisible_type_annotations_length = 0; 1194 bool runtime_invisible_annotations_exists = false; 1195 bool runtime_invisible_type_annotations_exists = false; 1196 const ConstantPool* const cp = _cp; 1197 1198 while (attributes_count--) { 1199 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1200 const u2 attribute_name_index = cfs->get_u2_fast(); 1201 const u4 attribute_length = cfs->get_u4_fast(); 1202 check_property(valid_symbol_at(attribute_name_index), 1203 "Invalid field attribute index %u in class file %s", 1204 attribute_name_index, 1205 CHECK); 1206 1207 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1208 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1209 // ignore if non-static 1210 if (constantvalue_index != 0) { 1211 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1212 } 1213 check_property( 1214 attribute_length == 2, 1215 "Invalid ConstantValue field attribute length %u in class file %s", 1216 attribute_length, CHECK); 1217 1218 constantvalue_index = cfs->get_u2(CHECK); 1219 if (_need_verify) { 1220 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1221 } 1222 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1223 if (attribute_length != 0) { 1224 classfile_parse_error( 1225 "Invalid Synthetic field attribute length %u in class file %s", 1226 attribute_length, CHECK); 1227 } 1228 is_synthetic = true; 1229 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1230 if (attribute_length != 0) { 1231 classfile_parse_error( 1232 "Invalid Deprecated field attribute length %u in class file %s", 1233 attribute_length, CHECK); 1234 } 1235 } else if (_major_version >= JAVA_1_5_VERSION) { 1236 if (attribute_name == vmSymbols::tag_signature()) { 1237 if (attribute_length != 2) { 1238 classfile_parse_error( 1239 "Wrong size %u for field's Signature attribute in class file %s", 1240 attribute_length, CHECK); 1241 } 1242 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1243 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1244 if (runtime_visible_annotations != NULL) { 1245 classfile_parse_error( 1246 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1247 } 1248 runtime_visible_annotations_length = attribute_length; 1249 runtime_visible_annotations = cfs->get_u1_buffer(); 1250 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1251 parse_annotations(cp, 1252 runtime_visible_annotations, 1253 runtime_visible_annotations_length, 1254 parsed_annotations, 1255 _loader_data, 1256 CHECK); 1257 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 1258 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1259 if (runtime_invisible_annotations_exists) { 1260 classfile_parse_error( 1261 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1262 } 1263 runtime_invisible_annotations_exists = true; 1264 if (PreserveAllAnnotations) { 1265 runtime_invisible_annotations_length = attribute_length; 1266 runtime_invisible_annotations = cfs->get_u1_buffer(); 1267 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1268 } 1269 cfs->skip_u1(attribute_length, CHECK); 1270 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1271 if (runtime_visible_type_annotations != NULL) { 1272 classfile_parse_error( 1273 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1274 } 1275 runtime_visible_type_annotations_length = attribute_length; 1276 runtime_visible_type_annotations = cfs->get_u1_buffer(); 1277 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1278 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1279 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1280 if (runtime_invisible_type_annotations_exists) { 1281 classfile_parse_error( 1282 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1283 } else { 1284 runtime_invisible_type_annotations_exists = true; 1285 } 1286 if (PreserveAllAnnotations) { 1287 runtime_invisible_type_annotations_length = attribute_length; 1288 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 1289 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1290 } 1291 cfs->skip_u1(attribute_length, CHECK); 1292 } else { 1293 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1294 } 1295 } else { 1296 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1297 } 1298 } 1299 1300 *constantvalue_index_addr = constantvalue_index; 1301 *is_synthetic_addr = is_synthetic; 1302 *generic_signature_index_addr = generic_signature_index; 1303 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1304 runtime_visible_annotations_length, 1305 runtime_invisible_annotations, 1306 runtime_invisible_annotations_length, 1307 CHECK); 1308 parsed_annotations->set_field_annotations(a); 1309 a = assemble_annotations(runtime_visible_type_annotations, 1310 runtime_visible_type_annotations_length, 1311 runtime_invisible_type_annotations, 1312 runtime_invisible_type_annotations_length, 1313 CHECK); 1314 parsed_annotations->set_field_type_annotations(a); 1315 return; 1316} 1317 1318 1319// Field allocation types. Used for computing field offsets. 1320 1321enum FieldAllocationType { 1322 STATIC_OOP, // Oops 1323 STATIC_BYTE, // Boolean, Byte, char 1324 STATIC_SHORT, // shorts 1325 STATIC_WORD, // ints 1326 STATIC_DOUBLE, // aligned long or double 1327 NONSTATIC_OOP, 1328 NONSTATIC_BYTE, 1329 NONSTATIC_SHORT, 1330 NONSTATIC_WORD, 1331 NONSTATIC_DOUBLE, 1332 MAX_FIELD_ALLOCATION_TYPE, 1333 BAD_ALLOCATION_TYPE = -1 1334}; 1335 1336static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1337 BAD_ALLOCATION_TYPE, // 0 1338 BAD_ALLOCATION_TYPE, // 1 1339 BAD_ALLOCATION_TYPE, // 2 1340 BAD_ALLOCATION_TYPE, // 3 1341 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1342 NONSTATIC_SHORT, // T_CHAR = 5, 1343 NONSTATIC_WORD, // T_FLOAT = 6, 1344 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1345 NONSTATIC_BYTE, // T_BYTE = 8, 1346 NONSTATIC_SHORT, // T_SHORT = 9, 1347 NONSTATIC_WORD, // T_INT = 10, 1348 NONSTATIC_DOUBLE, // T_LONG = 11, 1349 NONSTATIC_OOP, // T_OBJECT = 12, 1350 NONSTATIC_OOP, // T_ARRAY = 13, 1351 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1352 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1353 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1354 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1355 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1356 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1357 BAD_ALLOCATION_TYPE, // 0 1358 BAD_ALLOCATION_TYPE, // 1 1359 BAD_ALLOCATION_TYPE, // 2 1360 BAD_ALLOCATION_TYPE, // 3 1361 STATIC_BYTE , // T_BOOLEAN = 4, 1362 STATIC_SHORT, // T_CHAR = 5, 1363 STATIC_WORD, // T_FLOAT = 6, 1364 STATIC_DOUBLE, // T_DOUBLE = 7, 1365 STATIC_BYTE, // T_BYTE = 8, 1366 STATIC_SHORT, // T_SHORT = 9, 1367 STATIC_WORD, // T_INT = 10, 1368 STATIC_DOUBLE, // T_LONG = 11, 1369 STATIC_OOP, // T_OBJECT = 12, 1370 STATIC_OOP, // T_ARRAY = 13, 1371 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1372 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1373 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1374 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1375 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1376 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1377}; 1378 1379static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1380 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1381 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1382 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1383 return result; 1384} 1385 1386class ClassFileParser::FieldAllocationCount : public ResourceObj { 1387 public: 1388 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1389 1390 FieldAllocationCount() { 1391 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1392 count[i] = 0; 1393 } 1394 } 1395 1396 FieldAllocationType update(bool is_static, BasicType type) { 1397 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1398 // Make sure there is no overflow with injected fields. 1399 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1400 count[atype]++; 1401 return atype; 1402 } 1403}; 1404 1405// Side-effects: populates the _fields, _fields_annotations, 1406// _fields_type_annotations fields 1407void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1408 bool is_interface, 1409 FieldAllocationCount* const fac, 1410 ConstantPool* cp, 1411 const int cp_size, 1412 u2* const java_fields_count_ptr, 1413 TRAPS) { 1414 1415 assert(cfs != NULL, "invariant"); 1416 assert(fac != NULL, "invariant"); 1417 assert(cp != NULL, "invariant"); 1418 assert(java_fields_count_ptr != NULL, "invariant"); 1419 1420 assert(NULL == _fields, "invariant"); 1421 assert(NULL == _fields_annotations, "invariant"); 1422 assert(NULL == _fields_type_annotations, "invariant"); 1423 1424 cfs->guarantee_more(2, CHECK); // length 1425 const u2 length = cfs->get_u2_fast(); 1426 *java_fields_count_ptr = length; 1427 1428 int num_injected = 0; 1429 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1430 &num_injected); 1431 const int total_fields = length + num_injected; 1432 1433 // The field array starts with tuples of shorts 1434 // [access, name index, sig index, initial value index, byte offset]. 1435 // A generic signature slot only exists for field with generic 1436 // signature attribute. And the access flag is set with 1437 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1438 // signature slots are at the end of the field array and after all 1439 // other fields data. 1440 // 1441 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1442 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1443 // ... 1444 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1445 // [generic signature index] 1446 // [generic signature index] 1447 // ... 1448 // 1449 // Allocate a temporary resource array for field data. For each field, 1450 // a slot is reserved in the temporary array for the generic signature 1451 // index. After parsing all fields, the data are copied to a permanent 1452 // array and any unused slots will be discarded. 1453 ResourceMark rm(THREAD); 1454 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1455 u2, 1456 total_fields * (FieldInfo::field_slots + 1)); 1457 1458 // The generic signature slots start after all other fields' data. 1459 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1460 int num_generic_signature = 0; 1461 for (int n = 0; n < length; n++) { 1462 // access_flags, name_index, descriptor_index, attributes_count 1463 cfs->guarantee_more(8, CHECK); 1464 1465 AccessFlags access_flags; 1466 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1467 verify_legal_field_modifiers(flags, is_interface, CHECK); 1468 access_flags.set_flags(flags); 1469 1470 const u2 name_index = cfs->get_u2_fast(); 1471 check_property(valid_symbol_at(name_index), 1472 "Invalid constant pool index %u for field name in class file %s", 1473 name_index, CHECK); 1474 const Symbol* const name = cp->symbol_at(name_index); 1475 verify_legal_field_name(name, CHECK); 1476 1477 const u2 signature_index = cfs->get_u2_fast(); 1478 check_property(valid_symbol_at(signature_index), 1479 "Invalid constant pool index %u for field signature in class file %s", 1480 signature_index, CHECK); 1481 const Symbol* const sig = cp->symbol_at(signature_index); 1482 verify_legal_field_signature(name, sig, CHECK); 1483 1484 u2 constantvalue_index = 0; 1485 bool is_synthetic = false; 1486 u2 generic_signature_index = 0; 1487 const bool is_static = access_flags.is_static(); 1488 FieldAnnotationCollector parsed_annotations(_loader_data); 1489 1490 const u2 attributes_count = cfs->get_u2_fast(); 1491 if (attributes_count > 0) { 1492 parse_field_attributes(cfs, 1493 attributes_count, 1494 is_static, 1495 signature_index, 1496 &constantvalue_index, 1497 &is_synthetic, 1498 &generic_signature_index, 1499 &parsed_annotations, 1500 CHECK); 1501 1502 if (parsed_annotations.field_annotations() != NULL) { 1503 if (_fields_annotations == NULL) { 1504 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1505 _loader_data, length, NULL, 1506 CHECK); 1507 } 1508 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1509 parsed_annotations.set_field_annotations(NULL); 1510 } 1511 if (parsed_annotations.field_type_annotations() != NULL) { 1512 if (_fields_type_annotations == NULL) { 1513 _fields_type_annotations = 1514 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1515 length, 1516 NULL, 1517 CHECK); 1518 } 1519 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1520 parsed_annotations.set_field_type_annotations(NULL); 1521 } 1522 1523 if (is_synthetic) { 1524 access_flags.set_is_synthetic(); 1525 } 1526 if (generic_signature_index != 0) { 1527 access_flags.set_field_has_generic_signature(); 1528 fa[generic_signature_slot] = generic_signature_index; 1529 generic_signature_slot ++; 1530 num_generic_signature ++; 1531 } 1532 } 1533 1534 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1535 field->initialize(access_flags.as_short(), 1536 name_index, 1537 signature_index, 1538 constantvalue_index); 1539 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1540 1541 // Remember how many oops we encountered and compute allocation type 1542 const FieldAllocationType atype = fac->update(is_static, type); 1543 field->set_allocation_type(atype); 1544 1545 // After field is initialized with type, we can augment it with aux info 1546 if (parsed_annotations.has_any_annotations()) 1547 parsed_annotations.apply_to(field); 1548 } 1549 1550 int index = length; 1551 if (num_injected != 0) { 1552 for (int n = 0; n < num_injected; n++) { 1553 // Check for duplicates 1554 if (injected[n].may_be_java) { 1555 const Symbol* const name = injected[n].name(); 1556 const Symbol* const signature = injected[n].signature(); 1557 bool duplicate = false; 1558 for (int i = 0; i < length; i++) { 1559 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1560 if (name == cp->symbol_at(f->name_index()) && 1561 signature == cp->symbol_at(f->signature_index())) { 1562 // Symbol is desclared in Java so skip this one 1563 duplicate = true; 1564 break; 1565 } 1566 } 1567 if (duplicate) { 1568 // These will be removed from the field array at the end 1569 continue; 1570 } 1571 } 1572 1573 // Injected field 1574 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1575 field->initialize(JVM_ACC_FIELD_INTERNAL, 1576 injected[n].name_index, 1577 injected[n].signature_index, 1578 0); 1579 1580 const BasicType type = FieldType::basic_type(injected[n].signature()); 1581 1582 // Remember how many oops we encountered and compute allocation type 1583 const FieldAllocationType atype = fac->update(false, type); 1584 field->set_allocation_type(atype); 1585 index++; 1586 } 1587 } 1588 1589 assert(NULL == _fields, "invariant"); 1590 1591 _fields = 1592 MetadataFactory::new_array<u2>(_loader_data, 1593 index * FieldInfo::field_slots + num_generic_signature, 1594 CHECK); 1595 // Sometimes injected fields already exist in the Java source so 1596 // the fields array could be too long. In that case the 1597 // fields array is trimed. Also unused slots that were reserved 1598 // for generic signature indexes are discarded. 1599 { 1600 int i = 0; 1601 for (; i < index * FieldInfo::field_slots; i++) { 1602 _fields->at_put(i, fa[i]); 1603 } 1604 for (int j = total_fields * FieldInfo::field_slots; 1605 j < generic_signature_slot; j++) { 1606 _fields->at_put(i++, fa[j]); 1607 } 1608 assert(_fields->length() == i, ""); 1609 } 1610 1611 if (_need_verify && length > 1) { 1612 // Check duplicated fields 1613 ResourceMark rm(THREAD); 1614 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1615 THREAD, NameSigHash*, HASH_ROW_SIZE); 1616 initialize_hashtable(names_and_sigs); 1617 bool dup = false; 1618 { 1619 debug_only(No_Safepoint_Verifier nsv;) 1620 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1621 const Symbol* const name = fs.name(); 1622 const Symbol* const sig = fs.signature(); 1623 // If no duplicates, add name/signature in hashtable names_and_sigs. 1624 if (!put_after_lookup(name, sig, names_and_sigs)) { 1625 dup = true; 1626 break; 1627 } 1628 } 1629 } 1630 if (dup) { 1631 classfile_parse_error("Duplicate field name&signature in class file %s", 1632 CHECK); 1633 } 1634 } 1635} 1636 1637 1638static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1639 while (length-- > 0) { 1640 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1641 } 1642} 1643 1644const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1645 u4 code_length, 1646 u4 exception_table_length, 1647 TRAPS) { 1648 assert(cfs != NULL, "invariant"); 1649 1650 const u2* const exception_table_start = cfs->get_u2_buffer(); 1651 assert(exception_table_start != NULL, "null exception table"); 1652 1653 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1654 // end_pc, 1655 // handler_pc, 1656 // catch_type_index 1657 1658 // Will check legal target after parsing code array in verifier. 1659 if (_need_verify) { 1660 for (unsigned int i = 0; i < exception_table_length; i++) { 1661 const u2 start_pc = cfs->get_u2_fast(); 1662 const u2 end_pc = cfs->get_u2_fast(); 1663 const u2 handler_pc = cfs->get_u2_fast(); 1664 const u2 catch_type_index = cfs->get_u2_fast(); 1665 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1666 "Illegal exception table range in class file %s", 1667 CHECK_NULL); 1668 guarantee_property(handler_pc < code_length, 1669 "Illegal exception table handler in class file %s", 1670 CHECK_NULL); 1671 if (catch_type_index != 0) { 1672 guarantee_property(valid_klass_reference_at(catch_type_index), 1673 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1674 } 1675 } 1676 } else { 1677 cfs->skip_u2_fast(exception_table_length * 4); 1678 } 1679 return exception_table_start; 1680} 1681 1682void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1683 u4 code_length, 1684 CompressedLineNumberWriteStream**const write_stream, 1685 TRAPS) { 1686 1687 const ClassFileStream* const cfs = _stream; 1688 unsigned int num_entries = cfs->get_u2(CHECK); 1689 1690 // Each entry is a u2 start_pc, and a u2 line_number 1691 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1692 1693 // Verify line number attribute and table length 1694 check_property( 1695 code_attribute_length == sizeof(u2) + length_in_bytes, 1696 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1697 1698 cfs->guarantee_more(length_in_bytes, CHECK); 1699 1700 if ((*write_stream) == NULL) { 1701 if (length_in_bytes > fixed_buffer_size) { 1702 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1703 } else { 1704 (*write_stream) = new CompressedLineNumberWriteStream( 1705 _linenumbertable_buffer, fixed_buffer_size); 1706 } 1707 } 1708 1709 while (num_entries-- > 0) { 1710 const u2 bci = cfs->get_u2_fast(); // start_pc 1711 const u2 line = cfs->get_u2_fast(); // line_number 1712 guarantee_property(bci < code_length, 1713 "Invalid pc in LineNumberTable in class file %s", CHECK); 1714 (*write_stream)->write_pair(bci, line); 1715 } 1716} 1717 1718 1719class LVT_Hash : public AllStatic { 1720 public: 1721 1722 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1723 /* 1724 * 3-tuple start_bci/length/slot has to be unique key, 1725 * so the following comparison seems to be redundant: 1726 * && elem->name_cp_index == entry->_elem->name_cp_index 1727 */ 1728 return (e0.start_bci == e1.start_bci && 1729 e0.length == e1.length && 1730 e0.name_cp_index == e1.name_cp_index && 1731 e0.slot == e1.slot); 1732 } 1733 1734 static unsigned int hash(LocalVariableTableElement const& e0) { 1735 unsigned int raw_hash = e0.start_bci; 1736 1737 raw_hash = e0.length + raw_hash * 37; 1738 raw_hash = e0.name_cp_index + raw_hash * 37; 1739 raw_hash = e0.slot + raw_hash * 37; 1740 1741 return raw_hash; 1742 } 1743}; 1744 1745 1746// Class file LocalVariableTable elements. 1747class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1748 public: 1749 u2 start_bci; 1750 u2 length; 1751 u2 name_cp_index; 1752 u2 descriptor_cp_index; 1753 u2 slot; 1754}; 1755 1756static void copy_lvt_element(const Classfile_LVT_Element* const src, 1757 LocalVariableTableElement* const lvt) { 1758 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1759 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1760 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1761 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1762 lvt->signature_cp_index = 0; 1763 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1764} 1765 1766// Function is used to parse both attributes: 1767// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1768const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1769 u4 code_length, 1770 u2 max_locals, 1771 u4 code_attribute_length, 1772 u2* const localvariable_table_length, 1773 bool isLVTT, 1774 TRAPS) { 1775 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1776 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1777 const unsigned int size = 1778 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1779 1780 const ConstantPool* const cp = _cp; 1781 1782 // Verify local variable table attribute has right length 1783 if (_need_verify) { 1784 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1785 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1786 } 1787 1788 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1789 assert(localvariable_table_start != NULL, "null local variable table"); 1790 if (!_need_verify) { 1791 cfs->skip_u2_fast(size); 1792 } else { 1793 cfs->guarantee_more(size * 2, CHECK_NULL); 1794 for(int i = 0; i < (*localvariable_table_length); i++) { 1795 const u2 start_pc = cfs->get_u2_fast(); 1796 const u2 length = cfs->get_u2_fast(); 1797 const u2 name_index = cfs->get_u2_fast(); 1798 const u2 descriptor_index = cfs->get_u2_fast(); 1799 const u2 index = cfs->get_u2_fast(); 1800 // Assign to a u4 to avoid overflow 1801 const u4 end_pc = (u4)start_pc + (u4)length; 1802 1803 if (start_pc >= code_length) { 1804 classfile_parse_error( 1805 "Invalid start_pc %u in %s in class file %s", 1806 start_pc, tbl_name, CHECK_NULL); 1807 } 1808 if (end_pc > code_length) { 1809 classfile_parse_error( 1810 "Invalid length %u in %s in class file %s", 1811 length, tbl_name, CHECK_NULL); 1812 } 1813 const int cp_size = cp->length(); 1814 guarantee_property(valid_symbol_at(name_index), 1815 "Name index %u in %s has bad constant type in class file %s", 1816 name_index, tbl_name, CHECK_NULL); 1817 guarantee_property(valid_symbol_at(descriptor_index), 1818 "Signature index %u in %s has bad constant type in class file %s", 1819 descriptor_index, tbl_name, CHECK_NULL); 1820 1821 const Symbol* const name = cp->symbol_at(name_index); 1822 const Symbol* const sig = cp->symbol_at(descriptor_index); 1823 verify_legal_field_name(name, CHECK_NULL); 1824 u2 extra_slot = 0; 1825 if (!isLVTT) { 1826 verify_legal_field_signature(name, sig, CHECK_NULL); 1827 1828 // 4894874: check special cases for double and long local variables 1829 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1830 sig == vmSymbols::type_signature(T_LONG)) { 1831 extra_slot = 1; 1832 } 1833 } 1834 guarantee_property((index + extra_slot) < max_locals, 1835 "Invalid index %u in %s in class file %s", 1836 index, tbl_name, CHECK_NULL); 1837 } 1838 } 1839 return localvariable_table_start; 1840} 1841 1842 1843void ClassFileParser::parse_type_array(u2 array_length, 1844 u4 code_length, 1845 u4* const u1_index, 1846 u4* const u2_index, 1847 u1* const u1_array, 1848 u2* const u2_array, 1849 TRAPS) { 1850 const ClassFileStream* const cfs = _stream; 1851 u2 index = 0; // index in the array with long/double occupying two slots 1852 u4 i1 = *u1_index; 1853 u4 i2 = *u2_index + 1; 1854 for(int i = 0; i < array_length; i++) { 1855 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1856 index++; 1857 if (tag == ITEM_Long || tag == ITEM_Double) { 1858 index++; 1859 } else if (tag == ITEM_Object) { 1860 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1861 guarantee_property(valid_klass_reference_at(class_index), 1862 "Bad class index %u in StackMap in class file %s", 1863 class_index, CHECK); 1864 } else if (tag == ITEM_Uninitialized) { 1865 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1866 guarantee_property( 1867 offset < code_length, 1868 "Bad uninitialized type offset %u in StackMap in class file %s", 1869 offset, CHECK); 1870 } else { 1871 guarantee_property( 1872 tag <= (u1)ITEM_Uninitialized, 1873 "Unknown variable type %u in StackMap in class file %s", 1874 tag, CHECK); 1875 } 1876 } 1877 u2_array[*u2_index] = index; 1878 *u1_index = i1; 1879 *u2_index = i2; 1880} 1881 1882static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1883 u4 code_attribute_length, 1884 bool need_verify, 1885 TRAPS) { 1886 assert(cfs != NULL, "invariant"); 1887 1888 if (0 == code_attribute_length) { 1889 return NULL; 1890 } 1891 1892 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1893 assert(stackmap_table_start != NULL, "null stackmap table"); 1894 1895 // check code_attribute_length first 1896 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1897 1898 if (!need_verify && !DumpSharedSpaces) { 1899 return NULL; 1900 } 1901 return stackmap_table_start; 1902} 1903 1904const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1905 u2* const checked_exceptions_length, 1906 u4 method_attribute_length, 1907 TRAPS) { 1908 assert(cfs != NULL, "invariant"); 1909 assert(checked_exceptions_length != NULL, "invariant"); 1910 1911 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1912 *checked_exceptions_length = cfs->get_u2_fast(); 1913 const unsigned int size = 1914 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1915 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1916 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1917 if (!_need_verify) { 1918 cfs->skip_u2_fast(size); 1919 } else { 1920 // Verify each value in the checked exception table 1921 u2 checked_exception; 1922 const u2 len = *checked_exceptions_length; 1923 cfs->guarantee_more(2 * len, CHECK_NULL); 1924 for (int i = 0; i < len; i++) { 1925 checked_exception = cfs->get_u2_fast(); 1926 check_property( 1927 valid_klass_reference_at(checked_exception), 1928 "Exception name has bad type at constant pool %u in class file %s", 1929 checked_exception, CHECK_NULL); 1930 } 1931 } 1932 // check exceptions attribute length 1933 if (_need_verify) { 1934 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1935 sizeof(u2) * size), 1936 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1937 } 1938 return checked_exceptions_start; 1939} 1940 1941void ClassFileParser::throwIllegalSignature(const char* type, 1942 const Symbol* name, 1943 const Symbol* sig, 1944 TRAPS) const { 1945 assert(name != NULL, "invariant"); 1946 assert(sig != NULL, "invariant"); 1947 1948 ResourceMark rm(THREAD); 1949 Exceptions::fthrow(THREAD_AND_LOCATION, 1950 vmSymbols::java_lang_ClassFormatError(), 1951 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1952 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1953} 1954 1955AnnotationCollector::ID 1956AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 1957 const Symbol* name) { 1958 const vmSymbols::SID sid = vmSymbols::find_sid(name); 1959 // Privileged code can use all annotations. Other code silently drops some. 1960 const bool privileged = loader_data->is_the_null_class_loader_data() || 1961 loader_data->is_ext_class_loader_data() || 1962 loader_data->is_anonymous(); 1963 switch (sid) { 1964 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): { 1965 if (_location != _in_method) break; // only allow for methods 1966 if (!privileged) break; // only allow in privileged code 1967 return _method_CallerSensitive; 1968 } 1969 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature): { 1970 if (_location != _in_method) break; // only allow for methods 1971 if (!privileged) break; // only allow in privileged code 1972 return _method_ForceInline; 1973 } 1974 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature): { 1975 if (_location != _in_method) break; // only allow for methods 1976 if (!privileged) break; // only allow in privileged code 1977 return _method_DontInline; 1978 } 1979 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 1980 if (_location != _in_method) break; // only allow for methods 1981 if (!privileged) break; // only allow in privileged code 1982 return _method_InjectedProfile; 1983 } 1984 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 1985 if (_location != _in_method) break; // only allow for methods 1986 if (!privileged) break; // only allow in privileged code 1987 return _method_LambdaForm_Compiled; 1988 } 1989 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 1990 if (_location != _in_method) break; // only allow for methods 1991 if (!privileged) break; // only allow in privileged code 1992 return _method_LambdaForm_Hidden; 1993 } 1994 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 1995 if (_location != _in_method) break; // only allow for methods 1996 if (!privileged) break; // only allow in privileged code 1997 return _method_HotSpotIntrinsicCandidate; 1998 } 1999#if INCLUDE_JVMCI 2000 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): { 2001 if (_location != _in_field) break; // only allow for fields 2002 if (!privileged) break; // only allow in privileged code 2003 return _field_Stable; 2004 } 2005#endif 2006 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature): { 2007 if (_location != _in_field) break; // only allow for fields 2008 if (!privileged) break; // only allow in privileged code 2009 return _field_Stable; 2010 } 2011 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2012 if (_location != _in_field && _location != _in_class) { 2013 break; // only allow for fields and classes 2014 } 2015 if (!EnableContended || (RestrictContended && !privileged)) { 2016 break; // honor privileges 2017 } 2018 return _jdk_internal_vm_annotation_Contended; 2019 } 2020 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2021 if (_location != _in_method) break; // only allow for methods 2022 if (RestrictReservedStack && !privileged) break; // honor privileges 2023 return _jdk_internal_vm_annotation_ReservedStackAccess; 2024 } 2025 default: { 2026 break; 2027 } 2028 } 2029 return AnnotationCollector::_unknown; 2030} 2031 2032void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2033 if (is_contended()) 2034 f->set_contended_group(contended_group()); 2035 if (is_stable()) 2036 f->set_stable(true); 2037} 2038 2039ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2040 // If there's an error deallocate metadata for field annotations 2041 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2042 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2043} 2044 2045void MethodAnnotationCollector::apply_to(methodHandle m) { 2046 if (has_annotation(_method_CallerSensitive)) 2047 m->set_caller_sensitive(true); 2048 if (has_annotation(_method_ForceInline)) 2049 m->set_force_inline(true); 2050 if (has_annotation(_method_DontInline)) 2051 m->set_dont_inline(true); 2052 if (has_annotation(_method_InjectedProfile)) 2053 m->set_has_injected_profile(true); 2054 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2055 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2056 if (has_annotation(_method_LambdaForm_Hidden)) 2057 m->set_hidden(true); 2058 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2059 m->set_intrinsic_candidate(true); 2060 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2061 m->set_has_reserved_stack_access(true); 2062} 2063 2064void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2065 assert(ik != NULL, "invariant"); 2066 ik->set_is_contended(is_contended()); 2067} 2068 2069#define MAX_ARGS_SIZE 255 2070#define MAX_CODE_SIZE 65535 2071#define INITIAL_MAX_LVT_NUMBER 256 2072 2073/* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2074 * 2075 * Rules for LVT's and LVTT's are: 2076 * - There can be any number of LVT's and LVTT's. 2077 * - If there are n LVT's, it is the same as if there was just 2078 * one LVT containing all the entries from the n LVT's. 2079 * - There may be no more than one LVT entry per local variable. 2080 * Two LVT entries are 'equal' if these fields are the same: 2081 * start_pc, length, name, slot 2082 * - There may be no more than one LVTT entry per each LVT entry. 2083 * Each LVTT entry has to match some LVT entry. 2084 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2085 */ 2086void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2087 int lvt_cnt, 2088 u2* const localvariable_table_length, 2089 const u2**const localvariable_table_start, 2090 int lvtt_cnt, 2091 u2* const localvariable_type_table_length, 2092 const u2**const localvariable_type_table_start, 2093 TRAPS) { 2094 2095 ResourceMark rm(THREAD); 2096 2097 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2098 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2099 2100 LVT_HashTable* const table = new LVT_HashTable(); 2101 2102 // To fill LocalVariableTable in 2103 const Classfile_LVT_Element* cf_lvt; 2104 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2105 2106 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2107 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2108 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2109 copy_lvt_element(&cf_lvt[idx], lvt); 2110 // If no duplicates, add LVT elem in hashtable. 2111 if (table->put(*lvt, lvt) == false 2112 && _need_verify 2113 && _major_version >= JAVA_1_5_VERSION) { 2114 classfile_parse_error("Duplicated LocalVariableTable attribute " 2115 "entry for '%s' in class file %s", 2116 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2117 CHECK); 2118 } 2119 } 2120 } 2121 2122 // To merge LocalVariableTable and LocalVariableTypeTable 2123 const Classfile_LVT_Element* cf_lvtt; 2124 LocalVariableTableElement lvtt_elem; 2125 2126 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2127 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2128 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2129 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2130 LocalVariableTableElement** entry = table->get(lvtt_elem); 2131 if (entry == NULL) { 2132 if (_need_verify) { 2133 classfile_parse_error("LVTT entry for '%s' in class file %s " 2134 "does not match any LVT entry", 2135 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2136 CHECK); 2137 } 2138 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2139 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2140 "entry for '%s' in class file %s", 2141 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2142 CHECK); 2143 } else { 2144 // to add generic signatures into LocalVariableTable 2145 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2146 } 2147 } 2148 } 2149} 2150 2151 2152void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2153 const u1* runtime_visible_annotations, 2154 int runtime_visible_annotations_length, 2155 const u1* runtime_invisible_annotations, 2156 int runtime_invisible_annotations_length, 2157 const u1* runtime_visible_parameter_annotations, 2158 int runtime_visible_parameter_annotations_length, 2159 const u1* runtime_invisible_parameter_annotations, 2160 int runtime_invisible_parameter_annotations_length, 2161 const u1* runtime_visible_type_annotations, 2162 int runtime_visible_type_annotations_length, 2163 const u1* runtime_invisible_type_annotations, 2164 int runtime_invisible_type_annotations_length, 2165 const u1* annotation_default, 2166 int annotation_default_length, 2167 TRAPS) { 2168 2169 AnnotationArray* a; 2170 2171 if (runtime_visible_annotations_length + 2172 runtime_invisible_annotations_length > 0) { 2173 a = assemble_annotations(runtime_visible_annotations, 2174 runtime_visible_annotations_length, 2175 runtime_invisible_annotations, 2176 runtime_invisible_annotations_length, 2177 CHECK); 2178 cm->set_method_annotations(a); 2179 } 2180 2181 if (runtime_visible_parameter_annotations_length + 2182 runtime_invisible_parameter_annotations_length > 0) { 2183 a = assemble_annotations(runtime_visible_parameter_annotations, 2184 runtime_visible_parameter_annotations_length, 2185 runtime_invisible_parameter_annotations, 2186 runtime_invisible_parameter_annotations_length, 2187 CHECK); 2188 cm->set_parameter_annotations(a); 2189 } 2190 2191 if (annotation_default_length > 0) { 2192 a = assemble_annotations(annotation_default, 2193 annotation_default_length, 2194 NULL, 2195 0, 2196 CHECK); 2197 cm->set_default_annotations(a); 2198 } 2199 2200 if (runtime_visible_type_annotations_length + 2201 runtime_invisible_type_annotations_length > 0) { 2202 a = assemble_annotations(runtime_visible_type_annotations, 2203 runtime_visible_type_annotations_length, 2204 runtime_invisible_type_annotations, 2205 runtime_invisible_type_annotations_length, 2206 CHECK); 2207 cm->set_type_annotations(a); 2208 } 2209} 2210 2211 2212// Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2213// attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2214// Method* to save footprint, so we only know the size of the resulting Method* when the 2215// entire method attribute is parsed. 2216// 2217// The promoted_flags parameter is used to pass relevant access_flags 2218// from the method back up to the containing klass. These flag values 2219// are added to klass's access_flags. 2220 2221Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2222 bool is_interface, 2223 const ConstantPool* cp, 2224 AccessFlags* const promoted_flags, 2225 TRAPS) { 2226 assert(cfs != NULL, "invariant"); 2227 assert(cp != NULL, "invariant"); 2228 assert(promoted_flags != NULL, "invariant"); 2229 2230 ResourceMark rm(THREAD); 2231 // Parse fixed parts: 2232 // access_flags, name_index, descriptor_index, attributes_count 2233 cfs->guarantee_more(8, CHECK_NULL); 2234 2235 int flags = cfs->get_u2_fast(); 2236 const u2 name_index = cfs->get_u2_fast(); 2237 const int cp_size = cp->length(); 2238 check_property( 2239 valid_symbol_at(name_index), 2240 "Illegal constant pool index %u for method name in class file %s", 2241 name_index, CHECK_NULL); 2242 const Symbol* const name = cp->symbol_at(name_index); 2243 verify_legal_method_name(name, CHECK_NULL); 2244 2245 const u2 signature_index = cfs->get_u2_fast(); 2246 guarantee_property( 2247 valid_symbol_at(signature_index), 2248 "Illegal constant pool index %u for method signature in class file %s", 2249 signature_index, CHECK_NULL); 2250 const Symbol* const signature = cp->symbol_at(signature_index); 2251 2252 if (name == vmSymbols::class_initializer_name()) { 2253 // We ignore the other access flags for a valid class initializer. 2254 // (JVM Spec 2nd ed., chapter 4.6) 2255 if (_major_version < 51) { // backward compatibility 2256 flags = JVM_ACC_STATIC; 2257 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2258 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2259 } else { 2260 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2261 } 2262 } else { 2263 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2264 } 2265 2266 if (name == vmSymbols::object_initializer_name() && is_interface) { 2267 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2268 } 2269 2270 int args_size = -1; // only used when _need_verify is true 2271 if (_need_verify) { 2272 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2273 verify_legal_method_signature(name, signature, CHECK_NULL); 2274 if (args_size > MAX_ARGS_SIZE) { 2275 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2276 } 2277 } 2278 2279 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2280 2281 // Default values for code and exceptions attribute elements 2282 u2 max_stack = 0; 2283 u2 max_locals = 0; 2284 u4 code_length = 0; 2285 const u1* code_start = 0; 2286 u2 exception_table_length = 0; 2287 const u2* exception_table_start = NULL; 2288 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2289 u2 checked_exceptions_length = 0; 2290 const u2* checked_exceptions_start = NULL; 2291 CompressedLineNumberWriteStream* linenumber_table = NULL; 2292 int linenumber_table_length = 0; 2293 int total_lvt_length = 0; 2294 u2 lvt_cnt = 0; 2295 u2 lvtt_cnt = 0; 2296 bool lvt_allocated = false; 2297 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2298 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2299 u2* localvariable_table_length = NULL; 2300 const u2** localvariable_table_start = NULL; 2301 u2* localvariable_type_table_length = NULL; 2302 const u2** localvariable_type_table_start = NULL; 2303 int method_parameters_length = -1; 2304 const u1* method_parameters_data = NULL; 2305 bool method_parameters_seen = false; 2306 bool parsed_code_attribute = false; 2307 bool parsed_checked_exceptions_attribute = false; 2308 bool parsed_stackmap_attribute = false; 2309 // stackmap attribute - JDK1.5 2310 const u1* stackmap_data = NULL; 2311 int stackmap_data_length = 0; 2312 u2 generic_signature_index = 0; 2313 MethodAnnotationCollector parsed_annotations; 2314 const u1* runtime_visible_annotations = NULL; 2315 int runtime_visible_annotations_length = 0; 2316 const u1* runtime_invisible_annotations = NULL; 2317 int runtime_invisible_annotations_length = 0; 2318 const u1* runtime_visible_parameter_annotations = NULL; 2319 int runtime_visible_parameter_annotations_length = 0; 2320 const u1* runtime_invisible_parameter_annotations = NULL; 2321 int runtime_invisible_parameter_annotations_length = 0; 2322 const u1* runtime_visible_type_annotations = NULL; 2323 int runtime_visible_type_annotations_length = 0; 2324 const u1* runtime_invisible_type_annotations = NULL; 2325 int runtime_invisible_type_annotations_length = 0; 2326 bool runtime_invisible_annotations_exists = false; 2327 bool runtime_invisible_type_annotations_exists = false; 2328 bool runtime_invisible_parameter_annotations_exists = false; 2329 const u1* annotation_default = NULL; 2330 int annotation_default_length = 0; 2331 2332 // Parse code and exceptions attribute 2333 u2 method_attributes_count = cfs->get_u2_fast(); 2334 while (method_attributes_count--) { 2335 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2336 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2337 const u4 method_attribute_length = cfs->get_u4_fast(); 2338 check_property( 2339 valid_symbol_at(method_attribute_name_index), 2340 "Invalid method attribute name index %u in class file %s", 2341 method_attribute_name_index, CHECK_NULL); 2342 2343 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2344 if (method_attribute_name == vmSymbols::tag_code()) { 2345 // Parse Code attribute 2346 if (_need_verify) { 2347 guarantee_property( 2348 !access_flags.is_native() && !access_flags.is_abstract(), 2349 "Code attribute in native or abstract methods in class file %s", 2350 CHECK_NULL); 2351 } 2352 if (parsed_code_attribute) { 2353 classfile_parse_error("Multiple Code attributes in class file %s", 2354 CHECK_NULL); 2355 } 2356 parsed_code_attribute = true; 2357 2358 // Stack size, locals size, and code size 2359 if (_major_version == 45 && _minor_version <= 2) { 2360 cfs->guarantee_more(4, CHECK_NULL); 2361 max_stack = cfs->get_u1_fast(); 2362 max_locals = cfs->get_u1_fast(); 2363 code_length = cfs->get_u2_fast(); 2364 } else { 2365 cfs->guarantee_more(8, CHECK_NULL); 2366 max_stack = cfs->get_u2_fast(); 2367 max_locals = cfs->get_u2_fast(); 2368 code_length = cfs->get_u4_fast(); 2369 } 2370 if (_need_verify) { 2371 guarantee_property(args_size <= max_locals, 2372 "Arguments can't fit into locals in class file %s", 2373 CHECK_NULL); 2374 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2375 "Invalid method Code length %u in class file %s", 2376 code_length, CHECK_NULL); 2377 } 2378 // Code pointer 2379 code_start = cfs->get_u1_buffer(); 2380 assert(code_start != NULL, "null code start"); 2381 cfs->guarantee_more(code_length, CHECK_NULL); 2382 cfs->skip_u1_fast(code_length); 2383 2384 // Exception handler table 2385 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2386 exception_table_length = cfs->get_u2_fast(); 2387 if (exception_table_length > 0) { 2388 exception_table_start = parse_exception_table(cfs, 2389 code_length, 2390 exception_table_length, 2391 CHECK_NULL); 2392 } 2393 2394 // Parse additional attributes in code attribute 2395 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2396 u2 code_attributes_count = cfs->get_u2_fast(); 2397 2398 unsigned int calculated_attribute_length = 0; 2399 2400 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2401 calculated_attribute_length = 2402 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2403 } else { 2404 // max_stack, locals and length are smaller in pre-version 45.2 classes 2405 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2406 } 2407 calculated_attribute_length += 2408 code_length + 2409 sizeof(exception_table_length) + 2410 sizeof(code_attributes_count) + 2411 exception_table_length * 2412 ( sizeof(u2) + // start_pc 2413 sizeof(u2) + // end_pc 2414 sizeof(u2) + // handler_pc 2415 sizeof(u2) ); // catch_type_index 2416 2417 while (code_attributes_count--) { 2418 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2419 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2420 const u4 code_attribute_length = cfs->get_u4_fast(); 2421 calculated_attribute_length += code_attribute_length + 2422 sizeof(code_attribute_name_index) + 2423 sizeof(code_attribute_length); 2424 check_property(valid_symbol_at(code_attribute_name_index), 2425 "Invalid code attribute name index %u in class file %s", 2426 code_attribute_name_index, 2427 CHECK_NULL); 2428 if (LoadLineNumberTables && 2429 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2430 // Parse and compress line number table 2431 parse_linenumber_table(code_attribute_length, 2432 code_length, 2433 &linenumber_table, 2434 CHECK_NULL); 2435 2436 } else if (LoadLocalVariableTables && 2437 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2438 // Parse local variable table 2439 if (!lvt_allocated) { 2440 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2441 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2442 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2443 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2444 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2445 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2446 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2447 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2448 lvt_allocated = true; 2449 } 2450 if (lvt_cnt == max_lvt_cnt) { 2451 max_lvt_cnt <<= 1; 2452 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2453 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2454 } 2455 localvariable_table_start[lvt_cnt] = 2456 parse_localvariable_table(cfs, 2457 code_length, 2458 max_locals, 2459 code_attribute_length, 2460 &localvariable_table_length[lvt_cnt], 2461 false, // is not LVTT 2462 CHECK_NULL); 2463 total_lvt_length += localvariable_table_length[lvt_cnt]; 2464 lvt_cnt++; 2465 } else if (LoadLocalVariableTypeTables && 2466 _major_version >= JAVA_1_5_VERSION && 2467 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2468 if (!lvt_allocated) { 2469 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2470 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2471 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2472 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2473 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2474 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2475 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2476 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2477 lvt_allocated = true; 2478 } 2479 // Parse local variable type table 2480 if (lvtt_cnt == max_lvtt_cnt) { 2481 max_lvtt_cnt <<= 1; 2482 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2483 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2484 } 2485 localvariable_type_table_start[lvtt_cnt] = 2486 parse_localvariable_table(cfs, 2487 code_length, 2488 max_locals, 2489 code_attribute_length, 2490 &localvariable_type_table_length[lvtt_cnt], 2491 true, // is LVTT 2492 CHECK_NULL); 2493 lvtt_cnt++; 2494 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2495 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2496 // Stack map is only needed by the new verifier in JDK1.5. 2497 if (parsed_stackmap_attribute) { 2498 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2499 } 2500 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2501 stackmap_data_length = code_attribute_length; 2502 parsed_stackmap_attribute = true; 2503 } else { 2504 // Skip unknown attributes 2505 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2506 } 2507 } 2508 // check method attribute length 2509 if (_need_verify) { 2510 guarantee_property(method_attribute_length == calculated_attribute_length, 2511 "Code segment has wrong length in class file %s", 2512 CHECK_NULL); 2513 } 2514 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2515 // Parse Exceptions attribute 2516 if (parsed_checked_exceptions_attribute) { 2517 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2518 CHECK_NULL); 2519 } 2520 parsed_checked_exceptions_attribute = true; 2521 checked_exceptions_start = 2522 parse_checked_exceptions(cfs, 2523 &checked_exceptions_length, 2524 method_attribute_length, 2525 CHECK_NULL); 2526 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2527 // reject multiple method parameters 2528 if (method_parameters_seen) { 2529 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2530 CHECK_NULL); 2531 } 2532 method_parameters_seen = true; 2533 method_parameters_length = cfs->get_u1_fast(); 2534 const u2 real_length = (method_parameters_length * 4u) + 1u; 2535 if (method_attribute_length != real_length) { 2536 classfile_parse_error( 2537 "Invalid MethodParameters method attribute length %u in class file", 2538 method_attribute_length, CHECK_NULL); 2539 } 2540 method_parameters_data = cfs->get_u1_buffer(); 2541 cfs->skip_u2_fast(method_parameters_length); 2542 cfs->skip_u2_fast(method_parameters_length); 2543 // ignore this attribute if it cannot be reflected 2544 if (!SystemDictionary::Parameter_klass_loaded()) 2545 method_parameters_length = -1; 2546 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2547 if (method_attribute_length != 0) { 2548 classfile_parse_error( 2549 "Invalid Synthetic method attribute length %u in class file %s", 2550 method_attribute_length, CHECK_NULL); 2551 } 2552 // Should we check that there hasn't already been a synthetic attribute? 2553 access_flags.set_is_synthetic(); 2554 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2555 if (method_attribute_length != 0) { 2556 classfile_parse_error( 2557 "Invalid Deprecated method attribute length %u in class file %s", 2558 method_attribute_length, CHECK_NULL); 2559 } 2560 } else if (_major_version >= JAVA_1_5_VERSION) { 2561 if (method_attribute_name == vmSymbols::tag_signature()) { 2562 if (method_attribute_length != 2) { 2563 classfile_parse_error( 2564 "Invalid Signature attribute length %u in class file %s", 2565 method_attribute_length, CHECK_NULL); 2566 } 2567 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2568 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2569 if (runtime_visible_annotations != NULL) { 2570 classfile_parse_error( 2571 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2572 CHECK_NULL); 2573 } 2574 runtime_visible_annotations_length = method_attribute_length; 2575 runtime_visible_annotations = cfs->get_u1_buffer(); 2576 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2577 parse_annotations(cp, 2578 runtime_visible_annotations, 2579 runtime_visible_annotations_length, 2580 &parsed_annotations, 2581 _loader_data, 2582 CHECK_NULL); 2583 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL); 2584 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2585 if (runtime_invisible_annotations_exists) { 2586 classfile_parse_error( 2587 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2588 CHECK_NULL); 2589 } 2590 runtime_invisible_annotations_exists = true; 2591 if (PreserveAllAnnotations) { 2592 runtime_invisible_annotations_length = method_attribute_length; 2593 runtime_invisible_annotations = cfs->get_u1_buffer(); 2594 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2595 } 2596 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2597 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2598 if (runtime_visible_parameter_annotations != NULL) { 2599 classfile_parse_error( 2600 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2601 CHECK_NULL); 2602 } 2603 runtime_visible_parameter_annotations_length = method_attribute_length; 2604 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2605 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2606 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2607 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2608 if (runtime_invisible_parameter_annotations_exists) { 2609 classfile_parse_error( 2610 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2611 CHECK_NULL); 2612 } 2613 runtime_invisible_parameter_annotations_exists = true; 2614 if (PreserveAllAnnotations) { 2615 runtime_invisible_parameter_annotations_length = method_attribute_length; 2616 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2617 assert(runtime_invisible_parameter_annotations != NULL, 2618 "null invisible parameter annotations"); 2619 } 2620 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2621 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2622 if (annotation_default != NULL) { 2623 classfile_parse_error( 2624 "Multiple AnnotationDefault attributes for method in class file %s", 2625 CHECK_NULL); 2626 } 2627 annotation_default_length = method_attribute_length; 2628 annotation_default = cfs->get_u1_buffer(); 2629 assert(annotation_default != NULL, "null annotation default"); 2630 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2631 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2632 if (runtime_visible_type_annotations != NULL) { 2633 classfile_parse_error( 2634 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2635 CHECK_NULL); 2636 } 2637 runtime_visible_type_annotations_length = method_attribute_length; 2638 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2639 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2640 // No need for the VM to parse Type annotations 2641 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2642 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2643 if (runtime_invisible_type_annotations_exists) { 2644 classfile_parse_error( 2645 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2646 CHECK_NULL); 2647 } else { 2648 runtime_invisible_type_annotations_exists = true; 2649 } 2650 if (PreserveAllAnnotations) { 2651 runtime_invisible_type_annotations_length = method_attribute_length; 2652 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2653 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2654 } 2655 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2656 } else { 2657 // Skip unknown attributes 2658 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2659 } 2660 } else { 2661 // Skip unknown attributes 2662 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2663 } 2664 } 2665 2666 if (linenumber_table != NULL) { 2667 linenumber_table->write_terminator(); 2668 linenumber_table_length = linenumber_table->position(); 2669 } 2670 2671 // Make sure there's at least one Code attribute in non-native/non-abstract method 2672 if (_need_verify) { 2673 guarantee_property(access_flags.is_native() || 2674 access_flags.is_abstract() || 2675 parsed_code_attribute, 2676 "Absent Code attribute in method that is not native or abstract in class file %s", 2677 CHECK_NULL); 2678 } 2679 2680 // All sizing information for a Method* is finally available, now create it 2681 InlineTableSizes sizes( 2682 total_lvt_length, 2683 linenumber_table_length, 2684 exception_table_length, 2685 checked_exceptions_length, 2686 method_parameters_length, 2687 generic_signature_index, 2688 runtime_visible_annotations_length + 2689 runtime_invisible_annotations_length, 2690 runtime_visible_parameter_annotations_length + 2691 runtime_invisible_parameter_annotations_length, 2692 runtime_visible_type_annotations_length + 2693 runtime_invisible_type_annotations_length, 2694 annotation_default_length, 2695 0); 2696 2697 Method* const m = Method::allocate(_loader_data, 2698 code_length, 2699 access_flags, 2700 &sizes, 2701 ConstMethod::NORMAL, 2702 CHECK_NULL); 2703 2704 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize); 2705 2706 // Fill in information from fixed part (access_flags already set) 2707 m->set_constants(_cp); 2708 m->set_name_index(name_index); 2709 m->set_signature_index(signature_index); 2710#ifdef CC_INTERP 2711 // hmm is there a gc issue here?? 2712 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2713 m->set_result_index(rtf.type()); 2714#endif 2715 2716 if (args_size >= 0) { 2717 m->set_size_of_parameters(args_size); 2718 } else { 2719 m->compute_size_of_parameters(THREAD); 2720 } 2721#ifdef ASSERT 2722 if (args_size >= 0) { 2723 m->compute_size_of_parameters(THREAD); 2724 assert(args_size == m->size_of_parameters(), ""); 2725 } 2726#endif 2727 2728 // Fill in code attribute information 2729 m->set_max_stack(max_stack); 2730 m->set_max_locals(max_locals); 2731 if (stackmap_data != NULL) { 2732 m->constMethod()->copy_stackmap_data(_loader_data, 2733 (u1*)stackmap_data, 2734 stackmap_data_length, 2735 CHECK_NULL); 2736 } 2737 2738 // Copy byte codes 2739 m->set_code((u1*)code_start); 2740 2741 // Copy line number table 2742 if (linenumber_table != NULL) { 2743 memcpy(m->compressed_linenumber_table(), 2744 linenumber_table->buffer(), 2745 linenumber_table_length); 2746 } 2747 2748 // Copy exception table 2749 if (exception_table_length > 0) { 2750 int size = 2751 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); 2752 copy_u2_with_conversion((u2*) m->exception_table_start(), 2753 exception_table_start, size); 2754 } 2755 2756 // Copy method parameters 2757 if (method_parameters_length > 0) { 2758 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2759 for (int i = 0; i < method_parameters_length; i++) { 2760 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2761 method_parameters_data += 2; 2762 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2763 method_parameters_data += 2; 2764 } 2765 } 2766 2767 // Copy checked exceptions 2768 if (checked_exceptions_length > 0) { 2769 const int size = 2770 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2771 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), 2772 checked_exceptions_start, 2773 size); 2774 } 2775 2776 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2777 if (total_lvt_length > 0) { 2778 promoted_flags->set_has_localvariable_table(); 2779 copy_localvariable_table(m->constMethod(), 2780 lvt_cnt, 2781 localvariable_table_length, 2782 localvariable_table_start, 2783 lvtt_cnt, 2784 localvariable_type_table_length, 2785 localvariable_type_table_start, 2786 CHECK_NULL); 2787 } 2788 2789 if (parsed_annotations.has_any_annotations()) 2790 parsed_annotations.apply_to(m); 2791 2792 // Copy annotations 2793 copy_method_annotations(m->constMethod(), 2794 runtime_visible_annotations, 2795 runtime_visible_annotations_length, 2796 runtime_invisible_annotations, 2797 runtime_invisible_annotations_length, 2798 runtime_visible_parameter_annotations, 2799 runtime_visible_parameter_annotations_length, 2800 runtime_invisible_parameter_annotations, 2801 runtime_invisible_parameter_annotations_length, 2802 runtime_visible_type_annotations, 2803 runtime_visible_type_annotations_length, 2804 runtime_invisible_type_annotations, 2805 runtime_invisible_type_annotations_length, 2806 annotation_default, 2807 annotation_default_length, 2808 CHECK_NULL); 2809 2810 if (name == vmSymbols::finalize_method_name() && 2811 signature == vmSymbols::void_method_signature()) { 2812 if (m->is_empty_method()) { 2813 _has_empty_finalizer = true; 2814 } else { 2815 _has_finalizer = true; 2816 } 2817 } 2818 if (name == vmSymbols::object_initializer_name() && 2819 signature == vmSymbols::void_method_signature() && 2820 m->is_vanilla_constructor()) { 2821 _has_vanilla_constructor = true; 2822 } 2823 2824 NOT_PRODUCT(m->verify()); 2825 return m; 2826} 2827 2828 2829// The promoted_flags parameter is used to pass relevant access_flags 2830// from the methods back up to the containing klass. These flag values 2831// are added to klass's access_flags. 2832// Side-effects: populates the _methods field in the parser 2833void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2834 bool is_interface, 2835 AccessFlags* promoted_flags, 2836 bool* has_final_method, 2837 bool* declares_default_methods, 2838 TRAPS) { 2839 assert(cfs != NULL, "invariant"); 2840 assert(promoted_flags != NULL, "invariant"); 2841 assert(has_final_method != NULL, "invariant"); 2842 assert(declares_default_methods != NULL, "invariant"); 2843 2844 assert(NULL == _methods, "invariant"); 2845 2846 cfs->guarantee_more(2, CHECK); // length 2847 const u2 length = cfs->get_u2_fast(); 2848 if (length == 0) { 2849 _methods = Universe::the_empty_method_array(); 2850 } else { 2851 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2852 length, 2853 NULL, 2854 CHECK); 2855 2856 HandleMark hm(THREAD); 2857 for (int index = 0; index < length; index++) { 2858 Method* method = parse_method(cfs, 2859 is_interface, 2860 _cp, 2861 promoted_flags, 2862 CHECK); 2863 2864 if (method->is_final()) { 2865 *has_final_method = true; 2866 } 2867 // declares_default_methods: declares concrete instance methods, any access flags 2868 // used for interface initialization, and default method inheritance analysis 2869 if (is_interface && !(*declares_default_methods) 2870 && !method->is_abstract() && !method->is_static()) { 2871 *declares_default_methods = true; 2872 } 2873 _methods->at_put(index, method); 2874 } 2875 2876 if (_need_verify && length > 1) { 2877 // Check duplicated methods 2878 ResourceMark rm(THREAD); 2879 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2880 THREAD, NameSigHash*, HASH_ROW_SIZE); 2881 initialize_hashtable(names_and_sigs); 2882 bool dup = false; 2883 { 2884 debug_only(No_Safepoint_Verifier nsv;) 2885 for (int i = 0; i < length; i++) { 2886 const Method* const m = _methods->at(i); 2887 // If no duplicates, add name/signature in hashtable names_and_sigs. 2888 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { 2889 dup = true; 2890 break; 2891 } 2892 } 2893 } 2894 if (dup) { 2895 classfile_parse_error("Duplicate method name&signature in class file %s", 2896 CHECK); 2897 } 2898 } 2899 } 2900} 2901 2902static const intArray* sort_methods(Array<Method*>* methods) { 2903 const int length = methods->length(); 2904 // If JVMTI original method ordering or sharing is enabled we have to 2905 // remember the original class file ordering. 2906 // We temporarily use the vtable_index field in the Method* to store the 2907 // class file index, so we can read in after calling qsort. 2908 // Put the method ordering in the shared archive. 2909 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2910 for (int index = 0; index < length; index++) { 2911 Method* const m = methods->at(index); 2912 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2913 m->set_vtable_index(index); 2914 } 2915 } 2916 // Sort method array by ascending method name (for faster lookups & vtable construction) 2917 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2918 Method::sort_methods(methods); 2919 2920 intArray* method_ordering = NULL; 2921 // If JVMTI original method ordering or sharing is enabled construct int 2922 // array remembering the original ordering 2923 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2924 method_ordering = new intArray(length); 2925 for (int index = 0; index < length; index++) { 2926 Method* const m = methods->at(index); 2927 const int old_index = m->vtable_index(); 2928 assert(old_index >= 0 && old_index < length, "invalid method index"); 2929 method_ordering->at_put(index, old_index); 2930 m->set_vtable_index(Method::invalid_vtable_index); 2931 } 2932 } 2933 return method_ordering; 2934} 2935 2936// Parse generic_signature attribute for methods and fields 2937u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 2938 TRAPS) { 2939 assert(cfs != NULL, "invariant"); 2940 2941 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 2942 const u2 generic_signature_index = cfs->get_u2_fast(); 2943 check_property( 2944 valid_symbol_at(generic_signature_index), 2945 "Invalid Signature attribute at constant pool index %u in class file %s", 2946 generic_signature_index, CHECK_0); 2947 return generic_signature_index; 2948} 2949 2950void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 2951 TRAPS) { 2952 2953 assert(cfs != NULL, "invariant"); 2954 2955 cfs->guarantee_more(2, CHECK); // sourcefile_index 2956 const u2 sourcefile_index = cfs->get_u2_fast(); 2957 check_property( 2958 valid_symbol_at(sourcefile_index), 2959 "Invalid SourceFile attribute at constant pool index %u in class file %s", 2960 sourcefile_index, CHECK); 2961 set_class_sourcefile_index(sourcefile_index); 2962} 2963 2964void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 2965 int length, 2966 TRAPS) { 2967 assert(cfs != NULL, "invariant"); 2968 2969 const u1* const sde_buffer = cfs->get_u1_buffer(); 2970 assert(sde_buffer != NULL, "null sde buffer"); 2971 2972 // Don't bother storing it if there is no way to retrieve it 2973 if (JvmtiExport::can_get_source_debug_extension()) { 2974 assert((length+1) > length, "Overflow checking"); 2975 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 2976 for (int i = 0; i < length; i++) { 2977 sde[i] = sde_buffer[i]; 2978 } 2979 sde[length] = '\0'; 2980 set_class_sde_buffer((const char*)sde, length); 2981 } 2982 // Got utf8 string, set stream position forward 2983 cfs->skip_u1(length, CHECK); 2984} 2985 2986 2987// Inner classes can be static, private or protected (classic VM does this) 2988#define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 2989 JVM_ACC_PRIVATE | \ 2990 JVM_ACC_PROTECTED | \ 2991 JVM_ACC_STATIC \ 2992 ) 2993 2994// Return number of classes in the inner classes attribute table 2995u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 2996 const u1* const inner_classes_attribute_start, 2997 bool parsed_enclosingmethod_attribute, 2998 u2 enclosing_method_class_index, 2999 u2 enclosing_method_method_index, 3000 TRAPS) { 3001 const u1* const current_mark = cfs->current(); 3002 u2 length = 0; 3003 if (inner_classes_attribute_start != NULL) { 3004 cfs->set_current(inner_classes_attribute_start); 3005 cfs->guarantee_more(2, CHECK_0); // length 3006 length = cfs->get_u2_fast(); 3007 } 3008 3009 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3010 // method data: 3011 // [inner_class_info_index, 3012 // outer_class_info_index, 3013 // inner_name_index, 3014 // inner_class_access_flags, 3015 // ... 3016 // enclosing_method_class_index, 3017 // enclosing_method_method_index] 3018 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3019 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3020 _inner_classes = inner_classes; 3021 3022 int index = 0; 3023 const int cp_size = _cp->length(); 3024 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3025 for (int n = 0; n < length; n++) { 3026 // Inner class index 3027 const u2 inner_class_info_index = cfs->get_u2_fast(); 3028 check_property( 3029 valid_klass_reference_at(inner_class_info_index), 3030 "inner_class_info_index %u has bad constant type in class file %s", 3031 inner_class_info_index, CHECK_0); 3032 // Outer class index 3033 const u2 outer_class_info_index = cfs->get_u2_fast(); 3034 check_property( 3035 outer_class_info_index == 0 || 3036 valid_klass_reference_at(outer_class_info_index), 3037 "outer_class_info_index %u has bad constant type in class file %s", 3038 outer_class_info_index, CHECK_0); 3039 // Inner class name 3040 const u2 inner_name_index = cfs->get_u2_fast(); 3041 check_property( 3042 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3043 "inner_name_index %u has bad constant type in class file %s", 3044 inner_name_index, CHECK_0); 3045 if (_need_verify) { 3046 guarantee_property(inner_class_info_index != outer_class_info_index, 3047 "Class is both outer and inner class in class file %s", CHECK_0); 3048 } 3049 // Access flags 3050 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3051 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3052 // Set abstract bit for old class files for backward compatibility 3053 flags |= JVM_ACC_ABSTRACT; 3054 } 3055 verify_legal_class_modifiers(flags, CHECK_0); 3056 AccessFlags inner_access_flags(flags); 3057 3058 inner_classes->at_put(index++, inner_class_info_index); 3059 inner_classes->at_put(index++, outer_class_info_index); 3060 inner_classes->at_put(index++, inner_name_index); 3061 inner_classes->at_put(index++, inner_access_flags.as_short()); 3062 } 3063 3064 // 4347400: make sure there's no duplicate entry in the classes array 3065 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3066 for(int i = 0; i < length * 4; i += 4) { 3067 for(int j = i + 4; j < length * 4; j += 4) { 3068 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3069 inner_classes->at(i+1) != inner_classes->at(j+1) || 3070 inner_classes->at(i+2) != inner_classes->at(j+2) || 3071 inner_classes->at(i+3) != inner_classes->at(j+3)), 3072 "Duplicate entry in InnerClasses in class file %s", 3073 CHECK_0); 3074 } 3075 } 3076 } 3077 3078 // Set EnclosingMethod class and method indexes. 3079 if (parsed_enclosingmethod_attribute) { 3080 inner_classes->at_put(index++, enclosing_method_class_index); 3081 inner_classes->at_put(index++, enclosing_method_method_index); 3082 } 3083 assert(index == size, "wrong size"); 3084 3085 // Restore buffer's current position. 3086 cfs->set_current(current_mark); 3087 3088 return length; 3089} 3090 3091void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3092 set_class_synthetic_flag(true); 3093} 3094 3095void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3096 assert(cfs != NULL, "invariant"); 3097 3098 const u2 signature_index = cfs->get_u2(CHECK); 3099 check_property( 3100 valid_symbol_at(signature_index), 3101 "Invalid constant pool index %u in Signature attribute in class file %s", 3102 signature_index, CHECK); 3103 set_class_generic_signature_index(signature_index); 3104} 3105 3106void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3107 ConstantPool* cp, 3108 u4 attribute_byte_length, 3109 TRAPS) { 3110 assert(cfs != NULL, "invariant"); 3111 assert(cp != NULL, "invariant"); 3112 3113 const u1* const current_start = cfs->current(); 3114 3115 guarantee_property(attribute_byte_length >= sizeof(u2), 3116 "Invalid BootstrapMethods attribute length %u in class file %s", 3117 attribute_byte_length, 3118 CHECK); 3119 3120 cfs->guarantee_more(attribute_byte_length, CHECK); 3121 3122 const int attribute_array_length = cfs->get_u2_fast(); 3123 3124 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3125 "Short length on BootstrapMethods in class file %s", 3126 CHECK); 3127 3128 3129 // The attribute contains a counted array of counted tuples of shorts, 3130 // represending bootstrap specifiers: 3131 // length*{bootstrap_method_index, argument_count*{argument_index}} 3132 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3133 // operand_count = number of shorts in attr, except for leading length 3134 3135 // The attribute is copied into a short[] array. 3136 // The array begins with a series of short[2] pairs, one for each tuple. 3137 const int index_size = (attribute_array_length * 2); 3138 3139 Array<u2>* const operands = 3140 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3141 3142 // Eagerly assign operands so they will be deallocated with the constant 3143 // pool if there is an error. 3144 cp->set_operands(operands); 3145 3146 int operand_fill_index = index_size; 3147 const int cp_size = cp->length(); 3148 3149 for (int n = 0; n < attribute_array_length; n++) { 3150 // Store a 32-bit offset into the header of the operand array. 3151 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3152 3153 // Read a bootstrap specifier. 3154 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3155 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3156 const u2 argument_count = cfs->get_u2_fast(); 3157 check_property( 3158 valid_cp_range(bootstrap_method_index, cp_size) && 3159 cp->tag_at(bootstrap_method_index).is_method_handle(), 3160 "bootstrap_method_index %u has bad constant type in class file %s", 3161 bootstrap_method_index, 3162 CHECK); 3163 3164 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3165 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3166 CHECK); 3167 3168 operands->at_put(operand_fill_index++, bootstrap_method_index); 3169 operands->at_put(operand_fill_index++, argument_count); 3170 3171 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3172 for (int j = 0; j < argument_count; j++) { 3173 const u2 argument_index = cfs->get_u2_fast(); 3174 check_property( 3175 valid_cp_range(argument_index, cp_size) && 3176 cp->tag_at(argument_index).is_loadable_constant(), 3177 "argument_index %u has bad constant type in class file %s", 3178 argument_index, 3179 CHECK); 3180 operands->at_put(operand_fill_index++, argument_index); 3181 } 3182 } 3183 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3184 "Bad length on BootstrapMethods in class file %s", 3185 CHECK); 3186} 3187 3188void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3189 ConstantPool* cp, 3190 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3191 TRAPS) { 3192 assert(cfs != NULL, "invariant"); 3193 assert(cp != NULL, "invariant"); 3194 assert(parsed_annotations != NULL, "invariant"); 3195 3196 // Set inner classes attribute to default sentinel 3197 _inner_classes = Universe::the_empty_short_array(); 3198 cfs->guarantee_more(2, CHECK); // attributes_count 3199 u2 attributes_count = cfs->get_u2_fast(); 3200 bool parsed_sourcefile_attribute = false; 3201 bool parsed_innerclasses_attribute = false; 3202 bool parsed_enclosingmethod_attribute = false; 3203 bool parsed_bootstrap_methods_attribute = false; 3204 const u1* runtime_visible_annotations = NULL; 3205 int runtime_visible_annotations_length = 0; 3206 const u1* runtime_invisible_annotations = NULL; 3207 int runtime_invisible_annotations_length = 0; 3208 const u1* runtime_visible_type_annotations = NULL; 3209 int runtime_visible_type_annotations_length = 0; 3210 const u1* runtime_invisible_type_annotations = NULL; 3211 int runtime_invisible_type_annotations_length = 0; 3212 bool runtime_invisible_type_annotations_exists = false; 3213 bool runtime_invisible_annotations_exists = false; 3214 bool parsed_source_debug_ext_annotations_exist = false; 3215 const u1* inner_classes_attribute_start = NULL; 3216 u4 inner_classes_attribute_length = 0; 3217 u2 enclosing_method_class_index = 0; 3218 u2 enclosing_method_method_index = 0; 3219 // Iterate over attributes 3220 while (attributes_count--) { 3221 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3222 const u2 attribute_name_index = cfs->get_u2_fast(); 3223 const u4 attribute_length = cfs->get_u4_fast(); 3224 check_property( 3225 valid_symbol_at(attribute_name_index), 3226 "Attribute name has bad constant pool index %u in class file %s", 3227 attribute_name_index, CHECK); 3228 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3229 if (tag == vmSymbols::tag_source_file()) { 3230 // Check for SourceFile tag 3231 if (_need_verify) { 3232 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3233 } 3234 if (parsed_sourcefile_attribute) { 3235 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3236 } else { 3237 parsed_sourcefile_attribute = true; 3238 } 3239 parse_classfile_sourcefile_attribute(cfs, CHECK); 3240 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3241 // Check for SourceDebugExtension tag 3242 if (parsed_source_debug_ext_annotations_exist) { 3243 classfile_parse_error( 3244 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3245 } 3246 parsed_source_debug_ext_annotations_exist = true; 3247 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3248 } else if (tag == vmSymbols::tag_inner_classes()) { 3249 // Check for InnerClasses tag 3250 if (parsed_innerclasses_attribute) { 3251 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3252 } else { 3253 parsed_innerclasses_attribute = true; 3254 } 3255 inner_classes_attribute_start = cfs->get_u1_buffer(); 3256 inner_classes_attribute_length = attribute_length; 3257 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3258 } else if (tag == vmSymbols::tag_synthetic()) { 3259 // Check for Synthetic tag 3260 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3261 if (attribute_length != 0) { 3262 classfile_parse_error( 3263 "Invalid Synthetic classfile attribute length %u in class file %s", 3264 attribute_length, CHECK); 3265 } 3266 parse_classfile_synthetic_attribute(CHECK); 3267 } else if (tag == vmSymbols::tag_deprecated()) { 3268 // Check for Deprecatd tag - 4276120 3269 if (attribute_length != 0) { 3270 classfile_parse_error( 3271 "Invalid Deprecated classfile attribute length %u in class file %s", 3272 attribute_length, CHECK); 3273 } 3274 } else if (_major_version >= JAVA_1_5_VERSION) { 3275 if (tag == vmSymbols::tag_signature()) { 3276 if (attribute_length != 2) { 3277 classfile_parse_error( 3278 "Wrong Signature attribute length %u in class file %s", 3279 attribute_length, CHECK); 3280 } 3281 parse_classfile_signature_attribute(cfs, CHECK); 3282 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3283 if (runtime_visible_annotations != NULL) { 3284 classfile_parse_error( 3285 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3286 } 3287 runtime_visible_annotations_length = attribute_length; 3288 runtime_visible_annotations = cfs->get_u1_buffer(); 3289 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3290 parse_annotations(cp, 3291 runtime_visible_annotations, 3292 runtime_visible_annotations_length, 3293 parsed_annotations, 3294 _loader_data, 3295 CHECK); 3296 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 3297 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3298 if (runtime_invisible_annotations_exists) { 3299 classfile_parse_error( 3300 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3301 } 3302 runtime_invisible_annotations_exists = true; 3303 if (PreserveAllAnnotations) { 3304 runtime_invisible_annotations_length = attribute_length; 3305 runtime_invisible_annotations = cfs->get_u1_buffer(); 3306 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3307 } 3308 cfs->skip_u1(attribute_length, CHECK); 3309 } else if (tag == vmSymbols::tag_enclosing_method()) { 3310 if (parsed_enclosingmethod_attribute) { 3311 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3312 } else { 3313 parsed_enclosingmethod_attribute = true; 3314 } 3315 guarantee_property(attribute_length == 4, 3316 "Wrong EnclosingMethod attribute length %u in class file %s", 3317 attribute_length, CHECK); 3318 cfs->guarantee_more(4, CHECK); // class_index, method_index 3319 enclosing_method_class_index = cfs->get_u2_fast(); 3320 enclosing_method_method_index = cfs->get_u2_fast(); 3321 if (enclosing_method_class_index == 0) { 3322 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3323 } 3324 // Validate the constant pool indices and types 3325 check_property(valid_klass_reference_at(enclosing_method_class_index), 3326 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3327 if (enclosing_method_method_index != 0 && 3328 (!cp->is_within_bounds(enclosing_method_method_index) || 3329 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3330 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3331 } 3332 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3333 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3334 if (parsed_bootstrap_methods_attribute) 3335 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3336 parsed_bootstrap_methods_attribute = true; 3337 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3338 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3339 if (runtime_visible_type_annotations != NULL) { 3340 classfile_parse_error( 3341 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3342 } 3343 runtime_visible_type_annotations_length = attribute_length; 3344 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3345 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3346 // No need for the VM to parse Type annotations 3347 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3348 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3349 if (runtime_invisible_type_annotations_exists) { 3350 classfile_parse_error( 3351 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3352 } else { 3353 runtime_invisible_type_annotations_exists = true; 3354 } 3355 if (PreserveAllAnnotations) { 3356 runtime_invisible_type_annotations_length = attribute_length; 3357 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3358 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3359 } 3360 cfs->skip_u1(attribute_length, CHECK); 3361 } else { 3362 // Unknown attribute 3363 cfs->skip_u1(attribute_length, CHECK); 3364 } 3365 } else { 3366 // Unknown attribute 3367 cfs->skip_u1(attribute_length, CHECK); 3368 } 3369 } 3370 _annotations = assemble_annotations(runtime_visible_annotations, 3371 runtime_visible_annotations_length, 3372 runtime_invisible_annotations, 3373 runtime_invisible_annotations_length, 3374 CHECK); 3375 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3376 runtime_visible_type_annotations_length, 3377 runtime_invisible_type_annotations, 3378 runtime_invisible_type_annotations_length, 3379 CHECK); 3380 3381 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3382 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3383 cfs, 3384 inner_classes_attribute_start, 3385 parsed_innerclasses_attribute, 3386 enclosing_method_class_index, 3387 enclosing_method_method_index, 3388 CHECK); 3389 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3390 guarantee_property( 3391 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3392 "Wrong InnerClasses attribute length in class file %s", CHECK); 3393 } 3394 } 3395 3396 if (_max_bootstrap_specifier_index >= 0) { 3397 guarantee_property(parsed_bootstrap_methods_attribute, 3398 "Missing BootstrapMethods attribute in class file %s", CHECK); 3399 } 3400} 3401 3402void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3403 assert(k != NULL, "invariant"); 3404 3405 if (_synthetic_flag) 3406 k->set_is_synthetic(); 3407 if (_sourcefile_index != 0) { 3408 k->set_source_file_name_index(_sourcefile_index); 3409 } 3410 if (_generic_signature_index != 0) { 3411 k->set_generic_signature_index(_generic_signature_index); 3412 } 3413 if (_sde_buffer != NULL) { 3414 k->set_source_debug_extension(_sde_buffer, _sde_length); 3415 } 3416} 3417 3418// Create the Annotations object that will 3419// hold the annotations array for the Klass. 3420void ClassFileParser::create_combined_annotations(TRAPS) { 3421 if (_annotations == NULL && 3422 _type_annotations == NULL && 3423 _fields_annotations == NULL && 3424 _fields_type_annotations == NULL) { 3425 // Don't create the Annotations object unnecessarily. 3426 return; 3427 } 3428 3429 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3430 annotations->set_class_annotations(_annotations); 3431 annotations->set_class_type_annotations(_type_annotations); 3432 annotations->set_fields_annotations(_fields_annotations); 3433 annotations->set_fields_type_annotations(_fields_type_annotations); 3434 3435 // This is the Annotations object that will be 3436 // assigned to InstanceKlass being constructed. 3437 _combined_annotations = annotations; 3438 3439 // The annotations arrays below has been transfered the 3440 // _combined_annotations so these fields can now be cleared. 3441 _annotations = NULL; 3442 _type_annotations = NULL; 3443 _fields_annotations = NULL; 3444 _fields_type_annotations = NULL; 3445} 3446 3447// Transfer ownership of metadata allocated to the InstanceKlass. 3448void ClassFileParser::apply_parsed_class_metadata( 3449 InstanceKlass* this_klass, 3450 int java_fields_count, TRAPS) { 3451 assert(this_klass != NULL, "invariant"); 3452 3453 _cp->set_pool_holder(this_klass); 3454 this_klass->set_constants(_cp); 3455 this_klass->set_fields(_fields, java_fields_count); 3456 this_klass->set_methods(_methods); 3457 this_klass->set_inner_classes(_inner_classes); 3458 this_klass->set_local_interfaces(_local_interfaces); 3459 this_klass->set_transitive_interfaces(_transitive_interfaces); 3460 this_klass->set_annotations(_combined_annotations); 3461 3462 // Clear out these fields so they don't get deallocated by the destructor 3463 clear_class_metadata(); 3464} 3465 3466AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3467 int runtime_visible_annotations_length, 3468 const u1* const runtime_invisible_annotations, 3469 int runtime_invisible_annotations_length, 3470 TRAPS) { 3471 AnnotationArray* annotations = NULL; 3472 if (runtime_visible_annotations != NULL || 3473 runtime_invisible_annotations != NULL) { 3474 annotations = MetadataFactory::new_array<u1>(_loader_data, 3475 runtime_visible_annotations_length + 3476 runtime_invisible_annotations_length, 3477 CHECK_(annotations)); 3478 if (runtime_visible_annotations != NULL) { 3479 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3480 annotations->at_put(i, runtime_visible_annotations[i]); 3481 } 3482 } 3483 if (runtime_invisible_annotations != NULL) { 3484 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3485 int append = runtime_visible_annotations_length+i; 3486 annotations->at_put(append, runtime_invisible_annotations[i]); 3487 } 3488 } 3489 } 3490 return annotations; 3491} 3492 3493const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3494 const int super_class_index, 3495 const bool need_verify, 3496 TRAPS) { 3497 assert(cp != NULL, "invariant"); 3498 const InstanceKlass* super_klass = NULL; 3499 3500 if (super_class_index == 0) { 3501 check_property(_class_name == vmSymbols::java_lang_Object(), 3502 "Invalid superclass index %u in class file %s", 3503 super_class_index, 3504 CHECK_NULL); 3505 } else { 3506 check_property(valid_klass_reference_at(super_class_index), 3507 "Invalid superclass index %u in class file %s", 3508 super_class_index, 3509 CHECK_NULL); 3510 // The class name should be legal because it is checked when parsing constant pool. 3511 // However, make sure it is not an array type. 3512 bool is_array = false; 3513 if (cp->tag_at(super_class_index).is_klass()) { 3514 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3515 if (need_verify) 3516 is_array = super_klass->is_array_klass(); 3517 } else if (need_verify) { 3518 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3519 } 3520 if (need_verify) { 3521 guarantee_property(!is_array, 3522 "Bad superclass name in class file %s", CHECK_NULL); 3523 } 3524 } 3525 return super_klass; 3526} 3527 3528static unsigned int compute_oop_map_count(const InstanceKlass* super, 3529 unsigned int nonstatic_oop_map_count, 3530 int first_nonstatic_oop_offset) { 3531 3532 unsigned int map_count = 3533 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3534 if (nonstatic_oop_map_count > 0) { 3535 // We have oops to add to map 3536 if (map_count == 0) { 3537 map_count = nonstatic_oop_map_count; 3538 } 3539 else { 3540 // Check whether we should add a new map block or whether the last one can 3541 // be extended 3542 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3543 const OopMapBlock* const last_map = first_map + map_count - 1; 3544 3545 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3546 if (next_offset == first_nonstatic_oop_offset) { 3547 // There is no gap bettwen superklass's last oop field and first 3548 // local oop field, merge maps. 3549 nonstatic_oop_map_count -= 1; 3550 } 3551 else { 3552 // Superklass didn't end with a oop field, add extra maps 3553 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3554 } 3555 map_count += nonstatic_oop_map_count; 3556 } 3557 } 3558 return map_count; 3559} 3560 3561#ifndef PRODUCT 3562static void print_field_layout(const Symbol* name, 3563 Array<u2>* fields, 3564 constantPoolHandle cp, 3565 int instance_size, 3566 int instance_fields_start, 3567 int instance_fields_end, 3568 int static_fields_end) { 3569 3570 assert(name != NULL, "invariant"); 3571 3572 tty->print("%s: field layout\n", name->as_klass_external_name()); 3573 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3574 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3575 if (!fs.access_flags().is_static()) { 3576 tty->print(" @%3d \"%s\" %s\n", 3577 fs.offset(), 3578 fs.name()->as_klass_external_name(), 3579 fs.signature()->as_klass_external_name()); 3580 } 3581 } 3582 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3583 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3584 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3585 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3586 if (fs.access_flags().is_static()) { 3587 tty->print(" @%3d \"%s\" %s\n", 3588 fs.offset(), 3589 fs.name()->as_klass_external_name(), 3590 fs.signature()->as_klass_external_name()); 3591 } 3592 } 3593 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3594 tty->print("\n"); 3595} 3596#endif 3597 3598// Values needed for oopmap and InstanceKlass creation 3599class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3600 public: 3601 int* nonstatic_oop_offsets; 3602 unsigned int* nonstatic_oop_counts; 3603 unsigned int nonstatic_oop_map_count; 3604 unsigned int total_oop_map_count; 3605 int instance_size; 3606 int nonstatic_field_size; 3607 int static_field_size; 3608 bool has_nonstatic_fields; 3609}; 3610 3611// Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3612void ClassFileParser::layout_fields(ConstantPool* cp, 3613 const FieldAllocationCount* fac, 3614 const ClassAnnotationCollector* parsed_annotations, 3615 FieldLayoutInfo* info, 3616 TRAPS) { 3617 3618 assert(cp != NULL, "invariant"); 3619 3620 // Field size and offset computation 3621 int nonstatic_field_size = _super_klass == NULL ? 0 : 3622 _super_klass->nonstatic_field_size(); 3623 3624 // Count the contended fields by type. 3625 // 3626 // We ignore static fields, because @Contended is not supported for them. 3627 // The layout code below will also ignore the static fields. 3628 int nonstatic_contended_count = 0; 3629 FieldAllocationCount fac_contended; 3630 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3631 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3632 if (fs.is_contended()) { 3633 fac_contended.count[atype]++; 3634 if (!fs.access_flags().is_static()) { 3635 nonstatic_contended_count++; 3636 } 3637 } 3638 } 3639 3640 3641 // Calculate the starting byte offsets 3642 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3643 int next_static_double_offset = next_static_oop_offset + 3644 ((fac->count[STATIC_OOP]) * heapOopSize); 3645 if ( fac->count[STATIC_DOUBLE] && 3646 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3647 Universe::field_type_should_be_aligned(T_LONG)) ) { 3648 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3649 } 3650 3651 int next_static_word_offset = next_static_double_offset + 3652 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3653 int next_static_short_offset = next_static_word_offset + 3654 ((fac->count[STATIC_WORD]) * BytesPerInt); 3655 int next_static_byte_offset = next_static_short_offset + 3656 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3657 3658 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3659 nonstatic_field_size * heapOopSize; 3660 3661 int next_nonstatic_field_offset = nonstatic_fields_start; 3662 3663 const bool is_contended_class = parsed_annotations->is_contended(); 3664 3665 // Class is contended, pad before all the fields 3666 if (is_contended_class) { 3667 next_nonstatic_field_offset += ContendedPaddingWidth; 3668 } 3669 3670 // Compute the non-contended fields count. 3671 // The packing code below relies on these counts to determine if some field 3672 // can be squeezed into the alignment gap. Contended fields are obviously 3673 // exempt from that. 3674 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3675 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3676 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3677 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3678 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3679 3680 // Total non-static fields count, including every contended field 3681 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3682 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3683 fac->count[NONSTATIC_OOP]; 3684 3685 const bool super_has_nonstatic_fields = 3686 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3687 const bool has_nonstatic_fields = 3688 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3689 3690 3691 // Prepare list of oops for oop map generation. 3692 // 3693 // "offset" and "count" lists are describing the set of contiguous oop 3694 // regions. offset[i] is the start of the i-th region, which then has 3695 // count[i] oops following. Before we know how many regions are required, 3696 // we pessimistically allocate the maps to fit all the oops into the 3697 // distinct regions. 3698 // 3699 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3700 // to figure out if we still need to do this. 3701 unsigned int nonstatic_oop_map_count = 0; 3702 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3703 3704 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3705 THREAD, int, max_nonstatic_oop_maps); 3706 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3707 THREAD, unsigned int, max_nonstatic_oop_maps); 3708 3709 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3710 3711 bool compact_fields = CompactFields; 3712 int allocation_style = FieldsAllocationStyle; 3713 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3714 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3715 allocation_style = 1; // Optimistic 3716 } 3717 3718 // The next classes have predefined hard-coded fields offsets 3719 // (see in JavaClasses::compute_hard_coded_offsets()). 3720 // Use default fields allocation order for them. 3721 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3722 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3723 _class_name == vmSymbols::java_lang_Class() || 3724 _class_name == vmSymbols::java_lang_ClassLoader() || 3725 _class_name == vmSymbols::java_lang_ref_Reference() || 3726 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3727 _class_name == vmSymbols::java_lang_StackTraceElement() || 3728 _class_name == vmSymbols::java_lang_String() || 3729 _class_name == vmSymbols::java_lang_Throwable() || 3730 _class_name == vmSymbols::java_lang_Boolean() || 3731 _class_name == vmSymbols::java_lang_Character() || 3732 _class_name == vmSymbols::java_lang_Float() || 3733 _class_name == vmSymbols::java_lang_Double() || 3734 _class_name == vmSymbols::java_lang_Byte() || 3735 _class_name == vmSymbols::java_lang_Short() || 3736 _class_name == vmSymbols::java_lang_Integer() || 3737 _class_name == vmSymbols::java_lang_Long())) { 3738 allocation_style = 0; // Allocate oops first 3739 compact_fields = false; // Don't compact fields 3740 } 3741 3742 int next_nonstatic_oop_offset = 0; 3743 int next_nonstatic_double_offset = 0; 3744 3745 // Rearrange fields for a given allocation style 3746 if( allocation_style == 0 ) { 3747 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3748 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3749 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3750 (nonstatic_oop_count * heapOopSize); 3751 } else if( allocation_style == 1 ) { 3752 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3753 next_nonstatic_double_offset = next_nonstatic_field_offset; 3754 } else if( allocation_style == 2 ) { 3755 // Fields allocation: oops fields in super and sub classes are together. 3756 if( nonstatic_field_size > 0 && _super_klass != NULL && 3757 _super_klass->nonstatic_oop_map_size() > 0 ) { 3758 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3759 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3760 const OopMapBlock* const last_map = first_map + map_count - 1; 3761 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3762 if (next_offset == next_nonstatic_field_offset) { 3763 allocation_style = 0; // allocate oops first 3764 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3765 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3766 (nonstatic_oop_count * heapOopSize); 3767 } 3768 } 3769 if( allocation_style == 2 ) { 3770 allocation_style = 1; // allocate oops last 3771 next_nonstatic_double_offset = next_nonstatic_field_offset; 3772 } 3773 } else { 3774 ShouldNotReachHere(); 3775 } 3776 3777 int nonstatic_oop_space_count = 0; 3778 int nonstatic_word_space_count = 0; 3779 int nonstatic_short_space_count = 0; 3780 int nonstatic_byte_space_count = 0; 3781 int nonstatic_oop_space_offset = 0; 3782 int nonstatic_word_space_offset = 0; 3783 int nonstatic_short_space_offset = 0; 3784 int nonstatic_byte_space_offset = 0; 3785 3786 // Try to squeeze some of the fields into the gaps due to 3787 // long/double alignment. 3788 if (nonstatic_double_count > 0) { 3789 int offset = next_nonstatic_double_offset; 3790 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3791 if (compact_fields && offset != next_nonstatic_double_offset) { 3792 // Allocate available fields into the gap before double field. 3793 int length = next_nonstatic_double_offset - offset; 3794 assert(length == BytesPerInt, ""); 3795 nonstatic_word_space_offset = offset; 3796 if (nonstatic_word_count > 0) { 3797 nonstatic_word_count -= 1; 3798 nonstatic_word_space_count = 1; // Only one will fit 3799 length -= BytesPerInt; 3800 offset += BytesPerInt; 3801 } 3802 nonstatic_short_space_offset = offset; 3803 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3804 nonstatic_short_count -= 1; 3805 nonstatic_short_space_count += 1; 3806 length -= BytesPerShort; 3807 offset += BytesPerShort; 3808 } 3809 nonstatic_byte_space_offset = offset; 3810 while (length > 0 && nonstatic_byte_count > 0) { 3811 nonstatic_byte_count -= 1; 3812 nonstatic_byte_space_count += 1; 3813 length -= 1; 3814 } 3815 // Allocate oop field in the gap if there are no other fields for that. 3816 nonstatic_oop_space_offset = offset; 3817 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3818 allocation_style != 0) { // when oop fields not first 3819 nonstatic_oop_count -= 1; 3820 nonstatic_oop_space_count = 1; // Only one will fit 3821 length -= heapOopSize; 3822 offset += heapOopSize; 3823 } 3824 } 3825 } 3826 3827 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3828 (nonstatic_double_count * BytesPerLong); 3829 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3830 (nonstatic_word_count * BytesPerInt); 3831 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3832 (nonstatic_short_count * BytesPerShort); 3833 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3834 nonstatic_byte_count; 3835 3836 // let oops jump before padding with this allocation style 3837 if( allocation_style == 1 ) { 3838 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3839 if( nonstatic_oop_count > 0 ) { 3840 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3841 } 3842 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3843 } 3844 3845 // Iterate over fields again and compute correct offsets. 3846 // The field allocation type was temporarily stored in the offset slot. 3847 // oop fields are located before non-oop fields (static and non-static). 3848 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3849 3850 // skip already laid out fields 3851 if (fs.is_offset_set()) continue; 3852 3853 // contended instance fields are handled below 3854 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3855 3856 int real_offset = 0; 3857 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3858 3859 // pack the rest of the fields 3860 switch (atype) { 3861 case STATIC_OOP: 3862 real_offset = next_static_oop_offset; 3863 next_static_oop_offset += heapOopSize; 3864 break; 3865 case STATIC_BYTE: 3866 real_offset = next_static_byte_offset; 3867 next_static_byte_offset += 1; 3868 break; 3869 case STATIC_SHORT: 3870 real_offset = next_static_short_offset; 3871 next_static_short_offset += BytesPerShort; 3872 break; 3873 case STATIC_WORD: 3874 real_offset = next_static_word_offset; 3875 next_static_word_offset += BytesPerInt; 3876 break; 3877 case STATIC_DOUBLE: 3878 real_offset = next_static_double_offset; 3879 next_static_double_offset += BytesPerLong; 3880 break; 3881 case NONSTATIC_OOP: 3882 if( nonstatic_oop_space_count > 0 ) { 3883 real_offset = nonstatic_oop_space_offset; 3884 nonstatic_oop_space_offset += heapOopSize; 3885 nonstatic_oop_space_count -= 1; 3886 } else { 3887 real_offset = next_nonstatic_oop_offset; 3888 next_nonstatic_oop_offset += heapOopSize; 3889 } 3890 3891 // Record this oop in the oop maps 3892 if( nonstatic_oop_map_count > 0 && 3893 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3894 real_offset - 3895 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3896 heapOopSize ) { 3897 // This oop is adjacent to the previous one, add to current oop map 3898 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3899 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3900 } else { 3901 // This oop is not adjacent to the previous one, create new oop map 3902 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3903 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3904 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3905 nonstatic_oop_map_count += 1; 3906 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3907 first_nonstatic_oop_offset = real_offset; 3908 } 3909 } 3910 break; 3911 case NONSTATIC_BYTE: 3912 if( nonstatic_byte_space_count > 0 ) { 3913 real_offset = nonstatic_byte_space_offset; 3914 nonstatic_byte_space_offset += 1; 3915 nonstatic_byte_space_count -= 1; 3916 } else { 3917 real_offset = next_nonstatic_byte_offset; 3918 next_nonstatic_byte_offset += 1; 3919 } 3920 break; 3921 case NONSTATIC_SHORT: 3922 if( nonstatic_short_space_count > 0 ) { 3923 real_offset = nonstatic_short_space_offset; 3924 nonstatic_short_space_offset += BytesPerShort; 3925 nonstatic_short_space_count -= 1; 3926 } else { 3927 real_offset = next_nonstatic_short_offset; 3928 next_nonstatic_short_offset += BytesPerShort; 3929 } 3930 break; 3931 case NONSTATIC_WORD: 3932 if( nonstatic_word_space_count > 0 ) { 3933 real_offset = nonstatic_word_space_offset; 3934 nonstatic_word_space_offset += BytesPerInt; 3935 nonstatic_word_space_count -= 1; 3936 } else { 3937 real_offset = next_nonstatic_word_offset; 3938 next_nonstatic_word_offset += BytesPerInt; 3939 } 3940 break; 3941 case NONSTATIC_DOUBLE: 3942 real_offset = next_nonstatic_double_offset; 3943 next_nonstatic_double_offset += BytesPerLong; 3944 break; 3945 default: 3946 ShouldNotReachHere(); 3947 } 3948 fs.set_offset(real_offset); 3949 } 3950 3951 3952 // Handle the contended cases. 3953 // 3954 // Each contended field should not intersect the cache line with another contended field. 3955 // In the absence of alignment information, we end up with pessimistically separating 3956 // the fields with full-width padding. 3957 // 3958 // Additionally, this should not break alignment for the fields, so we round the alignment up 3959 // for each field. 3960 if (nonstatic_contended_count > 0) { 3961 3962 // if there is at least one contended field, we need to have pre-padding for them 3963 next_nonstatic_padded_offset += ContendedPaddingWidth; 3964 3965 // collect all contended groups 3966 BitMap bm(cp->size()); 3967 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3968 // skip already laid out fields 3969 if (fs.is_offset_set()) continue; 3970 3971 if (fs.is_contended()) { 3972 bm.set_bit(fs.contended_group()); 3973 } 3974 } 3975 3976 int current_group = -1; 3977 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 3978 3979 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3980 3981 // skip already laid out fields 3982 if (fs.is_offset_set()) continue; 3983 3984 // skip non-contended fields and fields from different group 3985 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 3986 3987 // handle statics below 3988 if (fs.access_flags().is_static()) continue; 3989 3990 int real_offset = 0; 3991 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3992 3993 switch (atype) { 3994 case NONSTATIC_BYTE: 3995 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 3996 real_offset = next_nonstatic_padded_offset; 3997 next_nonstatic_padded_offset += 1; 3998 break; 3999 4000 case NONSTATIC_SHORT: 4001 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4002 real_offset = next_nonstatic_padded_offset; 4003 next_nonstatic_padded_offset += BytesPerShort; 4004 break; 4005 4006 case NONSTATIC_WORD: 4007 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4008 real_offset = next_nonstatic_padded_offset; 4009 next_nonstatic_padded_offset += BytesPerInt; 4010 break; 4011 4012 case NONSTATIC_DOUBLE: 4013 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4014 real_offset = next_nonstatic_padded_offset; 4015 next_nonstatic_padded_offset += BytesPerLong; 4016 break; 4017 4018 case NONSTATIC_OOP: 4019 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4020 real_offset = next_nonstatic_padded_offset; 4021 next_nonstatic_padded_offset += heapOopSize; 4022 4023 // Record this oop in the oop maps 4024 if( nonstatic_oop_map_count > 0 && 4025 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4026 real_offset - 4027 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4028 heapOopSize ) { 4029 // This oop is adjacent to the previous one, add to current oop map 4030 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4031 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4032 } else { 4033 // This oop is not adjacent to the previous one, create new oop map 4034 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4035 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4036 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4037 nonstatic_oop_map_count += 1; 4038 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4039 first_nonstatic_oop_offset = real_offset; 4040 } 4041 } 4042 break; 4043 4044 default: 4045 ShouldNotReachHere(); 4046 } 4047 4048 if (fs.contended_group() == 0) { 4049 // Contended group defines the equivalence class over the fields: 4050 // the fields within the same contended group are not inter-padded. 4051 // The only exception is default group, which does not incur the 4052 // equivalence, and so requires intra-padding. 4053 next_nonstatic_padded_offset += ContendedPaddingWidth; 4054 } 4055 4056 fs.set_offset(real_offset); 4057 } // for 4058 4059 // Start laying out the next group. 4060 // Note that this will effectively pad the last group in the back; 4061 // this is expected to alleviate memory contention effects for 4062 // subclass fields and/or adjacent object. 4063 // If this was the default group, the padding is already in place. 4064 if (current_group != 0) { 4065 next_nonstatic_padded_offset += ContendedPaddingWidth; 4066 } 4067 } 4068 4069 // handle static fields 4070 } 4071 4072 // Entire class is contended, pad in the back. 4073 // This helps to alleviate memory contention effects for subclass fields 4074 // and/or adjacent object. 4075 if (is_contended_class) { 4076 next_nonstatic_padded_offset += ContendedPaddingWidth; 4077 } 4078 4079 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4080 4081 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); 4082 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4083 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4084 4085 int static_field_size = (static_fields_end - 4086 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4087 nonstatic_field_size = nonstatic_field_size + 4088 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4089 4090 int instance_size = align_object_size(instance_end / wordSize); 4091 4092 assert(instance_size == align_object_size(align_size_up( 4093 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4094 wordSize) / wordSize), "consistent layout helper value"); 4095 4096 // Invariant: nonstatic_field end/start should only change if there are 4097 // nonstatic fields in the class, or if the class is contended. We compare 4098 // against the non-aligned value, so that end alignment will not fail the 4099 // assert without actually having the fields. 4100 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4101 is_contended_class || 4102 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4103 4104 // Number of non-static oop map blocks allocated at end of klass. 4105 const unsigned int total_oop_map_count = 4106 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4107 first_nonstatic_oop_offset); 4108 4109#ifndef PRODUCT 4110 if (PrintFieldLayout) { 4111 print_field_layout(_class_name, 4112 _fields, 4113 cp, 4114 instance_size, 4115 nonstatic_fields_start, 4116 nonstatic_fields_end, 4117 static_fields_end); 4118 } 4119 4120#endif 4121 // Pass back information needed for InstanceKlass creation 4122 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4123 info->nonstatic_oop_counts = nonstatic_oop_counts; 4124 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4125 info->total_oop_map_count = total_oop_map_count; 4126 info->instance_size = instance_size; 4127 info->static_field_size = static_field_size; 4128 info->nonstatic_field_size = nonstatic_field_size; 4129 info->has_nonstatic_fields = has_nonstatic_fields; 4130} 4131 4132static void fill_oop_maps(const InstanceKlass* k, 4133 unsigned int nonstatic_oop_map_count, 4134 const int* nonstatic_oop_offsets, 4135 const unsigned int* nonstatic_oop_counts) { 4136 4137 assert(k != NULL, "invariant"); 4138 4139 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4140 const InstanceKlass* const super = k->superklass(); 4141 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4142 if (super_count > 0) { 4143 // Copy maps from superklass 4144 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4145 for (unsigned int i = 0; i < super_count; ++i) { 4146 *this_oop_map++ = *super_oop_map++; 4147 } 4148 } 4149 4150 if (nonstatic_oop_map_count > 0) { 4151 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4152 // The counts differ because there is no gap between superklass's last oop 4153 // field and the first local oop field. Extend the last oop map copied 4154 // from the superklass instead of creating new one. 4155 nonstatic_oop_map_count--; 4156 nonstatic_oop_offsets++; 4157 this_oop_map--; 4158 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4159 this_oop_map++; 4160 } 4161 4162 // Add new map blocks, fill them 4163 while (nonstatic_oop_map_count-- > 0) { 4164 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4165 this_oop_map->set_count(*nonstatic_oop_counts++); 4166 this_oop_map++; 4167 } 4168 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4169 this_oop_map, "sanity"); 4170 } 4171} 4172 4173 4174void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4175 assert(ik != NULL, "invariant"); 4176 4177 const Klass* const super = ik->super(); 4178 4179 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4180 // in which case we don't have to register objects as finalizable 4181 if (!_has_empty_finalizer) { 4182 if (_has_finalizer || 4183 (super != NULL && super->has_finalizer())) { 4184 ik->set_has_finalizer(); 4185 } 4186 } 4187 4188#ifdef ASSERT 4189 bool f = false; 4190 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4191 vmSymbols::void_method_signature()); 4192 if (m != NULL && !m->is_empty_method()) { 4193 f = true; 4194 } 4195 4196 // Spec doesn't prevent agent from redefinition of empty finalizer. 4197 // Despite the fact that it's generally bad idea and redefined finalizer 4198 // will not work as expected we shouldn't abort vm in this case 4199 if (!ik->has_redefined_this_or_super()) { 4200 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4201 } 4202#endif 4203 4204 // Check if this klass supports the java.lang.Cloneable interface 4205 if (SystemDictionary::Cloneable_klass_loaded()) { 4206 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4207 ik->set_is_cloneable(); 4208 } 4209 } 4210 4211 // Check if this klass has a vanilla default constructor 4212 if (super == NULL) { 4213 // java.lang.Object has empty default constructor 4214 ik->set_has_vanilla_constructor(); 4215 } else { 4216 if (super->has_vanilla_constructor() && 4217 _has_vanilla_constructor) { 4218 ik->set_has_vanilla_constructor(); 4219 } 4220#ifdef ASSERT 4221 bool v = false; 4222 if (super->has_vanilla_constructor()) { 4223 const Method* const constructor = 4224 ik->find_method(vmSymbols::object_initializer_name(), 4225 vmSymbols::void_method_signature()); 4226 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4227 v = true; 4228 } 4229 } 4230 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4231#endif 4232 } 4233 4234 // If it cannot be fast-path allocated, set a bit in the layout helper. 4235 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4236 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4237 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4238 || ik->is_abstract() || ik->is_interface() 4239 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4240 || ik->size_helper() >= FastAllocateSizeLimit) { 4241 // Forbid fast-path allocation. 4242 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4243 ik->set_layout_helper(lh); 4244 } 4245} 4246 4247// Attach super classes and interface classes to class loader data 4248static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4249 TRAPS) { 4250 assert(defined_klass != NULL, "invariant"); 4251 4252 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4253 if (defining_loader_data->is_the_null_class_loader_data()) { 4254 // Dependencies to null class loader data are implicit. 4255 return; 4256 } else { 4257 // add super class dependency 4258 Klass* const super = defined_klass->super(); 4259 if (super != NULL) { 4260 defining_loader_data->record_dependency(super, CHECK); 4261 } 4262 4263 // add super interface dependencies 4264 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4265 if (local_interfaces != NULL) { 4266 const int length = local_interfaces->length(); 4267 for (int i = 0; i < length; i++) { 4268 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4269 } 4270 } 4271 } 4272} 4273 4274// utility methods for appending an array with check for duplicates 4275 4276static void append_interfaces(GrowableArray<Klass*>* result, 4277 const Array<Klass*>* const ifs) { 4278 // iterate over new interfaces 4279 for (int i = 0; i < ifs->length(); i++) { 4280 Klass* const e = ifs->at(i); 4281 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4282 // add new interface 4283 result->append_if_missing(e); 4284 } 4285} 4286 4287static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4288 Array<Klass*>* local_ifs, 4289 ClassLoaderData* loader_data, 4290 TRAPS) { 4291 assert(local_ifs != NULL, "invariant"); 4292 assert(loader_data != NULL, "invariant"); 4293 4294 // Compute maximum size for transitive interfaces 4295 int max_transitive_size = 0; 4296 int super_size = 0; 4297 // Add superclass transitive interfaces size 4298 if (super != NULL) { 4299 super_size = super->transitive_interfaces()->length(); 4300 max_transitive_size += super_size; 4301 } 4302 // Add local interfaces' super interfaces 4303 const int local_size = local_ifs->length(); 4304 for (int i = 0; i < local_size; i++) { 4305 Klass* const l = local_ifs->at(i); 4306 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4307 } 4308 // Finally add local interfaces 4309 max_transitive_size += local_size; 4310 // Construct array 4311 if (max_transitive_size == 0) { 4312 // no interfaces, use canonicalized array 4313 return Universe::the_empty_klass_array(); 4314 } else if (max_transitive_size == super_size) { 4315 // no new local interfaces added, share superklass' transitive interface array 4316 return super->transitive_interfaces(); 4317 } else if (max_transitive_size == local_size) { 4318 // only local interfaces added, share local interface array 4319 return local_ifs; 4320 } else { 4321 ResourceMark rm; 4322 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4323 4324 // Copy down from superclass 4325 if (super != NULL) { 4326 append_interfaces(result, super->transitive_interfaces()); 4327 } 4328 4329 // Copy down from local interfaces' superinterfaces 4330 for (int i = 0; i < local_size; i++) { 4331 Klass* const l = local_ifs->at(i); 4332 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4333 } 4334 // Finally add local interfaces 4335 append_interfaces(result, local_ifs); 4336 4337 // length will be less than the max_transitive_size if duplicates were removed 4338 const int length = result->length(); 4339 assert(length <= max_transitive_size, "just checking"); 4340 Array<Klass*>* const new_result = 4341 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4342 for (int i = 0; i < length; i++) { 4343 Klass* const e = result->at(i); 4344 assert(e != NULL, "just checking"); 4345 new_result->at_put(i, e); 4346 } 4347 return new_result; 4348 } 4349} 4350 4351static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4352 assert(this_klass != NULL, "invariant"); 4353 const Klass* const super = this_klass->super(); 4354 if ((super != NULL) && 4355 (!Reflection::verify_class_access(this_klass, super, false))) { 4356 ResourceMark rm(THREAD); 4357 Exceptions::fthrow( 4358 THREAD_AND_LOCATION, 4359 vmSymbols::java_lang_IllegalAccessError(), 4360 "class %s cannot access its superclass %s", 4361 this_klass->external_name(), 4362 super->external_name() 4363 ); 4364 return; 4365 } 4366} 4367 4368 4369static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4370 assert(this_klass != NULL, "invariant"); 4371 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4372 const int lng = local_interfaces->length(); 4373 for (int i = lng - 1; i >= 0; i--) { 4374 Klass* const k = local_interfaces->at(i); 4375 assert (k != NULL && k->is_interface(), "invalid interface"); 4376 if (!Reflection::verify_class_access(this_klass, k, false)) { 4377 ResourceMark rm(THREAD); 4378 Exceptions::fthrow( 4379 THREAD_AND_LOCATION, 4380 vmSymbols::java_lang_IllegalAccessError(), 4381 "class %s cannot access its superinterface %s", 4382 this_klass->external_name(), 4383 k->external_name() 4384 ); 4385 return; 4386 } 4387 } 4388} 4389 4390 4391static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4392 assert(this_klass != NULL, "invariant"); 4393 const Array<Method*>* const methods = this_klass->methods(); 4394 const int num_methods = methods->length(); 4395 4396 // go thru each method and check if it overrides a final method 4397 for (int index = 0; index < num_methods; index++) { 4398 const Method* const m = methods->at(index); 4399 4400 // skip private, static, and <init> methods 4401 if ((!m->is_private() && !m->is_static()) && 4402 (m->name() != vmSymbols::object_initializer_name())) { 4403 4404 const Symbol* const name = m->name(); 4405 const Symbol* const signature = m->signature(); 4406 const Klass* k = this_klass->super(); 4407 const Method* super_m = NULL; 4408 while (k != NULL) { 4409 // skip supers that don't have final methods. 4410 if (k->has_final_method()) { 4411 // lookup a matching method in the super class hierarchy 4412 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4413 if (super_m == NULL) { 4414 break; // didn't find any match; get out 4415 } 4416 4417 if (super_m->is_final() && !super_m->is_static() && 4418 // matching method in super is final, and not static 4419 (Reflection::verify_field_access(this_klass, 4420 super_m->method_holder(), 4421 super_m->method_holder(), 4422 super_m->access_flags(), false)) 4423 // this class can access super final method and therefore override 4424 ) { 4425 ResourceMark rm(THREAD); 4426 Exceptions::fthrow( 4427 THREAD_AND_LOCATION, 4428 vmSymbols::java_lang_VerifyError(), 4429 "class %s overrides final method %s.%s%s", 4430 this_klass->external_name(), 4431 super_m->method_holder()->external_name(), 4432 name->as_C_string(), 4433 signature->as_C_string() 4434 ); 4435 return; 4436 } 4437 4438 // continue to look from super_m's holder's super. 4439 k = super_m->method_holder()->super(); 4440 continue; 4441 } 4442 4443 k = k->super(); 4444 } 4445 } 4446 } 4447} 4448 4449 4450// assumes that this_klass is an interface 4451static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4452 assert(this_klass != NULL, "invariant"); 4453 assert(this_klass->is_interface(), "not an interface"); 4454 const Array<Method*>* methods = this_klass->methods(); 4455 const int num_methods = methods->length(); 4456 4457 for (int index = 0; index < num_methods; index++) { 4458 const Method* const m = methods->at(index); 4459 // if m is static and not the init method, throw a verify error 4460 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4461 ResourceMark rm(THREAD); 4462 Exceptions::fthrow( 4463 THREAD_AND_LOCATION, 4464 vmSymbols::java_lang_VerifyError(), 4465 "Illegal static method %s in interface %s", 4466 m->name()->as_C_string(), 4467 this_klass->external_name() 4468 ); 4469 return; 4470 } 4471 } 4472} 4473 4474// utility methods for format checking 4475 4476void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4477 if (!_need_verify) { return; } 4478 4479 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4480 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4481 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4482 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4483 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4484 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4485 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4486 4487 if ((is_abstract && is_final) || 4488 (is_interface && !is_abstract) || 4489 (is_interface && major_gte_15 && (is_super || is_enum)) || 4490 (!is_interface && major_gte_15 && is_annotation)) { 4491 ResourceMark rm(THREAD); 4492 Exceptions::fthrow( 4493 THREAD_AND_LOCATION, 4494 vmSymbols::java_lang_ClassFormatError(), 4495 "Illegal class modifiers in class %s: 0x%X", 4496 _class_name->as_C_string(), flags 4497 ); 4498 return; 4499 } 4500} 4501 4502static bool has_illegal_visibility(jint flags) { 4503 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4504 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4505 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4506 4507 return ((is_public && is_protected) || 4508 (is_public && is_private) || 4509 (is_protected && is_private)); 4510} 4511 4512static bool is_supported_version(u2 major, u2 minor){ 4513 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4514 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4515 (major <= max_version) && 4516 ((major != max_version) || 4517 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4518} 4519 4520void ClassFileParser::verify_legal_field_modifiers(jint flags, 4521 bool is_interface, 4522 TRAPS) const { 4523 if (!_need_verify) { return; } 4524 4525 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4526 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4527 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4528 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4529 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4530 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4531 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4532 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4533 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4534 4535 bool is_illegal = false; 4536 4537 if (is_interface) { 4538 if (!is_public || !is_static || !is_final || is_private || 4539 is_protected || is_volatile || is_transient || 4540 (major_gte_15 && is_enum)) { 4541 is_illegal = true; 4542 } 4543 } else { // not interface 4544 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4545 is_illegal = true; 4546 } 4547 } 4548 4549 if (is_illegal) { 4550 ResourceMark rm(THREAD); 4551 Exceptions::fthrow( 4552 THREAD_AND_LOCATION, 4553 vmSymbols::java_lang_ClassFormatError(), 4554 "Illegal field modifiers in class %s: 0x%X", 4555 _class_name->as_C_string(), flags); 4556 return; 4557 } 4558} 4559 4560void ClassFileParser::verify_legal_method_modifiers(jint flags, 4561 bool is_interface, 4562 const Symbol* name, 4563 TRAPS) const { 4564 if (!_need_verify) { return; } 4565 4566 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4567 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4568 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4569 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4570 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4571 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4572 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4573 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4574 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4575 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4576 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4577 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4578 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4579 4580 bool is_illegal = false; 4581 4582 if (is_interface) { 4583 if (major_gte_8) { 4584 // Class file version is JAVA_8_VERSION or later Methods of 4585 // interfaces may set any of the flags except ACC_PROTECTED, 4586 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4587 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4588 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4589 (is_native || is_protected || is_final || is_synchronized) || 4590 // If a specific method of a class or interface has its 4591 // ACC_ABSTRACT flag set, it must not have any of its 4592 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4593 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4594 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4595 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4596 (is_abstract && (is_private || is_static || is_strict))) { 4597 is_illegal = true; 4598 } 4599 } else if (major_gte_15) { 4600 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4601 if (!is_public || is_static || is_final || is_synchronized || 4602 is_native || !is_abstract || is_strict) { 4603 is_illegal = true; 4604 } 4605 } else { 4606 // Class file version is pre-JAVA_1_5_VERSION 4607 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4608 is_illegal = true; 4609 } 4610 } 4611 } else { // not interface 4612 if (has_illegal_visibility(flags)) { 4613 is_illegal = true; 4614 } else { 4615 if (is_initializer) { 4616 if (is_static || is_final || is_synchronized || is_native || 4617 is_abstract || (major_gte_15 && is_bridge)) { 4618 is_illegal = true; 4619 } 4620 } else { // not initializer 4621 if (is_abstract) { 4622 if ((is_final || is_native || is_private || is_static || 4623 (major_gte_15 && (is_synchronized || is_strict)))) { 4624 is_illegal = true; 4625 } 4626 } 4627 } 4628 } 4629 } 4630 4631 if (is_illegal) { 4632 ResourceMark rm(THREAD); 4633 Exceptions::fthrow( 4634 THREAD_AND_LOCATION, 4635 vmSymbols::java_lang_ClassFormatError(), 4636 "Method %s in class %s has illegal modifiers: 0x%X", 4637 name->as_C_string(), _class_name->as_C_string(), flags); 4638 return; 4639 } 4640} 4641 4642void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4643 int length, 4644 TRAPS) const { 4645 assert(_need_verify, "only called when _need_verify is true"); 4646 int i = 0; 4647 const int count = length >> 2; 4648 for (int k=0; k<count; k++) { 4649 unsigned char b0 = buffer[i]; 4650 unsigned char b1 = buffer[i+1]; 4651 unsigned char b2 = buffer[i+2]; 4652 unsigned char b3 = buffer[i+3]; 4653 // For an unsigned char v, 4654 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; 4655 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. 4656 const unsigned char res = b0 | b0 - 1 | 4657 b1 | b1 - 1 | 4658 b2 | b2 - 1 | 4659 b3 | b3 - 1; 4660 if (res >= 128) break; 4661 i += 4; 4662 } 4663 for(; i < length; i++) { 4664 unsigned short c; 4665 // no embedded zeros 4666 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); 4667 if(buffer[i] < 128) { 4668 continue; 4669 } 4670 if ((i + 5) < length) { // see if it's legal supplementary character 4671 if (UTF8::is_supplementary_character(&buffer[i])) { 4672 c = UTF8::get_supplementary_character(&buffer[i]); 4673 i += 5; 4674 continue; 4675 } 4676 } 4677 switch (buffer[i] >> 4) { 4678 default: break; 4679 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: 4680 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4681 case 0xC: case 0xD: // 110xxxxx 10xxxxxx 4682 c = (buffer[i] & 0x1F) << 6; 4683 i++; 4684 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { 4685 c += buffer[i] & 0x3F; 4686 if (_major_version <= 47 || c == 0 || c >= 0x80) { 4687 // for classes with major > 47, c must a null or a character in its shortest form 4688 break; 4689 } 4690 } 4691 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4692 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx 4693 c = (buffer[i] & 0xF) << 12; 4694 i += 2; 4695 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { 4696 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); 4697 if (_major_version <= 47 || c >= 0x800) { 4698 // for classes with major > 47, c must be in its shortest form 4699 break; 4700 } 4701 } 4702 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4703 } // end of switch 4704 } // end of for 4705} 4706 4707// Unqualified names may not contain the characters '.', ';', '[', or '/'. 4708// Method names also may not contain the characters '<' or '>', unless <init> 4709// or <clinit>. Note that method names may not be <init> or <clinit> in this 4710// method. Because these names have been checked as special cases before 4711// calling this method in verify_legal_method_name. 4712static bool verify_unqualified_name(const char* name, 4713 unsigned int length, 4714 int type) { 4715 for (const char* p = name; p != name + length;) { 4716 jchar ch = *p; 4717 if (ch < 128) { 4718 p++; 4719 if (ch == '.' || ch == ';' || ch == '[') { 4720 return false; // do not permit '.', ';', or '[' 4721 } 4722 if (type != LegalClass && ch == '/') { 4723 return false; // do not permit '/' unless it's class name 4724 } 4725 if (type == LegalMethod && (ch == '<' || ch == '>')) { 4726 return false; // do not permit '<' or '>' in method names 4727 } 4728 } 4729 else { 4730 char* tmp_p = UTF8::next(p, &ch); 4731 p = tmp_p; 4732 } 4733 } 4734 return true; 4735} 4736 4737// Take pointer to a string. Skip over the longest part of the string that could 4738// be taken as a fieldname. Allow '/' if slash_ok is true. 4739// Return a pointer to just past the fieldname. 4740// Return NULL if no fieldname at all was found, or in the case of slash_ok 4741// being true, we saw consecutive slashes (meaning we were looking for a 4742// qualified path but found something that was badly-formed). 4743static const char* skip_over_field_name(const char* name, 4744 bool slash_ok, 4745 unsigned int length) { 4746 const char* p; 4747 jboolean last_is_slash = false; 4748 jboolean not_first_ch = false; 4749 4750 for (p = name; p != name + length; not_first_ch = true) { 4751 const char* old_p = p; 4752 jchar ch = *p; 4753 if (ch < 128) { 4754 p++; 4755 // quick check for ascii 4756 if ((ch >= 'a' && ch <= 'z') || 4757 (ch >= 'A' && ch <= 'Z') || 4758 (ch == '_' || ch == '$') || 4759 (not_first_ch && ch >= '0' && ch <= '9')) { 4760 last_is_slash = false; 4761 continue; 4762 } 4763 if (slash_ok && ch == '/') { 4764 if (last_is_slash) { 4765 return NULL; // Don't permit consecutive slashes 4766 } 4767 last_is_slash = true; 4768 continue; 4769 } 4770 } 4771 else { 4772 jint unicode_ch; 4773 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4774 p = tmp_p; 4775 last_is_slash = false; 4776 // Check if ch is Java identifier start or is Java identifier part 4777 // 4672820: call java.lang.Character methods directly without generating separate tables. 4778 EXCEPTION_MARK; 4779 4780 // return value 4781 JavaValue result(T_BOOLEAN); 4782 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4783 JavaCallArguments args; 4784 args.push_int(unicode_ch); 4785 4786 // public static boolean isJavaIdentifierStart(char ch); 4787 JavaCalls::call_static(&result, 4788 SystemDictionary::Character_klass(), 4789 vmSymbols::isJavaIdentifierStart_name(), 4790 vmSymbols::int_bool_signature(), 4791 &args, 4792 THREAD); 4793 4794 if (HAS_PENDING_EXCEPTION) { 4795 CLEAR_PENDING_EXCEPTION; 4796 return 0; 4797 } 4798 if (result.get_jboolean()) { 4799 continue; 4800 } 4801 4802 if (not_first_ch) { 4803 // public static boolean isJavaIdentifierPart(char ch); 4804 JavaCalls::call_static(&result, 4805 SystemDictionary::Character_klass(), 4806 vmSymbols::isJavaIdentifierPart_name(), 4807 vmSymbols::int_bool_signature(), 4808 &args, 4809 THREAD); 4810 4811 if (HAS_PENDING_EXCEPTION) { 4812 CLEAR_PENDING_EXCEPTION; 4813 return 0; 4814 } 4815 4816 if (result.get_jboolean()) { 4817 continue; 4818 } 4819 } 4820 } 4821 return (not_first_ch) ? old_p : NULL; 4822 } 4823 return (not_first_ch) ? p : NULL; 4824} 4825 4826// Take pointer to a string. Skip over the longest part of the string that could 4827// be taken as a field signature. Allow "void" if void_ok. 4828// Return a pointer to just past the signature. 4829// Return NULL if no legal signature is found. 4830const char* ClassFileParser::skip_over_field_signature(const char* signature, 4831 bool void_ok, 4832 unsigned int length, 4833 TRAPS) const { 4834 unsigned int array_dim = 0; 4835 while (length > 0) { 4836 switch (signature[0]) { 4837 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4838 case JVM_SIGNATURE_BOOLEAN: 4839 case JVM_SIGNATURE_BYTE: 4840 case JVM_SIGNATURE_CHAR: 4841 case JVM_SIGNATURE_SHORT: 4842 case JVM_SIGNATURE_INT: 4843 case JVM_SIGNATURE_FLOAT: 4844 case JVM_SIGNATURE_LONG: 4845 case JVM_SIGNATURE_DOUBLE: 4846 return signature + 1; 4847 case JVM_SIGNATURE_CLASS: { 4848 if (_major_version < JAVA_1_5_VERSION) { 4849 // Skip over the class name if one is there 4850 const char* const p = skip_over_field_name(signature + 1, true, --length); 4851 4852 // The next character better be a semicolon 4853 if (p && (p - signature) > 1 && p[0] == ';') { 4854 return p + 1; 4855 } 4856 } 4857 else { 4858 // 4900761: For class version > 48, any unicode is allowed in class name. 4859 length--; 4860 signature++; 4861 while (length > 0 && signature[0] != ';') { 4862 if (signature[0] == '.') { 4863 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); 4864 } 4865 length--; 4866 signature++; 4867 } 4868 if (signature[0] == ';') { return signature + 1; } 4869 } 4870 4871 return NULL; 4872 } 4873 case JVM_SIGNATURE_ARRAY: 4874 array_dim++; 4875 if (array_dim > 255) { 4876 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4877 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4878 } 4879 // The rest of what's there better be a legal signature 4880 signature++; 4881 length--; 4882 void_ok = false; 4883 break; 4884 4885 default: 4886 return NULL; 4887 } 4888 } 4889 return NULL; 4890} 4891 4892// Checks if name is a legal class name. 4893void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4894 if (!_need_verify || _relax_verify) { return; } 4895 4896 char buf[fixed_buffer_size]; 4897 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4898 unsigned int length = name->utf8_length(); 4899 bool legal = false; 4900 4901 if (length > 0) { 4902 const char* p; 4903 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4904 p = skip_over_field_signature(bytes, false, length, CHECK); 4905 legal = (p != NULL) && ((p - bytes) == (int)length); 4906 } else if (_major_version < JAVA_1_5_VERSION) { 4907 if (bytes[0] != '<') { 4908 p = skip_over_field_name(bytes, true, length); 4909 legal = (p != NULL) && ((p - bytes) == (int)length); 4910 } 4911 } else { 4912 // 4900761: relax the constraints based on JSR202 spec 4913 // Class names may be drawn from the entire Unicode character set. 4914 // Identifiers between '/' must be unqualified names. 4915 // The utf8 string has been verified when parsing cpool entries. 4916 legal = verify_unqualified_name(bytes, length, LegalClass); 4917 } 4918 } 4919 if (!legal) { 4920 ResourceMark rm(THREAD); 4921 assert(_class_name != NULL, "invariant"); 4922 Exceptions::fthrow( 4923 THREAD_AND_LOCATION, 4924 vmSymbols::java_lang_ClassFormatError(), 4925 "Illegal class name \"%s\" in class file %s", bytes, 4926 _class_name->as_C_string() 4927 ); 4928 return; 4929 } 4930} 4931 4932// Checks if name is a legal field name. 4933void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 4934 if (!_need_verify || _relax_verify) { return; } 4935 4936 char buf[fixed_buffer_size]; 4937 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4938 unsigned int length = name->utf8_length(); 4939 bool legal = false; 4940 4941 if (length > 0) { 4942 if (_major_version < JAVA_1_5_VERSION) { 4943 if (bytes[0] != '<') { 4944 const char* p = skip_over_field_name(bytes, false, length); 4945 legal = (p != NULL) && ((p - bytes) == (int)length); 4946 } 4947 } else { 4948 // 4881221: relax the constraints based on JSR202 spec 4949 legal = verify_unqualified_name(bytes, length, LegalField); 4950 } 4951 } 4952 4953 if (!legal) { 4954 ResourceMark rm(THREAD); 4955 assert(_class_name != NULL, "invariant"); 4956 Exceptions::fthrow( 4957 THREAD_AND_LOCATION, 4958 vmSymbols::java_lang_ClassFormatError(), 4959 "Illegal field name \"%s\" in class %s", bytes, 4960 _class_name->as_C_string() 4961 ); 4962 return; 4963 } 4964} 4965 4966// Checks if name is a legal method name. 4967void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 4968 if (!_need_verify || _relax_verify) { return; } 4969 4970 assert(name != NULL, "method name is null"); 4971 char buf[fixed_buffer_size]; 4972 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4973 unsigned int length = name->utf8_length(); 4974 bool legal = false; 4975 4976 if (length > 0) { 4977 if (bytes[0] == '<') { 4978 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 4979 legal = true; 4980 } 4981 } else if (_major_version < JAVA_1_5_VERSION) { 4982 const char* p; 4983 p = skip_over_field_name(bytes, false, length); 4984 legal = (p != NULL) && ((p - bytes) == (int)length); 4985 } else { 4986 // 4881221: relax the constraints based on JSR202 spec 4987 legal = verify_unqualified_name(bytes, length, LegalMethod); 4988 } 4989 } 4990 4991 if (!legal) { 4992 ResourceMark rm(THREAD); 4993 assert(_class_name != NULL, "invariant"); 4994 Exceptions::fthrow( 4995 THREAD_AND_LOCATION, 4996 vmSymbols::java_lang_ClassFormatError(), 4997 "Illegal method name \"%s\" in class %s", bytes, 4998 _class_name->as_C_string() 4999 ); 5000 return; 5001 } 5002} 5003 5004 5005// Checks if signature is a legal field signature. 5006void ClassFileParser::verify_legal_field_signature(const Symbol* name, 5007 const Symbol* signature, 5008 TRAPS) const { 5009 if (!_need_verify) { return; } 5010 5011 char buf[fixed_buffer_size]; 5012 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5013 const unsigned int length = signature->utf8_length(); 5014 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5015 5016 if (p == NULL || (p - bytes) != (int)length) { 5017 throwIllegalSignature("Field", name, signature, CHECK); 5018 } 5019} 5020 5021// Checks if signature is a legal method signature. 5022// Returns number of parameters 5023int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5024 const Symbol* signature, 5025 TRAPS) const { 5026 if (!_need_verify) { 5027 // make sure caller's args_size will be less than 0 even for non-static 5028 // method so it will be recomputed in compute_size_of_parameters(). 5029 return -2; 5030 } 5031 5032 // Class initializers cannot have args for class format version >= 51. 5033 if (name == vmSymbols::class_initializer_name() && 5034 signature != vmSymbols::void_method_signature() && 5035 _major_version >= JAVA_7_VERSION) { 5036 throwIllegalSignature("Method", name, signature, CHECK_0); 5037 return 0; 5038 } 5039 5040 unsigned int args_size = 0; 5041 char buf[fixed_buffer_size]; 5042 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5043 unsigned int length = signature->utf8_length(); 5044 const char* nextp; 5045 5046 // The first character must be a '(' 5047 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5048 length--; 5049 // Skip over legal field signatures 5050 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5051 while ((length > 0) && (nextp != NULL)) { 5052 args_size++; 5053 if (p[0] == 'J' || p[0] == 'D') { 5054 args_size++; 5055 } 5056 length -= nextp - p; 5057 p = nextp; 5058 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5059 } 5060 // The first non-signature thing better be a ')' 5061 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5062 length--; 5063 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5064 // All internal methods must return void 5065 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5066 return args_size; 5067 } 5068 } else { 5069 // Now we better just have a return value 5070 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5071 if (nextp && ((int)length == (nextp - p))) { 5072 return args_size; 5073 } 5074 } 5075 } 5076 } 5077 // Report error 5078 throwIllegalSignature("Method", name, signature, CHECK_0); 5079 return 0; 5080} 5081 5082int ClassFileParser::static_field_size() const { 5083 assert(_field_info != NULL, "invariant"); 5084 return _field_info->static_field_size; 5085} 5086 5087int ClassFileParser::total_oop_map_count() const { 5088 assert(_field_info != NULL, "invariant"); 5089 return _field_info->total_oop_map_count; 5090} 5091 5092jint ClassFileParser::layout_size() const { 5093 assert(_field_info != NULL, "invariant"); 5094 return _field_info->instance_size; 5095} 5096 5097static void check_methods_for_intrinsics(const InstanceKlass* ik, 5098 const Array<Method*>* methods) { 5099 assert(ik != NULL, "invariant"); 5100 assert(methods != NULL, "invariant"); 5101 5102 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5103 // (We used to do this lazily, but now we query it in Rewriter, 5104 // which is eagerly done for every method, so we might as well do it now, 5105 // when everything is fresh in memory.) 5106 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5107 5108 if (klass_id != vmSymbols::NO_SID) { 5109 for (int j = 0; j < methods->length(); ++j) { 5110 Method* method = methods->at(j); 5111 method->init_intrinsic_id(); 5112 5113 if (CheckIntrinsics) { 5114 // Check if an intrinsic is defined for method 'method', 5115 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5116 if (method->intrinsic_id() != vmIntrinsics::_none && 5117 !method->intrinsic_candidate()) { 5118 tty->print("Compiler intrinsic is defined for method [%s], " 5119 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5120 method->name_and_sig_as_C_string(), 5121 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5122 ); 5123 tty->cr(); 5124 DEBUG_ONLY(vm_exit(1)); 5125 } 5126 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5127 // but there is no intrinsic available for it. 5128 if (method->intrinsic_candidate() && 5129 method->intrinsic_id() == vmIntrinsics::_none) { 5130 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5131 "but no compiler intrinsic is defined for the method.%s", 5132 method->name_and_sig_as_C_string(), 5133 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5134 ); 5135 tty->cr(); 5136 DEBUG_ONLY(vm_exit(1)); 5137 } 5138 } 5139 } // end for 5140 5141#ifdef ASSERT 5142 if (CheckIntrinsics) { 5143 // Check for orphan methods in the current class. A method m 5144 // of a class C is orphan if an intrinsic is defined for method m, 5145 // but class C does not declare m. 5146 // The check is potentially expensive, therefore it is available 5147 // only in debug builds. 5148 5149 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5150 if (vmIntrinsics::_compiledLambdaForm == id) { 5151 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5152 // generated for the JVM from a LambdaForm and therefore no method 5153 // is defined for it. 5154 continue; 5155 } 5156 5157 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5158 // Check if the current class contains a method with the same 5159 // name, flags, signature. 5160 bool match = false; 5161 for (int j = 0; j < methods->length(); ++j) { 5162 const Method* method = methods->at(j); 5163 if (method->intrinsic_id() == id) { 5164 match = true; 5165 break; 5166 } 5167 } 5168 5169 if (!match) { 5170 char buf[1000]; 5171 tty->print("Compiler intrinsic is defined for method [%s], " 5172 "but the method is not available in class [%s].%s", 5173 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5174 buf, sizeof(buf)), 5175 ik->name()->as_C_string(), 5176 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5177 ); 5178 tty->cr(); 5179 DEBUG_ONLY(vm_exit(1)); 5180 } 5181 } 5182 } // end for 5183 } // CheckIntrinsics 5184#endif // ASSERT 5185 } 5186} 5187 5188InstanceKlass* ClassFileParser::create_instance_klass(TRAPS) { 5189 if (_klass != NULL) { 5190 return _klass; 5191 } 5192 5193 InstanceKlass* const ik = 5194 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5195 5196 fill_instance_klass(ik, CHECK_NULL); 5197 5198 assert(_klass == ik, "invariant"); 5199 5200 return ik; 5201} 5202 5203void ClassFileParser::fill_instance_klass(InstanceKlass* ik, TRAPS) { 5204 assert(ik != NULL, "invariant"); 5205 5206 set_klass_to_deallocate(ik); 5207 5208 assert(_field_info != NULL, "invariant"); 5209 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5210 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5211 "sanity"); 5212 5213 assert(ik->is_instance_klass(), "sanity"); 5214 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5215 5216 // Fill in information already parsed 5217 ik->set_should_verify_class(_need_verify); 5218 5219 // Not yet: supers are done below to support the new subtype-checking fields 5220 ik->set_class_loader_data(_loader_data); 5221 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5222 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5223 assert(_fac != NULL, "invariant"); 5224 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5225 5226 // this transfers ownership of a lot of arrays from 5227 // the parser onto the InstanceKlass* 5228 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5229 5230 // note that is not safe to use the fields in the parser from this point on 5231 assert(NULL == _cp, "invariant"); 5232 assert(NULL == _fields, "invariant"); 5233 assert(NULL == _methods, "invariant"); 5234 assert(NULL == _inner_classes, "invariant"); 5235 assert(NULL == _local_interfaces, "invariant"); 5236 assert(NULL == _transitive_interfaces, "invariant"); 5237 assert(NULL == _combined_annotations, "invariant"); 5238 5239 if (_has_final_method) { 5240 ik->set_has_final_method(); 5241 } 5242 5243 ik->copy_method_ordering(_method_ordering, CHECK); 5244 // The InstanceKlass::_methods_jmethod_ids cache 5245 // is managed on the assumption that the initial cache 5246 // size is equal to the number of methods in the class. If 5247 // that changes, then InstanceKlass::idnum_can_increment() 5248 // has to be changed accordingly. 5249 ik->set_initial_method_idnum(ik->methods()->length()); 5250 5251 ik->set_name(_class_name); 5252 5253 if (is_anonymous()) { 5254 // I am well known to myself 5255 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve 5256 } 5257 5258 ik->set_minor_version(_minor_version); 5259 ik->set_major_version(_major_version); 5260 ik->set_has_default_methods(_has_default_methods); 5261 ik->set_declares_default_methods(_declares_default_methods); 5262 5263 if (_host_klass != NULL) { 5264 assert (ik->is_anonymous(), "should be the same"); 5265 ik->set_host_klass(_host_klass); 5266 } 5267 5268 const Array<Method*>* const methods = ik->methods(); 5269 assert(methods != NULL, "invariant"); 5270 const int methods_len = methods->length(); 5271 5272 check_methods_for_intrinsics(ik, methods); 5273 5274 // Fill in field values obtained by parse_classfile_attributes 5275 if (_parsed_annotations->has_any_annotations()) { 5276 _parsed_annotations->apply_to(ik); 5277 } 5278 5279 apply_parsed_class_attributes(ik); 5280 5281 // Miranda methods 5282 if ((_num_miranda_methods > 0) || 5283 // if this class introduced new miranda methods or 5284 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5285 // super class exists and this class inherited miranda methods 5286 ) { 5287 ik->set_has_miranda_methods(); // then set a flag 5288 } 5289 5290 // Fill in information needed to compute superclasses. 5291 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5292 5293 // Initialize itable offset tables 5294 klassItable::setup_itable_offset_table(ik); 5295 5296 // Compute transitive closure of interfaces this class implements 5297 // Do final class setup 5298 fill_oop_maps(ik, 5299 _field_info->nonstatic_oop_map_count, 5300 _field_info->nonstatic_oop_offsets, 5301 _field_info->nonstatic_oop_counts); 5302 5303 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5304 set_precomputed_flags(ik); 5305 5306 // check if this class can access its super class 5307 check_super_class_access(ik, CHECK); 5308 5309 // check if this class can access its superinterfaces 5310 check_super_interface_access(ik, CHECK); 5311 5312 // check if this class overrides any final method 5313 check_final_method_override(ik, CHECK); 5314 5315 // check that if this class is an interface then it doesn't have static methods 5316 if (ik->is_interface()) { 5317 /* An interface in a JAVA 8 classfile can be static */ 5318 if (_major_version < JAVA_8_VERSION) { 5319 check_illegal_static_method(ik, CHECK); 5320 } 5321 } 5322 5323 // Allocate mirror and initialize static fields 5324 // The create_mirror() call will also call compute_modifiers() 5325 java_lang_Class::create_mirror(ik, 5326 _loader_data->class_loader(), 5327 _protection_domain, 5328 CHECK); 5329 5330 assert(_all_mirandas != NULL, "invariant"); 5331 5332 // Generate any default methods - default methods are interface methods 5333 // that have a default implementation. This is new with Lambda project. 5334 if (_has_default_methods ) { 5335 DefaultMethods::generate_default_methods(ik, 5336 _all_mirandas, 5337 CHECK); 5338 } 5339 5340 // Update the loader_data graph. 5341 record_defined_class_dependencies(ik, CHECK); 5342 5343 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5344 5345 if (!is_internal()) { 5346 if (TraceClassLoading) { 5347 ResourceMark rm; 5348 // print in a single call to reduce interleaving of output 5349 if (_stream->source() != NULL) { 5350 tty->print("[Loaded %s from %s]\n", 5351 ik->external_name(), 5352 _stream->source()); 5353 } else if (_loader_data->class_loader() == NULL) { 5354 const Klass* const caller = 5355 THREAD->is_Java_thread() 5356 ? ((JavaThread*)THREAD)->security_get_caller_class(1) 5357 : NULL; 5358 // caller can be NULL, for example, during a JVMTI VM_Init hook 5359 if (caller != NULL) { 5360 tty->print("[Loaded %s by instance of %s]\n", 5361 ik->external_name(), 5362 caller->external_name()); 5363 } else { 5364 tty->print("[Loaded %s]\n", ik->external_name()); 5365 } 5366 } else { 5367 tty->print("[Loaded %s from %s]\n", ik->external_name(), 5368 _loader_data->class_loader()->klass()->external_name()); 5369 } 5370 } 5371 5372 if (TraceClassResolution) { 5373 ResourceMark rm; 5374 // print out the superclass. 5375 const char * from = ik->external_name(); 5376 if (ik->java_super() != NULL) { 5377 tty->print("RESOLVE %s %s (super)\n", 5378 from, 5379 ik->java_super()->external_name()); 5380 } 5381 // print out each of the interface classes referred to by this class. 5382 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5383 if (local_interfaces != NULL) { 5384 const int length = local_interfaces->length(); 5385 for (int i = 0; i < length; i++) { 5386 const Klass* const k = local_interfaces->at(i); 5387 const char * to = k->external_name(); 5388 tty->print("RESOLVE %s %s (interface)\n", from, to); 5389 } 5390 } 5391 } 5392 } 5393 5394 TRACE_INIT_ID(ik); 5395 5396 // If we reach here, all is well. 5397 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5398 // in order for it to not be destroyed in the ClassFileParser destructor. 5399 set_klass_to_deallocate(NULL); 5400 5401 // it's official 5402 set_klass(ik); 5403 5404 debug_only(ik->verify();) 5405} 5406 5407ClassFileParser::ClassFileParser(ClassFileStream* stream, 5408 Symbol* name, 5409 ClassLoaderData* loader_data, 5410 Handle protection_domain, 5411 TempNewSymbol* parsed_name, 5412 const Klass* host_klass, 5413 GrowableArray<Handle>* cp_patches, 5414 Publicity pub_level, 5415 TRAPS) : 5416 _stream(stream), 5417 _requested_name(name), 5418 _loader_data(loader_data), 5419 _host_klass(host_klass), 5420 _cp_patches(cp_patches), 5421 _parsed_name(parsed_name), 5422 _super_klass(), 5423 _cp(NULL), 5424 _fields(NULL), 5425 _methods(NULL), 5426 _inner_classes(NULL), 5427 _local_interfaces(NULL), 5428 _transitive_interfaces(NULL), 5429 _combined_annotations(NULL), 5430 _annotations(NULL), 5431 _type_annotations(NULL), 5432 _fields_annotations(NULL), 5433 _fields_type_annotations(NULL), 5434 _klass(NULL), 5435 _klass_to_deallocate(NULL), 5436 _parsed_annotations(NULL), 5437 _fac(NULL), 5438 _field_info(NULL), 5439 _method_ordering(NULL), 5440 _all_mirandas(NULL), 5441 _vtable_size(0), 5442 _itable_size(0), 5443 _num_miranda_methods(0), 5444 _rt(REF_NONE), 5445 _protection_domain(protection_domain), 5446 _access_flags(), 5447 _pub_level(pub_level), 5448 _synthetic_flag(false), 5449 _sde_length(false), 5450 _sde_buffer(NULL), 5451 _sourcefile_index(0), 5452 _generic_signature_index(0), 5453 _major_version(0), 5454 _minor_version(0), 5455 _this_class_index(0), 5456 _super_class_index(0), 5457 _itfs_len(0), 5458 _java_fields_count(0), 5459 _need_verify(false), 5460 _relax_verify(false), 5461 _has_default_methods(false), 5462 _declares_default_methods(false), 5463 _has_final_method(false), 5464 _has_finalizer(false), 5465 _has_empty_finalizer(false), 5466 _has_vanilla_constructor(false), 5467 _max_bootstrap_specifier_index(-1) { 5468 5469 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5470 5471 assert(THREAD->is_Java_thread(), "invariant"); 5472 assert(_loader_data != NULL, "invariant"); 5473 assert(stream != NULL, "invariant"); 5474 assert(_stream != NULL, "invariant"); 5475 assert(_stream->buffer() == _stream->current(), "invariant"); 5476 assert(_class_name != NULL, "invariant"); 5477 assert(0 == _access_flags.as_int(), "invariant"); 5478 5479 // Figure out whether we can skip format checking (matching classic VM behavior) 5480 if (DumpSharedSpaces) { 5481 // verify == true means it's a 'remote' class (i.e., non-boot class) 5482 // Verification decision is based on BytecodeVerificationRemote flag 5483 // for those classes. 5484 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5485 BytecodeVerificationLocal; 5486 } 5487 else { 5488 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5489 stream->need_verify()); 5490 } 5491 5492 // synch back verification state to stream 5493 stream->set_verify(_need_verify); 5494 5495 // Check if verification needs to be relaxed for this class file 5496 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5497 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader()); 5498 5499 parse_stream(stream, CHECK); 5500 5501 post_process_parsed_stream(stream, _cp, CHECK); 5502} 5503 5504void ClassFileParser::clear_class_metadata() { 5505 // metadata created before the instance klass is created. Must be 5506 // deallocated if classfile parsing returns an error. 5507 _cp = NULL; 5508 _fields = NULL; 5509 _methods = NULL; 5510 _inner_classes = NULL; 5511 _local_interfaces = NULL; 5512 _transitive_interfaces = NULL; 5513 _combined_annotations = NULL; 5514 _annotations = _type_annotations = NULL; 5515 _fields_annotations = _fields_type_annotations = NULL; 5516} 5517 5518// Destructor to clean up 5519ClassFileParser::~ClassFileParser() { 5520 if (_cp != NULL) { 5521 MetadataFactory::free_metadata(_loader_data, _cp); 5522 } 5523 if (_fields != NULL) { 5524 MetadataFactory::free_array<u2>(_loader_data, _fields); 5525 } 5526 5527 if (_methods != NULL) { 5528 // Free methods 5529 InstanceKlass::deallocate_methods(_loader_data, _methods); 5530 } 5531 5532 // beware of the Universe::empty_blah_array!! 5533 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5534 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5535 } 5536 5537 // Free interfaces 5538 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5539 _local_interfaces, _transitive_interfaces); 5540 5541 if (_combined_annotations != NULL) { 5542 // After all annotations arrays have been created, they are installed into the 5543 // Annotations object that will be assigned to the InstanceKlass being created. 5544 5545 // Deallocate the Annotations object and the installed annotations arrays. 5546 _combined_annotations->deallocate_contents(_loader_data); 5547 5548 // If the _combined_annotations pointer is non-NULL, 5549 // then the other annotations fields should have been cleared. 5550 assert(_annotations == NULL, "Should have been cleared"); 5551 assert(_type_annotations == NULL, "Should have been cleared"); 5552 assert(_fields_annotations == NULL, "Should have been cleared"); 5553 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5554 } else { 5555 // If the annotations arrays were not installed into the Annotations object, 5556 // then they have to be deallocated explicitly. 5557 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5558 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5559 Annotations::free_contents(_loader_data, _fields_annotations); 5560 Annotations::free_contents(_loader_data, _fields_type_annotations); 5561 } 5562 5563 clear_class_metadata(); 5564 5565 // deallocate the klass if already created. Don't directly deallocate, but add 5566 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5567 // at a safepoint. 5568 if (_klass_to_deallocate != NULL) { 5569 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5570 } 5571} 5572 5573void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5574 TRAPS) { 5575 5576 assert(stream != NULL, "invariant"); 5577 assert(_class_name != NULL, "invariant"); 5578 5579 // BEGIN STREAM PARSING 5580 stream->guarantee_more(8, CHECK); // magic, major, minor 5581 // Magic value 5582 const u4 magic = stream->get_u4_fast(); 5583 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5584 "Incompatible magic value %u in class file %s", 5585 magic, CHECK); 5586 5587 // Version numbers 5588 _minor_version = stream->get_u2_fast(); 5589 _major_version = stream->get_u2_fast(); 5590 5591 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5592 ResourceMark rm; 5593 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5594 _major_version, _minor_version, _class_name->as_C_string()); 5595 Exceptions::fthrow( 5596 THREAD_AND_LOCATION, 5597 vmSymbols::java_lang_UnsupportedClassVersionError(), 5598 "Unsupported major.minor version for dump time %u.%u", 5599 _major_version, 5600 _minor_version); 5601 } 5602 5603 // Check version numbers - we check this even with verifier off 5604 if (!is_supported_version(_major_version, _minor_version)) { 5605 ResourceMark rm(THREAD); 5606 Exceptions::fthrow( 5607 THREAD_AND_LOCATION, 5608 vmSymbols::java_lang_UnsupportedClassVersionError(), 5609 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5610 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5611 _class_name->as_C_string(), 5612 _major_version, 5613 _minor_version, 5614 JAVA_MAX_SUPPORTED_VERSION, 5615 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5616 return; 5617 } 5618 5619 stream->guarantee_more(3, CHECK); // length, first cp tag 5620 const u2 cp_size = stream->get_u2_fast(); 5621 5622 guarantee_property( 5623 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5624 cp_size, CHECK); 5625 5626 _cp = ConstantPool::allocate(_loader_data, 5627 cp_size, 5628 CHECK); 5629 5630 ConstantPool* const cp = _cp; 5631 5632 parse_constant_pool(stream, cp, cp_size, CHECK); 5633 5634 assert(cp_size == (const u2)cp->length(), "invariant"); 5635 5636 // ACCESS FLAGS 5637 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5638 5639 // Access flags 5640 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5641 5642 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5643 // Set abstract bit for old class files for backward compatibility 5644 flags |= JVM_ACC_ABSTRACT; 5645 } 5646 5647 _access_flags.set_flags(flags); 5648 5649 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK); 5650 5651 // This class and superclass 5652 _this_class_index = stream->get_u2_fast(); 5653 check_property( 5654 valid_cp_range(_this_class_index, cp_size) && 5655 cp->tag_at(_this_class_index).is_unresolved_klass(), 5656 "Invalid this class index %u in constant pool in class file %s", 5657 _this_class_index, CHECK); 5658 5659 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5660 assert(class_name_in_cp != NULL, "class_name can't be null"); 5661 5662 if (_parsed_name != NULL) { 5663 // It's important to set parsed_name *before* resolving the super class. 5664 // (it's used for cleanup by the caller if parsing fails) 5665 *_parsed_name = class_name_in_cp; 5666 // parsed_name is returned and can be used if there's an error, so add to 5667 // its reference count. Caller will decrement the refcount. 5668 (*_parsed_name)->increment_refcount(); 5669 } 5670 5671 // Update _class_name which could be null previously 5672 // to reflect the name in the constant pool 5673 _class_name = class_name_in_cp; 5674 5675 // Don't need to check whether this class name is legal or not. 5676 // It has been checked when constant pool is parsed. 5677 // However, make sure it is not an array type. 5678 if (_need_verify) { 5679 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5680 "Bad class name in class file %s", 5681 CHECK); 5682 } 5683 5684 // Checks if name in class file matches requested name 5685 if (_requested_name != NULL && _requested_name != _class_name) { 5686 ResourceMark rm(THREAD); 5687 Exceptions::fthrow( 5688 THREAD_AND_LOCATION, 5689 vmSymbols::java_lang_NoClassDefFoundError(), 5690 "%s (wrong name: %s)", 5691 _class_name->as_C_string(), 5692 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5693 ); 5694 return; 5695 } 5696 5697 if (!is_internal()) { 5698 if (TraceClassLoadingPreorder) { 5699 tty->print("[Loading %s", 5700 _class_name->as_klass_external_name()); 5701 5702 if (stream->source() != NULL) { 5703 tty->print(" from %s", stream->source()); 5704 } 5705 tty->print_cr("]"); 5706 } 5707#if INCLUDE_CDS 5708 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5709 // Only dump the classes that can be stored into CDS archive 5710 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) { 5711 ResourceMark rm(THREAD); 5712 classlist_file->print_cr("%s", _class_name->as_C_string()); 5713 classlist_file->flush(); 5714 } 5715 } 5716#endif 5717 } 5718 5719 // SUPERKLASS 5720 _super_class_index = stream->get_u2_fast(); 5721 _super_klass = parse_super_class(cp, 5722 _super_class_index, 5723 _need_verify, 5724 CHECK); 5725 5726 // Interfaces 5727 _itfs_len = stream->get_u2_fast(); 5728 parse_interfaces(stream, 5729 _itfs_len, 5730 cp, 5731 &_has_default_methods, 5732 CHECK); 5733 5734 assert(_local_interfaces != NULL, "invariant"); 5735 5736 // Fields (offsets are filled in later) 5737 _fac = new FieldAllocationCount(); 5738 parse_fields(stream, 5739 _access_flags.is_interface(), 5740 _fac, 5741 cp, 5742 cp_size, 5743 &_java_fields_count, 5744 CHECK); 5745 5746 assert(_fields != NULL, "invariant"); 5747 5748 // Methods 5749 AccessFlags promoted_flags; 5750 parse_methods(stream, 5751 _access_flags.is_interface(), 5752 &promoted_flags, 5753 &_has_final_method, 5754 &_declares_default_methods, 5755 CHECK); 5756 5757 assert(_methods != NULL, "invariant"); 5758 5759 // promote flags from parse_methods() to the klass' flags 5760 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5761 5762 if (_declares_default_methods) { 5763 _has_default_methods = true; 5764 } 5765 5766 // Additional attributes/annotations 5767 _parsed_annotations = new ClassAnnotationCollector(); 5768 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 5769 5770 assert(_inner_classes != NULL, "invariant"); 5771 5772 // Finalize the Annotations metadata object, 5773 // now that all annotation arrays have been created. 5774 create_combined_annotations(CHECK); 5775 5776 // Make sure this is the end of class file stream 5777 guarantee_property(stream->at_eos(), 5778 "Extra bytes at the end of class file %s", 5779 CHECK); 5780 5781 // all bytes in stream read and parsed 5782} 5783 5784void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 5785 ConstantPool* cp, 5786 TRAPS) { 5787 assert(stream != NULL, "invariant"); 5788 assert(stream->at_eos(), "invariant"); 5789 assert(cp != NULL, "invariant"); 5790 assert(_loader_data != NULL, "invariant"); 5791 5792 // We check super class after class file is parsed and format is checked 5793 if (_super_class_index > 0 && NULL ==_super_klass) { 5794 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 5795 if (_access_flags.is_interface()) { 5796 // Before attempting to resolve the superclass, check for class format 5797 // errors not checked yet. 5798 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 5799 "Interfaces must have java.lang.Object as superclass in class file %s", 5800 CHECK); 5801 } 5802 _super_klass = (const InstanceKlass*) 5803 SystemDictionary::resolve_super_or_fail(_class_name, 5804 super_class_name, 5805 _loader_data->class_loader(), 5806 _protection_domain, 5807 true, 5808 CHECK); 5809 } 5810 5811 if (_super_klass != NULL) { 5812 if (_super_klass->has_default_methods()) { 5813 _has_default_methods = true; 5814 } 5815 5816 if (_super_klass->is_interface()) { 5817 ResourceMark rm(THREAD); 5818 Exceptions::fthrow( 5819 THREAD_AND_LOCATION, 5820 vmSymbols::java_lang_IncompatibleClassChangeError(), 5821 "class %s has interface %s as super class", 5822 _class_name->as_klass_external_name(), 5823 _super_klass->external_name() 5824 ); 5825 return; 5826 } 5827 // Make sure super class is not final 5828 if (_super_klass->is_final()) { 5829 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 5830 } 5831 } 5832 5833 // Compute the transitive list of all unique interfaces implemented by this class 5834 _transitive_interfaces = 5835 compute_transitive_interfaces(_super_klass, 5836 _local_interfaces, 5837 _loader_data, 5838 CHECK); 5839 5840 assert(_transitive_interfaces != NULL, "invariant"); 5841 5842 // sort methods 5843 _method_ordering = sort_methods(_methods); 5844 5845 _all_mirandas = new GrowableArray<Method*>(20); 5846 5847 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 5848 &_num_miranda_methods, 5849 _all_mirandas, 5850 _super_klass, 5851 _methods, 5852 _access_flags, 5853 _loader_data->class_loader(), 5854 _class_name, 5855 _local_interfaces, 5856 CHECK); 5857 5858 // Size of Java itable (in words) 5859 _itable_size = _access_flags.is_interface() ? 0 : 5860 klassItable::compute_itable_size(_transitive_interfaces); 5861 5862 assert(_fac != NULL, "invariant"); 5863 assert(_parsed_annotations != NULL, "invariant"); 5864 5865 _field_info = new FieldLayoutInfo(); 5866 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 5867 5868 // Compute reference typ 5869 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 5870 5871} 5872 5873void ClassFileParser::set_klass(InstanceKlass* klass) { 5874 5875#ifdef ASSERT 5876 if (klass != NULL) { 5877 assert(NULL == _klass, "leaking?"); 5878 } 5879#endif 5880 5881 _klass = klass; 5882} 5883 5884void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 5885 5886#ifdef ASSERT 5887 if (klass != NULL) { 5888 assert(NULL == _klass_to_deallocate, "leaking?"); 5889 } 5890#endif 5891 5892 _klass_to_deallocate = klass; 5893} 5894 5895// Caller responsible for ResourceMark 5896// clone stream with rewound position 5897const ClassFileStream* ClassFileParser::clone_stream() const { 5898 assert(_stream != NULL, "invariant"); 5899 5900 return _stream->clone(); 5901} 5902