1/* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24#include "precompiled.hpp" 25#include "aot/aotLoader.hpp" 26#include "classfile/classFileParser.hpp" 27#include "classfile/classFileStream.hpp" 28#include "classfile/classLoader.hpp" 29#include "classfile/classLoaderData.inline.hpp" 30#include "classfile/defaultMethods.hpp" 31#include "classfile/dictionary.hpp" 32#include "classfile/javaClasses.inline.hpp" 33#include "classfile/moduleEntry.hpp" 34#include "classfile/symbolTable.hpp" 35#include "classfile/systemDictionary.hpp" 36#include "classfile/verificationType.hpp" 37#include "classfile/verifier.hpp" 38#include "classfile/vmSymbols.hpp" 39#include "gc/shared/gcLocker.hpp" 40#include "logging/log.hpp" 41#include "logging/logStream.hpp" 42#include "memory/allocation.hpp" 43#include "memory/metadataFactory.hpp" 44#include "memory/oopFactory.hpp" 45#include "memory/resourceArea.hpp" 46#include "memory/universe.inline.hpp" 47#include "oops/annotations.hpp" 48#include "oops/fieldStreams.hpp" 49#include "oops/instanceKlass.hpp" 50#include "oops/instanceMirrorKlass.hpp" 51#include "oops/klass.inline.hpp" 52#include "oops/klassVtable.hpp" 53#include "oops/metadata.hpp" 54#include "oops/method.hpp" 55#include "oops/oop.inline.hpp" 56#include "oops/symbol.hpp" 57#include "prims/jvm.h" 58#include "prims/jvmtiExport.hpp" 59#include "prims/jvmtiThreadState.hpp" 60#include "runtime/javaCalls.hpp" 61#include "runtime/perfData.hpp" 62#include "runtime/reflection.hpp" 63#include "runtime/signature.hpp" 64#include "runtime/timer.hpp" 65#include "services/classLoadingService.hpp" 66#include "services/threadService.hpp" 67#include "trace/traceMacros.hpp" 68#include "utilities/align.hpp" 69#include "utilities/bitMap.inline.hpp" 70#include "utilities/exceptions.hpp" 71#include "utilities/globalDefinitions.hpp" 72#include "utilities/growableArray.hpp" 73#include "utilities/macros.hpp" 74#include "utilities/ostream.hpp" 75#include "utilities/resourceHash.hpp" 76#if INCLUDE_CDS 77#include "classfile/systemDictionaryShared.hpp" 78#endif 79 80// We generally try to create the oops directly when parsing, rather than 81// allocating temporary data structures and copying the bytes twice. A 82// temporary area is only needed when parsing utf8 entries in the constant 83// pool and when parsing line number tables. 84 85// We add assert in debug mode when class format is not checked. 86 87#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 88#define JAVA_MIN_SUPPORTED_VERSION 45 89#define JAVA_MAX_SUPPORTED_VERSION 53 90#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 91 92// Used for two backward compatibility reasons: 93// - to check for new additions to the class file format in JDK1.5 94// - to check for bug fixes in the format checker in JDK1.5 95#define JAVA_1_5_VERSION 49 96 97// Used for backward compatibility reasons: 98// - to check for javac bug fixes that happened after 1.5 99// - also used as the max version when running in jdk6 100#define JAVA_6_VERSION 50 101 102// Used for backward compatibility reasons: 103// - to disallow argument and require ACC_STATIC for <clinit> methods 104#define JAVA_7_VERSION 51 105 106// Extension method support. 107#define JAVA_8_VERSION 52 108 109#define JAVA_9_VERSION 53 110 111void ClassFileParser::set_class_bad_constant_seen(short bad_constant) { 112 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION, 113 "Unexpected bad constant pool entry"); 114 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant; 115} 116 117void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 118 ConstantPool* cp, 119 const int length, 120 TRAPS) { 121 assert(stream != NULL, "invariant"); 122 assert(cp != NULL, "invariant"); 123 124 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 125 // this function (_current can be allocated in a register, with scalar 126 // replacement of aggregates). The _current pointer is copied back to 127 // stream() when this function returns. DON'T call another method within 128 // this method that uses stream(). 129 const ClassFileStream cfs1 = *stream; 130 const ClassFileStream* const cfs = &cfs1; 131 132 assert(cfs->allocated_on_stack(), "should be local"); 133 debug_only(const u1* const old_current = stream->current();) 134 135 // Used for batching symbol allocations. 136 const char* names[SymbolTable::symbol_alloc_batch_size]; 137 int lengths[SymbolTable::symbol_alloc_batch_size]; 138 int indices[SymbolTable::symbol_alloc_batch_size]; 139 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 140 int names_count = 0; 141 142 // parsing Index 0 is unused 143 for (int index = 1; index < length; index++) { 144 // Each of the following case guarantees one more byte in the stream 145 // for the following tag or the access_flags following constant pool, 146 // so we don't need bounds-check for reading tag. 147 const u1 tag = cfs->get_u1_fast(); 148 switch (tag) { 149 case JVM_CONSTANT_Class : { 150 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 151 const u2 name_index = cfs->get_u2_fast(); 152 cp->klass_index_at_put(index, name_index); 153 break; 154 } 155 case JVM_CONSTANT_Fieldref: { 156 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 157 const u2 class_index = cfs->get_u2_fast(); 158 const u2 name_and_type_index = cfs->get_u2_fast(); 159 cp->field_at_put(index, class_index, name_and_type_index); 160 break; 161 } 162 case JVM_CONSTANT_Methodref: { 163 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 164 const u2 class_index = cfs->get_u2_fast(); 165 const u2 name_and_type_index = cfs->get_u2_fast(); 166 cp->method_at_put(index, class_index, name_and_type_index); 167 break; 168 } 169 case JVM_CONSTANT_InterfaceMethodref: { 170 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 171 const u2 class_index = cfs->get_u2_fast(); 172 const u2 name_and_type_index = cfs->get_u2_fast(); 173 cp->interface_method_at_put(index, class_index, name_and_type_index); 174 break; 175 } 176 case JVM_CONSTANT_String : { 177 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 178 const u2 string_index = cfs->get_u2_fast(); 179 cp->string_index_at_put(index, string_index); 180 break; 181 } 182 case JVM_CONSTANT_MethodHandle : 183 case JVM_CONSTANT_MethodType: { 184 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 185 classfile_parse_error( 186 "Class file version does not support constant tag %u in class file %s", 187 tag, CHECK); 188 } 189 if (tag == JVM_CONSTANT_MethodHandle) { 190 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 191 const u1 ref_kind = cfs->get_u1_fast(); 192 const u2 method_index = cfs->get_u2_fast(); 193 cp->method_handle_index_at_put(index, ref_kind, method_index); 194 } 195 else if (tag == JVM_CONSTANT_MethodType) { 196 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 197 const u2 signature_index = cfs->get_u2_fast(); 198 cp->method_type_index_at_put(index, signature_index); 199 } 200 else { 201 ShouldNotReachHere(); 202 } 203 break; 204 } 205 case JVM_CONSTANT_InvokeDynamic : { 206 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 207 classfile_parse_error( 208 "Class file version does not support constant tag %u in class file %s", 209 tag, CHECK); 210 } 211 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 212 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 213 const u2 name_and_type_index = cfs->get_u2_fast(); 214 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 215 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 216 } 217 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 218 break; 219 } 220 case JVM_CONSTANT_Integer: { 221 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 222 const u4 bytes = cfs->get_u4_fast(); 223 cp->int_at_put(index, (jint)bytes); 224 break; 225 } 226 case JVM_CONSTANT_Float: { 227 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 228 const u4 bytes = cfs->get_u4_fast(); 229 cp->float_at_put(index, *(jfloat*)&bytes); 230 break; 231 } 232 case JVM_CONSTANT_Long: { 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->long_at_put(index, bytes); 241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 242 break; 243 } 244 case JVM_CONSTANT_Double: { 245 // A mangled type might cause you to overrun allocated memory 246 guarantee_property(index+1 < length, 247 "Invalid constant pool entry %u in class file %s", 248 index, 249 CHECK); 250 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 251 const u8 bytes = cfs->get_u8_fast(); 252 cp->double_at_put(index, *(jdouble*)&bytes); 253 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 254 break; 255 } 256 case JVM_CONSTANT_NameAndType: { 257 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 258 const u2 name_index = cfs->get_u2_fast(); 259 const u2 signature_index = cfs->get_u2_fast(); 260 cp->name_and_type_at_put(index, name_index, signature_index); 261 break; 262 } 263 case JVM_CONSTANT_Utf8 : { 264 cfs->guarantee_more(2, CHECK); // utf8_length 265 u2 utf8_length = cfs->get_u2_fast(); 266 const u1* utf8_buffer = cfs->current(); 267 assert(utf8_buffer != NULL, "null utf8 buffer"); 268 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 269 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 270 cfs->skip_u1_fast(utf8_length); 271 272 // Before storing the symbol, make sure it's legal 273 if (_need_verify) { 274 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 275 } 276 277 if (has_cp_patch_at(index)) { 278 Handle patch = clear_cp_patch_at(index); 279 guarantee_property(java_lang_String::is_instance(patch()), 280 "Illegal utf8 patch at %d in class file %s", 281 index, 282 CHECK); 283 const char* const str = java_lang_String::as_utf8_string(patch()); 284 // (could use java_lang_String::as_symbol instead, but might as well batch them) 285 utf8_buffer = (const u1*) str; 286 utf8_length = (int) strlen(str); 287 } 288 289 unsigned int hash; 290 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 291 utf8_length, 292 hash); 293 if (result == NULL) { 294 names[names_count] = (const char*)utf8_buffer; 295 lengths[names_count] = utf8_length; 296 indices[names_count] = index; 297 hashValues[names_count++] = hash; 298 if (names_count == SymbolTable::symbol_alloc_batch_size) { 299 SymbolTable::new_symbols(_loader_data, 300 cp, 301 names_count, 302 names, 303 lengths, 304 indices, 305 hashValues, 306 CHECK); 307 names_count = 0; 308 } 309 } else { 310 cp->symbol_at_put(index, result); 311 } 312 break; 313 } 314 case 19: 315 case 20: { 316 // Record that an error occurred in these two cases but keep parsing so 317 // that ACC_Module can be checked for in the access_flags. Need to 318 // throw NoClassDefFoundError in that case. 319 if (_major_version >= JAVA_9_VERSION) { 320 cfs->guarantee_more(3, CHECK); 321 cfs->get_u2_fast(); 322 set_class_bad_constant_seen(tag); 323 break; 324 } 325 } 326 default: { 327 classfile_parse_error("Unknown constant tag %u in class file %s", 328 tag, 329 CHECK); 330 break; 331 } 332 } // end of switch(tag) 333 } // end of for 334 335 // Allocate the remaining symbols 336 if (names_count > 0) { 337 SymbolTable::new_symbols(_loader_data, 338 cp, 339 names_count, 340 names, 341 lengths, 342 indices, 343 hashValues, 344 CHECK); 345 } 346 347 // Copy _current pointer of local copy back to stream. 348 assert(stream->current() == old_current, "non-exclusive use of stream"); 349 stream->set_current(cfs1.current()); 350 351} 352 353static inline bool valid_cp_range(int index, int length) { 354 return (index > 0 && index < length); 355} 356 357static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 358 assert(cp != NULL, "invariant"); 359 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 360 return cp->symbol_at(index); 361 } 362 return NULL; 363} 364 365#ifdef ASSERT 366PRAGMA_DIAG_PUSH 367PRAGMA_FORMAT_NONLITERAL_IGNORED 368void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 369 ResourceMark rm(THREAD); 370 fatal(msg, _class_name->as_C_string()); 371} 372 373void ClassFileParser::report_assert_property_failure(const char* msg, 374 int index, 375 TRAPS) const { 376 ResourceMark rm(THREAD); 377 fatal(msg, index, _class_name->as_C_string()); 378} 379PRAGMA_DIAG_POP 380#endif 381 382void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 383 ConstantPool* const cp, 384 const int length, 385 TRAPS) { 386 assert(cp != NULL, "invariant"); 387 assert(stream != NULL, "invariant"); 388 389 // parsing constant pool entries 390 parse_constant_pool_entries(stream, cp, length, CHECK); 391 if (class_bad_constant_seen() != 0) { 392 // a bad CP entry has been detected previously so stop parsing and just return. 393 return; 394 } 395 396 int index = 1; // declared outside of loops for portability 397 int num_klasses = 0; 398 399 // first verification pass - validate cross references 400 // and fixup class and string constants 401 for (index = 1; index < length; index++) { // Index 0 is unused 402 const jbyte tag = cp->tag_at(index).value(); 403 switch (tag) { 404 case JVM_CONSTANT_Class: { 405 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 406 break; 407 } 408 case JVM_CONSTANT_Fieldref: 409 // fall through 410 case JVM_CONSTANT_Methodref: 411 // fall through 412 case JVM_CONSTANT_InterfaceMethodref: { 413 if (!_need_verify) break; 414 const int klass_ref_index = cp->klass_ref_index_at(index); 415 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 416 check_property(valid_klass_reference_at(klass_ref_index), 417 "Invalid constant pool index %u in class file %s", 418 klass_ref_index, CHECK); 419 check_property(valid_cp_range(name_and_type_ref_index, length) && 420 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 421 "Invalid constant pool index %u in class file %s", 422 name_and_type_ref_index, CHECK); 423 break; 424 } 425 case JVM_CONSTANT_String: { 426 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 427 break; 428 } 429 case JVM_CONSTANT_Integer: 430 break; 431 case JVM_CONSTANT_Float: 432 break; 433 case JVM_CONSTANT_Long: 434 case JVM_CONSTANT_Double: { 435 index++; 436 check_property( 437 (index < length && cp->tag_at(index).is_invalid()), 438 "Improper constant pool long/double index %u in class file %s", 439 index, CHECK); 440 break; 441 } 442 case JVM_CONSTANT_NameAndType: { 443 if (!_need_verify) break; 444 const int name_ref_index = cp->name_ref_index_at(index); 445 const int signature_ref_index = cp->signature_ref_index_at(index); 446 check_property(valid_symbol_at(name_ref_index), 447 "Invalid constant pool index %u in class file %s", 448 name_ref_index, CHECK); 449 check_property(valid_symbol_at(signature_ref_index), 450 "Invalid constant pool index %u in class file %s", 451 signature_ref_index, CHECK); 452 break; 453 } 454 case JVM_CONSTANT_Utf8: 455 break; 456 case JVM_CONSTANT_UnresolvedClass: // fall-through 457 case JVM_CONSTANT_UnresolvedClassInError: { 458 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 459 break; 460 } 461 case JVM_CONSTANT_ClassIndex: { 462 const int class_index = cp->klass_index_at(index); 463 check_property(valid_symbol_at(class_index), 464 "Invalid constant pool index %u in class file %s", 465 class_index, CHECK); 466 cp->unresolved_klass_at_put(index, class_index, num_klasses++); 467 break; 468 } 469 case JVM_CONSTANT_StringIndex: { 470 const int string_index = cp->string_index_at(index); 471 check_property(valid_symbol_at(string_index), 472 "Invalid constant pool index %u in class file %s", 473 string_index, CHECK); 474 Symbol* const sym = cp->symbol_at(string_index); 475 cp->unresolved_string_at_put(index, sym); 476 break; 477 } 478 case JVM_CONSTANT_MethodHandle: { 479 const int ref_index = cp->method_handle_index_at(index); 480 check_property(valid_cp_range(ref_index, length), 481 "Invalid constant pool index %u in class file %s", 482 ref_index, CHECK); 483 const constantTag tag = cp->tag_at(ref_index); 484 const int ref_kind = cp->method_handle_ref_kind_at(index); 485 486 switch (ref_kind) { 487 case JVM_REF_getField: 488 case JVM_REF_getStatic: 489 case JVM_REF_putField: 490 case JVM_REF_putStatic: { 491 check_property( 492 tag.is_field(), 493 "Invalid constant pool index %u in class file %s (not a field)", 494 ref_index, CHECK); 495 break; 496 } 497 case JVM_REF_invokeVirtual: 498 case JVM_REF_newInvokeSpecial: { 499 check_property( 500 tag.is_method(), 501 "Invalid constant pool index %u in class file %s (not a method)", 502 ref_index, CHECK); 503 break; 504 } 505 case JVM_REF_invokeStatic: 506 case JVM_REF_invokeSpecial: { 507 check_property( 508 tag.is_method() || 509 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 510 "Invalid constant pool index %u in class file %s (not a method)", 511 ref_index, CHECK); 512 break; 513 } 514 case JVM_REF_invokeInterface: { 515 check_property( 516 tag.is_interface_method(), 517 "Invalid constant pool index %u in class file %s (not an interface method)", 518 ref_index, CHECK); 519 break; 520 } 521 default: { 522 classfile_parse_error( 523 "Bad method handle kind at constant pool index %u in class file %s", 524 index, CHECK); 525 } 526 } // switch(refkind) 527 // Keep the ref_index unchanged. It will be indirected at link-time. 528 break; 529 } // case MethodHandle 530 case JVM_CONSTANT_MethodType: { 531 const int ref_index = cp->method_type_index_at(index); 532 check_property(valid_symbol_at(ref_index), 533 "Invalid constant pool index %u in class file %s", 534 ref_index, CHECK); 535 break; 536 } 537 case JVM_CONSTANT_InvokeDynamic: { 538 const int name_and_type_ref_index = 539 cp->invoke_dynamic_name_and_type_ref_index_at(index); 540 541 check_property(valid_cp_range(name_and_type_ref_index, length) && 542 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 543 "Invalid constant pool index %u in class file %s", 544 name_and_type_ref_index, CHECK); 545 // bootstrap specifier index must be checked later, 546 // when BootstrapMethods attr is available 547 break; 548 } 549 default: { 550 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 551 ShouldNotReachHere(); 552 break; 553 } 554 } // switch(tag) 555 } // end of for 556 557 _first_patched_klass_resolved_index = num_klasses; 558 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK); 559 560 if (_cp_patches != NULL) { 561 // need to treat this_class specially... 562 563 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*" 564 // for now. These will be replaced with actual names of the patched classes in patch_class(). 565 Symbol* s = vmSymbols::star_name(); 566 for (int n=_orig_cp_size; n<cp->length(); n++) { 567 cp->symbol_at_put(n, s); 568 } 569 570 int this_class_index; 571 { 572 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 573 const u1* const mark = stream->current(); 574 stream->skip_u2_fast(1); // skip flags 575 this_class_index = stream->get_u2_fast(); 576 stream->set_current(mark); // revert to mark 577 } 578 579 for (index = 1; index < length; index++) { // Index 0 is unused 580 if (has_cp_patch_at(index)) { 581 guarantee_property(index != this_class_index, 582 "Illegal constant pool patch to self at %d in class file %s", 583 index, CHECK); 584 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 585 } 586 } 587 } 588 589 if (!_need_verify) { 590 return; 591 } 592 593 // second verification pass - checks the strings are of the right format. 594 // but not yet to the other entries 595 for (index = 1; index < length; index++) { 596 const jbyte tag = cp->tag_at(index).value(); 597 switch (tag) { 598 case JVM_CONSTANT_UnresolvedClass: { 599 const Symbol* const class_name = cp->klass_name_at(index); 600 // check the name, even if _cp_patches will overwrite it 601 verify_legal_class_name(class_name, CHECK); 602 break; 603 } 604 case JVM_CONSTANT_NameAndType: { 605 if (_need_verify) { 606 const int sig_index = cp->signature_ref_index_at(index); 607 const int name_index = cp->name_ref_index_at(index); 608 const Symbol* const name = cp->symbol_at(name_index); 609 const Symbol* const sig = cp->symbol_at(sig_index); 610 guarantee_property(sig->utf8_length() != 0, 611 "Illegal zero length constant pool entry at %d in class %s", 612 sig_index, CHECK); 613 guarantee_property(name->utf8_length() != 0, 614 "Illegal zero length constant pool entry at %d in class %s", 615 name_index, CHECK); 616 617 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 618 // Format check method name and signature 619 verify_legal_method_name(name, CHECK); 620 verify_legal_method_signature(name, sig, CHECK); 621 } else { 622 // Format check field name and signature 623 verify_legal_field_name(name, CHECK); 624 verify_legal_field_signature(name, sig, CHECK); 625 } 626 } 627 break; 628 } 629 case JVM_CONSTANT_InvokeDynamic: 630 case JVM_CONSTANT_Fieldref: 631 case JVM_CONSTANT_Methodref: 632 case JVM_CONSTANT_InterfaceMethodref: { 633 const int name_and_type_ref_index = 634 cp->name_and_type_ref_index_at(index); 635 // already verified to be utf8 636 const int name_ref_index = 637 cp->name_ref_index_at(name_and_type_ref_index); 638 // already verified to be utf8 639 const int signature_ref_index = 640 cp->signature_ref_index_at(name_and_type_ref_index); 641 const Symbol* const name = cp->symbol_at(name_ref_index); 642 const Symbol* const signature = cp->symbol_at(signature_ref_index); 643 if (tag == JVM_CONSTANT_Fieldref) { 644 if (_need_verify) { 645 // Field name and signature are verified above, when iterating NameAndType_info. 646 // Need only to be sure signature is non-zero length and the right type. 647 if (signature->utf8_length() == 0 || 648 signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 649 throwIllegalSignature("Field", name, signature, CHECK); 650 } 651 } 652 } else { 653 if (_need_verify) { 654 // Method name and signature are verified above, when iterating NameAndType_info. 655 // Need only to be sure signature is non-zero length and the right type. 656 if (signature->utf8_length() == 0 || 657 signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 658 throwIllegalSignature("Method", name, signature, CHECK); 659 } 660 } 661 // 4509014: If a class method name begins with '<', it must be "<init>" 662 const unsigned int name_len = name->utf8_length(); 663 if (tag == JVM_CONSTANT_Methodref && 664 name_len != 0 && 665 name->byte_at(0) == '<' && 666 name != vmSymbols::object_initializer_name()) { 667 classfile_parse_error( 668 "Bad method name at constant pool index %u in class file %s", 669 name_ref_index, CHECK); 670 } 671 } 672 break; 673 } 674 case JVM_CONSTANT_MethodHandle: { 675 const int ref_index = cp->method_handle_index_at(index); 676 const int ref_kind = cp->method_handle_ref_kind_at(index); 677 switch (ref_kind) { 678 case JVM_REF_invokeVirtual: 679 case JVM_REF_invokeStatic: 680 case JVM_REF_invokeSpecial: 681 case JVM_REF_newInvokeSpecial: { 682 const int name_and_type_ref_index = 683 cp->name_and_type_ref_index_at(ref_index); 684 const int name_ref_index = 685 cp->name_ref_index_at(name_and_type_ref_index); 686 const Symbol* const name = cp->symbol_at(name_ref_index); 687 if (ref_kind == JVM_REF_newInvokeSpecial) { 688 if (name != vmSymbols::object_initializer_name()) { 689 classfile_parse_error( 690 "Bad constructor name at constant pool index %u in class file %s", 691 name_ref_index, CHECK); 692 } 693 } else { 694 if (name == vmSymbols::object_initializer_name()) { 695 classfile_parse_error( 696 "Bad method name at constant pool index %u in class file %s", 697 name_ref_index, CHECK); 698 } 699 } 700 break; 701 } 702 // Other ref_kinds are already fully checked in previous pass. 703 } // switch(ref_kind) 704 break; 705 } 706 case JVM_CONSTANT_MethodType: { 707 const Symbol* const no_name = vmSymbols::type_name(); // place holder 708 const Symbol* const signature = cp->method_type_signature_at(index); 709 verify_legal_method_signature(no_name, signature, CHECK); 710 break; 711 } 712 case JVM_CONSTANT_Utf8: { 713 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 714 } 715 } // switch(tag) 716 } // end of for 717} 718 719void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) { 720 int name_index = _orig_cp_size + _num_patched_klasses; 721 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses; 722 723 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name); 724 _num_patched_klasses ++; 725} 726 727void ClassFileParser::patch_constant_pool(ConstantPool* cp, 728 int index, 729 Handle patch, 730 TRAPS) { 731 assert(cp != NULL, "invariant"); 732 733 BasicType patch_type = T_VOID; 734 735 switch (cp->tag_at(index).value()) { 736 737 case JVM_CONSTANT_UnresolvedClass: { 738 // Patching a class means pre-resolving it. 739 // The name in the constant pool is ignored. 740 if (java_lang_Class::is_instance(patch())) { 741 guarantee_property(!java_lang_Class::is_primitive(patch()), 742 "Illegal class patch at %d in class file %s", 743 index, CHECK); 744 Klass* k = java_lang_Class::as_Klass(patch()); 745 patch_class(cp, index, k, k->name()); 746 } else { 747 guarantee_property(java_lang_String::is_instance(patch()), 748 "Illegal class patch at %d in class file %s", 749 index, CHECK); 750 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 751 patch_class(cp, index, NULL, name); 752 } 753 break; 754 } 755 756 case JVM_CONSTANT_String: { 757 // skip this patch and don't clear it. Needs the oop array for resolved 758 // references to be created first. 759 return; 760 } 761 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 762 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 763 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 764 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 765 patch_prim: 766 { 767 jvalue value; 768 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 769 guarantee_property(value_type == patch_type, 770 "Illegal primitive patch at %d in class file %s", 771 index, CHECK); 772 switch (value_type) { 773 case T_INT: cp->int_at_put(index, value.i); break; 774 case T_FLOAT: cp->float_at_put(index, value.f); break; 775 case T_LONG: cp->long_at_put(index, value.j); break; 776 case T_DOUBLE: cp->double_at_put(index, value.d); break; 777 default: assert(false, ""); 778 } 779 } // end patch_prim label 780 break; 781 782 default: { 783 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 784 guarantee_property(!has_cp_patch_at(index), 785 "Illegal unexpected patch at %d in class file %s", 786 index, CHECK); 787 return; 788 } 789 } // end of switch(tag) 790 791 // On fall-through, mark the patch as used. 792 clear_cp_patch_at(index); 793} 794class NameSigHash: public ResourceObj { 795 public: 796 const Symbol* _name; // name 797 const Symbol* _sig; // signature 798 NameSigHash* _next; // Next entry in hash table 799}; 800 801static const int HASH_ROW_SIZE = 256; 802 803static unsigned int hash(const Symbol* name, const Symbol* sig) { 804 unsigned int raw_hash = 0; 805 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 806 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 807 808 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 809} 810 811 812static void initialize_hashtable(NameSigHash** table) { 813 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 814} 815// Return false if the name/sig combination is found in table. 816// Return true if no duplicate is found. And name/sig is added as a new entry in table. 817// The old format checker uses heap sort to find duplicates. 818// NOTE: caller should guarantee that GC doesn't happen during the life cycle 819// of table since we don't expect Symbol*'s to move. 820static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 821 assert(name != NULL, "name in constant pool is NULL"); 822 823 // First lookup for duplicates 824 int index = hash(name, sig); 825 NameSigHash* entry = table[index]; 826 while (entry != NULL) { 827 if (entry->_name == name && entry->_sig == sig) { 828 return false; 829 } 830 entry = entry->_next; 831 } 832 833 // No duplicate is found, allocate a new entry and fill it. 834 entry = new NameSigHash(); 835 entry->_name = name; 836 entry->_sig = sig; 837 838 // Insert into hash table 839 entry->_next = table[index]; 840 table[index] = entry; 841 842 return true; 843} 844 845// Side-effects: populates the _local_interfaces field 846void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 847 const int itfs_len, 848 ConstantPool* const cp, 849 bool* const has_nonstatic_concrete_methods, 850 TRAPS) { 851 assert(stream != NULL, "invariant"); 852 assert(cp != NULL, "invariant"); 853 assert(has_nonstatic_concrete_methods != NULL, "invariant"); 854 855 if (itfs_len == 0) { 856 _local_interfaces = Universe::the_empty_klass_array(); 857 } else { 858 assert(itfs_len > 0, "only called for len>0"); 859 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 860 861 int index; 862 for (index = 0; index < itfs_len; index++) { 863 const u2 interface_index = stream->get_u2(CHECK); 864 Klass* interf; 865 check_property( 866 valid_klass_reference_at(interface_index), 867 "Interface name has bad constant pool index %u in class file %s", 868 interface_index, CHECK); 869 if (cp->tag_at(interface_index).is_klass()) { 870 interf = cp->resolved_klass_at(interface_index); 871 } else { 872 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 873 874 // Don't need to check legal name because it's checked when parsing constant pool. 875 // But need to make sure it's not an array type. 876 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 877 "Bad interface name in class file %s", CHECK); 878 879 // Call resolve_super so classcircularity is checked 880 interf = SystemDictionary::resolve_super_or_fail( 881 _class_name, 882 unresolved_klass, 883 Handle(THREAD, _loader_data->class_loader()), 884 _protection_domain, 885 false, 886 CHECK); 887 } 888 889 if (!interf->is_interface()) { 890 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 891 "Implementing class"); 892 } 893 894 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) { 895 *has_nonstatic_concrete_methods = true; 896 } 897 _local_interfaces->at_put(index, interf); 898 } 899 900 if (!_need_verify || itfs_len <= 1) { 901 return; 902 } 903 904 // Check if there's any duplicates in interfaces 905 ResourceMark rm(THREAD); 906 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 907 NameSigHash*, 908 HASH_ROW_SIZE); 909 initialize_hashtable(interface_names); 910 bool dup = false; 911 const Symbol* name = NULL; 912 { 913 debug_only(NoSafepointVerifier nsv;) 914 for (index = 0; index < itfs_len; index++) { 915 const Klass* const k = _local_interfaces->at(index); 916 name = InstanceKlass::cast(k)->name(); 917 // If no duplicates, add (name, NULL) in hashtable interface_names. 918 if (!put_after_lookup(name, NULL, interface_names)) { 919 dup = true; 920 break; 921 } 922 } 923 } 924 if (dup) { 925 classfile_parse_error("Duplicate interface name \"%s\" in class file %s", 926 name->as_C_string(), CHECK); 927 } 928 } 929} 930 931void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 932 int constantvalue_index, 933 int signature_index, 934 TRAPS) const { 935 // Make sure the constant pool entry is of a type appropriate to this field 936 guarantee_property( 937 (constantvalue_index > 0 && 938 constantvalue_index < cp->length()), 939 "Bad initial value index %u in ConstantValue attribute in class file %s", 940 constantvalue_index, CHECK); 941 942 const constantTag value_type = cp->tag_at(constantvalue_index); 943 switch(cp->basic_type_for_signature_at(signature_index)) { 944 case T_LONG: { 945 guarantee_property(value_type.is_long(), 946 "Inconsistent constant value type in class file %s", 947 CHECK); 948 break; 949 } 950 case T_FLOAT: { 951 guarantee_property(value_type.is_float(), 952 "Inconsistent constant value type in class file %s", 953 CHECK); 954 break; 955 } 956 case T_DOUBLE: { 957 guarantee_property(value_type.is_double(), 958 "Inconsistent constant value type in class file %s", 959 CHECK); 960 break; 961 } 962 case T_BYTE: 963 case T_CHAR: 964 case T_SHORT: 965 case T_BOOLEAN: 966 case T_INT: { 967 guarantee_property(value_type.is_int(), 968 "Inconsistent constant value type in class file %s", 969 CHECK); 970 break; 971 } 972 case T_OBJECT: { 973 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 974 && value_type.is_string()), 975 "Bad string initial value in class file %s", 976 CHECK); 977 break; 978 } 979 default: { 980 classfile_parse_error("Unable to set initial value %u in class file %s", 981 constantvalue_index, 982 CHECK); 983 } 984 } 985} 986 987class AnnotationCollector : public ResourceObj{ 988public: 989 enum Location { _in_field, _in_method, _in_class }; 990 enum ID { 991 _unknown = 0, 992 _method_CallerSensitive, 993 _method_ForceInline, 994 _method_DontInline, 995 _method_InjectedProfile, 996 _method_LambdaForm_Compiled, 997 _method_LambdaForm_Hidden, 998 _method_HotSpotIntrinsicCandidate, 999 _jdk_internal_vm_annotation_Contended, 1000 _field_Stable, 1001 _jdk_internal_vm_annotation_ReservedStackAccess, 1002 _annotation_LIMIT 1003 }; 1004 const Location _location; 1005 int _annotations_present; 1006 u2 _contended_group; 1007 1008 AnnotationCollector(Location location) 1009 : _location(location), _annotations_present(0) 1010 { 1011 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 1012 } 1013 // If this annotation name has an ID, report it (or _none). 1014 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 1015 // Set the annotation name: 1016 void set_annotation(ID id) { 1017 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 1018 _annotations_present |= nth_bit((int)id); 1019 } 1020 1021 void remove_annotation(ID id) { 1022 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 1023 _annotations_present &= ~nth_bit((int)id); 1024 } 1025 1026 // Report if the annotation is present. 1027 bool has_any_annotations() const { return _annotations_present != 0; } 1028 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 1029 1030 void set_contended_group(u2 group) { _contended_group = group; } 1031 u2 contended_group() const { return _contended_group; } 1032 1033 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 1034 1035 void set_stable(bool stable) { set_annotation(_field_Stable); } 1036 bool is_stable() const { return has_annotation(_field_Stable); } 1037}; 1038 1039// This class also doubles as a holder for metadata cleanup. 1040class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 1041private: 1042 ClassLoaderData* _loader_data; 1043 AnnotationArray* _field_annotations; 1044 AnnotationArray* _field_type_annotations; 1045public: 1046 FieldAnnotationCollector(ClassLoaderData* loader_data) : 1047 AnnotationCollector(_in_field), 1048 _loader_data(loader_data), 1049 _field_annotations(NULL), 1050 _field_type_annotations(NULL) {} 1051 ~FieldAnnotationCollector(); 1052 void apply_to(FieldInfo* f); 1053 AnnotationArray* field_annotations() { return _field_annotations; } 1054 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1055 1056 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1057 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1058}; 1059 1060class MethodAnnotationCollector : public AnnotationCollector{ 1061public: 1062 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1063 void apply_to(const methodHandle& m); 1064}; 1065 1066class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1067public: 1068 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1069 void apply_to(InstanceKlass* ik); 1070}; 1071 1072 1073static int skip_annotation_value(const u1*, int, int); // fwd decl 1074 1075// Safely increment index by val if does not pass limit 1076#define SAFE_ADD(index, limit, val) \ 1077if (index >= limit - val) return limit; \ 1078index += val; 1079 1080// Skip an annotation. Return >=limit if there is any problem. 1081static int skip_annotation(const u1* buffer, int limit, int index) { 1082 assert(buffer != NULL, "invariant"); 1083 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1084 // value := switch (tag:u1) { ... } 1085 SAFE_ADD(index, limit, 4); // skip atype and read nmem 1086 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1087 while (--nmem >= 0 && index < limit) { 1088 SAFE_ADD(index, limit, 2); // skip member 1089 index = skip_annotation_value(buffer, limit, index); 1090 } 1091 return index; 1092} 1093 1094// Skip an annotation value. Return >=limit if there is any problem. 1095static int skip_annotation_value(const u1* buffer, int limit, int index) { 1096 assert(buffer != NULL, "invariant"); 1097 1098 // value := switch (tag:u1) { 1099 // case B, C, I, S, Z, D, F, J, c: con:u2; 1100 // case e: e_class:u2 e_name:u2; 1101 // case s: s_con:u2; 1102 // case [: do(nval:u2) {value}; 1103 // case @: annotation; 1104 // case s: s_con:u2; 1105 // } 1106 SAFE_ADD(index, limit, 1); // read tag 1107 const u1 tag = buffer[index - 1]; 1108 switch (tag) { 1109 case 'B': 1110 case 'C': 1111 case 'I': 1112 case 'S': 1113 case 'Z': 1114 case 'D': 1115 case 'F': 1116 case 'J': 1117 case 'c': 1118 case 's': 1119 SAFE_ADD(index, limit, 2); // skip con or s_con 1120 break; 1121 case 'e': 1122 SAFE_ADD(index, limit, 4); // skip e_class, e_name 1123 break; 1124 case '[': 1125 { 1126 SAFE_ADD(index, limit, 2); // read nval 1127 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1128 while (--nval >= 0 && index < limit) { 1129 index = skip_annotation_value(buffer, limit, index); 1130 } 1131 } 1132 break; 1133 case '@': 1134 index = skip_annotation(buffer, limit, index); 1135 break; 1136 default: 1137 return limit; // bad tag byte 1138 } 1139 return index; 1140} 1141 1142// Sift through annotations, looking for those significant to the VM: 1143static void parse_annotations(const ConstantPool* const cp, 1144 const u1* buffer, int limit, 1145 AnnotationCollector* coll, 1146 ClassLoaderData* loader_data, 1147 TRAPS) { 1148 1149 assert(cp != NULL, "invariant"); 1150 assert(buffer != NULL, "invariant"); 1151 assert(coll != NULL, "invariant"); 1152 assert(loader_data != NULL, "invariant"); 1153 1154 // annotations := do(nann:u2) {annotation} 1155 int index = 2; // read nann 1156 if (index >= limit) return; 1157 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1158 enum { // initial annotation layout 1159 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1160 count_off = 2, // u2 such as 1 (one value) 1161 member_off = 4, // utf8 such as 'value' 1162 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1163 e_tag_val = 'e', 1164 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1165 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1166 e_size = 11, // end of 'e' annotation 1167 c_tag_val = 'c', // payload is type 1168 c_con_off = 7, // utf8 payload, such as 'I' 1169 c_size = 9, // end of 'c' annotation 1170 s_tag_val = 's', // payload is String 1171 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1172 s_size = 9, 1173 min_size = 6 // smallest possible size (zero members) 1174 }; 1175 // Cannot add min_size to index in case of overflow MAX_INT 1176 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) { 1177 int index0 = index; 1178 index = skip_annotation(buffer, limit, index); 1179 const u1* const abase = buffer + index0; 1180 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1181 const int count = Bytes::get_Java_u2((address)abase + count_off); 1182 const Symbol* const aname = check_symbol_at(cp, atype); 1183 if (aname == NULL) break; // invalid annotation name 1184 const Symbol* member = NULL; 1185 if (count >= 1) { 1186 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1187 member = check_symbol_at(cp, member_index); 1188 if (member == NULL) break; // invalid member name 1189 } 1190 1191 // Here is where parsing particular annotations will take place. 1192 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1193 if (AnnotationCollector::_unknown == id) continue; 1194 coll->set_annotation(id); 1195 1196 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1197 // @Contended can optionally specify the contention group. 1198 // 1199 // Contended group defines the equivalence class over the fields: 1200 // the fields within the same contended group are not treated distinct. 1201 // The only exception is default group, which does not incur the 1202 // equivalence. Naturally, contention group for classes is meaningless. 1203 // 1204 // While the contention group is specified as String, annotation 1205 // values are already interned, and we might as well use the constant 1206 // pool index as the group tag. 1207 // 1208 u2 group_index = 0; // default contended group 1209 if (count == 1 1210 && s_size == (index - index0) // match size 1211 && s_tag_val == *(abase + tag_off) 1212 && member == vmSymbols::value_name()) { 1213 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1214 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1215 group_index = 0; // default contended group 1216 } 1217 } 1218 coll->set_contended_group(group_index); 1219 } 1220 } 1221} 1222 1223 1224// Parse attributes for a field. 1225void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1226 u2 attributes_count, 1227 bool is_static, u2 signature_index, 1228 u2* const constantvalue_index_addr, 1229 bool* const is_synthetic_addr, 1230 u2* const generic_signature_index_addr, 1231 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1232 TRAPS) { 1233 assert(cfs != NULL, "invariant"); 1234 assert(constantvalue_index_addr != NULL, "invariant"); 1235 assert(is_synthetic_addr != NULL, "invariant"); 1236 assert(generic_signature_index_addr != NULL, "invariant"); 1237 assert(parsed_annotations != NULL, "invariant"); 1238 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1239 1240 u2 constantvalue_index = 0; 1241 u2 generic_signature_index = 0; 1242 bool is_synthetic = false; 1243 const u1* runtime_visible_annotations = NULL; 1244 int runtime_visible_annotations_length = 0; 1245 const u1* runtime_invisible_annotations = NULL; 1246 int runtime_invisible_annotations_length = 0; 1247 const u1* runtime_visible_type_annotations = NULL; 1248 int runtime_visible_type_annotations_length = 0; 1249 const u1* runtime_invisible_type_annotations = NULL; 1250 int runtime_invisible_type_annotations_length = 0; 1251 bool runtime_invisible_annotations_exists = false; 1252 bool runtime_invisible_type_annotations_exists = false; 1253 const ConstantPool* const cp = _cp; 1254 1255 while (attributes_count--) { 1256 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1257 const u2 attribute_name_index = cfs->get_u2_fast(); 1258 const u4 attribute_length = cfs->get_u4_fast(); 1259 check_property(valid_symbol_at(attribute_name_index), 1260 "Invalid field attribute index %u in class file %s", 1261 attribute_name_index, 1262 CHECK); 1263 1264 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1265 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1266 // ignore if non-static 1267 if (constantvalue_index != 0) { 1268 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1269 } 1270 check_property( 1271 attribute_length == 2, 1272 "Invalid ConstantValue field attribute length %u in class file %s", 1273 attribute_length, CHECK); 1274 1275 constantvalue_index = cfs->get_u2(CHECK); 1276 if (_need_verify) { 1277 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1278 } 1279 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1280 if (attribute_length != 0) { 1281 classfile_parse_error( 1282 "Invalid Synthetic field attribute length %u in class file %s", 1283 attribute_length, CHECK); 1284 } 1285 is_synthetic = true; 1286 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1287 if (attribute_length != 0) { 1288 classfile_parse_error( 1289 "Invalid Deprecated field attribute length %u in class file %s", 1290 attribute_length, CHECK); 1291 } 1292 } else if (_major_version >= JAVA_1_5_VERSION) { 1293 if (attribute_name == vmSymbols::tag_signature()) { 1294 if (generic_signature_index != 0) { 1295 classfile_parse_error( 1296 "Multiple Signature attributes for field in class file %s", CHECK); 1297 } 1298 if (attribute_length != 2) { 1299 classfile_parse_error( 1300 "Wrong size %u for field's Signature attribute in class file %s", 1301 attribute_length, CHECK); 1302 } 1303 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1304 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1305 if (runtime_visible_annotations != NULL) { 1306 classfile_parse_error( 1307 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1308 } 1309 runtime_visible_annotations_length = attribute_length; 1310 runtime_visible_annotations = cfs->current(); 1311 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1312 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 1313 parse_annotations(cp, 1314 runtime_visible_annotations, 1315 runtime_visible_annotations_length, 1316 parsed_annotations, 1317 _loader_data, 1318 CHECK); 1319 cfs->skip_u1_fast(runtime_visible_annotations_length); 1320 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1321 if (runtime_invisible_annotations_exists) { 1322 classfile_parse_error( 1323 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1324 } 1325 runtime_invisible_annotations_exists = true; 1326 if (PreserveAllAnnotations) { 1327 runtime_invisible_annotations_length = attribute_length; 1328 runtime_invisible_annotations = cfs->current(); 1329 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1330 } 1331 cfs->skip_u1(attribute_length, CHECK); 1332 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1333 if (runtime_visible_type_annotations != NULL) { 1334 classfile_parse_error( 1335 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1336 } 1337 runtime_visible_type_annotations_length = attribute_length; 1338 runtime_visible_type_annotations = cfs->current(); 1339 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1340 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1341 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1342 if (runtime_invisible_type_annotations_exists) { 1343 classfile_parse_error( 1344 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1345 } else { 1346 runtime_invisible_type_annotations_exists = true; 1347 } 1348 if (PreserveAllAnnotations) { 1349 runtime_invisible_type_annotations_length = attribute_length; 1350 runtime_invisible_type_annotations = cfs->current(); 1351 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1352 } 1353 cfs->skip_u1(attribute_length, CHECK); 1354 } else { 1355 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1356 } 1357 } else { 1358 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1359 } 1360 } 1361 1362 *constantvalue_index_addr = constantvalue_index; 1363 *is_synthetic_addr = is_synthetic; 1364 *generic_signature_index_addr = generic_signature_index; 1365 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1366 runtime_visible_annotations_length, 1367 runtime_invisible_annotations, 1368 runtime_invisible_annotations_length, 1369 CHECK); 1370 parsed_annotations->set_field_annotations(a); 1371 a = assemble_annotations(runtime_visible_type_annotations, 1372 runtime_visible_type_annotations_length, 1373 runtime_invisible_type_annotations, 1374 runtime_invisible_type_annotations_length, 1375 CHECK); 1376 parsed_annotations->set_field_type_annotations(a); 1377 return; 1378} 1379 1380 1381// Field allocation types. Used for computing field offsets. 1382 1383enum FieldAllocationType { 1384 STATIC_OOP, // Oops 1385 STATIC_BYTE, // Boolean, Byte, char 1386 STATIC_SHORT, // shorts 1387 STATIC_WORD, // ints 1388 STATIC_DOUBLE, // aligned long or double 1389 NONSTATIC_OOP, 1390 NONSTATIC_BYTE, 1391 NONSTATIC_SHORT, 1392 NONSTATIC_WORD, 1393 NONSTATIC_DOUBLE, 1394 MAX_FIELD_ALLOCATION_TYPE, 1395 BAD_ALLOCATION_TYPE = -1 1396}; 1397 1398static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1399 BAD_ALLOCATION_TYPE, // 0 1400 BAD_ALLOCATION_TYPE, // 1 1401 BAD_ALLOCATION_TYPE, // 2 1402 BAD_ALLOCATION_TYPE, // 3 1403 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1404 NONSTATIC_SHORT, // T_CHAR = 5, 1405 NONSTATIC_WORD, // T_FLOAT = 6, 1406 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1407 NONSTATIC_BYTE, // T_BYTE = 8, 1408 NONSTATIC_SHORT, // T_SHORT = 9, 1409 NONSTATIC_WORD, // T_INT = 10, 1410 NONSTATIC_DOUBLE, // T_LONG = 11, 1411 NONSTATIC_OOP, // T_OBJECT = 12, 1412 NONSTATIC_OOP, // T_ARRAY = 13, 1413 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1414 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1415 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1416 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1417 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1418 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1419 BAD_ALLOCATION_TYPE, // 0 1420 BAD_ALLOCATION_TYPE, // 1 1421 BAD_ALLOCATION_TYPE, // 2 1422 BAD_ALLOCATION_TYPE, // 3 1423 STATIC_BYTE , // T_BOOLEAN = 4, 1424 STATIC_SHORT, // T_CHAR = 5, 1425 STATIC_WORD, // T_FLOAT = 6, 1426 STATIC_DOUBLE, // T_DOUBLE = 7, 1427 STATIC_BYTE, // T_BYTE = 8, 1428 STATIC_SHORT, // T_SHORT = 9, 1429 STATIC_WORD, // T_INT = 10, 1430 STATIC_DOUBLE, // T_LONG = 11, 1431 STATIC_OOP, // T_OBJECT = 12, 1432 STATIC_OOP, // T_ARRAY = 13, 1433 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1434 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1435 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, 1436 BAD_ALLOCATION_TYPE, // T_METADATA = 17, 1437 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, 1438 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, 1439}; 1440 1441static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1442 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1443 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1444 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1445 return result; 1446} 1447 1448class ClassFileParser::FieldAllocationCount : public ResourceObj { 1449 public: 1450 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1451 1452 FieldAllocationCount() { 1453 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1454 count[i] = 0; 1455 } 1456 } 1457 1458 FieldAllocationType update(bool is_static, BasicType type) { 1459 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1460 if (atype != BAD_ALLOCATION_TYPE) { 1461 // Make sure there is no overflow with injected fields. 1462 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1463 count[atype]++; 1464 } 1465 return atype; 1466 } 1467}; 1468 1469// Side-effects: populates the _fields, _fields_annotations, 1470// _fields_type_annotations fields 1471void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1472 bool is_interface, 1473 FieldAllocationCount* const fac, 1474 ConstantPool* cp, 1475 const int cp_size, 1476 u2* const java_fields_count_ptr, 1477 TRAPS) { 1478 1479 assert(cfs != NULL, "invariant"); 1480 assert(fac != NULL, "invariant"); 1481 assert(cp != NULL, "invariant"); 1482 assert(java_fields_count_ptr != NULL, "invariant"); 1483 1484 assert(NULL == _fields, "invariant"); 1485 assert(NULL == _fields_annotations, "invariant"); 1486 assert(NULL == _fields_type_annotations, "invariant"); 1487 1488 cfs->guarantee_more(2, CHECK); // length 1489 const u2 length = cfs->get_u2_fast(); 1490 *java_fields_count_ptr = length; 1491 1492 int num_injected = 0; 1493 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1494 &num_injected); 1495 const int total_fields = length + num_injected; 1496 1497 // The field array starts with tuples of shorts 1498 // [access, name index, sig index, initial value index, byte offset]. 1499 // A generic signature slot only exists for field with generic 1500 // signature attribute. And the access flag is set with 1501 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1502 // signature slots are at the end of the field array and after all 1503 // other fields data. 1504 // 1505 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1506 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1507 // ... 1508 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1509 // [generic signature index] 1510 // [generic signature index] 1511 // ... 1512 // 1513 // Allocate a temporary resource array for field data. For each field, 1514 // a slot is reserved in the temporary array for the generic signature 1515 // index. After parsing all fields, the data are copied to a permanent 1516 // array and any unused slots will be discarded. 1517 ResourceMark rm(THREAD); 1518 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1519 u2, 1520 total_fields * (FieldInfo::field_slots + 1)); 1521 1522 // The generic signature slots start after all other fields' data. 1523 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1524 int num_generic_signature = 0; 1525 for (int n = 0; n < length; n++) { 1526 // access_flags, name_index, descriptor_index, attributes_count 1527 cfs->guarantee_more(8, CHECK); 1528 1529 AccessFlags access_flags; 1530 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1531 verify_legal_field_modifiers(flags, is_interface, CHECK); 1532 access_flags.set_flags(flags); 1533 1534 const u2 name_index = cfs->get_u2_fast(); 1535 check_property(valid_symbol_at(name_index), 1536 "Invalid constant pool index %u for field name in class file %s", 1537 name_index, CHECK); 1538 const Symbol* const name = cp->symbol_at(name_index); 1539 verify_legal_field_name(name, CHECK); 1540 1541 const u2 signature_index = cfs->get_u2_fast(); 1542 check_property(valid_symbol_at(signature_index), 1543 "Invalid constant pool index %u for field signature in class file %s", 1544 signature_index, CHECK); 1545 const Symbol* const sig = cp->symbol_at(signature_index); 1546 verify_legal_field_signature(name, sig, CHECK); 1547 1548 u2 constantvalue_index = 0; 1549 bool is_synthetic = false; 1550 u2 generic_signature_index = 0; 1551 const bool is_static = access_flags.is_static(); 1552 FieldAnnotationCollector parsed_annotations(_loader_data); 1553 1554 const u2 attributes_count = cfs->get_u2_fast(); 1555 if (attributes_count > 0) { 1556 parse_field_attributes(cfs, 1557 attributes_count, 1558 is_static, 1559 signature_index, 1560 &constantvalue_index, 1561 &is_synthetic, 1562 &generic_signature_index, 1563 &parsed_annotations, 1564 CHECK); 1565 1566 if (parsed_annotations.field_annotations() != NULL) { 1567 if (_fields_annotations == NULL) { 1568 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1569 _loader_data, length, NULL, 1570 CHECK); 1571 } 1572 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1573 parsed_annotations.set_field_annotations(NULL); 1574 } 1575 if (parsed_annotations.field_type_annotations() != NULL) { 1576 if (_fields_type_annotations == NULL) { 1577 _fields_type_annotations = 1578 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1579 length, 1580 NULL, 1581 CHECK); 1582 } 1583 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1584 parsed_annotations.set_field_type_annotations(NULL); 1585 } 1586 1587 if (is_synthetic) { 1588 access_flags.set_is_synthetic(); 1589 } 1590 if (generic_signature_index != 0) { 1591 access_flags.set_field_has_generic_signature(); 1592 fa[generic_signature_slot] = generic_signature_index; 1593 generic_signature_slot ++; 1594 num_generic_signature ++; 1595 } 1596 } 1597 1598 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1599 field->initialize(access_flags.as_short(), 1600 name_index, 1601 signature_index, 1602 constantvalue_index); 1603 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1604 1605 // Remember how many oops we encountered and compute allocation type 1606 const FieldAllocationType atype = fac->update(is_static, type); 1607 field->set_allocation_type(atype); 1608 1609 // After field is initialized with type, we can augment it with aux info 1610 if (parsed_annotations.has_any_annotations()) 1611 parsed_annotations.apply_to(field); 1612 } 1613 1614 int index = length; 1615 if (num_injected != 0) { 1616 for (int n = 0; n < num_injected; n++) { 1617 // Check for duplicates 1618 if (injected[n].may_be_java) { 1619 const Symbol* const name = injected[n].name(); 1620 const Symbol* const signature = injected[n].signature(); 1621 bool duplicate = false; 1622 for (int i = 0; i < length; i++) { 1623 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1624 if (name == cp->symbol_at(f->name_index()) && 1625 signature == cp->symbol_at(f->signature_index())) { 1626 // Symbol is desclared in Java so skip this one 1627 duplicate = true; 1628 break; 1629 } 1630 } 1631 if (duplicate) { 1632 // These will be removed from the field array at the end 1633 continue; 1634 } 1635 } 1636 1637 // Injected field 1638 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1639 field->initialize(JVM_ACC_FIELD_INTERNAL, 1640 injected[n].name_index, 1641 injected[n].signature_index, 1642 0); 1643 1644 const BasicType type = FieldType::basic_type(injected[n].signature()); 1645 1646 // Remember how many oops we encountered and compute allocation type 1647 const FieldAllocationType atype = fac->update(false, type); 1648 field->set_allocation_type(atype); 1649 index++; 1650 } 1651 } 1652 1653 assert(NULL == _fields, "invariant"); 1654 1655 _fields = 1656 MetadataFactory::new_array<u2>(_loader_data, 1657 index * FieldInfo::field_slots + num_generic_signature, 1658 CHECK); 1659 // Sometimes injected fields already exist in the Java source so 1660 // the fields array could be too long. In that case the 1661 // fields array is trimed. Also unused slots that were reserved 1662 // for generic signature indexes are discarded. 1663 { 1664 int i = 0; 1665 for (; i < index * FieldInfo::field_slots; i++) { 1666 _fields->at_put(i, fa[i]); 1667 } 1668 for (int j = total_fields * FieldInfo::field_slots; 1669 j < generic_signature_slot; j++) { 1670 _fields->at_put(i++, fa[j]); 1671 } 1672 assert(_fields->length() == i, ""); 1673 } 1674 1675 if (_need_verify && length > 1) { 1676 // Check duplicated fields 1677 ResourceMark rm(THREAD); 1678 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1679 THREAD, NameSigHash*, HASH_ROW_SIZE); 1680 initialize_hashtable(names_and_sigs); 1681 bool dup = false; 1682 const Symbol* name = NULL; 1683 const Symbol* sig = NULL; 1684 { 1685 debug_only(NoSafepointVerifier nsv;) 1686 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1687 name = fs.name(); 1688 sig = fs.signature(); 1689 // If no duplicates, add name/signature in hashtable names_and_sigs. 1690 if (!put_after_lookup(name, sig, names_and_sigs)) { 1691 dup = true; 1692 break; 1693 } 1694 } 1695 } 1696 if (dup) { 1697 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s", 1698 name->as_C_string(), sig->as_klass_external_name(), CHECK); 1699 } 1700 } 1701} 1702 1703 1704const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1705 u4 code_length, 1706 u4 exception_table_length, 1707 TRAPS) { 1708 assert(cfs != NULL, "invariant"); 1709 1710 const unsafe_u2* const exception_table_start = cfs->current(); 1711 assert(exception_table_start != NULL, "null exception table"); 1712 1713 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1714 // end_pc, 1715 // handler_pc, 1716 // catch_type_index 1717 1718 // Will check legal target after parsing code array in verifier. 1719 if (_need_verify) { 1720 for (unsigned int i = 0; i < exception_table_length; i++) { 1721 const u2 start_pc = cfs->get_u2_fast(); 1722 const u2 end_pc = cfs->get_u2_fast(); 1723 const u2 handler_pc = cfs->get_u2_fast(); 1724 const u2 catch_type_index = cfs->get_u2_fast(); 1725 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1726 "Illegal exception table range in class file %s", 1727 CHECK_NULL); 1728 guarantee_property(handler_pc < code_length, 1729 "Illegal exception table handler in class file %s", 1730 CHECK_NULL); 1731 if (catch_type_index != 0) { 1732 guarantee_property(valid_klass_reference_at(catch_type_index), 1733 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1734 } 1735 } 1736 } else { 1737 cfs->skip_u2_fast(exception_table_length * 4); 1738 } 1739 return exception_table_start; 1740} 1741 1742void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1743 u4 code_length, 1744 CompressedLineNumberWriteStream**const write_stream, 1745 TRAPS) { 1746 1747 const ClassFileStream* const cfs = _stream; 1748 unsigned int num_entries = cfs->get_u2(CHECK); 1749 1750 // Each entry is a u2 start_pc, and a u2 line_number 1751 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1752 1753 // Verify line number attribute and table length 1754 check_property( 1755 code_attribute_length == sizeof(u2) + length_in_bytes, 1756 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1757 1758 cfs->guarantee_more(length_in_bytes, CHECK); 1759 1760 if ((*write_stream) == NULL) { 1761 if (length_in_bytes > fixed_buffer_size) { 1762 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1763 } else { 1764 (*write_stream) = new CompressedLineNumberWriteStream( 1765 _linenumbertable_buffer, fixed_buffer_size); 1766 } 1767 } 1768 1769 while (num_entries-- > 0) { 1770 const u2 bci = cfs->get_u2_fast(); // start_pc 1771 const u2 line = cfs->get_u2_fast(); // line_number 1772 guarantee_property(bci < code_length, 1773 "Invalid pc in LineNumberTable in class file %s", CHECK); 1774 (*write_stream)->write_pair(bci, line); 1775 } 1776} 1777 1778 1779class LVT_Hash : public AllStatic { 1780 public: 1781 1782 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1783 /* 1784 * 3-tuple start_bci/length/slot has to be unique key, 1785 * so the following comparison seems to be redundant: 1786 * && elem->name_cp_index == entry->_elem->name_cp_index 1787 */ 1788 return (e0.start_bci == e1.start_bci && 1789 e0.length == e1.length && 1790 e0.name_cp_index == e1.name_cp_index && 1791 e0.slot == e1.slot); 1792 } 1793 1794 static unsigned int hash(LocalVariableTableElement const& e0) { 1795 unsigned int raw_hash = e0.start_bci; 1796 1797 raw_hash = e0.length + raw_hash * 37; 1798 raw_hash = e0.name_cp_index + raw_hash * 37; 1799 raw_hash = e0.slot + raw_hash * 37; 1800 1801 return raw_hash; 1802 } 1803}; 1804 1805 1806// Class file LocalVariableTable elements. 1807class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1808 public: 1809 u2 start_bci; 1810 u2 length; 1811 u2 name_cp_index; 1812 u2 descriptor_cp_index; 1813 u2 slot; 1814}; 1815 1816static void copy_lvt_element(const Classfile_LVT_Element* const src, 1817 LocalVariableTableElement* const lvt) { 1818 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1819 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1820 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1821 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1822 lvt->signature_cp_index = 0; 1823 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1824} 1825 1826// Function is used to parse both attributes: 1827// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1828const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1829 u4 code_length, 1830 u2 max_locals, 1831 u4 code_attribute_length, 1832 u2* const localvariable_table_length, 1833 bool isLVTT, 1834 TRAPS) { 1835 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1836 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1837 const unsigned int size = 1838 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1839 1840 const ConstantPool* const cp = _cp; 1841 1842 // Verify local variable table attribute has right length 1843 if (_need_verify) { 1844 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1845 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1846 } 1847 1848 const unsafe_u2* const localvariable_table_start = cfs->current(); 1849 assert(localvariable_table_start != NULL, "null local variable table"); 1850 if (!_need_verify) { 1851 cfs->skip_u2_fast(size); 1852 } else { 1853 cfs->guarantee_more(size * 2, CHECK_NULL); 1854 for(int i = 0; i < (*localvariable_table_length); i++) { 1855 const u2 start_pc = cfs->get_u2_fast(); 1856 const u2 length = cfs->get_u2_fast(); 1857 const u2 name_index = cfs->get_u2_fast(); 1858 const u2 descriptor_index = cfs->get_u2_fast(); 1859 const u2 index = cfs->get_u2_fast(); 1860 // Assign to a u4 to avoid overflow 1861 const u4 end_pc = (u4)start_pc + (u4)length; 1862 1863 if (start_pc >= code_length) { 1864 classfile_parse_error( 1865 "Invalid start_pc %u in %s in class file %s", 1866 start_pc, tbl_name, CHECK_NULL); 1867 } 1868 if (end_pc > code_length) { 1869 classfile_parse_error( 1870 "Invalid length %u in %s in class file %s", 1871 length, tbl_name, CHECK_NULL); 1872 } 1873 const int cp_size = cp->length(); 1874 guarantee_property(valid_symbol_at(name_index), 1875 "Name index %u in %s has bad constant type in class file %s", 1876 name_index, tbl_name, CHECK_NULL); 1877 guarantee_property(valid_symbol_at(descriptor_index), 1878 "Signature index %u in %s has bad constant type in class file %s", 1879 descriptor_index, tbl_name, CHECK_NULL); 1880 1881 const Symbol* const name = cp->symbol_at(name_index); 1882 const Symbol* const sig = cp->symbol_at(descriptor_index); 1883 verify_legal_field_name(name, CHECK_NULL); 1884 u2 extra_slot = 0; 1885 if (!isLVTT) { 1886 verify_legal_field_signature(name, sig, CHECK_NULL); 1887 1888 // 4894874: check special cases for double and long local variables 1889 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1890 sig == vmSymbols::type_signature(T_LONG)) { 1891 extra_slot = 1; 1892 } 1893 } 1894 guarantee_property((index + extra_slot) < max_locals, 1895 "Invalid index %u in %s in class file %s", 1896 index, tbl_name, CHECK_NULL); 1897 } 1898 } 1899 return localvariable_table_start; 1900} 1901 1902 1903void ClassFileParser::parse_type_array(u2 array_length, 1904 u4 code_length, 1905 u4* const u1_index, 1906 u4* const u2_index, 1907 u1* const u1_array, 1908 u2* const u2_array, 1909 TRAPS) { 1910 const ClassFileStream* const cfs = _stream; 1911 u2 index = 0; // index in the array with long/double occupying two slots 1912 u4 i1 = *u1_index; 1913 u4 i2 = *u2_index + 1; 1914 for(int i = 0; i < array_length; i++) { 1915 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1916 index++; 1917 if (tag == ITEM_Long || tag == ITEM_Double) { 1918 index++; 1919 } else if (tag == ITEM_Object) { 1920 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1921 guarantee_property(valid_klass_reference_at(class_index), 1922 "Bad class index %u in StackMap in class file %s", 1923 class_index, CHECK); 1924 } else if (tag == ITEM_Uninitialized) { 1925 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1926 guarantee_property( 1927 offset < code_length, 1928 "Bad uninitialized type offset %u in StackMap in class file %s", 1929 offset, CHECK); 1930 } else { 1931 guarantee_property( 1932 tag <= (u1)ITEM_Uninitialized, 1933 "Unknown variable type %u in StackMap in class file %s", 1934 tag, CHECK); 1935 } 1936 } 1937 u2_array[*u2_index] = index; 1938 *u1_index = i1; 1939 *u2_index = i2; 1940} 1941 1942static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1943 u4 code_attribute_length, 1944 bool need_verify, 1945 TRAPS) { 1946 assert(cfs != NULL, "invariant"); 1947 1948 if (0 == code_attribute_length) { 1949 return NULL; 1950 } 1951 1952 const u1* const stackmap_table_start = cfs->current(); 1953 assert(stackmap_table_start != NULL, "null stackmap table"); 1954 1955 // check code_attribute_length first 1956 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1957 1958 if (!need_verify && !DumpSharedSpaces) { 1959 return NULL; 1960 } 1961 return stackmap_table_start; 1962} 1963 1964const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1965 u2* const checked_exceptions_length, 1966 u4 method_attribute_length, 1967 TRAPS) { 1968 assert(cfs != NULL, "invariant"); 1969 assert(checked_exceptions_length != NULL, "invariant"); 1970 1971 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1972 *checked_exceptions_length = cfs->get_u2_fast(); 1973 const unsigned int size = 1974 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1975 const unsafe_u2* const checked_exceptions_start = cfs->current(); 1976 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1977 if (!_need_verify) { 1978 cfs->skip_u2_fast(size); 1979 } else { 1980 // Verify each value in the checked exception table 1981 u2 checked_exception; 1982 const u2 len = *checked_exceptions_length; 1983 cfs->guarantee_more(2 * len, CHECK_NULL); 1984 for (int i = 0; i < len; i++) { 1985 checked_exception = cfs->get_u2_fast(); 1986 check_property( 1987 valid_klass_reference_at(checked_exception), 1988 "Exception name has bad type at constant pool %u in class file %s", 1989 checked_exception, CHECK_NULL); 1990 } 1991 } 1992 // check exceptions attribute length 1993 if (_need_verify) { 1994 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1995 sizeof(u2) * size), 1996 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1997 } 1998 return checked_exceptions_start; 1999} 2000 2001void ClassFileParser::throwIllegalSignature(const char* type, 2002 const Symbol* name, 2003 const Symbol* sig, 2004 TRAPS) const { 2005 assert(name != NULL, "invariant"); 2006 assert(sig != NULL, "invariant"); 2007 2008 ResourceMark rm(THREAD); 2009 Exceptions::fthrow(THREAD_AND_LOCATION, 2010 vmSymbols::java_lang_ClassFormatError(), 2011 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 2012 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 2013} 2014 2015AnnotationCollector::ID 2016AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 2017 const Symbol* name) { 2018 const vmSymbols::SID sid = vmSymbols::find_sid(name); 2019 // Privileged code can use all annotations. Other code silently drops some. 2020 const bool privileged = loader_data->is_the_null_class_loader_data() || 2021 loader_data->is_platform_class_loader_data() || 2022 loader_data->is_anonymous(); 2023 switch (sid) { 2024 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): { 2025 if (_location != _in_method) break; // only allow for methods 2026 if (!privileged) break; // only allow in privileged code 2027 return _method_CallerSensitive; 2028 } 2029 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 2030 if (_location != _in_method) break; // only allow for methods 2031 if (!privileged) break; // only allow in privileged code 2032 return _method_ForceInline; 2033 } 2034 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 2035 if (_location != _in_method) break; // only allow for methods 2036 if (!privileged) break; // only allow in privileged code 2037 return _method_DontInline; 2038 } 2039 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 2040 if (_location != _in_method) break; // only allow for methods 2041 if (!privileged) break; // only allow in privileged code 2042 return _method_InjectedProfile; 2043 } 2044 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 2045 if (_location != _in_method) break; // only allow for methods 2046 if (!privileged) break; // only allow in privileged code 2047 return _method_LambdaForm_Compiled; 2048 } 2049 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 2050 if (_location != _in_method) break; // only allow for methods 2051 if (!privileged) break; // only allow in privileged code 2052 return _method_LambdaForm_Hidden; 2053 } 2054 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 2055 if (_location != _in_method) break; // only allow for methods 2056 if (!privileged) break; // only allow in privileged code 2057 return _method_HotSpotIntrinsicCandidate; 2058 } 2059 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2060 if (_location != _in_field) break; // only allow for fields 2061 if (!privileged) break; // only allow in privileged code 2062 return _field_Stable; 2063 } 2064 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2065 if (_location != _in_field && _location != _in_class) { 2066 break; // only allow for fields and classes 2067 } 2068 if (!EnableContended || (RestrictContended && !privileged)) { 2069 break; // honor privileges 2070 } 2071 return _jdk_internal_vm_annotation_Contended; 2072 } 2073 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2074 if (_location != _in_method) break; // only allow for methods 2075 if (RestrictReservedStack && !privileged) break; // honor privileges 2076 return _jdk_internal_vm_annotation_ReservedStackAccess; 2077 } 2078 default: { 2079 break; 2080 } 2081 } 2082 return AnnotationCollector::_unknown; 2083} 2084 2085void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2086 if (is_contended()) 2087 f->set_contended_group(contended_group()); 2088 if (is_stable()) 2089 f->set_stable(true); 2090} 2091 2092ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2093 // If there's an error deallocate metadata for field annotations 2094 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2095 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2096} 2097 2098void MethodAnnotationCollector::apply_to(const methodHandle& m) { 2099 if (has_annotation(_method_CallerSensitive)) 2100 m->set_caller_sensitive(true); 2101 if (has_annotation(_method_ForceInline)) 2102 m->set_force_inline(true); 2103 if (has_annotation(_method_DontInline)) 2104 m->set_dont_inline(true); 2105 if (has_annotation(_method_InjectedProfile)) 2106 m->set_has_injected_profile(true); 2107 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2108 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2109 if (has_annotation(_method_LambdaForm_Hidden)) 2110 m->set_hidden(true); 2111 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2112 m->set_intrinsic_candidate(true); 2113 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2114 m->set_has_reserved_stack_access(true); 2115} 2116 2117void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2118 assert(ik != NULL, "invariant"); 2119 ik->set_is_contended(is_contended()); 2120} 2121 2122#define MAX_ARGS_SIZE 255 2123#define MAX_CODE_SIZE 65535 2124#define INITIAL_MAX_LVT_NUMBER 256 2125 2126/* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2127 * 2128 * Rules for LVT's and LVTT's are: 2129 * - There can be any number of LVT's and LVTT's. 2130 * - If there are n LVT's, it is the same as if there was just 2131 * one LVT containing all the entries from the n LVT's. 2132 * - There may be no more than one LVT entry per local variable. 2133 * Two LVT entries are 'equal' if these fields are the same: 2134 * start_pc, length, name, slot 2135 * - There may be no more than one LVTT entry per each LVT entry. 2136 * Each LVTT entry has to match some LVT entry. 2137 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2138 */ 2139void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2140 int lvt_cnt, 2141 u2* const localvariable_table_length, 2142 const unsafe_u2** const localvariable_table_start, 2143 int lvtt_cnt, 2144 u2* const localvariable_type_table_length, 2145 const unsafe_u2** const localvariable_type_table_start, 2146 TRAPS) { 2147 2148 ResourceMark rm(THREAD); 2149 2150 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2151 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2152 2153 LVT_HashTable* const table = new LVT_HashTable(); 2154 2155 // To fill LocalVariableTable in 2156 const Classfile_LVT_Element* cf_lvt; 2157 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2158 2159 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2160 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2161 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2162 copy_lvt_element(&cf_lvt[idx], lvt); 2163 // If no duplicates, add LVT elem in hashtable. 2164 if (table->put(*lvt, lvt) == false 2165 && _need_verify 2166 && _major_version >= JAVA_1_5_VERSION) { 2167 classfile_parse_error("Duplicated LocalVariableTable attribute " 2168 "entry for '%s' in class file %s", 2169 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2170 CHECK); 2171 } 2172 } 2173 } 2174 2175 // To merge LocalVariableTable and LocalVariableTypeTable 2176 const Classfile_LVT_Element* cf_lvtt; 2177 LocalVariableTableElement lvtt_elem; 2178 2179 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2180 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2181 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2182 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2183 LocalVariableTableElement** entry = table->get(lvtt_elem); 2184 if (entry == NULL) { 2185 if (_need_verify) { 2186 classfile_parse_error("LVTT entry for '%s' in class file %s " 2187 "does not match any LVT entry", 2188 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2189 CHECK); 2190 } 2191 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2192 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2193 "entry for '%s' in class file %s", 2194 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2195 CHECK); 2196 } else { 2197 // to add generic signatures into LocalVariableTable 2198 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2199 } 2200 } 2201 } 2202} 2203 2204 2205void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2206 const u1* runtime_visible_annotations, 2207 int runtime_visible_annotations_length, 2208 const u1* runtime_invisible_annotations, 2209 int runtime_invisible_annotations_length, 2210 const u1* runtime_visible_parameter_annotations, 2211 int runtime_visible_parameter_annotations_length, 2212 const u1* runtime_invisible_parameter_annotations, 2213 int runtime_invisible_parameter_annotations_length, 2214 const u1* runtime_visible_type_annotations, 2215 int runtime_visible_type_annotations_length, 2216 const u1* runtime_invisible_type_annotations, 2217 int runtime_invisible_type_annotations_length, 2218 const u1* annotation_default, 2219 int annotation_default_length, 2220 TRAPS) { 2221 2222 AnnotationArray* a; 2223 2224 if (runtime_visible_annotations_length + 2225 runtime_invisible_annotations_length > 0) { 2226 a = assemble_annotations(runtime_visible_annotations, 2227 runtime_visible_annotations_length, 2228 runtime_invisible_annotations, 2229 runtime_invisible_annotations_length, 2230 CHECK); 2231 cm->set_method_annotations(a); 2232 } 2233 2234 if (runtime_visible_parameter_annotations_length + 2235 runtime_invisible_parameter_annotations_length > 0) { 2236 a = assemble_annotations(runtime_visible_parameter_annotations, 2237 runtime_visible_parameter_annotations_length, 2238 runtime_invisible_parameter_annotations, 2239 runtime_invisible_parameter_annotations_length, 2240 CHECK); 2241 cm->set_parameter_annotations(a); 2242 } 2243 2244 if (annotation_default_length > 0) { 2245 a = assemble_annotations(annotation_default, 2246 annotation_default_length, 2247 NULL, 2248 0, 2249 CHECK); 2250 cm->set_default_annotations(a); 2251 } 2252 2253 if (runtime_visible_type_annotations_length + 2254 runtime_invisible_type_annotations_length > 0) { 2255 a = assemble_annotations(runtime_visible_type_annotations, 2256 runtime_visible_type_annotations_length, 2257 runtime_invisible_type_annotations, 2258 runtime_invisible_type_annotations_length, 2259 CHECK); 2260 cm->set_type_annotations(a); 2261 } 2262} 2263 2264 2265// Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2266// attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2267// Method* to save footprint, so we only know the size of the resulting Method* when the 2268// entire method attribute is parsed. 2269// 2270// The promoted_flags parameter is used to pass relevant access_flags 2271// from the method back up to the containing klass. These flag values 2272// are added to klass's access_flags. 2273 2274Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2275 bool is_interface, 2276 const ConstantPool* cp, 2277 AccessFlags* const promoted_flags, 2278 TRAPS) { 2279 assert(cfs != NULL, "invariant"); 2280 assert(cp != NULL, "invariant"); 2281 assert(promoted_flags != NULL, "invariant"); 2282 2283 ResourceMark rm(THREAD); 2284 // Parse fixed parts: 2285 // access_flags, name_index, descriptor_index, attributes_count 2286 cfs->guarantee_more(8, CHECK_NULL); 2287 2288 int flags = cfs->get_u2_fast(); 2289 const u2 name_index = cfs->get_u2_fast(); 2290 const int cp_size = cp->length(); 2291 check_property( 2292 valid_symbol_at(name_index), 2293 "Illegal constant pool index %u for method name in class file %s", 2294 name_index, CHECK_NULL); 2295 const Symbol* const name = cp->symbol_at(name_index); 2296 verify_legal_method_name(name, CHECK_NULL); 2297 2298 const u2 signature_index = cfs->get_u2_fast(); 2299 guarantee_property( 2300 valid_symbol_at(signature_index), 2301 "Illegal constant pool index %u for method signature in class file %s", 2302 signature_index, CHECK_NULL); 2303 const Symbol* const signature = cp->symbol_at(signature_index); 2304 2305 if (name == vmSymbols::class_initializer_name()) { 2306 // We ignore the other access flags for a valid class initializer. 2307 // (JVM Spec 2nd ed., chapter 4.6) 2308 if (_major_version < 51) { // backward compatibility 2309 flags = JVM_ACC_STATIC; 2310 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2311 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2312 } else { 2313 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2314 } 2315 } else { 2316 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2317 } 2318 2319 if (name == vmSymbols::object_initializer_name() && is_interface) { 2320 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2321 } 2322 2323 int args_size = -1; // only used when _need_verify is true 2324 if (_need_verify) { 2325 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2326 verify_legal_method_signature(name, signature, CHECK_NULL); 2327 if (args_size > MAX_ARGS_SIZE) { 2328 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2329 } 2330 } 2331 2332 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2333 2334 // Default values for code and exceptions attribute elements 2335 u2 max_stack = 0; 2336 u2 max_locals = 0; 2337 u4 code_length = 0; 2338 const u1* code_start = 0; 2339 u2 exception_table_length = 0; 2340 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements 2341 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2342 u2 checked_exceptions_length = 0; 2343 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements 2344 CompressedLineNumberWriteStream* linenumber_table = NULL; 2345 int linenumber_table_length = 0; 2346 int total_lvt_length = 0; 2347 u2 lvt_cnt = 0; 2348 u2 lvtt_cnt = 0; 2349 bool lvt_allocated = false; 2350 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2351 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2352 u2* localvariable_table_length = NULL; 2353 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes 2354 u2* localvariable_type_table_length = NULL; 2355 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes 2356 int method_parameters_length = -1; 2357 const u1* method_parameters_data = NULL; 2358 bool method_parameters_seen = false; 2359 bool parsed_code_attribute = false; 2360 bool parsed_checked_exceptions_attribute = false; 2361 bool parsed_stackmap_attribute = false; 2362 // stackmap attribute - JDK1.5 2363 const u1* stackmap_data = NULL; 2364 int stackmap_data_length = 0; 2365 u2 generic_signature_index = 0; 2366 MethodAnnotationCollector parsed_annotations; 2367 const u1* runtime_visible_annotations = NULL; 2368 int runtime_visible_annotations_length = 0; 2369 const u1* runtime_invisible_annotations = NULL; 2370 int runtime_invisible_annotations_length = 0; 2371 const u1* runtime_visible_parameter_annotations = NULL; 2372 int runtime_visible_parameter_annotations_length = 0; 2373 const u1* runtime_invisible_parameter_annotations = NULL; 2374 int runtime_invisible_parameter_annotations_length = 0; 2375 const u1* runtime_visible_type_annotations = NULL; 2376 int runtime_visible_type_annotations_length = 0; 2377 const u1* runtime_invisible_type_annotations = NULL; 2378 int runtime_invisible_type_annotations_length = 0; 2379 bool runtime_invisible_annotations_exists = false; 2380 bool runtime_invisible_type_annotations_exists = false; 2381 bool runtime_invisible_parameter_annotations_exists = false; 2382 const u1* annotation_default = NULL; 2383 int annotation_default_length = 0; 2384 2385 // Parse code and exceptions attribute 2386 u2 method_attributes_count = cfs->get_u2_fast(); 2387 while (method_attributes_count--) { 2388 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2389 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2390 const u4 method_attribute_length = cfs->get_u4_fast(); 2391 check_property( 2392 valid_symbol_at(method_attribute_name_index), 2393 "Invalid method attribute name index %u in class file %s", 2394 method_attribute_name_index, CHECK_NULL); 2395 2396 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2397 if (method_attribute_name == vmSymbols::tag_code()) { 2398 // Parse Code attribute 2399 if (_need_verify) { 2400 guarantee_property( 2401 !access_flags.is_native() && !access_flags.is_abstract(), 2402 "Code attribute in native or abstract methods in class file %s", 2403 CHECK_NULL); 2404 } 2405 if (parsed_code_attribute) { 2406 classfile_parse_error("Multiple Code attributes in class file %s", 2407 CHECK_NULL); 2408 } 2409 parsed_code_attribute = true; 2410 2411 // Stack size, locals size, and code size 2412 if (_major_version == 45 && _minor_version <= 2) { 2413 cfs->guarantee_more(4, CHECK_NULL); 2414 max_stack = cfs->get_u1_fast(); 2415 max_locals = cfs->get_u1_fast(); 2416 code_length = cfs->get_u2_fast(); 2417 } else { 2418 cfs->guarantee_more(8, CHECK_NULL); 2419 max_stack = cfs->get_u2_fast(); 2420 max_locals = cfs->get_u2_fast(); 2421 code_length = cfs->get_u4_fast(); 2422 } 2423 if (_need_verify) { 2424 guarantee_property(args_size <= max_locals, 2425 "Arguments can't fit into locals in class file %s", 2426 CHECK_NULL); 2427 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2428 "Invalid method Code length %u in class file %s", 2429 code_length, CHECK_NULL); 2430 } 2431 // Code pointer 2432 code_start = cfs->current(); 2433 assert(code_start != NULL, "null code start"); 2434 cfs->guarantee_more(code_length, CHECK_NULL); 2435 cfs->skip_u1_fast(code_length); 2436 2437 // Exception handler table 2438 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2439 exception_table_length = cfs->get_u2_fast(); 2440 if (exception_table_length > 0) { 2441 exception_table_start = parse_exception_table(cfs, 2442 code_length, 2443 exception_table_length, 2444 CHECK_NULL); 2445 } 2446 2447 // Parse additional attributes in code attribute 2448 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2449 u2 code_attributes_count = cfs->get_u2_fast(); 2450 2451 unsigned int calculated_attribute_length = 0; 2452 2453 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2454 calculated_attribute_length = 2455 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2456 } else { 2457 // max_stack, locals and length are smaller in pre-version 45.2 classes 2458 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2459 } 2460 calculated_attribute_length += 2461 code_length + 2462 sizeof(exception_table_length) + 2463 sizeof(code_attributes_count) + 2464 exception_table_length * 2465 ( sizeof(u2) + // start_pc 2466 sizeof(u2) + // end_pc 2467 sizeof(u2) + // handler_pc 2468 sizeof(u2) ); // catch_type_index 2469 2470 while (code_attributes_count--) { 2471 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2472 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2473 const u4 code_attribute_length = cfs->get_u4_fast(); 2474 calculated_attribute_length += code_attribute_length + 2475 sizeof(code_attribute_name_index) + 2476 sizeof(code_attribute_length); 2477 check_property(valid_symbol_at(code_attribute_name_index), 2478 "Invalid code attribute name index %u in class file %s", 2479 code_attribute_name_index, 2480 CHECK_NULL); 2481 if (LoadLineNumberTables && 2482 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2483 // Parse and compress line number table 2484 parse_linenumber_table(code_attribute_length, 2485 code_length, 2486 &linenumber_table, 2487 CHECK_NULL); 2488 2489 } else if (LoadLocalVariableTables && 2490 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2491 // Parse local variable table 2492 if (!lvt_allocated) { 2493 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2494 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2495 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2496 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER); 2497 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2498 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2499 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2500 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER); 2501 lvt_allocated = true; 2502 } 2503 if (lvt_cnt == max_lvt_cnt) { 2504 max_lvt_cnt <<= 1; 2505 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2506 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2507 } 2508 localvariable_table_start[lvt_cnt] = 2509 parse_localvariable_table(cfs, 2510 code_length, 2511 max_locals, 2512 code_attribute_length, 2513 &localvariable_table_length[lvt_cnt], 2514 false, // is not LVTT 2515 CHECK_NULL); 2516 total_lvt_length += localvariable_table_length[lvt_cnt]; 2517 lvt_cnt++; 2518 } else if (LoadLocalVariableTypeTables && 2519 _major_version >= JAVA_1_5_VERSION && 2520 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2521 if (!lvt_allocated) { 2522 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2523 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2524 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2525 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER); 2526 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2527 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2528 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2529 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER); 2530 lvt_allocated = true; 2531 } 2532 // Parse local variable type table 2533 if (lvtt_cnt == max_lvtt_cnt) { 2534 max_lvtt_cnt <<= 1; 2535 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2536 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2537 } 2538 localvariable_type_table_start[lvtt_cnt] = 2539 parse_localvariable_table(cfs, 2540 code_length, 2541 max_locals, 2542 code_attribute_length, 2543 &localvariable_type_table_length[lvtt_cnt], 2544 true, // is LVTT 2545 CHECK_NULL); 2546 lvtt_cnt++; 2547 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2548 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2549 // Stack map is only needed by the new verifier in JDK1.5. 2550 if (parsed_stackmap_attribute) { 2551 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2552 } 2553 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2554 stackmap_data_length = code_attribute_length; 2555 parsed_stackmap_attribute = true; 2556 } else { 2557 // Skip unknown attributes 2558 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2559 } 2560 } 2561 // check method attribute length 2562 if (_need_verify) { 2563 guarantee_property(method_attribute_length == calculated_attribute_length, 2564 "Code segment has wrong length in class file %s", 2565 CHECK_NULL); 2566 } 2567 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2568 // Parse Exceptions attribute 2569 if (parsed_checked_exceptions_attribute) { 2570 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2571 CHECK_NULL); 2572 } 2573 parsed_checked_exceptions_attribute = true; 2574 checked_exceptions_start = 2575 parse_checked_exceptions(cfs, 2576 &checked_exceptions_length, 2577 method_attribute_length, 2578 CHECK_NULL); 2579 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2580 // reject multiple method parameters 2581 if (method_parameters_seen) { 2582 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2583 CHECK_NULL); 2584 } 2585 method_parameters_seen = true; 2586 method_parameters_length = cfs->get_u1_fast(); 2587 const u2 real_length = (method_parameters_length * 4u) + 1u; 2588 if (method_attribute_length != real_length) { 2589 classfile_parse_error( 2590 "Invalid MethodParameters method attribute length %u in class file", 2591 method_attribute_length, CHECK_NULL); 2592 } 2593 method_parameters_data = cfs->current(); 2594 cfs->skip_u2_fast(method_parameters_length); 2595 cfs->skip_u2_fast(method_parameters_length); 2596 // ignore this attribute if it cannot be reflected 2597 if (!SystemDictionary::Parameter_klass_loaded()) 2598 method_parameters_length = -1; 2599 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2600 if (method_attribute_length != 0) { 2601 classfile_parse_error( 2602 "Invalid Synthetic method attribute length %u in class file %s", 2603 method_attribute_length, CHECK_NULL); 2604 } 2605 // Should we check that there hasn't already been a synthetic attribute? 2606 access_flags.set_is_synthetic(); 2607 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2608 if (method_attribute_length != 0) { 2609 classfile_parse_error( 2610 "Invalid Deprecated method attribute length %u in class file %s", 2611 method_attribute_length, CHECK_NULL); 2612 } 2613 } else if (_major_version >= JAVA_1_5_VERSION) { 2614 if (method_attribute_name == vmSymbols::tag_signature()) { 2615 if (generic_signature_index != 0) { 2616 classfile_parse_error( 2617 "Multiple Signature attributes for method in class file %s", 2618 CHECK_NULL); 2619 } 2620 if (method_attribute_length != 2) { 2621 classfile_parse_error( 2622 "Invalid Signature attribute length %u in class file %s", 2623 method_attribute_length, CHECK_NULL); 2624 } 2625 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2626 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2627 if (runtime_visible_annotations != NULL) { 2628 classfile_parse_error( 2629 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2630 CHECK_NULL); 2631 } 2632 runtime_visible_annotations_length = method_attribute_length; 2633 runtime_visible_annotations = cfs->current(); 2634 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2635 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL); 2636 parse_annotations(cp, 2637 runtime_visible_annotations, 2638 runtime_visible_annotations_length, 2639 &parsed_annotations, 2640 _loader_data, 2641 CHECK_NULL); 2642 cfs->skip_u1_fast(runtime_visible_annotations_length); 2643 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2644 if (runtime_invisible_annotations_exists) { 2645 classfile_parse_error( 2646 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2647 CHECK_NULL); 2648 } 2649 runtime_invisible_annotations_exists = true; 2650 if (PreserveAllAnnotations) { 2651 runtime_invisible_annotations_length = method_attribute_length; 2652 runtime_invisible_annotations = cfs->current(); 2653 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2654 } 2655 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2656 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2657 if (runtime_visible_parameter_annotations != NULL) { 2658 classfile_parse_error( 2659 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2660 CHECK_NULL); 2661 } 2662 runtime_visible_parameter_annotations_length = method_attribute_length; 2663 runtime_visible_parameter_annotations = cfs->current(); 2664 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2665 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2666 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2667 if (runtime_invisible_parameter_annotations_exists) { 2668 classfile_parse_error( 2669 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2670 CHECK_NULL); 2671 } 2672 runtime_invisible_parameter_annotations_exists = true; 2673 if (PreserveAllAnnotations) { 2674 runtime_invisible_parameter_annotations_length = method_attribute_length; 2675 runtime_invisible_parameter_annotations = cfs->current(); 2676 assert(runtime_invisible_parameter_annotations != NULL, 2677 "null invisible parameter annotations"); 2678 } 2679 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2680 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2681 if (annotation_default != NULL) { 2682 classfile_parse_error( 2683 "Multiple AnnotationDefault attributes for method in class file %s", 2684 CHECK_NULL); 2685 } 2686 annotation_default_length = method_attribute_length; 2687 annotation_default = cfs->current(); 2688 assert(annotation_default != NULL, "null annotation default"); 2689 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2690 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2691 if (runtime_visible_type_annotations != NULL) { 2692 classfile_parse_error( 2693 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2694 CHECK_NULL); 2695 } 2696 runtime_visible_type_annotations_length = method_attribute_length; 2697 runtime_visible_type_annotations = cfs->current(); 2698 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2699 // No need for the VM to parse Type annotations 2700 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2701 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2702 if (runtime_invisible_type_annotations_exists) { 2703 classfile_parse_error( 2704 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2705 CHECK_NULL); 2706 } else { 2707 runtime_invisible_type_annotations_exists = true; 2708 } 2709 if (PreserveAllAnnotations) { 2710 runtime_invisible_type_annotations_length = method_attribute_length; 2711 runtime_invisible_type_annotations = cfs->current(); 2712 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2713 } 2714 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2715 } else { 2716 // Skip unknown attributes 2717 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2718 } 2719 } else { 2720 // Skip unknown attributes 2721 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2722 } 2723 } 2724 2725 if (linenumber_table != NULL) { 2726 linenumber_table->write_terminator(); 2727 linenumber_table_length = linenumber_table->position(); 2728 } 2729 2730 // Make sure there's at least one Code attribute in non-native/non-abstract method 2731 if (_need_verify) { 2732 guarantee_property(access_flags.is_native() || 2733 access_flags.is_abstract() || 2734 parsed_code_attribute, 2735 "Absent Code attribute in method that is not native or abstract in class file %s", 2736 CHECK_NULL); 2737 } 2738 2739 // All sizing information for a Method* is finally available, now create it 2740 InlineTableSizes sizes( 2741 total_lvt_length, 2742 linenumber_table_length, 2743 exception_table_length, 2744 checked_exceptions_length, 2745 method_parameters_length, 2746 generic_signature_index, 2747 runtime_visible_annotations_length + 2748 runtime_invisible_annotations_length, 2749 runtime_visible_parameter_annotations_length + 2750 runtime_invisible_parameter_annotations_length, 2751 runtime_visible_type_annotations_length + 2752 runtime_invisible_type_annotations_length, 2753 annotation_default_length, 2754 0); 2755 2756 Method* const m = Method::allocate(_loader_data, 2757 code_length, 2758 access_flags, 2759 &sizes, 2760 ConstMethod::NORMAL, 2761 CHECK_NULL); 2762 2763 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2764 2765 // Fill in information from fixed part (access_flags already set) 2766 m->set_constants(_cp); 2767 m->set_name_index(name_index); 2768 m->set_signature_index(signature_index); 2769 2770 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2771 m->constMethod()->set_result_type(rtf.type()); 2772 2773 if (args_size >= 0) { 2774 m->set_size_of_parameters(args_size); 2775 } else { 2776 m->compute_size_of_parameters(THREAD); 2777 } 2778#ifdef ASSERT 2779 if (args_size >= 0) { 2780 m->compute_size_of_parameters(THREAD); 2781 assert(args_size == m->size_of_parameters(), ""); 2782 } 2783#endif 2784 2785 // Fill in code attribute information 2786 m->set_max_stack(max_stack); 2787 m->set_max_locals(max_locals); 2788 if (stackmap_data != NULL) { 2789 m->constMethod()->copy_stackmap_data(_loader_data, 2790 (u1*)stackmap_data, 2791 stackmap_data_length, 2792 CHECK_NULL); 2793 } 2794 2795 // Copy byte codes 2796 m->set_code((u1*)code_start); 2797 2798 // Copy line number table 2799 if (linenumber_table != NULL) { 2800 memcpy(m->compressed_linenumber_table(), 2801 linenumber_table->buffer(), 2802 linenumber_table_length); 2803 } 2804 2805 // Copy exception table 2806 if (exception_table_length > 0) { 2807 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start, 2808 m->exception_table_start(), 2809 exception_table_length * sizeof(ExceptionTableElement), 2810 sizeof(u2)); 2811 } 2812 2813 // Copy method parameters 2814 if (method_parameters_length > 0) { 2815 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2816 for (int i = 0; i < method_parameters_length; i++) { 2817 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2818 method_parameters_data += 2; 2819 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2820 method_parameters_data += 2; 2821 } 2822 } 2823 2824 // Copy checked exceptions 2825 if (checked_exceptions_length > 0) { 2826 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start, 2827 m->checked_exceptions_start(), 2828 checked_exceptions_length * sizeof(CheckedExceptionElement), 2829 sizeof(u2)); 2830 } 2831 2832 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2833 if (total_lvt_length > 0) { 2834 promoted_flags->set_has_localvariable_table(); 2835 copy_localvariable_table(m->constMethod(), 2836 lvt_cnt, 2837 localvariable_table_length, 2838 localvariable_table_start, 2839 lvtt_cnt, 2840 localvariable_type_table_length, 2841 localvariable_type_table_start, 2842 CHECK_NULL); 2843 } 2844 2845 if (parsed_annotations.has_any_annotations()) 2846 parsed_annotations.apply_to(m); 2847 2848 // Copy annotations 2849 copy_method_annotations(m->constMethod(), 2850 runtime_visible_annotations, 2851 runtime_visible_annotations_length, 2852 runtime_invisible_annotations, 2853 runtime_invisible_annotations_length, 2854 runtime_visible_parameter_annotations, 2855 runtime_visible_parameter_annotations_length, 2856 runtime_invisible_parameter_annotations, 2857 runtime_invisible_parameter_annotations_length, 2858 runtime_visible_type_annotations, 2859 runtime_visible_type_annotations_length, 2860 runtime_invisible_type_annotations, 2861 runtime_invisible_type_annotations_length, 2862 annotation_default, 2863 annotation_default_length, 2864 CHECK_NULL); 2865 2866 if (name == vmSymbols::finalize_method_name() && 2867 signature == vmSymbols::void_method_signature()) { 2868 if (m->is_empty_method()) { 2869 _has_empty_finalizer = true; 2870 } else { 2871 _has_finalizer = true; 2872 } 2873 } 2874 if (name == vmSymbols::object_initializer_name() && 2875 signature == vmSymbols::void_method_signature() && 2876 m->is_vanilla_constructor()) { 2877 _has_vanilla_constructor = true; 2878 } 2879 2880 NOT_PRODUCT(m->verify()); 2881 return m; 2882} 2883 2884 2885// The promoted_flags parameter is used to pass relevant access_flags 2886// from the methods back up to the containing klass. These flag values 2887// are added to klass's access_flags. 2888// Side-effects: populates the _methods field in the parser 2889void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2890 bool is_interface, 2891 AccessFlags* promoted_flags, 2892 bool* has_final_method, 2893 bool* declares_nonstatic_concrete_methods, 2894 TRAPS) { 2895 assert(cfs != NULL, "invariant"); 2896 assert(promoted_flags != NULL, "invariant"); 2897 assert(has_final_method != NULL, "invariant"); 2898 assert(declares_nonstatic_concrete_methods != NULL, "invariant"); 2899 2900 assert(NULL == _methods, "invariant"); 2901 2902 cfs->guarantee_more(2, CHECK); // length 2903 const u2 length = cfs->get_u2_fast(); 2904 if (length == 0) { 2905 _methods = Universe::the_empty_method_array(); 2906 } else { 2907 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2908 length, 2909 NULL, 2910 CHECK); 2911 2912 for (int index = 0; index < length; index++) { 2913 Method* method = parse_method(cfs, 2914 is_interface, 2915 _cp, 2916 promoted_flags, 2917 CHECK); 2918 2919 if (method->is_final()) { 2920 *has_final_method = true; 2921 } 2922 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags 2923 // used for interface initialization, and default method inheritance analysis 2924 if (is_interface && !(*declares_nonstatic_concrete_methods) 2925 && !method->is_abstract() && !method->is_static()) { 2926 *declares_nonstatic_concrete_methods = true; 2927 } 2928 _methods->at_put(index, method); 2929 } 2930 2931 if (_need_verify && length > 1) { 2932 // Check duplicated methods 2933 ResourceMark rm(THREAD); 2934 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2935 THREAD, NameSigHash*, HASH_ROW_SIZE); 2936 initialize_hashtable(names_and_sigs); 2937 bool dup = false; 2938 const Symbol* name = NULL; 2939 const Symbol* sig = NULL; 2940 { 2941 debug_only(NoSafepointVerifier nsv;) 2942 for (int i = 0; i < length; i++) { 2943 const Method* const m = _methods->at(i); 2944 name = m->name(); 2945 sig = m->signature(); 2946 // If no duplicates, add name/signature in hashtable names_and_sigs. 2947 if (!put_after_lookup(name, sig, names_and_sigs)) { 2948 dup = true; 2949 break; 2950 } 2951 } 2952 } 2953 if (dup) { 2954 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s", 2955 name->as_C_string(), sig->as_klass_external_name(), CHECK); 2956 } 2957 } 2958 } 2959} 2960 2961static const intArray* sort_methods(Array<Method*>* methods) { 2962 const int length = methods->length(); 2963 // If JVMTI original method ordering or sharing is enabled we have to 2964 // remember the original class file ordering. 2965 // We temporarily use the vtable_index field in the Method* to store the 2966 // class file index, so we can read in after calling qsort. 2967 // Put the method ordering in the shared archive. 2968 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2969 for (int index = 0; index < length; index++) { 2970 Method* const m = methods->at(index); 2971 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2972 m->set_vtable_index(index); 2973 } 2974 } 2975 // Sort method array by ascending method name (for faster lookups & vtable construction) 2976 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2977 Method::sort_methods(methods); 2978 2979 intArray* method_ordering = NULL; 2980 // If JVMTI original method ordering or sharing is enabled construct int 2981 // array remembering the original ordering 2982 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2983 method_ordering = new intArray(length, length, -1); 2984 for (int index = 0; index < length; index++) { 2985 Method* const m = methods->at(index); 2986 const int old_index = m->vtable_index(); 2987 assert(old_index >= 0 && old_index < length, "invalid method index"); 2988 method_ordering->at_put(index, old_index); 2989 m->set_vtable_index(Method::invalid_vtable_index); 2990 } 2991 } 2992 return method_ordering; 2993} 2994 2995// Parse generic_signature attribute for methods and fields 2996u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 2997 TRAPS) { 2998 assert(cfs != NULL, "invariant"); 2999 3000 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 3001 const u2 generic_signature_index = cfs->get_u2_fast(); 3002 check_property( 3003 valid_symbol_at(generic_signature_index), 3004 "Invalid Signature attribute at constant pool index %u in class file %s", 3005 generic_signature_index, CHECK_0); 3006 return generic_signature_index; 3007} 3008 3009void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 3010 TRAPS) { 3011 3012 assert(cfs != NULL, "invariant"); 3013 3014 cfs->guarantee_more(2, CHECK); // sourcefile_index 3015 const u2 sourcefile_index = cfs->get_u2_fast(); 3016 check_property( 3017 valid_symbol_at(sourcefile_index), 3018 "Invalid SourceFile attribute at constant pool index %u in class file %s", 3019 sourcefile_index, CHECK); 3020 set_class_sourcefile_index(sourcefile_index); 3021} 3022 3023void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 3024 int length, 3025 TRAPS) { 3026 assert(cfs != NULL, "invariant"); 3027 3028 const u1* const sde_buffer = cfs->current(); 3029 assert(sde_buffer != NULL, "null sde buffer"); 3030 3031 // Don't bother storing it if there is no way to retrieve it 3032 if (JvmtiExport::can_get_source_debug_extension()) { 3033 assert((length+1) > length, "Overflow checking"); 3034 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 3035 for (int i = 0; i < length; i++) { 3036 sde[i] = sde_buffer[i]; 3037 } 3038 sde[length] = '\0'; 3039 set_class_sde_buffer((const char*)sde, length); 3040 } 3041 // Got utf8 string, set stream position forward 3042 cfs->skip_u1(length, CHECK); 3043} 3044 3045 3046// Inner classes can be static, private or protected (classic VM does this) 3047#define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 3048 JVM_ACC_PRIVATE | \ 3049 JVM_ACC_PROTECTED | \ 3050 JVM_ACC_STATIC \ 3051 ) 3052 3053// Return number of classes in the inner classes attribute table 3054u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 3055 const u1* const inner_classes_attribute_start, 3056 bool parsed_enclosingmethod_attribute, 3057 u2 enclosing_method_class_index, 3058 u2 enclosing_method_method_index, 3059 TRAPS) { 3060 const u1* const current_mark = cfs->current(); 3061 u2 length = 0; 3062 if (inner_classes_attribute_start != NULL) { 3063 cfs->set_current(inner_classes_attribute_start); 3064 cfs->guarantee_more(2, CHECK_0); // length 3065 length = cfs->get_u2_fast(); 3066 } 3067 3068 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3069 // method data: 3070 // [inner_class_info_index, 3071 // outer_class_info_index, 3072 // inner_name_index, 3073 // inner_class_access_flags, 3074 // ... 3075 // enclosing_method_class_index, 3076 // enclosing_method_method_index] 3077 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3078 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3079 _inner_classes = inner_classes; 3080 3081 int index = 0; 3082 const int cp_size = _cp->length(); 3083 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3084 for (int n = 0; n < length; n++) { 3085 // Inner class index 3086 const u2 inner_class_info_index = cfs->get_u2_fast(); 3087 check_property( 3088 valid_klass_reference_at(inner_class_info_index), 3089 "inner_class_info_index %u has bad constant type in class file %s", 3090 inner_class_info_index, CHECK_0); 3091 // Outer class index 3092 const u2 outer_class_info_index = cfs->get_u2_fast(); 3093 check_property( 3094 outer_class_info_index == 0 || 3095 valid_klass_reference_at(outer_class_info_index), 3096 "outer_class_info_index %u has bad constant type in class file %s", 3097 outer_class_info_index, CHECK_0); 3098 // Inner class name 3099 const u2 inner_name_index = cfs->get_u2_fast(); 3100 check_property( 3101 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3102 "inner_name_index %u has bad constant type in class file %s", 3103 inner_name_index, CHECK_0); 3104 if (_need_verify) { 3105 guarantee_property(inner_class_info_index != outer_class_info_index, 3106 "Class is both outer and inner class in class file %s", CHECK_0); 3107 } 3108 // Access flags 3109 jint flags; 3110 // JVM_ACC_MODULE is defined in JDK-9 and later. 3111 if (_major_version >= JAVA_9_VERSION) { 3112 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE); 3113 } else { 3114 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3115 } 3116 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3117 // Set abstract bit for old class files for backward compatibility 3118 flags |= JVM_ACC_ABSTRACT; 3119 } 3120 verify_legal_class_modifiers(flags, CHECK_0); 3121 AccessFlags inner_access_flags(flags); 3122 3123 inner_classes->at_put(index++, inner_class_info_index); 3124 inner_classes->at_put(index++, outer_class_info_index); 3125 inner_classes->at_put(index++, inner_name_index); 3126 inner_classes->at_put(index++, inner_access_flags.as_short()); 3127 } 3128 3129 // 4347400: make sure there's no duplicate entry in the classes array 3130 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3131 for(int i = 0; i < length * 4; i += 4) { 3132 for(int j = i + 4; j < length * 4; j += 4) { 3133 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3134 inner_classes->at(i+1) != inner_classes->at(j+1) || 3135 inner_classes->at(i+2) != inner_classes->at(j+2) || 3136 inner_classes->at(i+3) != inner_classes->at(j+3)), 3137 "Duplicate entry in InnerClasses in class file %s", 3138 CHECK_0); 3139 } 3140 } 3141 } 3142 3143 // Set EnclosingMethod class and method indexes. 3144 if (parsed_enclosingmethod_attribute) { 3145 inner_classes->at_put(index++, enclosing_method_class_index); 3146 inner_classes->at_put(index++, enclosing_method_method_index); 3147 } 3148 assert(index == size, "wrong size"); 3149 3150 // Restore buffer's current position. 3151 cfs->set_current(current_mark); 3152 3153 return length; 3154} 3155 3156void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3157 set_class_synthetic_flag(true); 3158} 3159 3160void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3161 assert(cfs != NULL, "invariant"); 3162 3163 const u2 signature_index = cfs->get_u2(CHECK); 3164 check_property( 3165 valid_symbol_at(signature_index), 3166 "Invalid constant pool index %u in Signature attribute in class file %s", 3167 signature_index, CHECK); 3168 set_class_generic_signature_index(signature_index); 3169} 3170 3171void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3172 ConstantPool* cp, 3173 u4 attribute_byte_length, 3174 TRAPS) { 3175 assert(cfs != NULL, "invariant"); 3176 assert(cp != NULL, "invariant"); 3177 3178 const u1* const current_start = cfs->current(); 3179 3180 guarantee_property(attribute_byte_length >= sizeof(u2), 3181 "Invalid BootstrapMethods attribute length %u in class file %s", 3182 attribute_byte_length, 3183 CHECK); 3184 3185 cfs->guarantee_more(attribute_byte_length, CHECK); 3186 3187 const int attribute_array_length = cfs->get_u2_fast(); 3188 3189 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3190 "Short length on BootstrapMethods in class file %s", 3191 CHECK); 3192 3193 3194 // The attribute contains a counted array of counted tuples of shorts, 3195 // represending bootstrap specifiers: 3196 // length*{bootstrap_method_index, argument_count*{argument_index}} 3197 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3198 // operand_count = number of shorts in attr, except for leading length 3199 3200 // The attribute is copied into a short[] array. 3201 // The array begins with a series of short[2] pairs, one for each tuple. 3202 const int index_size = (attribute_array_length * 2); 3203 3204 Array<u2>* const operands = 3205 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3206 3207 // Eagerly assign operands so they will be deallocated with the constant 3208 // pool if there is an error. 3209 cp->set_operands(operands); 3210 3211 int operand_fill_index = index_size; 3212 const int cp_size = cp->length(); 3213 3214 for (int n = 0; n < attribute_array_length; n++) { 3215 // Store a 32-bit offset into the header of the operand array. 3216 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3217 3218 // Read a bootstrap specifier. 3219 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3220 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3221 const u2 argument_count = cfs->get_u2_fast(); 3222 check_property( 3223 valid_cp_range(bootstrap_method_index, cp_size) && 3224 cp->tag_at(bootstrap_method_index).is_method_handle(), 3225 "bootstrap_method_index %u has bad constant type in class file %s", 3226 bootstrap_method_index, 3227 CHECK); 3228 3229 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3230 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3231 CHECK); 3232 3233 operands->at_put(operand_fill_index++, bootstrap_method_index); 3234 operands->at_put(operand_fill_index++, argument_count); 3235 3236 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3237 for (int j = 0; j < argument_count; j++) { 3238 const u2 argument_index = cfs->get_u2_fast(); 3239 check_property( 3240 valid_cp_range(argument_index, cp_size) && 3241 cp->tag_at(argument_index).is_loadable_constant(), 3242 "argument_index %u has bad constant type in class file %s", 3243 argument_index, 3244 CHECK); 3245 operands->at_put(operand_fill_index++, argument_index); 3246 } 3247 } 3248 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3249 "Bad length on BootstrapMethods in class file %s", 3250 CHECK); 3251} 3252 3253void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3254 ConstantPool* cp, 3255 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3256 TRAPS) { 3257 assert(cfs != NULL, "invariant"); 3258 assert(cp != NULL, "invariant"); 3259 assert(parsed_annotations != NULL, "invariant"); 3260 3261 // Set inner classes attribute to default sentinel 3262 _inner_classes = Universe::the_empty_short_array(); 3263 cfs->guarantee_more(2, CHECK); // attributes_count 3264 u2 attributes_count = cfs->get_u2_fast(); 3265 bool parsed_sourcefile_attribute = false; 3266 bool parsed_innerclasses_attribute = false; 3267 bool parsed_enclosingmethod_attribute = false; 3268 bool parsed_bootstrap_methods_attribute = false; 3269 const u1* runtime_visible_annotations = NULL; 3270 int runtime_visible_annotations_length = 0; 3271 const u1* runtime_invisible_annotations = NULL; 3272 int runtime_invisible_annotations_length = 0; 3273 const u1* runtime_visible_type_annotations = NULL; 3274 int runtime_visible_type_annotations_length = 0; 3275 const u1* runtime_invisible_type_annotations = NULL; 3276 int runtime_invisible_type_annotations_length = 0; 3277 bool runtime_invisible_type_annotations_exists = false; 3278 bool runtime_invisible_annotations_exists = false; 3279 bool parsed_source_debug_ext_annotations_exist = false; 3280 const u1* inner_classes_attribute_start = NULL; 3281 u4 inner_classes_attribute_length = 0; 3282 u2 enclosing_method_class_index = 0; 3283 u2 enclosing_method_method_index = 0; 3284 // Iterate over attributes 3285 while (attributes_count--) { 3286 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3287 const u2 attribute_name_index = cfs->get_u2_fast(); 3288 const u4 attribute_length = cfs->get_u4_fast(); 3289 check_property( 3290 valid_symbol_at(attribute_name_index), 3291 "Attribute name has bad constant pool index %u in class file %s", 3292 attribute_name_index, CHECK); 3293 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3294 if (tag == vmSymbols::tag_source_file()) { 3295 // Check for SourceFile tag 3296 if (_need_verify) { 3297 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3298 } 3299 if (parsed_sourcefile_attribute) { 3300 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3301 } else { 3302 parsed_sourcefile_attribute = true; 3303 } 3304 parse_classfile_sourcefile_attribute(cfs, CHECK); 3305 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3306 // Check for SourceDebugExtension tag 3307 if (parsed_source_debug_ext_annotations_exist) { 3308 classfile_parse_error( 3309 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3310 } 3311 parsed_source_debug_ext_annotations_exist = true; 3312 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3313 } else if (tag == vmSymbols::tag_inner_classes()) { 3314 // Check for InnerClasses tag 3315 if (parsed_innerclasses_attribute) { 3316 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3317 } else { 3318 parsed_innerclasses_attribute = true; 3319 } 3320 inner_classes_attribute_start = cfs->current(); 3321 inner_classes_attribute_length = attribute_length; 3322 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3323 } else if (tag == vmSymbols::tag_synthetic()) { 3324 // Check for Synthetic tag 3325 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3326 if (attribute_length != 0) { 3327 classfile_parse_error( 3328 "Invalid Synthetic classfile attribute length %u in class file %s", 3329 attribute_length, CHECK); 3330 } 3331 parse_classfile_synthetic_attribute(CHECK); 3332 } else if (tag == vmSymbols::tag_deprecated()) { 3333 // Check for Deprecatd tag - 4276120 3334 if (attribute_length != 0) { 3335 classfile_parse_error( 3336 "Invalid Deprecated classfile attribute length %u in class file %s", 3337 attribute_length, CHECK); 3338 } 3339 } else if (_major_version >= JAVA_1_5_VERSION) { 3340 if (tag == vmSymbols::tag_signature()) { 3341 if (_generic_signature_index != 0) { 3342 classfile_parse_error( 3343 "Multiple Signature attributes in class file %s", CHECK); 3344 } 3345 if (attribute_length != 2) { 3346 classfile_parse_error( 3347 "Wrong Signature attribute length %u in class file %s", 3348 attribute_length, CHECK); 3349 } 3350 parse_classfile_signature_attribute(cfs, CHECK); 3351 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3352 if (runtime_visible_annotations != NULL) { 3353 classfile_parse_error( 3354 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3355 } 3356 runtime_visible_annotations_length = attribute_length; 3357 runtime_visible_annotations = cfs->current(); 3358 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3359 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 3360 parse_annotations(cp, 3361 runtime_visible_annotations, 3362 runtime_visible_annotations_length, 3363 parsed_annotations, 3364 _loader_data, 3365 CHECK); 3366 cfs->skip_u1_fast(runtime_visible_annotations_length); 3367 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3368 if (runtime_invisible_annotations_exists) { 3369 classfile_parse_error( 3370 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3371 } 3372 runtime_invisible_annotations_exists = true; 3373 if (PreserveAllAnnotations) { 3374 runtime_invisible_annotations_length = attribute_length; 3375 runtime_invisible_annotations = cfs->current(); 3376 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3377 } 3378 cfs->skip_u1(attribute_length, CHECK); 3379 } else if (tag == vmSymbols::tag_enclosing_method()) { 3380 if (parsed_enclosingmethod_attribute) { 3381 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3382 } else { 3383 parsed_enclosingmethod_attribute = true; 3384 } 3385 guarantee_property(attribute_length == 4, 3386 "Wrong EnclosingMethod attribute length %u in class file %s", 3387 attribute_length, CHECK); 3388 cfs->guarantee_more(4, CHECK); // class_index, method_index 3389 enclosing_method_class_index = cfs->get_u2_fast(); 3390 enclosing_method_method_index = cfs->get_u2_fast(); 3391 if (enclosing_method_class_index == 0) { 3392 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3393 } 3394 // Validate the constant pool indices and types 3395 check_property(valid_klass_reference_at(enclosing_method_class_index), 3396 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3397 if (enclosing_method_method_index != 0 && 3398 (!cp->is_within_bounds(enclosing_method_method_index) || 3399 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3400 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3401 } 3402 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3403 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3404 if (parsed_bootstrap_methods_attribute) { 3405 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3406 } 3407 parsed_bootstrap_methods_attribute = true; 3408 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3409 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3410 if (runtime_visible_type_annotations != NULL) { 3411 classfile_parse_error( 3412 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3413 } 3414 runtime_visible_type_annotations_length = attribute_length; 3415 runtime_visible_type_annotations = cfs->current(); 3416 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3417 // No need for the VM to parse Type annotations 3418 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3419 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3420 if (runtime_invisible_type_annotations_exists) { 3421 classfile_parse_error( 3422 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3423 } else { 3424 runtime_invisible_type_annotations_exists = true; 3425 } 3426 if (PreserveAllAnnotations) { 3427 runtime_invisible_type_annotations_length = attribute_length; 3428 runtime_invisible_type_annotations = cfs->current(); 3429 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3430 } 3431 cfs->skip_u1(attribute_length, CHECK); 3432 } else { 3433 // Unknown attribute 3434 cfs->skip_u1(attribute_length, CHECK); 3435 } 3436 } else { 3437 // Unknown attribute 3438 cfs->skip_u1(attribute_length, CHECK); 3439 } 3440 } 3441 _annotations = assemble_annotations(runtime_visible_annotations, 3442 runtime_visible_annotations_length, 3443 runtime_invisible_annotations, 3444 runtime_invisible_annotations_length, 3445 CHECK); 3446 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3447 runtime_visible_type_annotations_length, 3448 runtime_invisible_type_annotations, 3449 runtime_invisible_type_annotations_length, 3450 CHECK); 3451 3452 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3453 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3454 cfs, 3455 inner_classes_attribute_start, 3456 parsed_innerclasses_attribute, 3457 enclosing_method_class_index, 3458 enclosing_method_method_index, 3459 CHECK); 3460 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3461 guarantee_property( 3462 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3463 "Wrong InnerClasses attribute length in class file %s", CHECK); 3464 } 3465 } 3466 3467 if (_max_bootstrap_specifier_index >= 0) { 3468 guarantee_property(parsed_bootstrap_methods_attribute, 3469 "Missing BootstrapMethods attribute in class file %s", CHECK); 3470 } 3471} 3472 3473void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3474 assert(k != NULL, "invariant"); 3475 3476 if (_synthetic_flag) 3477 k->set_is_synthetic(); 3478 if (_sourcefile_index != 0) { 3479 k->set_source_file_name_index(_sourcefile_index); 3480 } 3481 if (_generic_signature_index != 0) { 3482 k->set_generic_signature_index(_generic_signature_index); 3483 } 3484 if (_sde_buffer != NULL) { 3485 k->set_source_debug_extension(_sde_buffer, _sde_length); 3486 } 3487} 3488 3489// Create the Annotations object that will 3490// hold the annotations array for the Klass. 3491void ClassFileParser::create_combined_annotations(TRAPS) { 3492 if (_annotations == NULL && 3493 _type_annotations == NULL && 3494 _fields_annotations == NULL && 3495 _fields_type_annotations == NULL) { 3496 // Don't create the Annotations object unnecessarily. 3497 return; 3498 } 3499 3500 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3501 annotations->set_class_annotations(_annotations); 3502 annotations->set_class_type_annotations(_type_annotations); 3503 annotations->set_fields_annotations(_fields_annotations); 3504 annotations->set_fields_type_annotations(_fields_type_annotations); 3505 3506 // This is the Annotations object that will be 3507 // assigned to InstanceKlass being constructed. 3508 _combined_annotations = annotations; 3509 3510 // The annotations arrays below has been transfered the 3511 // _combined_annotations so these fields can now be cleared. 3512 _annotations = NULL; 3513 _type_annotations = NULL; 3514 _fields_annotations = NULL; 3515 _fields_type_annotations = NULL; 3516} 3517 3518// Transfer ownership of metadata allocated to the InstanceKlass. 3519void ClassFileParser::apply_parsed_class_metadata( 3520 InstanceKlass* this_klass, 3521 int java_fields_count, TRAPS) { 3522 assert(this_klass != NULL, "invariant"); 3523 3524 _cp->set_pool_holder(this_klass); 3525 this_klass->set_constants(_cp); 3526 this_klass->set_fields(_fields, java_fields_count); 3527 this_klass->set_methods(_methods); 3528 this_klass->set_inner_classes(_inner_classes); 3529 this_klass->set_local_interfaces(_local_interfaces); 3530 this_klass->set_transitive_interfaces(_transitive_interfaces); 3531 this_klass->set_annotations(_combined_annotations); 3532 3533 // Clear out these fields so they don't get deallocated by the destructor 3534 clear_class_metadata(); 3535} 3536 3537AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3538 int runtime_visible_annotations_length, 3539 const u1* const runtime_invisible_annotations, 3540 int runtime_invisible_annotations_length, 3541 TRAPS) { 3542 AnnotationArray* annotations = NULL; 3543 if (runtime_visible_annotations != NULL || 3544 runtime_invisible_annotations != NULL) { 3545 annotations = MetadataFactory::new_array<u1>(_loader_data, 3546 runtime_visible_annotations_length + 3547 runtime_invisible_annotations_length, 3548 CHECK_(annotations)); 3549 if (runtime_visible_annotations != NULL) { 3550 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3551 annotations->at_put(i, runtime_visible_annotations[i]); 3552 } 3553 } 3554 if (runtime_invisible_annotations != NULL) { 3555 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3556 int append = runtime_visible_annotations_length+i; 3557 annotations->at_put(append, runtime_invisible_annotations[i]); 3558 } 3559 } 3560 } 3561 return annotations; 3562} 3563 3564const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3565 const int super_class_index, 3566 const bool need_verify, 3567 TRAPS) { 3568 assert(cp != NULL, "invariant"); 3569 const InstanceKlass* super_klass = NULL; 3570 3571 if (super_class_index == 0) { 3572 check_property(_class_name == vmSymbols::java_lang_Object(), 3573 "Invalid superclass index %u in class file %s", 3574 super_class_index, 3575 CHECK_NULL); 3576 } else { 3577 check_property(valid_klass_reference_at(super_class_index), 3578 "Invalid superclass index %u in class file %s", 3579 super_class_index, 3580 CHECK_NULL); 3581 // The class name should be legal because it is checked when parsing constant pool. 3582 // However, make sure it is not an array type. 3583 bool is_array = false; 3584 if (cp->tag_at(super_class_index).is_klass()) { 3585 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3586 if (need_verify) 3587 is_array = super_klass->is_array_klass(); 3588 } else if (need_verify) { 3589 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3590 } 3591 if (need_verify) { 3592 guarantee_property(!is_array, 3593 "Bad superclass name in class file %s", CHECK_NULL); 3594 } 3595 } 3596 return super_klass; 3597} 3598 3599static unsigned int compute_oop_map_count(const InstanceKlass* super, 3600 unsigned int nonstatic_oop_map_count, 3601 int first_nonstatic_oop_offset) { 3602 3603 unsigned int map_count = 3604 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3605 if (nonstatic_oop_map_count > 0) { 3606 // We have oops to add to map 3607 if (map_count == 0) { 3608 map_count = nonstatic_oop_map_count; 3609 } 3610 else { 3611 // Check whether we should add a new map block or whether the last one can 3612 // be extended 3613 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3614 const OopMapBlock* const last_map = first_map + map_count - 1; 3615 3616 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3617 if (next_offset == first_nonstatic_oop_offset) { 3618 // There is no gap bettwen superklass's last oop field and first 3619 // local oop field, merge maps. 3620 nonstatic_oop_map_count -= 1; 3621 } 3622 else { 3623 // Superklass didn't end with a oop field, add extra maps 3624 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3625 } 3626 map_count += nonstatic_oop_map_count; 3627 } 3628 } 3629 return map_count; 3630} 3631 3632#ifndef PRODUCT 3633static void print_field_layout(const Symbol* name, 3634 Array<u2>* fields, 3635 const constantPoolHandle& cp, 3636 int instance_size, 3637 int instance_fields_start, 3638 int instance_fields_end, 3639 int static_fields_end) { 3640 3641 assert(name != NULL, "invariant"); 3642 3643 tty->print("%s: field layout\n", name->as_klass_external_name()); 3644 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3645 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3646 if (!fs.access_flags().is_static()) { 3647 tty->print(" @%3d \"%s\" %s\n", 3648 fs.offset(), 3649 fs.name()->as_klass_external_name(), 3650 fs.signature()->as_klass_external_name()); 3651 } 3652 } 3653 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3654 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3655 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3656 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3657 if (fs.access_flags().is_static()) { 3658 tty->print(" @%3d \"%s\" %s\n", 3659 fs.offset(), 3660 fs.name()->as_klass_external_name(), 3661 fs.signature()->as_klass_external_name()); 3662 } 3663 } 3664 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3665 tty->print("\n"); 3666} 3667#endif 3668 3669// Values needed for oopmap and InstanceKlass creation 3670class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3671 public: 3672 int* nonstatic_oop_offsets; 3673 unsigned int* nonstatic_oop_counts; 3674 unsigned int nonstatic_oop_map_count; 3675 unsigned int total_oop_map_count; 3676 int instance_size; 3677 int nonstatic_field_size; 3678 int static_field_size; 3679 bool has_nonstatic_fields; 3680}; 3681 3682// Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3683void ClassFileParser::layout_fields(ConstantPool* cp, 3684 const FieldAllocationCount* fac, 3685 const ClassAnnotationCollector* parsed_annotations, 3686 FieldLayoutInfo* info, 3687 TRAPS) { 3688 3689 assert(cp != NULL, "invariant"); 3690 3691 // Field size and offset computation 3692 int nonstatic_field_size = _super_klass == NULL ? 0 : 3693 _super_klass->nonstatic_field_size(); 3694 3695 // Count the contended fields by type. 3696 // 3697 // We ignore static fields, because @Contended is not supported for them. 3698 // The layout code below will also ignore the static fields. 3699 int nonstatic_contended_count = 0; 3700 FieldAllocationCount fac_contended; 3701 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3702 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3703 if (fs.is_contended()) { 3704 fac_contended.count[atype]++; 3705 if (!fs.access_flags().is_static()) { 3706 nonstatic_contended_count++; 3707 } 3708 } 3709 } 3710 3711 3712 // Calculate the starting byte offsets 3713 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3714 int next_static_double_offset = next_static_oop_offset + 3715 ((fac->count[STATIC_OOP]) * heapOopSize); 3716 if ( fac->count[STATIC_DOUBLE] && 3717 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3718 Universe::field_type_should_be_aligned(T_LONG)) ) { 3719 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong); 3720 } 3721 3722 int next_static_word_offset = next_static_double_offset + 3723 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3724 int next_static_short_offset = next_static_word_offset + 3725 ((fac->count[STATIC_WORD]) * BytesPerInt); 3726 int next_static_byte_offset = next_static_short_offset + 3727 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3728 3729 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3730 nonstatic_field_size * heapOopSize; 3731 3732 int next_nonstatic_field_offset = nonstatic_fields_start; 3733 3734 const bool is_contended_class = parsed_annotations->is_contended(); 3735 3736 // Class is contended, pad before all the fields 3737 if (is_contended_class) { 3738 next_nonstatic_field_offset += ContendedPaddingWidth; 3739 } 3740 3741 // Compute the non-contended fields count. 3742 // The packing code below relies on these counts to determine if some field 3743 // can be squeezed into the alignment gap. Contended fields are obviously 3744 // exempt from that. 3745 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3746 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3747 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3748 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3749 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3750 3751 // Total non-static fields count, including every contended field 3752 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3753 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3754 fac->count[NONSTATIC_OOP]; 3755 3756 const bool super_has_nonstatic_fields = 3757 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3758 const bool has_nonstatic_fields = 3759 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3760 3761 3762 // Prepare list of oops for oop map generation. 3763 // 3764 // "offset" and "count" lists are describing the set of contiguous oop 3765 // regions. offset[i] is the start of the i-th region, which then has 3766 // count[i] oops following. Before we know how many regions are required, 3767 // we pessimistically allocate the maps to fit all the oops into the 3768 // distinct regions. 3769 // 3770 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3771 // to figure out if we still need to do this. 3772 unsigned int nonstatic_oop_map_count = 0; 3773 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3774 3775 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3776 THREAD, int, max_nonstatic_oop_maps); 3777 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3778 THREAD, unsigned int, max_nonstatic_oop_maps); 3779 3780 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3781 3782 bool compact_fields = CompactFields; 3783 int allocation_style = FieldsAllocationStyle; 3784 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3785 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3786 allocation_style = 1; // Optimistic 3787 } 3788 3789 // The next classes have predefined hard-coded fields offsets 3790 // (see in JavaClasses::compute_hard_coded_offsets()). 3791 // Use default fields allocation order for them. 3792 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3793 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3794 _class_name == vmSymbols::java_lang_Class() || 3795 _class_name == vmSymbols::java_lang_ClassLoader() || 3796 _class_name == vmSymbols::java_lang_ref_Reference() || 3797 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3798 _class_name == vmSymbols::java_lang_StackTraceElement() || 3799 _class_name == vmSymbols::java_lang_String() || 3800 _class_name == vmSymbols::java_lang_Throwable() || 3801 _class_name == vmSymbols::java_lang_Boolean() || 3802 _class_name == vmSymbols::java_lang_Character() || 3803 _class_name == vmSymbols::java_lang_Float() || 3804 _class_name == vmSymbols::java_lang_Double() || 3805 _class_name == vmSymbols::java_lang_Byte() || 3806 _class_name == vmSymbols::java_lang_Short() || 3807 _class_name == vmSymbols::java_lang_Integer() || 3808 _class_name == vmSymbols::java_lang_Long())) { 3809 allocation_style = 0; // Allocate oops first 3810 compact_fields = false; // Don't compact fields 3811 } 3812 3813 int next_nonstatic_oop_offset = 0; 3814 int next_nonstatic_double_offset = 0; 3815 3816 // Rearrange fields for a given allocation style 3817 if( allocation_style == 0 ) { 3818 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3819 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3820 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3821 (nonstatic_oop_count * heapOopSize); 3822 } else if( allocation_style == 1 ) { 3823 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3824 next_nonstatic_double_offset = next_nonstatic_field_offset; 3825 } else if( allocation_style == 2 ) { 3826 // Fields allocation: oops fields in super and sub classes are together. 3827 if( nonstatic_field_size > 0 && _super_klass != NULL && 3828 _super_klass->nonstatic_oop_map_size() > 0 ) { 3829 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3830 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3831 const OopMapBlock* const last_map = first_map + map_count - 1; 3832 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3833 if (next_offset == next_nonstatic_field_offset) { 3834 allocation_style = 0; // allocate oops first 3835 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3836 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3837 (nonstatic_oop_count * heapOopSize); 3838 } 3839 } 3840 if( allocation_style == 2 ) { 3841 allocation_style = 1; // allocate oops last 3842 next_nonstatic_double_offset = next_nonstatic_field_offset; 3843 } 3844 } else { 3845 ShouldNotReachHere(); 3846 } 3847 3848 int nonstatic_oop_space_count = 0; 3849 int nonstatic_word_space_count = 0; 3850 int nonstatic_short_space_count = 0; 3851 int nonstatic_byte_space_count = 0; 3852 int nonstatic_oop_space_offset = 0; 3853 int nonstatic_word_space_offset = 0; 3854 int nonstatic_short_space_offset = 0; 3855 int nonstatic_byte_space_offset = 0; 3856 3857 // Try to squeeze some of the fields into the gaps due to 3858 // long/double alignment. 3859 if (nonstatic_double_count > 0) { 3860 int offset = next_nonstatic_double_offset; 3861 next_nonstatic_double_offset = align_up(offset, BytesPerLong); 3862 if (compact_fields && offset != next_nonstatic_double_offset) { 3863 // Allocate available fields into the gap before double field. 3864 int length = next_nonstatic_double_offset - offset; 3865 assert(length == BytesPerInt, ""); 3866 nonstatic_word_space_offset = offset; 3867 if (nonstatic_word_count > 0) { 3868 nonstatic_word_count -= 1; 3869 nonstatic_word_space_count = 1; // Only one will fit 3870 length -= BytesPerInt; 3871 offset += BytesPerInt; 3872 } 3873 nonstatic_short_space_offset = offset; 3874 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3875 nonstatic_short_count -= 1; 3876 nonstatic_short_space_count += 1; 3877 length -= BytesPerShort; 3878 offset += BytesPerShort; 3879 } 3880 nonstatic_byte_space_offset = offset; 3881 while (length > 0 && nonstatic_byte_count > 0) { 3882 nonstatic_byte_count -= 1; 3883 nonstatic_byte_space_count += 1; 3884 length -= 1; 3885 } 3886 // Allocate oop field in the gap if there are no other fields for that. 3887 nonstatic_oop_space_offset = offset; 3888 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3889 allocation_style != 0) { // when oop fields not first 3890 nonstatic_oop_count -= 1; 3891 nonstatic_oop_space_count = 1; // Only one will fit 3892 length -= heapOopSize; 3893 offset += heapOopSize; 3894 } 3895 } 3896 } 3897 3898 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3899 (nonstatic_double_count * BytesPerLong); 3900 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3901 (nonstatic_word_count * BytesPerInt); 3902 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3903 (nonstatic_short_count * BytesPerShort); 3904 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3905 nonstatic_byte_count; 3906 3907 // let oops jump before padding with this allocation style 3908 if( allocation_style == 1 ) { 3909 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3910 if( nonstatic_oop_count > 0 ) { 3911 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize); 3912 } 3913 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3914 } 3915 3916 // Iterate over fields again and compute correct offsets. 3917 // The field allocation type was temporarily stored in the offset slot. 3918 // oop fields are located before non-oop fields (static and non-static). 3919 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3920 3921 // skip already laid out fields 3922 if (fs.is_offset_set()) continue; 3923 3924 // contended instance fields are handled below 3925 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3926 3927 int real_offset = 0; 3928 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3929 3930 // pack the rest of the fields 3931 switch (atype) { 3932 case STATIC_OOP: 3933 real_offset = next_static_oop_offset; 3934 next_static_oop_offset += heapOopSize; 3935 break; 3936 case STATIC_BYTE: 3937 real_offset = next_static_byte_offset; 3938 next_static_byte_offset += 1; 3939 break; 3940 case STATIC_SHORT: 3941 real_offset = next_static_short_offset; 3942 next_static_short_offset += BytesPerShort; 3943 break; 3944 case STATIC_WORD: 3945 real_offset = next_static_word_offset; 3946 next_static_word_offset += BytesPerInt; 3947 break; 3948 case STATIC_DOUBLE: 3949 real_offset = next_static_double_offset; 3950 next_static_double_offset += BytesPerLong; 3951 break; 3952 case NONSTATIC_OOP: 3953 if( nonstatic_oop_space_count > 0 ) { 3954 real_offset = nonstatic_oop_space_offset; 3955 nonstatic_oop_space_offset += heapOopSize; 3956 nonstatic_oop_space_count -= 1; 3957 } else { 3958 real_offset = next_nonstatic_oop_offset; 3959 next_nonstatic_oop_offset += heapOopSize; 3960 } 3961 3962 // Record this oop in the oop maps 3963 if( nonstatic_oop_map_count > 0 && 3964 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3965 real_offset - 3966 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3967 heapOopSize ) { 3968 // This oop is adjacent to the previous one, add to current oop map 3969 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3970 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3971 } else { 3972 // This oop is not adjacent to the previous one, create new oop map 3973 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3974 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3975 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3976 nonstatic_oop_map_count += 1; 3977 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3978 first_nonstatic_oop_offset = real_offset; 3979 } 3980 } 3981 break; 3982 case NONSTATIC_BYTE: 3983 if( nonstatic_byte_space_count > 0 ) { 3984 real_offset = nonstatic_byte_space_offset; 3985 nonstatic_byte_space_offset += 1; 3986 nonstatic_byte_space_count -= 1; 3987 } else { 3988 real_offset = next_nonstatic_byte_offset; 3989 next_nonstatic_byte_offset += 1; 3990 } 3991 break; 3992 case NONSTATIC_SHORT: 3993 if( nonstatic_short_space_count > 0 ) { 3994 real_offset = nonstatic_short_space_offset; 3995 nonstatic_short_space_offset += BytesPerShort; 3996 nonstatic_short_space_count -= 1; 3997 } else { 3998 real_offset = next_nonstatic_short_offset; 3999 next_nonstatic_short_offset += BytesPerShort; 4000 } 4001 break; 4002 case NONSTATIC_WORD: 4003 if( nonstatic_word_space_count > 0 ) { 4004 real_offset = nonstatic_word_space_offset; 4005 nonstatic_word_space_offset += BytesPerInt; 4006 nonstatic_word_space_count -= 1; 4007 } else { 4008 real_offset = next_nonstatic_word_offset; 4009 next_nonstatic_word_offset += BytesPerInt; 4010 } 4011 break; 4012 case NONSTATIC_DOUBLE: 4013 real_offset = next_nonstatic_double_offset; 4014 next_nonstatic_double_offset += BytesPerLong; 4015 break; 4016 default: 4017 ShouldNotReachHere(); 4018 } 4019 fs.set_offset(real_offset); 4020 } 4021 4022 4023 // Handle the contended cases. 4024 // 4025 // Each contended field should not intersect the cache line with another contended field. 4026 // In the absence of alignment information, we end up with pessimistically separating 4027 // the fields with full-width padding. 4028 // 4029 // Additionally, this should not break alignment for the fields, so we round the alignment up 4030 // for each field. 4031 if (nonstatic_contended_count > 0) { 4032 4033 // if there is at least one contended field, we need to have pre-padding for them 4034 next_nonstatic_padded_offset += ContendedPaddingWidth; 4035 4036 // collect all contended groups 4037 ResourceBitMap bm(cp->size()); 4038 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 4039 // skip already laid out fields 4040 if (fs.is_offset_set()) continue; 4041 4042 if (fs.is_contended()) { 4043 bm.set_bit(fs.contended_group()); 4044 } 4045 } 4046 4047 int current_group = -1; 4048 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 4049 4050 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 4051 4052 // skip already laid out fields 4053 if (fs.is_offset_set()) continue; 4054 4055 // skip non-contended fields and fields from different group 4056 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 4057 4058 // handle statics below 4059 if (fs.access_flags().is_static()) continue; 4060 4061 int real_offset = 0; 4062 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 4063 4064 switch (atype) { 4065 case NONSTATIC_BYTE: 4066 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1); 4067 real_offset = next_nonstatic_padded_offset; 4068 next_nonstatic_padded_offset += 1; 4069 break; 4070 4071 case NONSTATIC_SHORT: 4072 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort); 4073 real_offset = next_nonstatic_padded_offset; 4074 next_nonstatic_padded_offset += BytesPerShort; 4075 break; 4076 4077 case NONSTATIC_WORD: 4078 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt); 4079 real_offset = next_nonstatic_padded_offset; 4080 next_nonstatic_padded_offset += BytesPerInt; 4081 break; 4082 4083 case NONSTATIC_DOUBLE: 4084 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong); 4085 real_offset = next_nonstatic_padded_offset; 4086 next_nonstatic_padded_offset += BytesPerLong; 4087 break; 4088 4089 case NONSTATIC_OOP: 4090 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize); 4091 real_offset = next_nonstatic_padded_offset; 4092 next_nonstatic_padded_offset += heapOopSize; 4093 4094 // Record this oop in the oop maps 4095 if( nonstatic_oop_map_count > 0 && 4096 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4097 real_offset - 4098 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4099 heapOopSize ) { 4100 // This oop is adjacent to the previous one, add to current oop map 4101 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4102 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4103 } else { 4104 // This oop is not adjacent to the previous one, create new oop map 4105 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4106 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4107 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4108 nonstatic_oop_map_count += 1; 4109 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4110 first_nonstatic_oop_offset = real_offset; 4111 } 4112 } 4113 break; 4114 4115 default: 4116 ShouldNotReachHere(); 4117 } 4118 4119 if (fs.contended_group() == 0) { 4120 // Contended group defines the equivalence class over the fields: 4121 // the fields within the same contended group are not inter-padded. 4122 // The only exception is default group, which does not incur the 4123 // equivalence, and so requires intra-padding. 4124 next_nonstatic_padded_offset += ContendedPaddingWidth; 4125 } 4126 4127 fs.set_offset(real_offset); 4128 } // for 4129 4130 // Start laying out the next group. 4131 // Note that this will effectively pad the last group in the back; 4132 // this is expected to alleviate memory contention effects for 4133 // subclass fields and/or adjacent object. 4134 // If this was the default group, the padding is already in place. 4135 if (current_group != 0) { 4136 next_nonstatic_padded_offset += ContendedPaddingWidth; 4137 } 4138 } 4139 4140 // handle static fields 4141 } 4142 4143 // Entire class is contended, pad in the back. 4144 // This helps to alleviate memory contention effects for subclass fields 4145 // and/or adjacent object. 4146 if (is_contended_class) { 4147 next_nonstatic_padded_offset += ContendedPaddingWidth; 4148 } 4149 4150 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4151 4152 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize); 4153 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize); 4154 int static_fields_end = align_up(next_static_byte_offset, wordSize); 4155 4156 int static_field_size = (static_fields_end - 4157 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4158 nonstatic_field_size = nonstatic_field_size + 4159 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4160 4161 int instance_size = align_object_size(instance_end / wordSize); 4162 4163 assert(instance_size == align_object_size(align_up( 4164 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4165 wordSize) / wordSize), "consistent layout helper value"); 4166 4167 // Invariant: nonstatic_field end/start should only change if there are 4168 // nonstatic fields in the class, or if the class is contended. We compare 4169 // against the non-aligned value, so that end alignment will not fail the 4170 // assert without actually having the fields. 4171 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4172 is_contended_class || 4173 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4174 4175 // Number of non-static oop map blocks allocated at end of klass. 4176 const unsigned int total_oop_map_count = 4177 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4178 first_nonstatic_oop_offset); 4179 4180#ifndef PRODUCT 4181 if (PrintFieldLayout) { 4182 print_field_layout(_class_name, 4183 _fields, 4184 cp, 4185 instance_size, 4186 nonstatic_fields_start, 4187 nonstatic_fields_end, 4188 static_fields_end); 4189 } 4190 4191#endif 4192 // Pass back information needed for InstanceKlass creation 4193 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4194 info->nonstatic_oop_counts = nonstatic_oop_counts; 4195 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4196 info->total_oop_map_count = total_oop_map_count; 4197 info->instance_size = instance_size; 4198 info->static_field_size = static_field_size; 4199 info->nonstatic_field_size = nonstatic_field_size; 4200 info->has_nonstatic_fields = has_nonstatic_fields; 4201} 4202 4203static void fill_oop_maps(const InstanceKlass* k, 4204 unsigned int nonstatic_oop_map_count, 4205 const int* nonstatic_oop_offsets, 4206 const unsigned int* nonstatic_oop_counts) { 4207 4208 assert(k != NULL, "invariant"); 4209 4210 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4211 const InstanceKlass* const super = k->superklass(); 4212 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4213 if (super_count > 0) { 4214 // Copy maps from superklass 4215 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4216 for (unsigned int i = 0; i < super_count; ++i) { 4217 *this_oop_map++ = *super_oop_map++; 4218 } 4219 } 4220 4221 if (nonstatic_oop_map_count > 0) { 4222 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4223 // The counts differ because there is no gap between superklass's last oop 4224 // field and the first local oop field. Extend the last oop map copied 4225 // from the superklass instead of creating new one. 4226 nonstatic_oop_map_count--; 4227 nonstatic_oop_offsets++; 4228 this_oop_map--; 4229 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4230 this_oop_map++; 4231 } 4232 4233 // Add new map blocks, fill them 4234 while (nonstatic_oop_map_count-- > 0) { 4235 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4236 this_oop_map->set_count(*nonstatic_oop_counts++); 4237 this_oop_map++; 4238 } 4239 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4240 this_oop_map, "sanity"); 4241 } 4242} 4243 4244 4245void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4246 assert(ik != NULL, "invariant"); 4247 4248 const Klass* const super = ik->super(); 4249 4250 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4251 // in which case we don't have to register objects as finalizable 4252 if (!_has_empty_finalizer) { 4253 if (_has_finalizer || 4254 (super != NULL && super->has_finalizer())) { 4255 ik->set_has_finalizer(); 4256 } 4257 } 4258 4259#ifdef ASSERT 4260 bool f = false; 4261 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4262 vmSymbols::void_method_signature()); 4263 if (m != NULL && !m->is_empty_method()) { 4264 f = true; 4265 } 4266 4267 // Spec doesn't prevent agent from redefinition of empty finalizer. 4268 // Despite the fact that it's generally bad idea and redefined finalizer 4269 // will not work as expected we shouldn't abort vm in this case 4270 if (!ik->has_redefined_this_or_super()) { 4271 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4272 } 4273#endif 4274 4275 // Check if this klass supports the java.lang.Cloneable interface 4276 if (SystemDictionary::Cloneable_klass_loaded()) { 4277 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4278 ik->set_is_cloneable(); 4279 } 4280 } 4281 4282 // Check if this klass has a vanilla default constructor 4283 if (super == NULL) { 4284 // java.lang.Object has empty default constructor 4285 ik->set_has_vanilla_constructor(); 4286 } else { 4287 if (super->has_vanilla_constructor() && 4288 _has_vanilla_constructor) { 4289 ik->set_has_vanilla_constructor(); 4290 } 4291#ifdef ASSERT 4292 bool v = false; 4293 if (super->has_vanilla_constructor()) { 4294 const Method* const constructor = 4295 ik->find_method(vmSymbols::object_initializer_name(), 4296 vmSymbols::void_method_signature()); 4297 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4298 v = true; 4299 } 4300 } 4301 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4302#endif 4303 } 4304 4305 // If it cannot be fast-path allocated, set a bit in the layout helper. 4306 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4307 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4308 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4309 || ik->is_abstract() || ik->is_interface() 4310 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4311 || ik->size_helper() >= FastAllocateSizeLimit) { 4312 // Forbid fast-path allocation. 4313 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4314 ik->set_layout_helper(lh); 4315 } 4316} 4317 4318// Attach super classes and interface classes to class loader data 4319static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4320 TRAPS) { 4321 assert(defined_klass != NULL, "invariant"); 4322 4323 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4324 if (defining_loader_data->is_the_null_class_loader_data()) { 4325 // Dependencies to null class loader data are implicit. 4326 return; 4327 } else { 4328 // add super class dependency 4329 Klass* const super = defined_klass->super(); 4330 if (super != NULL) { 4331 defining_loader_data->record_dependency(super, CHECK); 4332 } 4333 4334 // add super interface dependencies 4335 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4336 if (local_interfaces != NULL) { 4337 const int length = local_interfaces->length(); 4338 for (int i = 0; i < length; i++) { 4339 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4340 } 4341 } 4342 } 4343} 4344 4345// utility methods for appending an array with check for duplicates 4346 4347static void append_interfaces(GrowableArray<Klass*>* result, 4348 const Array<Klass*>* const ifs) { 4349 // iterate over new interfaces 4350 for (int i = 0; i < ifs->length(); i++) { 4351 Klass* const e = ifs->at(i); 4352 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4353 // add new interface 4354 result->append_if_missing(e); 4355 } 4356} 4357 4358static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4359 Array<Klass*>* local_ifs, 4360 ClassLoaderData* loader_data, 4361 TRAPS) { 4362 assert(local_ifs != NULL, "invariant"); 4363 assert(loader_data != NULL, "invariant"); 4364 4365 // Compute maximum size for transitive interfaces 4366 int max_transitive_size = 0; 4367 int super_size = 0; 4368 // Add superclass transitive interfaces size 4369 if (super != NULL) { 4370 super_size = super->transitive_interfaces()->length(); 4371 max_transitive_size += super_size; 4372 } 4373 // Add local interfaces' super interfaces 4374 const int local_size = local_ifs->length(); 4375 for (int i = 0; i < local_size; i++) { 4376 Klass* const l = local_ifs->at(i); 4377 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4378 } 4379 // Finally add local interfaces 4380 max_transitive_size += local_size; 4381 // Construct array 4382 if (max_transitive_size == 0) { 4383 // no interfaces, use canonicalized array 4384 return Universe::the_empty_klass_array(); 4385 } else if (max_transitive_size == super_size) { 4386 // no new local interfaces added, share superklass' transitive interface array 4387 return super->transitive_interfaces(); 4388 } else if (max_transitive_size == local_size) { 4389 // only local interfaces added, share local interface array 4390 return local_ifs; 4391 } else { 4392 ResourceMark rm; 4393 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4394 4395 // Copy down from superclass 4396 if (super != NULL) { 4397 append_interfaces(result, super->transitive_interfaces()); 4398 } 4399 4400 // Copy down from local interfaces' superinterfaces 4401 for (int i = 0; i < local_size; i++) { 4402 Klass* const l = local_ifs->at(i); 4403 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4404 } 4405 // Finally add local interfaces 4406 append_interfaces(result, local_ifs); 4407 4408 // length will be less than the max_transitive_size if duplicates were removed 4409 const int length = result->length(); 4410 assert(length <= max_transitive_size, "just checking"); 4411 Array<Klass*>* const new_result = 4412 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4413 for (int i = 0; i < length; i++) { 4414 Klass* const e = result->at(i); 4415 assert(e != NULL, "just checking"); 4416 new_result->at_put(i, e); 4417 } 4418 return new_result; 4419 } 4420} 4421 4422static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4423 assert(this_klass != NULL, "invariant"); 4424 const Klass* const super = this_klass->super(); 4425 if (super != NULL) { 4426 4427 // If the loader is not the boot loader then throw an exception if its 4428 // superclass is in package jdk.internal.reflect and its loader is not a 4429 // special reflection class loader 4430 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) { 4431 assert(super->is_instance_klass(), "super is not instance klass"); 4432 PackageEntry* super_package = super->package(); 4433 if (super_package != NULL && 4434 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 && 4435 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) { 4436 ResourceMark rm(THREAD); 4437 Exceptions::fthrow( 4438 THREAD_AND_LOCATION, 4439 vmSymbols::java_lang_IllegalAccessError(), 4440 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s", 4441 this_klass->external_name(), 4442 this_klass->class_loader_data()->loader_name(), 4443 super->external_name()); 4444 return; 4445 } 4446 } 4447 4448 Reflection::VerifyClassAccessResults vca_result = 4449 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false); 4450 if (vca_result != Reflection::ACCESS_OK) { 4451 ResourceMark rm(THREAD); 4452 char* msg = Reflection::verify_class_access_msg(this_klass, 4453 InstanceKlass::cast(super), 4454 vca_result); 4455 if (msg == NULL) { 4456 Exceptions::fthrow( 4457 THREAD_AND_LOCATION, 4458 vmSymbols::java_lang_IllegalAccessError(), 4459 "class %s cannot access its superclass %s", 4460 this_klass->external_name(), 4461 super->external_name()); 4462 } else { 4463 // Add additional message content. 4464 Exceptions::fthrow( 4465 THREAD_AND_LOCATION, 4466 vmSymbols::java_lang_IllegalAccessError(), 4467 "superclass access check failed: %s", 4468 msg); 4469 } 4470 } 4471 } 4472} 4473 4474 4475static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4476 assert(this_klass != NULL, "invariant"); 4477 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4478 const int lng = local_interfaces->length(); 4479 for (int i = lng - 1; i >= 0; i--) { 4480 Klass* const k = local_interfaces->at(i); 4481 assert (k != NULL && k->is_interface(), "invalid interface"); 4482 Reflection::VerifyClassAccessResults vca_result = 4483 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false); 4484 if (vca_result != Reflection::ACCESS_OK) { 4485 ResourceMark rm(THREAD); 4486 char* msg = Reflection::verify_class_access_msg(this_klass, 4487 InstanceKlass::cast(k), 4488 vca_result); 4489 if (msg == NULL) { 4490 Exceptions::fthrow( 4491 THREAD_AND_LOCATION, 4492 vmSymbols::java_lang_IllegalAccessError(), 4493 "class %s cannot access its superinterface %s", 4494 this_klass->external_name(), 4495 k->external_name()); 4496 } else { 4497 // Add additional message content. 4498 Exceptions::fthrow( 4499 THREAD_AND_LOCATION, 4500 vmSymbols::java_lang_IllegalAccessError(), 4501 "superinterface check failed: %s", 4502 msg); 4503 } 4504 } 4505 } 4506} 4507 4508 4509static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4510 assert(this_klass != NULL, "invariant"); 4511 const Array<Method*>* const methods = this_klass->methods(); 4512 const int num_methods = methods->length(); 4513 4514 // go thru each method and check if it overrides a final method 4515 for (int index = 0; index < num_methods; index++) { 4516 const Method* const m = methods->at(index); 4517 4518 // skip private, static, and <init> methods 4519 if ((!m->is_private() && !m->is_static()) && 4520 (m->name() != vmSymbols::object_initializer_name())) { 4521 4522 const Symbol* const name = m->name(); 4523 const Symbol* const signature = m->signature(); 4524 const Klass* k = this_klass->super(); 4525 const Method* super_m = NULL; 4526 while (k != NULL) { 4527 // skip supers that don't have final methods. 4528 if (k->has_final_method()) { 4529 // lookup a matching method in the super class hierarchy 4530 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4531 if (super_m == NULL) { 4532 break; // didn't find any match; get out 4533 } 4534 4535 if (super_m->is_final() && !super_m->is_static() && 4536 // matching method in super is final, and not static 4537 (Reflection::verify_field_access(this_klass, 4538 super_m->method_holder(), 4539 super_m->method_holder(), 4540 super_m->access_flags(), false)) 4541 // this class can access super final method and therefore override 4542 ) { 4543 ResourceMark rm(THREAD); 4544 Exceptions::fthrow( 4545 THREAD_AND_LOCATION, 4546 vmSymbols::java_lang_VerifyError(), 4547 "class %s overrides final method %s.%s%s", 4548 this_klass->external_name(), 4549 super_m->method_holder()->external_name(), 4550 name->as_C_string(), 4551 signature->as_C_string() 4552 ); 4553 return; 4554 } 4555 4556 // continue to look from super_m's holder's super. 4557 k = super_m->method_holder()->super(); 4558 continue; 4559 } 4560 4561 k = k->super(); 4562 } 4563 } 4564 } 4565} 4566 4567 4568// assumes that this_klass is an interface 4569static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4570 assert(this_klass != NULL, "invariant"); 4571 assert(this_klass->is_interface(), "not an interface"); 4572 const Array<Method*>* methods = this_klass->methods(); 4573 const int num_methods = methods->length(); 4574 4575 for (int index = 0; index < num_methods; index++) { 4576 const Method* const m = methods->at(index); 4577 // if m is static and not the init method, throw a verify error 4578 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4579 ResourceMark rm(THREAD); 4580 Exceptions::fthrow( 4581 THREAD_AND_LOCATION, 4582 vmSymbols::java_lang_VerifyError(), 4583 "Illegal static method %s in interface %s", 4584 m->name()->as_C_string(), 4585 this_klass->external_name() 4586 ); 4587 return; 4588 } 4589 } 4590} 4591 4592// utility methods for format checking 4593 4594void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4595 const bool is_module = (flags & JVM_ACC_MODULE) != 0; 4596 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set"); 4597 if (is_module) { 4598 ResourceMark rm(THREAD); 4599 Exceptions::fthrow( 4600 THREAD_AND_LOCATION, 4601 vmSymbols::java_lang_NoClassDefFoundError(), 4602 "%s is not a class because access_flag ACC_MODULE is set", 4603 _class_name->as_C_string()); 4604 return; 4605 } 4606 4607 if (!_need_verify) { return; } 4608 4609 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4610 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4611 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4612 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4613 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4614 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4615 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4616 4617 if ((is_abstract && is_final) || 4618 (is_interface && !is_abstract) || 4619 (is_interface && major_gte_15 && (is_super || is_enum)) || 4620 (!is_interface && major_gte_15 && is_annotation)) { 4621 ResourceMark rm(THREAD); 4622 Exceptions::fthrow( 4623 THREAD_AND_LOCATION, 4624 vmSymbols::java_lang_ClassFormatError(), 4625 "Illegal class modifiers in class %s: 0x%X", 4626 _class_name->as_C_string(), flags 4627 ); 4628 return; 4629 } 4630} 4631 4632static bool has_illegal_visibility(jint flags) { 4633 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4634 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4635 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4636 4637 return ((is_public && is_protected) || 4638 (is_public && is_private) || 4639 (is_protected && is_private)); 4640} 4641 4642static bool is_supported_version(u2 major, u2 minor){ 4643 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4644 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4645 (major <= max_version) && 4646 ((major != max_version) || 4647 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4648} 4649 4650void ClassFileParser::verify_legal_field_modifiers(jint flags, 4651 bool is_interface, 4652 TRAPS) const { 4653 if (!_need_verify) { return; } 4654 4655 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4656 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4657 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4658 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4659 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4660 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4661 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4662 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4663 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4664 4665 bool is_illegal = false; 4666 4667 if (is_interface) { 4668 if (!is_public || !is_static || !is_final || is_private || 4669 is_protected || is_volatile || is_transient || 4670 (major_gte_15 && is_enum)) { 4671 is_illegal = true; 4672 } 4673 } else { // not interface 4674 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4675 is_illegal = true; 4676 } 4677 } 4678 4679 if (is_illegal) { 4680 ResourceMark rm(THREAD); 4681 Exceptions::fthrow( 4682 THREAD_AND_LOCATION, 4683 vmSymbols::java_lang_ClassFormatError(), 4684 "Illegal field modifiers in class %s: 0x%X", 4685 _class_name->as_C_string(), flags); 4686 return; 4687 } 4688} 4689 4690void ClassFileParser::verify_legal_method_modifiers(jint flags, 4691 bool is_interface, 4692 const Symbol* name, 4693 TRAPS) const { 4694 if (!_need_verify) { return; } 4695 4696 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4697 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4698 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4699 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4700 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4701 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4702 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4703 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4704 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4705 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4706 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4707 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4708 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4709 4710 bool is_illegal = false; 4711 4712 if (is_interface) { 4713 if (major_gte_8) { 4714 // Class file version is JAVA_8_VERSION or later Methods of 4715 // interfaces may set any of the flags except ACC_PROTECTED, 4716 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4717 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4718 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4719 (is_native || is_protected || is_final || is_synchronized) || 4720 // If a specific method of a class or interface has its 4721 // ACC_ABSTRACT flag set, it must not have any of its 4722 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4723 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4724 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4725 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4726 (is_abstract && (is_private || is_static || is_strict))) { 4727 is_illegal = true; 4728 } 4729 } else if (major_gte_15) { 4730 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4731 if (!is_public || is_private || is_protected || is_static || is_final || 4732 is_synchronized || is_native || !is_abstract || is_strict) { 4733 is_illegal = true; 4734 } 4735 } else { 4736 // Class file version is pre-JAVA_1_5_VERSION 4737 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4738 is_illegal = true; 4739 } 4740 } 4741 } else { // not interface 4742 if (has_illegal_visibility(flags)) { 4743 is_illegal = true; 4744 } else { 4745 if (is_initializer) { 4746 if (is_static || is_final || is_synchronized || is_native || 4747 is_abstract || (major_gte_15 && is_bridge)) { 4748 is_illegal = true; 4749 } 4750 } else { // not initializer 4751 if (is_abstract) { 4752 if ((is_final || is_native || is_private || is_static || 4753 (major_gte_15 && (is_synchronized || is_strict)))) { 4754 is_illegal = true; 4755 } 4756 } 4757 } 4758 } 4759 } 4760 4761 if (is_illegal) { 4762 ResourceMark rm(THREAD); 4763 Exceptions::fthrow( 4764 THREAD_AND_LOCATION, 4765 vmSymbols::java_lang_ClassFormatError(), 4766 "Method %s in class %s has illegal modifiers: 0x%X", 4767 name->as_C_string(), _class_name->as_C_string(), flags); 4768 return; 4769 } 4770} 4771 4772void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4773 int length, 4774 TRAPS) const { 4775 assert(_need_verify, "only called when _need_verify is true"); 4776 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) { 4777 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4778 } 4779} 4780 4781// Unqualified names may not contain the characters '.', ';', '[', or '/'. 4782// In class names, '/' separates unqualified names. This is verified in this function also. 4783// Method names also may not contain the characters '<' or '>', unless <init> 4784// or <clinit>. Note that method names may not be <init> or <clinit> in this 4785// method. Because these names have been checked as special cases before 4786// calling this method in verify_legal_method_name. 4787// 4788// This method is also called from the modular system APIs in modules.cpp 4789// to verify the validity of module and package names. 4790bool ClassFileParser::verify_unqualified_name(const char* name, 4791 unsigned int length, 4792 int type) { 4793 for (const char* p = name; p != name + length;) { 4794 jchar ch = *p; 4795 if (ch < 128) { 4796 if (ch == '.' || ch == ';' || ch == '[' ) { 4797 return false; // do not permit '.', ';', or '[' 4798 } 4799 if (ch == '/') { 4800 // check for '//' or leading or trailing '/' which are not legal 4801 // unqualified name must not be empty 4802 if (type == ClassFileParser::LegalClass) { 4803 if (p == name || p+1 >= name+length || *(p+1) == '/') { 4804 return false; 4805 } 4806 } else { 4807 return false; // do not permit '/' unless it's class name 4808 } 4809 } 4810 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) { 4811 return false; // do not permit '<' or '>' in method names 4812 } 4813 p++; 4814 } else { 4815 char* tmp_p = UTF8::next(p, &ch); 4816 p = tmp_p; 4817 } 4818 } 4819 return true; 4820} 4821 4822// Take pointer to a string. Skip over the longest part of the string that could 4823// be taken as a fieldname. Allow '/' if slash_ok is true. 4824// Return a pointer to just past the fieldname. 4825// Return NULL if no fieldname at all was found, or in the case of slash_ok 4826// being true, we saw consecutive slashes (meaning we were looking for a 4827// qualified path but found something that was badly-formed). 4828static const char* skip_over_field_name(const char* name, 4829 bool slash_ok, 4830 unsigned int length) { 4831 const char* p; 4832 jboolean last_is_slash = false; 4833 jboolean not_first_ch = false; 4834 4835 for (p = name; p != name + length; not_first_ch = true) { 4836 const char* old_p = p; 4837 jchar ch = *p; 4838 if (ch < 128) { 4839 p++; 4840 // quick check for ascii 4841 if ((ch >= 'a' && ch <= 'z') || 4842 (ch >= 'A' && ch <= 'Z') || 4843 (ch == '_' || ch == '$') || 4844 (not_first_ch && ch >= '0' && ch <= '9')) { 4845 last_is_slash = false; 4846 continue; 4847 } 4848 if (slash_ok && ch == '/') { 4849 if (last_is_slash) { 4850 return NULL; // Don't permit consecutive slashes 4851 } 4852 last_is_slash = true; 4853 continue; 4854 } 4855 } 4856 else { 4857 jint unicode_ch; 4858 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4859 p = tmp_p; 4860 last_is_slash = false; 4861 // Check if ch is Java identifier start or is Java identifier part 4862 // 4672820: call java.lang.Character methods directly without generating separate tables. 4863 EXCEPTION_MARK; 4864 4865 // return value 4866 JavaValue result(T_BOOLEAN); 4867 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4868 JavaCallArguments args; 4869 args.push_int(unicode_ch); 4870 4871 // public static boolean isJavaIdentifierStart(char ch); 4872 JavaCalls::call_static(&result, 4873 SystemDictionary::Character_klass(), 4874 vmSymbols::isJavaIdentifierStart_name(), 4875 vmSymbols::int_bool_signature(), 4876 &args, 4877 THREAD); 4878 4879 if (HAS_PENDING_EXCEPTION) { 4880 CLEAR_PENDING_EXCEPTION; 4881 return 0; 4882 } 4883 if (result.get_jboolean()) { 4884 continue; 4885 } 4886 4887 if (not_first_ch) { 4888 // public static boolean isJavaIdentifierPart(char ch); 4889 JavaCalls::call_static(&result, 4890 SystemDictionary::Character_klass(), 4891 vmSymbols::isJavaIdentifierPart_name(), 4892 vmSymbols::int_bool_signature(), 4893 &args, 4894 THREAD); 4895 4896 if (HAS_PENDING_EXCEPTION) { 4897 CLEAR_PENDING_EXCEPTION; 4898 return 0; 4899 } 4900 4901 if (result.get_jboolean()) { 4902 continue; 4903 } 4904 } 4905 } 4906 return (not_first_ch) ? old_p : NULL; 4907 } 4908 return (not_first_ch) ? p : NULL; 4909} 4910 4911// Take pointer to a string. Skip over the longest part of the string that could 4912// be taken as a field signature. Allow "void" if void_ok. 4913// Return a pointer to just past the signature. 4914// Return NULL if no legal signature is found. 4915const char* ClassFileParser::skip_over_field_signature(const char* signature, 4916 bool void_ok, 4917 unsigned int length, 4918 TRAPS) const { 4919 unsigned int array_dim = 0; 4920 while (length > 0) { 4921 switch (signature[0]) { 4922 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4923 case JVM_SIGNATURE_BOOLEAN: 4924 case JVM_SIGNATURE_BYTE: 4925 case JVM_SIGNATURE_CHAR: 4926 case JVM_SIGNATURE_SHORT: 4927 case JVM_SIGNATURE_INT: 4928 case JVM_SIGNATURE_FLOAT: 4929 case JVM_SIGNATURE_LONG: 4930 case JVM_SIGNATURE_DOUBLE: 4931 return signature + 1; 4932 case JVM_SIGNATURE_CLASS: { 4933 if (_major_version < JAVA_1_5_VERSION) { 4934 // Skip over the class name if one is there 4935 const char* const p = skip_over_field_name(signature + 1, true, --length); 4936 4937 // The next character better be a semicolon 4938 if (p && (p - signature) > 1 && p[0] == ';') { 4939 return p + 1; 4940 } 4941 } 4942 else { 4943 // Skip leading 'L' and ignore first appearance of ';' 4944 length--; 4945 signature++; 4946 char* c = strchr((char*) signature, ';'); 4947 // Format check signature 4948 if (c != NULL) { 4949 ResourceMark rm(THREAD); 4950 int newlen = c - (char*) signature; 4951 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1); 4952 strncpy(sig, signature, newlen); 4953 sig[newlen] = '\0'; 4954 4955 bool legal = verify_unqualified_name(sig, newlen, LegalClass); 4956 if (!legal) { 4957 classfile_parse_error("Class name contains illegal character " 4958 "in descriptor in class file %s", 4959 CHECK_0); 4960 return NULL; 4961 } 4962 return signature + newlen + 1; 4963 } 4964 } 4965 return NULL; 4966 } 4967 case JVM_SIGNATURE_ARRAY: 4968 array_dim++; 4969 if (array_dim > 255) { 4970 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4971 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4972 } 4973 // The rest of what's there better be a legal signature 4974 signature++; 4975 length--; 4976 void_ok = false; 4977 break; 4978 default: 4979 return NULL; 4980 } 4981 } 4982 return NULL; 4983} 4984 4985// Checks if name is a legal class name. 4986void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4987 if (!_need_verify || _relax_verify) { return; } 4988 4989 char buf[fixed_buffer_size]; 4990 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4991 unsigned int length = name->utf8_length(); 4992 bool legal = false; 4993 4994 if (length > 0) { 4995 const char* p; 4996 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4997 p = skip_over_field_signature(bytes, false, length, CHECK); 4998 legal = (p != NULL) && ((p - bytes) == (int)length); 4999 } else if (_major_version < JAVA_1_5_VERSION) { 5000 if (bytes[0] != '<') { 5001 p = skip_over_field_name(bytes, true, length); 5002 legal = (p != NULL) && ((p - bytes) == (int)length); 5003 } 5004 } else { 5005 // 4900761: relax the constraints based on JSR202 spec 5006 // Class names may be drawn from the entire Unicode character set. 5007 // Identifiers between '/' must be unqualified names. 5008 // The utf8 string has been verified when parsing cpool entries. 5009 legal = verify_unqualified_name(bytes, length, LegalClass); 5010 } 5011 } 5012 if (!legal) { 5013 ResourceMark rm(THREAD); 5014 assert(_class_name != NULL, "invariant"); 5015 Exceptions::fthrow( 5016 THREAD_AND_LOCATION, 5017 vmSymbols::java_lang_ClassFormatError(), 5018 "Illegal class name \"%s\" in class file %s", bytes, 5019 _class_name->as_C_string() 5020 ); 5021 return; 5022 } 5023} 5024 5025// Checks if name is a legal field name. 5026void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 5027 if (!_need_verify || _relax_verify) { return; } 5028 5029 char buf[fixed_buffer_size]; 5030 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5031 unsigned int length = name->utf8_length(); 5032 bool legal = false; 5033 5034 if (length > 0) { 5035 if (_major_version < JAVA_1_5_VERSION) { 5036 if (bytes[0] != '<') { 5037 const char* p = skip_over_field_name(bytes, false, length); 5038 legal = (p != NULL) && ((p - bytes) == (int)length); 5039 } 5040 } else { 5041 // 4881221: relax the constraints based on JSR202 spec 5042 legal = verify_unqualified_name(bytes, length, LegalField); 5043 } 5044 } 5045 5046 if (!legal) { 5047 ResourceMark rm(THREAD); 5048 assert(_class_name != NULL, "invariant"); 5049 Exceptions::fthrow( 5050 THREAD_AND_LOCATION, 5051 vmSymbols::java_lang_ClassFormatError(), 5052 "Illegal field name \"%s\" in class %s", bytes, 5053 _class_name->as_C_string() 5054 ); 5055 return; 5056 } 5057} 5058 5059// Checks if name is a legal method name. 5060void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 5061 if (!_need_verify || _relax_verify) { return; } 5062 5063 assert(name != NULL, "method name is null"); 5064 char buf[fixed_buffer_size]; 5065 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5066 unsigned int length = name->utf8_length(); 5067 bool legal = false; 5068 5069 if (length > 0) { 5070 if (bytes[0] == '<') { 5071 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 5072 legal = true; 5073 } 5074 } else if (_major_version < JAVA_1_5_VERSION) { 5075 const char* p; 5076 p = skip_over_field_name(bytes, false, length); 5077 legal = (p != NULL) && ((p - bytes) == (int)length); 5078 } else { 5079 // 4881221: relax the constraints based on JSR202 spec 5080 legal = verify_unqualified_name(bytes, length, LegalMethod); 5081 } 5082 } 5083 5084 if (!legal) { 5085 ResourceMark rm(THREAD); 5086 assert(_class_name != NULL, "invariant"); 5087 Exceptions::fthrow( 5088 THREAD_AND_LOCATION, 5089 vmSymbols::java_lang_ClassFormatError(), 5090 "Illegal method name \"%s\" in class %s", bytes, 5091 _class_name->as_C_string() 5092 ); 5093 return; 5094 } 5095} 5096 5097 5098// Checks if signature is a legal field signature. 5099void ClassFileParser::verify_legal_field_signature(const Symbol* name, 5100 const Symbol* signature, 5101 TRAPS) const { 5102 if (!_need_verify) { return; } 5103 5104 char buf[fixed_buffer_size]; 5105 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5106 const unsigned int length = signature->utf8_length(); 5107 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5108 5109 if (p == NULL || (p - bytes) != (int)length) { 5110 throwIllegalSignature("Field", name, signature, CHECK); 5111 } 5112} 5113 5114// Checks if signature is a legal method signature. 5115// Returns number of parameters 5116int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5117 const Symbol* signature, 5118 TRAPS) const { 5119 if (!_need_verify) { 5120 // make sure caller's args_size will be less than 0 even for non-static 5121 // method so it will be recomputed in compute_size_of_parameters(). 5122 return -2; 5123 } 5124 5125 // Class initializers cannot have args for class format version >= 51. 5126 if (name == vmSymbols::class_initializer_name() && 5127 signature != vmSymbols::void_method_signature() && 5128 _major_version >= JAVA_7_VERSION) { 5129 throwIllegalSignature("Method", name, signature, CHECK_0); 5130 return 0; 5131 } 5132 5133 unsigned int args_size = 0; 5134 char buf[fixed_buffer_size]; 5135 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5136 unsigned int length = signature->utf8_length(); 5137 const char* nextp; 5138 5139 // The first character must be a '(' 5140 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5141 length--; 5142 // Skip over legal field signatures 5143 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5144 while ((length > 0) && (nextp != NULL)) { 5145 args_size++; 5146 if (p[0] == 'J' || p[0] == 'D') { 5147 args_size++; 5148 } 5149 length -= nextp - p; 5150 p = nextp; 5151 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5152 } 5153 // The first non-signature thing better be a ')' 5154 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5155 length--; 5156 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5157 // All internal methods must return void 5158 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5159 return args_size; 5160 } 5161 } else { 5162 // Now we better just have a return value 5163 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5164 if (nextp && ((int)length == (nextp - p))) { 5165 return args_size; 5166 } 5167 } 5168 } 5169 } 5170 // Report error 5171 throwIllegalSignature("Method", name, signature, CHECK_0); 5172 return 0; 5173} 5174 5175int ClassFileParser::static_field_size() const { 5176 assert(_field_info != NULL, "invariant"); 5177 return _field_info->static_field_size; 5178} 5179 5180int ClassFileParser::total_oop_map_count() const { 5181 assert(_field_info != NULL, "invariant"); 5182 return _field_info->total_oop_map_count; 5183} 5184 5185jint ClassFileParser::layout_size() const { 5186 assert(_field_info != NULL, "invariant"); 5187 return _field_info->instance_size; 5188} 5189 5190static void check_methods_for_intrinsics(const InstanceKlass* ik, 5191 const Array<Method*>* methods) { 5192 assert(ik != NULL, "invariant"); 5193 assert(methods != NULL, "invariant"); 5194 5195 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5196 // (We used to do this lazily, but now we query it in Rewriter, 5197 // which is eagerly done for every method, so we might as well do it now, 5198 // when everything is fresh in memory.) 5199 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5200 5201 if (klass_id != vmSymbols::NO_SID) { 5202 for (int j = 0; j < methods->length(); ++j) { 5203 Method* method = methods->at(j); 5204 method->init_intrinsic_id(); 5205 5206 if (CheckIntrinsics) { 5207 // Check if an intrinsic is defined for method 'method', 5208 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5209 if (method->intrinsic_id() != vmIntrinsics::_none && 5210 !method->intrinsic_candidate()) { 5211 tty->print("Compiler intrinsic is defined for method [%s], " 5212 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5213 method->name_and_sig_as_C_string(), 5214 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5215 ); 5216 tty->cr(); 5217 DEBUG_ONLY(vm_exit(1)); 5218 } 5219 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5220 // but there is no intrinsic available for it. 5221 if (method->intrinsic_candidate() && 5222 method->intrinsic_id() == vmIntrinsics::_none) { 5223 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5224 "but no compiler intrinsic is defined for the method.%s", 5225 method->name_and_sig_as_C_string(), 5226 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5227 ); 5228 tty->cr(); 5229 DEBUG_ONLY(vm_exit(1)); 5230 } 5231 } 5232 } // end for 5233 5234#ifdef ASSERT 5235 if (CheckIntrinsics) { 5236 // Check for orphan methods in the current class. A method m 5237 // of a class C is orphan if an intrinsic is defined for method m, 5238 // but class C does not declare m. 5239 // The check is potentially expensive, therefore it is available 5240 // only in debug builds. 5241 5242 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5243 if (vmIntrinsics::_compiledLambdaForm == id) { 5244 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5245 // generated for the JVM from a LambdaForm and therefore no method 5246 // is defined for it. 5247 continue; 5248 } 5249 5250 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5251 // Check if the current class contains a method with the same 5252 // name, flags, signature. 5253 bool match = false; 5254 for (int j = 0; j < methods->length(); ++j) { 5255 const Method* method = methods->at(j); 5256 if (method->intrinsic_id() == id) { 5257 match = true; 5258 break; 5259 } 5260 } 5261 5262 if (!match) { 5263 char buf[1000]; 5264 tty->print("Compiler intrinsic is defined for method [%s], " 5265 "but the method is not available in class [%s].%s", 5266 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5267 buf, sizeof(buf)), 5268 ik->name()->as_C_string(), 5269 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5270 ); 5271 tty->cr(); 5272 DEBUG_ONLY(vm_exit(1)); 5273 } 5274 } 5275 } // end for 5276 } // CheckIntrinsics 5277#endif // ASSERT 5278 } 5279} 5280 5281InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) { 5282 if (_klass != NULL) { 5283 return _klass; 5284 } 5285 5286 InstanceKlass* const ik = 5287 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5288 5289 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL); 5290 5291 assert(_klass == ik, "invariant"); 5292 5293 ik->set_has_passed_fingerprint_check(false); 5294 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) { 5295 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik); 5296 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) { 5297 // This class matches with a class saved in an AOT library 5298 ik->set_has_passed_fingerprint_check(true); 5299 } else { 5300 ResourceMark rm; 5301 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT, 5302 ik->external_name(), aot_fp, _stream->compute_fingerprint()); 5303 } 5304 } 5305 5306 return ik; 5307} 5308 5309void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) { 5310 assert(ik != NULL, "invariant"); 5311 5312 set_klass_to_deallocate(ik); 5313 5314 assert(_field_info != NULL, "invariant"); 5315 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5316 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5317 "sanity"); 5318 5319 assert(ik->is_instance_klass(), "sanity"); 5320 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5321 5322 // Fill in information already parsed 5323 ik->set_should_verify_class(_need_verify); 5324 5325 // Not yet: supers are done below to support the new subtype-checking fields 5326 ik->set_class_loader_data(_loader_data); 5327 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5328 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5329 assert(_fac != NULL, "invariant"); 5330 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5331 5332 // this transfers ownership of a lot of arrays from 5333 // the parser onto the InstanceKlass* 5334 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5335 5336 // note that is not safe to use the fields in the parser from this point on 5337 assert(NULL == _cp, "invariant"); 5338 assert(NULL == _fields, "invariant"); 5339 assert(NULL == _methods, "invariant"); 5340 assert(NULL == _inner_classes, "invariant"); 5341 assert(NULL == _local_interfaces, "invariant"); 5342 assert(NULL == _transitive_interfaces, "invariant"); 5343 assert(NULL == _combined_annotations, "invariant"); 5344 5345 if (_has_final_method) { 5346 ik->set_has_final_method(); 5347 } 5348 5349 ik->copy_method_ordering(_method_ordering, CHECK); 5350 // The InstanceKlass::_methods_jmethod_ids cache 5351 // is managed on the assumption that the initial cache 5352 // size is equal to the number of methods in the class. If 5353 // that changes, then InstanceKlass::idnum_can_increment() 5354 // has to be changed accordingly. 5355 ik->set_initial_method_idnum(ik->methods()->length()); 5356 5357 ik->set_name(_class_name); 5358 5359 if (is_anonymous()) { 5360 // _this_class_index is a CONSTANT_Class entry that refers to this 5361 // anonymous class itself. If this class needs to refer to its own methods or 5362 // fields, it would use a CONSTANT_MethodRef, etc, which would reference 5363 // _this_class_index. However, because this class is anonymous (it's 5364 // not stored in SystemDictionary), _this_class_index cannot be resolved 5365 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup. 5366 // Therefore, we must eagerly resolve _this_class_index now. 5367 ik->constants()->klass_at_put(_this_class_index, ik); 5368 } 5369 5370 ik->set_minor_version(_minor_version); 5371 ik->set_major_version(_major_version); 5372 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods); 5373 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods); 5374 5375 if (_host_klass != NULL) { 5376 assert (ik->is_anonymous(), "should be the same"); 5377 ik->set_host_klass(_host_klass); 5378 } 5379 5380 // Set PackageEntry for this_klass 5381 oop cl = ik->class_loader(); 5382 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl)); 5383 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh()); 5384 ik->set_package(cld, CHECK); 5385 5386 const Array<Method*>* const methods = ik->methods(); 5387 assert(methods != NULL, "invariant"); 5388 const int methods_len = methods->length(); 5389 5390 check_methods_for_intrinsics(ik, methods); 5391 5392 // Fill in field values obtained by parse_classfile_attributes 5393 if (_parsed_annotations->has_any_annotations()) { 5394 _parsed_annotations->apply_to(ik); 5395 } 5396 5397 apply_parsed_class_attributes(ik); 5398 5399 // Miranda methods 5400 if ((_num_miranda_methods > 0) || 5401 // if this class introduced new miranda methods or 5402 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5403 // super class exists and this class inherited miranda methods 5404 ) { 5405 ik->set_has_miranda_methods(); // then set a flag 5406 } 5407 5408 // Fill in information needed to compute superclasses. 5409 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5410 5411 // Initialize itable offset tables 5412 klassItable::setup_itable_offset_table(ik); 5413 5414 // Compute transitive closure of interfaces this class implements 5415 // Do final class setup 5416 fill_oop_maps(ik, 5417 _field_info->nonstatic_oop_map_count, 5418 _field_info->nonstatic_oop_offsets, 5419 _field_info->nonstatic_oop_counts); 5420 5421 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5422 set_precomputed_flags(ik); 5423 5424 // check if this class can access its super class 5425 check_super_class_access(ik, CHECK); 5426 5427 // check if this class can access its superinterfaces 5428 check_super_interface_access(ik, CHECK); 5429 5430 // check if this class overrides any final method 5431 check_final_method_override(ik, CHECK); 5432 5433 // reject static interface methods prior to Java 8 5434 if (ik->is_interface() && _major_version < JAVA_8_VERSION) { 5435 check_illegal_static_method(ik, CHECK); 5436 } 5437 5438 // Obtain this_klass' module entry 5439 ModuleEntry* module_entry = ik->module(); 5440 assert(module_entry != NULL, "module_entry should always be set"); 5441 5442 // Obtain java.lang.Module 5443 Handle module_handle(THREAD, module_entry->module()); 5444 5445 // Allocate mirror and initialize static fields 5446 // The create_mirror() call will also call compute_modifiers() 5447 java_lang_Class::create_mirror(ik, 5448 Handle(THREAD, _loader_data->class_loader()), 5449 module_handle, 5450 _protection_domain, 5451 CHECK); 5452 5453 assert(_all_mirandas != NULL, "invariant"); 5454 5455 // Generate any default methods - default methods are public interface methods 5456 // that have a default implementation. This is new with Java 8. 5457 if (_has_nonstatic_concrete_methods) { 5458 DefaultMethods::generate_default_methods(ik, 5459 _all_mirandas, 5460 CHECK); 5461 } 5462 5463 // Add read edges to the unnamed modules of the bootstrap and app class loaders. 5464 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() && 5465 !module_entry->has_default_read_edges()) { 5466 if (!module_entry->set_has_default_read_edges()) { 5467 // We won a potential race 5468 JvmtiExport::add_default_read_edges(module_handle, THREAD); 5469 } 5470 } 5471 5472 // Update the loader_data graph. 5473 record_defined_class_dependencies(ik, CHECK); 5474 5475 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5476 5477 if (!is_internal()) { 5478 if (log_is_enabled(Info, class, load)) { 5479 ResourceMark rm; 5480 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string(); 5481 ik->print_class_load_logging(_loader_data, module_name, _stream); 5482 } 5483 5484 if (log_is_enabled(Debug, class, resolve)) { 5485 ResourceMark rm; 5486 // print out the superclass. 5487 const char * from = ik->external_name(); 5488 if (ik->java_super() != NULL) { 5489 log_debug(class, resolve)("%s %s (super)", 5490 from, 5491 ik->java_super()->external_name()); 5492 } 5493 // print out each of the interface classes referred to by this class. 5494 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5495 if (local_interfaces != NULL) { 5496 const int length = local_interfaces->length(); 5497 for (int i = 0; i < length; i++) { 5498 const Klass* const k = local_interfaces->at(i); 5499 const char * to = k->external_name(); 5500 log_debug(class, resolve)("%s %s (interface)", from, to); 5501 } 5502 } 5503 } 5504 } 5505 5506 TRACE_INIT_ID(ik); 5507 5508 // If we reach here, all is well. 5509 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5510 // in order for it to not be destroyed in the ClassFileParser destructor. 5511 set_klass_to_deallocate(NULL); 5512 5513 // it's official 5514 set_klass(ik); 5515 5516 debug_only(ik->verify();) 5517} 5518 5519// For an anonymous class that is in the unnamed package, move it to its host class's 5520// package by prepending its host class's package name to its class name and setting 5521// its _class_name field. 5522void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) { 5523 ResourceMark rm(THREAD); 5524 assert(strrchr(_class_name->as_C_string(), '/') == NULL, 5525 "Anonymous class should not be in a package"); 5526 const char* host_pkg_name = 5527 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL); 5528 5529 if (host_pkg_name != NULL) { 5530 size_t host_pkg_len = strlen(host_pkg_name); 5531 int class_name_len = _class_name->utf8_length(); 5532 char* new_anon_name = 5533 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len); 5534 // Copy host package name and trailing /. 5535 strncpy(new_anon_name, host_pkg_name, host_pkg_len); 5536 new_anon_name[host_pkg_len] = '/'; 5537 // Append anonymous class name. The anonymous class name can contain odd 5538 // characters. So, do a strncpy instead of using sprintf("%s..."). 5539 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len); 5540 5541 // Create a symbol and update the anonymous class name. 5542 _class_name = SymbolTable::new_symbol(new_anon_name, 5543 (int)host_pkg_len + 1 + class_name_len, 5544 CHECK); 5545 } 5546} 5547 5548// If the host class and the anonymous class are in the same package then do 5549// nothing. If the anonymous class is in the unnamed package then move it to its 5550// host's package. If the classes are in different packages then throw an IAE 5551// exception. 5552void ClassFileParser::fix_anonymous_class_name(TRAPS) { 5553 assert(_host_klass != NULL, "Expected an anonymous class"); 5554 5555 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(), 5556 _class_name->utf8_length(), '/'); 5557 if (anon_last_slash == NULL) { // Unnamed package 5558 prepend_host_package_name(_host_klass, CHECK); 5559 } else { 5560 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) { 5561 ResourceMark rm(THREAD); 5562 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 5563 err_msg("Host class %s and anonymous class %s are in different packages", 5564 _host_klass->name()->as_C_string(), _class_name->as_C_string())); 5565 } 5566 } 5567} 5568 5569static bool relax_format_check_for(ClassLoaderData* loader_data) { 5570 bool trusted = (loader_data->is_the_null_class_loader_data() || 5571 SystemDictionary::is_platform_class_loader(loader_data->class_loader())); 5572 bool need_verify = 5573 // verifyAll 5574 (BytecodeVerificationLocal && BytecodeVerificationRemote) || 5575 // verifyRemote 5576 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); 5577 return !need_verify; 5578} 5579 5580ClassFileParser::ClassFileParser(ClassFileStream* stream, 5581 Symbol* name, 5582 ClassLoaderData* loader_data, 5583 Handle protection_domain, 5584 const InstanceKlass* host_klass, 5585 GrowableArray<Handle>* cp_patches, 5586 Publicity pub_level, 5587 TRAPS) : 5588 _stream(stream), 5589 _requested_name(name), 5590 _loader_data(loader_data), 5591 _host_klass(host_klass), 5592 _cp_patches(cp_patches), 5593 _num_patched_klasses(0), 5594 _max_num_patched_klasses(0), 5595 _orig_cp_size(0), 5596 _first_patched_klass_resolved_index(0), 5597 _super_klass(), 5598 _cp(NULL), 5599 _fields(NULL), 5600 _methods(NULL), 5601 _inner_classes(NULL), 5602 _local_interfaces(NULL), 5603 _transitive_interfaces(NULL), 5604 _combined_annotations(NULL), 5605 _annotations(NULL), 5606 _type_annotations(NULL), 5607 _fields_annotations(NULL), 5608 _fields_type_annotations(NULL), 5609 _klass(NULL), 5610 _klass_to_deallocate(NULL), 5611 _parsed_annotations(NULL), 5612 _fac(NULL), 5613 _field_info(NULL), 5614 _method_ordering(NULL), 5615 _all_mirandas(NULL), 5616 _vtable_size(0), 5617 _itable_size(0), 5618 _num_miranda_methods(0), 5619 _rt(REF_NONE), 5620 _protection_domain(protection_domain), 5621 _access_flags(), 5622 _pub_level(pub_level), 5623 _bad_constant_seen(0), 5624 _synthetic_flag(false), 5625 _sde_length(false), 5626 _sde_buffer(NULL), 5627 _sourcefile_index(0), 5628 _generic_signature_index(0), 5629 _major_version(0), 5630 _minor_version(0), 5631 _this_class_index(0), 5632 _super_class_index(0), 5633 _itfs_len(0), 5634 _java_fields_count(0), 5635 _need_verify(false), 5636 _relax_verify(false), 5637 _has_nonstatic_concrete_methods(false), 5638 _declares_nonstatic_concrete_methods(false), 5639 _has_final_method(false), 5640 _has_finalizer(false), 5641 _has_empty_finalizer(false), 5642 _has_vanilla_constructor(false), 5643 _max_bootstrap_specifier_index(-1) { 5644 5645 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5646 5647 assert(THREAD->is_Java_thread(), "invariant"); 5648 assert(_loader_data != NULL, "invariant"); 5649 assert(stream != NULL, "invariant"); 5650 assert(_stream != NULL, "invariant"); 5651 assert(_stream->buffer() == _stream->current(), "invariant"); 5652 assert(_class_name != NULL, "invariant"); 5653 assert(0 == _access_flags.as_int(), "invariant"); 5654 5655 // Figure out whether we can skip format checking (matching classic VM behavior) 5656 if (DumpSharedSpaces) { 5657 // verify == true means it's a 'remote' class (i.e., non-boot class) 5658 // Verification decision is based on BytecodeVerificationRemote flag 5659 // for those classes. 5660 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5661 BytecodeVerificationLocal; 5662 } 5663 else { 5664 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5665 stream->need_verify()); 5666 } 5667 if (_cp_patches != NULL) { 5668 int len = _cp_patches->length(); 5669 for (int i=0; i<len; i++) { 5670 if (has_cp_patch_at(i)) { 5671 Handle patch = cp_patch_at(i); 5672 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) { 5673 // We need to append the names of the patched classes to the end of the constant pool, 5674 // because a patched class may have a Utf8 name that's not already included in the 5675 // original constant pool. These class names are used when patch_constant_pool() 5676 // calls patch_class(). 5677 // 5678 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class. 5679 // At this point, we don't know the tag for index i yet, because we haven't parsed the 5680 // constant pool. So we can only assume the worst -- every String is used to patch a Class. 5681 _max_num_patched_klasses++; 5682 } 5683 } 5684 } 5685 } 5686 5687 // synch back verification state to stream 5688 stream->set_verify(_need_verify); 5689 5690 // Check if verification needs to be relaxed for this class file 5691 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5692 _relax_verify = relax_format_check_for(_loader_data); 5693 5694 parse_stream(stream, CHECK); 5695 5696 post_process_parsed_stream(stream, _cp, CHECK); 5697} 5698 5699void ClassFileParser::clear_class_metadata() { 5700 // metadata created before the instance klass is created. Must be 5701 // deallocated if classfile parsing returns an error. 5702 _cp = NULL; 5703 _fields = NULL; 5704 _methods = NULL; 5705 _inner_classes = NULL; 5706 _local_interfaces = NULL; 5707 _transitive_interfaces = NULL; 5708 _combined_annotations = NULL; 5709 _annotations = _type_annotations = NULL; 5710 _fields_annotations = _fields_type_annotations = NULL; 5711} 5712 5713// Destructor to clean up 5714ClassFileParser::~ClassFileParser() { 5715 if (_cp != NULL) { 5716 MetadataFactory::free_metadata(_loader_data, _cp); 5717 } 5718 if (_fields != NULL) { 5719 MetadataFactory::free_array<u2>(_loader_data, _fields); 5720 } 5721 5722 if (_methods != NULL) { 5723 // Free methods 5724 InstanceKlass::deallocate_methods(_loader_data, _methods); 5725 } 5726 5727 // beware of the Universe::empty_blah_array!! 5728 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5729 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5730 } 5731 5732 // Free interfaces 5733 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5734 _local_interfaces, _transitive_interfaces); 5735 5736 if (_combined_annotations != NULL) { 5737 // After all annotations arrays have been created, they are installed into the 5738 // Annotations object that will be assigned to the InstanceKlass being created. 5739 5740 // Deallocate the Annotations object and the installed annotations arrays. 5741 _combined_annotations->deallocate_contents(_loader_data); 5742 5743 // If the _combined_annotations pointer is non-NULL, 5744 // then the other annotations fields should have been cleared. 5745 assert(_annotations == NULL, "Should have been cleared"); 5746 assert(_type_annotations == NULL, "Should have been cleared"); 5747 assert(_fields_annotations == NULL, "Should have been cleared"); 5748 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5749 } else { 5750 // If the annotations arrays were not installed into the Annotations object, 5751 // then they have to be deallocated explicitly. 5752 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5753 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5754 Annotations::free_contents(_loader_data, _fields_annotations); 5755 Annotations::free_contents(_loader_data, _fields_type_annotations); 5756 } 5757 5758 clear_class_metadata(); 5759 5760 // deallocate the klass if already created. Don't directly deallocate, but add 5761 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5762 // at a safepoint. 5763 if (_klass_to_deallocate != NULL) { 5764 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5765 } 5766} 5767 5768void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5769 TRAPS) { 5770 5771 assert(stream != NULL, "invariant"); 5772 assert(_class_name != NULL, "invariant"); 5773 5774 // BEGIN STREAM PARSING 5775 stream->guarantee_more(8, CHECK); // magic, major, minor 5776 // Magic value 5777 const u4 magic = stream->get_u4_fast(); 5778 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5779 "Incompatible magic value %u in class file %s", 5780 magic, CHECK); 5781 5782 // Version numbers 5783 _minor_version = stream->get_u2_fast(); 5784 _major_version = stream->get_u2_fast(); 5785 5786 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5787 ResourceMark rm; 5788 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5789 _major_version, _minor_version, _class_name->as_C_string()); 5790 Exceptions::fthrow( 5791 THREAD_AND_LOCATION, 5792 vmSymbols::java_lang_UnsupportedClassVersionError(), 5793 "Unsupported major.minor version for dump time %u.%u", 5794 _major_version, 5795 _minor_version); 5796 } 5797 5798 // Check version numbers - we check this even with verifier off 5799 if (!is_supported_version(_major_version, _minor_version)) { 5800 ResourceMark rm(THREAD); 5801 Exceptions::fthrow( 5802 THREAD_AND_LOCATION, 5803 vmSymbols::java_lang_UnsupportedClassVersionError(), 5804 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5805 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5806 _class_name->as_C_string(), 5807 _major_version, 5808 _minor_version, 5809 JAVA_MAX_SUPPORTED_VERSION, 5810 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5811 return; 5812 } 5813 5814 stream->guarantee_more(3, CHECK); // length, first cp tag 5815 u2 cp_size = stream->get_u2_fast(); 5816 5817 guarantee_property( 5818 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5819 cp_size, CHECK); 5820 5821 _orig_cp_size = cp_size; 5822 if (int(cp_size) + _max_num_patched_klasses > 0xffff) { 5823 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes"); 5824 } 5825 cp_size += _max_num_patched_klasses; 5826 5827 _cp = ConstantPool::allocate(_loader_data, 5828 cp_size, 5829 CHECK); 5830 5831 ConstantPool* const cp = _cp; 5832 5833 parse_constant_pool(stream, cp, _orig_cp_size, CHECK); 5834 5835 assert(cp_size == (const u2)cp->length(), "invariant"); 5836 5837 // ACCESS FLAGS 5838 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5839 5840 // Access flags 5841 jint flags; 5842 // JVM_ACC_MODULE is defined in JDK-9 and later. 5843 if (_major_version >= JAVA_9_VERSION) { 5844 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE); 5845 } else { 5846 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5847 } 5848 5849 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5850 // Set abstract bit for old class files for backward compatibility 5851 flags |= JVM_ACC_ABSTRACT; 5852 } 5853 5854 verify_legal_class_modifiers(flags, CHECK); 5855 5856 short bad_constant = class_bad_constant_seen(); 5857 if (bad_constant != 0) { 5858 // Do not throw CFE until after the access_flags are checked because if 5859 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE. 5860 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK); 5861 } 5862 5863 _access_flags.set_flags(flags); 5864 5865 // This class and superclass 5866 _this_class_index = stream->get_u2_fast(); 5867 check_property( 5868 valid_cp_range(_this_class_index, cp_size) && 5869 cp->tag_at(_this_class_index).is_unresolved_klass(), 5870 "Invalid this class index %u in constant pool in class file %s", 5871 _this_class_index, CHECK); 5872 5873 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5874 assert(class_name_in_cp != NULL, "class_name can't be null"); 5875 5876 // Update _class_name which could be null previously 5877 // to reflect the name in the constant pool 5878 _class_name = class_name_in_cp; 5879 5880 // Don't need to check whether this class name is legal or not. 5881 // It has been checked when constant pool is parsed. 5882 // However, make sure it is not an array type. 5883 if (_need_verify) { 5884 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5885 "Bad class name in class file %s", 5886 CHECK); 5887 } 5888 5889 // Checks if name in class file matches requested name 5890 if (_requested_name != NULL && _requested_name != _class_name) { 5891 ResourceMark rm(THREAD); 5892 Exceptions::fthrow( 5893 THREAD_AND_LOCATION, 5894 vmSymbols::java_lang_NoClassDefFoundError(), 5895 "%s (wrong name: %s)", 5896 _class_name->as_C_string(), 5897 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5898 ); 5899 return; 5900 } 5901 5902 // if this is an anonymous class fix up its name if it's in the unnamed 5903 // package. Otherwise, throw IAE if it is in a different package than 5904 // its host class. 5905 if (_host_klass != NULL) { 5906 fix_anonymous_class_name(CHECK); 5907 } 5908 5909 // Verification prevents us from creating names with dots in them, this 5910 // asserts that that's the case. 5911 assert(is_internal_format(_class_name), "external class name format used internally"); 5912 5913 if (!is_internal()) { 5914 LogTarget(Debug, class, preorder) lt; 5915 if (lt.is_enabled()){ 5916 ResourceMark rm(THREAD); 5917 LogStream ls(lt); 5918 ls.print("%s", _class_name->as_klass_external_name()); 5919 if (stream->source() != NULL) { 5920 ls.print(" source: %s", stream->source()); 5921 } 5922 ls.cr(); 5923 } 5924 5925#if INCLUDE_CDS 5926 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5927 // Only dump the classes that can be stored into CDS archive. 5928 // Anonymous classes such as generated LambdaForm classes are also not included. 5929 if (SystemDictionaryShared::is_sharing_possible(_loader_data) && 5930 _host_klass == NULL) { 5931 oop class_loader = _loader_data->class_loader(); 5932 ResourceMark rm(THREAD); 5933 // For the boot and platform class loaders, check if the class is not found in the 5934 // java runtime image. Additional check for the boot class loader is if the class 5935 // is not found in the boot loader's appended entries. This indicates that the class 5936 // is not useable during run time, such as the ones found in the --patch-module entries, 5937 // so it should not be included in the classlist file. 5938 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) || 5939 SystemDictionary::is_platform_class_loader(class_loader)) && 5940 !ClassLoader::is_jrt(stream->source())) { 5941 tty->print_cr("skip writing class %s from source %s to classlist file", 5942 _class_name->as_C_string(), stream->source()); 5943 } else { 5944 classlist_file->print_cr("%s", _class_name->as_C_string()); 5945 classlist_file->flush(); 5946 } 5947 } 5948 } 5949#endif 5950 } 5951 5952 // SUPERKLASS 5953 _super_class_index = stream->get_u2_fast(); 5954 _super_klass = parse_super_class(cp, 5955 _super_class_index, 5956 _need_verify, 5957 CHECK); 5958 5959 // Interfaces 5960 _itfs_len = stream->get_u2_fast(); 5961 parse_interfaces(stream, 5962 _itfs_len, 5963 cp, 5964 &_has_nonstatic_concrete_methods, 5965 CHECK); 5966 5967 assert(_local_interfaces != NULL, "invariant"); 5968 5969 // Fields (offsets are filled in later) 5970 _fac = new FieldAllocationCount(); 5971 parse_fields(stream, 5972 _access_flags.is_interface(), 5973 _fac, 5974 cp, 5975 cp_size, 5976 &_java_fields_count, 5977 CHECK); 5978 5979 assert(_fields != NULL, "invariant"); 5980 5981 // Methods 5982 AccessFlags promoted_flags; 5983 parse_methods(stream, 5984 _access_flags.is_interface(), 5985 &promoted_flags, 5986 &_has_final_method, 5987 &_declares_nonstatic_concrete_methods, 5988 CHECK); 5989 5990 assert(_methods != NULL, "invariant"); 5991 5992 // promote flags from parse_methods() to the klass' flags 5993 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5994 5995 if (_declares_nonstatic_concrete_methods) { 5996 _has_nonstatic_concrete_methods = true; 5997 } 5998 5999 // Additional attributes/annotations 6000 _parsed_annotations = new ClassAnnotationCollector(); 6001 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 6002 6003 assert(_inner_classes != NULL, "invariant"); 6004 6005 // Finalize the Annotations metadata object, 6006 // now that all annotation arrays have been created. 6007 create_combined_annotations(CHECK); 6008 6009 // Make sure this is the end of class file stream 6010 guarantee_property(stream->at_eos(), 6011 "Extra bytes at the end of class file %s", 6012 CHECK); 6013 6014 // all bytes in stream read and parsed 6015} 6016 6017void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 6018 ConstantPool* cp, 6019 TRAPS) { 6020 assert(stream != NULL, "invariant"); 6021 assert(stream->at_eos(), "invariant"); 6022 assert(cp != NULL, "invariant"); 6023 assert(_loader_data != NULL, "invariant"); 6024 6025 if (_class_name == vmSymbols::java_lang_Object()) { 6026 check_property(_local_interfaces == Universe::the_empty_klass_array(), 6027 "java.lang.Object cannot implement an interface in class file %s", 6028 CHECK); 6029 } 6030 // We check super class after class file is parsed and format is checked 6031 if (_super_class_index > 0 && NULL ==_super_klass) { 6032 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 6033 if (_access_flags.is_interface()) { 6034 // Before attempting to resolve the superclass, check for class format 6035 // errors not checked yet. 6036 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 6037 "Interfaces must have java.lang.Object as superclass in class file %s", 6038 CHECK); 6039 } 6040 Handle loader(THREAD, _loader_data->class_loader()); 6041 _super_klass = (const InstanceKlass*) 6042 SystemDictionary::resolve_super_or_fail(_class_name, 6043 super_class_name, 6044 loader, 6045 _protection_domain, 6046 true, 6047 CHECK); 6048 } 6049 6050 if (_super_klass != NULL) { 6051 if (_super_klass->has_nonstatic_concrete_methods()) { 6052 _has_nonstatic_concrete_methods = true; 6053 } 6054 6055 if (_super_klass->is_interface()) { 6056 ResourceMark rm(THREAD); 6057 Exceptions::fthrow( 6058 THREAD_AND_LOCATION, 6059 vmSymbols::java_lang_IncompatibleClassChangeError(), 6060 "class %s has interface %s as super class", 6061 _class_name->as_klass_external_name(), 6062 _super_klass->external_name() 6063 ); 6064 return; 6065 } 6066 // Make sure super class is not final 6067 if (_super_klass->is_final()) { 6068 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 6069 } 6070 } 6071 6072 // Compute the transitive list of all unique interfaces implemented by this class 6073 _transitive_interfaces = 6074 compute_transitive_interfaces(_super_klass, 6075 _local_interfaces, 6076 _loader_data, 6077 CHECK); 6078 6079 assert(_transitive_interfaces != NULL, "invariant"); 6080 6081 // sort methods 6082 _method_ordering = sort_methods(_methods); 6083 6084 _all_mirandas = new GrowableArray<Method*>(20); 6085 6086 Handle loader(THREAD, _loader_data->class_loader()); 6087 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 6088 &_num_miranda_methods, 6089 _all_mirandas, 6090 _super_klass, 6091 _methods, 6092 _access_flags, 6093 _major_version, 6094 loader, 6095 _class_name, 6096 _local_interfaces, 6097 CHECK); 6098 6099 // Size of Java itable (in words) 6100 _itable_size = _access_flags.is_interface() ? 0 : 6101 klassItable::compute_itable_size(_transitive_interfaces); 6102 6103 assert(_fac != NULL, "invariant"); 6104 assert(_parsed_annotations != NULL, "invariant"); 6105 6106 _field_info = new FieldLayoutInfo(); 6107 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 6108 6109 // Compute reference typ 6110 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 6111 6112} 6113 6114void ClassFileParser::set_klass(InstanceKlass* klass) { 6115 6116#ifdef ASSERT 6117 if (klass != NULL) { 6118 assert(NULL == _klass, "leaking?"); 6119 } 6120#endif 6121 6122 _klass = klass; 6123} 6124 6125void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 6126 6127#ifdef ASSERT 6128 if (klass != NULL) { 6129 assert(NULL == _klass_to_deallocate, "leaking?"); 6130 } 6131#endif 6132 6133 _klass_to_deallocate = klass; 6134} 6135 6136// Caller responsible for ResourceMark 6137// clone stream with rewound position 6138const ClassFileStream* ClassFileParser::clone_stream() const { 6139 assert(_stream != NULL, "invariant"); 6140 6141 return _stream->clone(); 6142} 6143// ---------------------------------------------------------------------------- 6144// debugging 6145 6146#ifdef ASSERT 6147 6148// return true if class_name contains no '.' (internal format is '/') 6149bool ClassFileParser::is_internal_format(Symbol* class_name) { 6150 if (class_name != NULL) { 6151 ResourceMark rm; 6152 char* name = class_name->as_C_string(); 6153 return strchr(name, '.') == NULL; 6154 } else { 6155 return true; 6156 } 6157} 6158 6159#endif 6160