classFileParser.cpp revision 3465:d2a62e0f25eb
1/* 2 * Copyright (c) 1997, 2012, 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 25#include "precompiled.hpp" 26#include "classfile/classFileParser.hpp" 27#include "classfile/classLoader.hpp" 28#include "classfile/javaClasses.hpp" 29#include "classfile/symbolTable.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/verificationType.hpp" 32#include "classfile/verifier.hpp" 33#include "classfile/vmSymbols.hpp" 34#include "memory/allocation.hpp" 35#include "memory/gcLocker.hpp" 36#include "memory/oopFactory.hpp" 37#include "memory/universe.inline.hpp" 38#include "oops/constantPoolOop.hpp" 39#include "oops/fieldStreams.hpp" 40#include "oops/instanceKlass.hpp" 41#include "oops/instanceMirrorKlass.hpp" 42#include "oops/klass.inline.hpp" 43#include "oops/klassOop.hpp" 44#include "oops/klassVtable.hpp" 45#include "oops/methodOop.hpp" 46#include "oops/symbol.hpp" 47#include "prims/jvmtiExport.hpp" 48#include "prims/jvmtiThreadState.hpp" 49#include "runtime/javaCalls.hpp" 50#include "runtime/perfData.hpp" 51#include "runtime/reflection.hpp" 52#include "runtime/signature.hpp" 53#include "runtime/timer.hpp" 54#include "services/classLoadingService.hpp" 55#include "services/threadService.hpp" 56 57// We generally try to create the oops directly when parsing, rather than 58// allocating temporary data structures and copying the bytes twice. A 59// temporary area is only needed when parsing utf8 entries in the constant 60// pool and when parsing line number tables. 61 62// We add assert in debug mode when class format is not checked. 63 64#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 65#define JAVA_MIN_SUPPORTED_VERSION 45 66#define JAVA_MAX_SUPPORTED_VERSION 51 67#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 68 69// Used for two backward compatibility reasons: 70// - to check for new additions to the class file format in JDK1.5 71// - to check for bug fixes in the format checker in JDK1.5 72#define JAVA_1_5_VERSION 49 73 74// Used for backward compatibility reasons: 75// - to check for javac bug fixes that happened after 1.5 76// - also used as the max version when running in jdk6 77#define JAVA_6_VERSION 50 78 79// Used for backward compatibility reasons: 80// - to check NameAndType_info signatures more aggressively 81#define JAVA_7_VERSION 51 82 83 84void ClassFileParser::parse_constant_pool_entries(Handle class_loader, constantPoolHandle cp, int length, TRAPS) { 85 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 86 // this function (_current can be allocated in a register, with scalar 87 // replacement of aggregates). The _current pointer is copied back to 88 // stream() when this function returns. DON'T call another method within 89 // this method that uses stream(). 90 ClassFileStream* cfs0 = stream(); 91 ClassFileStream cfs1 = *cfs0; 92 ClassFileStream* cfs = &cfs1; 93#ifdef ASSERT 94 assert(cfs->allocated_on_stack(),"should be local"); 95 u1* old_current = cfs0->current(); 96#endif 97 98 // Used for batching symbol allocations. 99 const char* names[SymbolTable::symbol_alloc_batch_size]; 100 int lengths[SymbolTable::symbol_alloc_batch_size]; 101 int indices[SymbolTable::symbol_alloc_batch_size]; 102 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 103 int names_count = 0; 104 105 // parsing Index 0 is unused 106 for (int index = 1; index < length; index++) { 107 // Each of the following case guarantees one more byte in the stream 108 // for the following tag or the access_flags following constant pool, 109 // so we don't need bounds-check for reading tag. 110 u1 tag = cfs->get_u1_fast(); 111 switch (tag) { 112 case JVM_CONSTANT_Class : 113 { 114 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 115 u2 name_index = cfs->get_u2_fast(); 116 cp->klass_index_at_put(index, name_index); 117 } 118 break; 119 case JVM_CONSTANT_Fieldref : 120 { 121 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 122 u2 class_index = cfs->get_u2_fast(); 123 u2 name_and_type_index = cfs->get_u2_fast(); 124 cp->field_at_put(index, class_index, name_and_type_index); 125 } 126 break; 127 case JVM_CONSTANT_Methodref : 128 { 129 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 130 u2 class_index = cfs->get_u2_fast(); 131 u2 name_and_type_index = cfs->get_u2_fast(); 132 cp->method_at_put(index, class_index, name_and_type_index); 133 } 134 break; 135 case JVM_CONSTANT_InterfaceMethodref : 136 { 137 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 138 u2 class_index = cfs->get_u2_fast(); 139 u2 name_and_type_index = cfs->get_u2_fast(); 140 cp->interface_method_at_put(index, class_index, name_and_type_index); 141 } 142 break; 143 case JVM_CONSTANT_String : 144 { 145 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 146 u2 string_index = cfs->get_u2_fast(); 147 cp->string_index_at_put(index, string_index); 148 } 149 break; 150 case JVM_CONSTANT_MethodHandle : 151 case JVM_CONSTANT_MethodType : 152 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 153 classfile_parse_error( 154 "Class file version does not support constant tag %u in class file %s", 155 tag, CHECK); 156 } 157 if (!EnableInvokeDynamic) { 158 classfile_parse_error( 159 "This JVM does not support constant tag %u in class file %s", 160 tag, CHECK); 161 } 162 if (tag == JVM_CONSTANT_MethodHandle) { 163 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 164 u1 ref_kind = cfs->get_u1_fast(); 165 u2 method_index = cfs->get_u2_fast(); 166 cp->method_handle_index_at_put(index, ref_kind, method_index); 167 } else if (tag == JVM_CONSTANT_MethodType) { 168 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 169 u2 signature_index = cfs->get_u2_fast(); 170 cp->method_type_index_at_put(index, signature_index); 171 } else { 172 ShouldNotReachHere(); 173 } 174 break; 175 case JVM_CONSTANT_InvokeDynamic : 176 { 177 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 178 classfile_parse_error( 179 "Class file version does not support constant tag %u in class file %s", 180 tag, CHECK); 181 } 182 if (!EnableInvokeDynamic) { 183 classfile_parse_error( 184 "This JVM does not support constant tag %u in class file %s", 185 tag, CHECK); 186 } 187 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 188 u2 bootstrap_specifier_index = cfs->get_u2_fast(); 189 u2 name_and_type_index = cfs->get_u2_fast(); 190 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) 191 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 192 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 193 } 194 break; 195 case JVM_CONSTANT_Integer : 196 { 197 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 198 u4 bytes = cfs->get_u4_fast(); 199 cp->int_at_put(index, (jint) bytes); 200 } 201 break; 202 case JVM_CONSTANT_Float : 203 { 204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 205 u4 bytes = cfs->get_u4_fast(); 206 cp->float_at_put(index, *(jfloat*)&bytes); 207 } 208 break; 209 case JVM_CONSTANT_Long : 210 // A mangled type might cause you to overrun allocated memory 211 guarantee_property(index+1 < length, 212 "Invalid constant pool entry %u in class file %s", 213 index, CHECK); 214 { 215 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 216 u8 bytes = cfs->get_u8_fast(); 217 cp->long_at_put(index, bytes); 218 } 219 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 220 break; 221 case JVM_CONSTANT_Double : 222 // A mangled type might cause you to overrun allocated memory 223 guarantee_property(index+1 < length, 224 "Invalid constant pool entry %u in class file %s", 225 index, CHECK); 226 { 227 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 228 u8 bytes = cfs->get_u8_fast(); 229 cp->double_at_put(index, *(jdouble*)&bytes); 230 } 231 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 232 break; 233 case JVM_CONSTANT_NameAndType : 234 { 235 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 236 u2 name_index = cfs->get_u2_fast(); 237 u2 signature_index = cfs->get_u2_fast(); 238 cp->name_and_type_at_put(index, name_index, signature_index); 239 } 240 break; 241 case JVM_CONSTANT_Utf8 : 242 { 243 cfs->guarantee_more(2, CHECK); // utf8_length 244 u2 utf8_length = cfs->get_u2_fast(); 245 u1* utf8_buffer = cfs->get_u1_buffer(); 246 assert(utf8_buffer != NULL, "null utf8 buffer"); 247 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 248 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 249 cfs->skip_u1_fast(utf8_length); 250 251 // Before storing the symbol, make sure it's legal 252 if (_need_verify) { 253 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); 254 } 255 256 if (EnableInvokeDynamic && has_cp_patch_at(index)) { 257 Handle patch = clear_cp_patch_at(index); 258 guarantee_property(java_lang_String::is_instance(patch()), 259 "Illegal utf8 patch at %d in class file %s", 260 index, CHECK); 261 char* str = java_lang_String::as_utf8_string(patch()); 262 // (could use java_lang_String::as_symbol instead, but might as well batch them) 263 utf8_buffer = (u1*) str; 264 utf8_length = (int) strlen(str); 265 } 266 267 unsigned int hash; 268 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); 269 if (result == NULL) { 270 names[names_count] = (char*)utf8_buffer; 271 lengths[names_count] = utf8_length; 272 indices[names_count] = index; 273 hashValues[names_count++] = hash; 274 if (names_count == SymbolTable::symbol_alloc_batch_size) { 275 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK); 276 names_count = 0; 277 } 278 } else { 279 cp->symbol_at_put(index, result); 280 } 281 } 282 break; 283 default: 284 classfile_parse_error( 285 "Unknown constant tag %u in class file %s", tag, CHECK); 286 break; 287 } 288 } 289 290 // Allocate the remaining symbols 291 if (names_count > 0) { 292 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK); 293 } 294 295 // Copy _current pointer of local copy back to stream(). 296#ifdef ASSERT 297 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); 298#endif 299 cfs0->set_current(cfs1.current()); 300} 301 302// This class unreferences constant pool symbols if an error has occurred 303// while parsing the class before it is assigned into the class. 304// If it gets an error after that it is unloaded and the constant pool will 305// be cleaned up then. 306class ConstantPoolCleaner : public StackObj { 307 constantPoolHandle _cphandle; 308 bool _in_error; 309 public: 310 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {} 311 ~ConstantPoolCleaner() { 312 if (_in_error && _cphandle.not_null()) { 313 _cphandle->unreference_symbols(); 314 } 315 } 316 void set_in_error(bool clean) { _in_error = clean; } 317}; 318 319bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } 320 321constantPoolHandle ClassFileParser::parse_constant_pool(Handle class_loader, TRAPS) { 322 ClassFileStream* cfs = stream(); 323 constantPoolHandle nullHandle; 324 325 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag 326 u2 length = cfs->get_u2_fast(); 327 guarantee_property( 328 length >= 1, "Illegal constant pool size %u in class file %s", 329 length, CHECK_(nullHandle)); 330 constantPoolOop constant_pool = 331 oopFactory::new_constantPool(length, 332 oopDesc::IsSafeConc, 333 CHECK_(nullHandle)); 334 constantPoolHandle cp (THREAD, constant_pool); 335 336 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops 337 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up. 338 339 // parsing constant pool entries 340 parse_constant_pool_entries(class_loader, cp, length, CHECK_(nullHandle)); 341 342 int index = 1; // declared outside of loops for portability 343 344 // first verification pass - validate cross references and fixup class and string constants 345 for (index = 1; index < length; index++) { // Index 0 is unused 346 jbyte tag = cp->tag_at(index).value(); 347 switch (tag) { 348 case JVM_CONSTANT_Class : 349 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 350 break; 351 case JVM_CONSTANT_Fieldref : 352 // fall through 353 case JVM_CONSTANT_Methodref : 354 // fall through 355 case JVM_CONSTANT_InterfaceMethodref : { 356 if (!_need_verify) break; 357 int klass_ref_index = cp->klass_ref_index_at(index); 358 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 359 check_property(valid_cp_range(klass_ref_index, length) && 360 is_klass_reference(cp, klass_ref_index), 361 "Invalid constant pool index %u in class file %s", 362 klass_ref_index, 363 CHECK_(nullHandle)); 364 check_property(valid_cp_range(name_and_type_ref_index, length) && 365 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 366 "Invalid constant pool index %u in class file %s", 367 name_and_type_ref_index, 368 CHECK_(nullHandle)); 369 break; 370 } 371 case JVM_CONSTANT_String : 372 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 373 break; 374 case JVM_CONSTANT_Integer : 375 break; 376 case JVM_CONSTANT_Float : 377 break; 378 case JVM_CONSTANT_Long : 379 case JVM_CONSTANT_Double : 380 index++; 381 check_property( 382 (index < length && cp->tag_at(index).is_invalid()), 383 "Improper constant pool long/double index %u in class file %s", 384 index, CHECK_(nullHandle)); 385 break; 386 case JVM_CONSTANT_NameAndType : { 387 if (!_need_verify) break; 388 int name_ref_index = cp->name_ref_index_at(index); 389 int signature_ref_index = cp->signature_ref_index_at(index); 390 check_property( 391 valid_cp_range(name_ref_index, length) && 392 cp->tag_at(name_ref_index).is_utf8(), 393 "Invalid constant pool index %u in class file %s", 394 name_ref_index, CHECK_(nullHandle)); 395 check_property( 396 valid_cp_range(signature_ref_index, length) && 397 cp->tag_at(signature_ref_index).is_utf8(), 398 "Invalid constant pool index %u in class file %s", 399 signature_ref_index, CHECK_(nullHandle)); 400 break; 401 } 402 case JVM_CONSTANT_Utf8 : 403 break; 404 case JVM_CONSTANT_UnresolvedClass : // fall-through 405 case JVM_CONSTANT_UnresolvedClassInError: 406 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 407 break; 408 case JVM_CONSTANT_ClassIndex : 409 { 410 int class_index = cp->klass_index_at(index); 411 check_property( 412 valid_cp_range(class_index, length) && 413 cp->tag_at(class_index).is_utf8(), 414 "Invalid constant pool index %u in class file %s", 415 class_index, CHECK_(nullHandle)); 416 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); 417 } 418 break; 419 case JVM_CONSTANT_UnresolvedString : 420 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 421 break; 422 case JVM_CONSTANT_StringIndex : 423 { 424 int string_index = cp->string_index_at(index); 425 check_property( 426 valid_cp_range(string_index, length) && 427 cp->tag_at(string_index).is_utf8(), 428 "Invalid constant pool index %u in class file %s", 429 string_index, CHECK_(nullHandle)); 430 Symbol* sym = cp->symbol_at(string_index); 431 cp->unresolved_string_at_put(index, sym); 432 } 433 break; 434 case JVM_CONSTANT_MethodHandle : 435 { 436 int ref_index = cp->method_handle_index_at(index); 437 check_property( 438 valid_cp_range(ref_index, length) && 439 EnableInvokeDynamic, 440 "Invalid constant pool index %u in class file %s", 441 ref_index, CHECK_(nullHandle)); 442 constantTag tag = cp->tag_at(ref_index); 443 int ref_kind = cp->method_handle_ref_kind_at(index); 444 switch (ref_kind) { 445 case JVM_REF_getField: 446 case JVM_REF_getStatic: 447 case JVM_REF_putField: 448 case JVM_REF_putStatic: 449 check_property( 450 tag.is_field(), 451 "Invalid constant pool index %u in class file %s (not a field)", 452 ref_index, CHECK_(nullHandle)); 453 break; 454 case JVM_REF_invokeVirtual: 455 case JVM_REF_invokeStatic: 456 case JVM_REF_invokeSpecial: 457 case JVM_REF_newInvokeSpecial: 458 check_property( 459 tag.is_method(), 460 "Invalid constant pool index %u in class file %s (not a method)", 461 ref_index, CHECK_(nullHandle)); 462 break; 463 case JVM_REF_invokeInterface: 464 check_property( 465 tag.is_interface_method(), 466 "Invalid constant pool index %u in class file %s (not an interface method)", 467 ref_index, CHECK_(nullHandle)); 468 break; 469 default: 470 classfile_parse_error( 471 "Bad method handle kind at constant pool index %u in class file %s", 472 index, CHECK_(nullHandle)); 473 } 474 // Keep the ref_index unchanged. It will be indirected at link-time. 475 } 476 break; 477 case JVM_CONSTANT_MethodType : 478 { 479 int ref_index = cp->method_type_index_at(index); 480 check_property( 481 valid_cp_range(ref_index, length) && 482 cp->tag_at(ref_index).is_utf8() && 483 EnableInvokeDynamic, 484 "Invalid constant pool index %u in class file %s", 485 ref_index, CHECK_(nullHandle)); 486 } 487 break; 488 case JVM_CONSTANT_InvokeDynamic : 489 { 490 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index); 491 check_property(valid_cp_range(name_and_type_ref_index, length) && 492 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 493 "Invalid constant pool index %u in class file %s", 494 name_and_type_ref_index, 495 CHECK_(nullHandle)); 496 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available 497 break; 498 } 499 default: 500 fatal(err_msg("bad constant pool tag value %u", 501 cp->tag_at(index).value())); 502 ShouldNotReachHere(); 503 break; 504 } // end of switch 505 } // end of for 506 507 if (_cp_patches != NULL) { 508 // need to treat this_class specially... 509 assert(EnableInvokeDynamic, ""); 510 int this_class_index; 511 { 512 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len 513 u1* mark = cfs->current(); 514 u2 flags = cfs->get_u2_fast(); 515 this_class_index = cfs->get_u2_fast(); 516 cfs->set_current(mark); // revert to mark 517 } 518 519 for (index = 1; index < length; index++) { // Index 0 is unused 520 if (has_cp_patch_at(index)) { 521 guarantee_property(index != this_class_index, 522 "Illegal constant pool patch to self at %d in class file %s", 523 index, CHECK_(nullHandle)); 524 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); 525 } 526 } 527 // Ensure that all the patches have been used. 528 for (index = 0; index < _cp_patches->length(); index++) { 529 guarantee_property(!has_cp_patch_at(index), 530 "Unused constant pool patch at %d in class file %s", 531 index, CHECK_(nullHandle)); 532 } 533 } 534 535 if (!_need_verify) { 536 cp_in_error.set_in_error(false); 537 return cp; 538 } 539 540 // second verification pass - checks the strings are of the right format. 541 // but not yet to the other entries 542 for (index = 1; index < length; index++) { 543 jbyte tag = cp->tag_at(index).value(); 544 switch (tag) { 545 case JVM_CONSTANT_UnresolvedClass: { 546 Symbol* class_name = cp->unresolved_klass_at(index); 547 // check the name, even if _cp_patches will overwrite it 548 verify_legal_class_name(class_name, CHECK_(nullHandle)); 549 break; 550 } 551 case JVM_CONSTANT_NameAndType: { 552 if (_need_verify && _major_version >= JAVA_7_VERSION) { 553 int sig_index = cp->signature_ref_index_at(index); 554 int name_index = cp->name_ref_index_at(index); 555 Symbol* name = cp->symbol_at(name_index); 556 Symbol* sig = cp->symbol_at(sig_index); 557 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 558 verify_legal_method_signature(name, sig, CHECK_(nullHandle)); 559 } else { 560 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); 561 } 562 } 563 break; 564 } 565 case JVM_CONSTANT_InvokeDynamic: 566 case JVM_CONSTANT_Fieldref: 567 case JVM_CONSTANT_Methodref: 568 case JVM_CONSTANT_InterfaceMethodref: { 569 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 570 // already verified to be utf8 571 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); 572 // already verified to be utf8 573 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); 574 Symbol* name = cp->symbol_at(name_ref_index); 575 Symbol* signature = cp->symbol_at(signature_ref_index); 576 if (tag == JVM_CONSTANT_Fieldref) { 577 verify_legal_field_name(name, CHECK_(nullHandle)); 578 if (_need_verify && _major_version >= JAVA_7_VERSION) { 579 // Signature is verified above, when iterating NameAndType_info. 580 // Need only to be sure it's the right type. 581 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 582 throwIllegalSignature( 583 "Field", name, signature, CHECK_(nullHandle)); 584 } 585 } else { 586 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); 587 } 588 } else { 589 verify_legal_method_name(name, CHECK_(nullHandle)); 590 if (_need_verify && _major_version >= JAVA_7_VERSION) { 591 // Signature is verified above, when iterating NameAndType_info. 592 // Need only to be sure it's the right type. 593 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 594 throwIllegalSignature( 595 "Method", name, signature, CHECK_(nullHandle)); 596 } 597 } else { 598 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); 599 } 600 if (tag == JVM_CONSTANT_Methodref) { 601 // 4509014: If a class method name begins with '<', it must be "<init>". 602 assert(name != NULL, "method name in constant pool is null"); 603 unsigned int name_len = name->utf8_length(); 604 assert(name_len > 0, "bad method name"); // already verified as legal name 605 if (name->byte_at(0) == '<') { 606 if (name != vmSymbols::object_initializer_name()) { 607 classfile_parse_error( 608 "Bad method name at constant pool index %u in class file %s", 609 name_ref_index, CHECK_(nullHandle)); 610 } 611 } 612 } 613 } 614 break; 615 } 616 case JVM_CONSTANT_MethodHandle: { 617 int ref_index = cp->method_handle_index_at(index); 618 int ref_kind = cp->method_handle_ref_kind_at(index); 619 switch (ref_kind) { 620 case JVM_REF_invokeVirtual: 621 case JVM_REF_invokeStatic: 622 case JVM_REF_invokeSpecial: 623 case JVM_REF_newInvokeSpecial: 624 { 625 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); 626 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); 627 Symbol* name = cp->symbol_at(name_ref_index); 628 if (ref_kind == JVM_REF_newInvokeSpecial) { 629 if (name != vmSymbols::object_initializer_name()) { 630 classfile_parse_error( 631 "Bad constructor name at constant pool index %u in class file %s", 632 name_ref_index, CHECK_(nullHandle)); 633 } 634 } else { 635 if (name == vmSymbols::object_initializer_name()) { 636 classfile_parse_error( 637 "Bad method name at constant pool index %u in class file %s", 638 name_ref_index, CHECK_(nullHandle)); 639 } 640 } 641 } 642 break; 643 // Other ref_kinds are already fully checked in previous pass. 644 } 645 break; 646 } 647 case JVM_CONSTANT_MethodType: { 648 Symbol* no_name = vmSymbols::type_name(); // place holder 649 Symbol* signature = cp->method_type_signature_at(index); 650 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); 651 break; 652 } 653 case JVM_CONSTANT_Utf8: { 654 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 655 } 656 } // end of switch 657 } // end of for 658 659 cp_in_error.set_in_error(false); 660 return cp; 661} 662 663 664void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { 665 assert(EnableInvokeDynamic, ""); 666 BasicType patch_type = T_VOID; 667 switch (cp->tag_at(index).value()) { 668 669 case JVM_CONSTANT_UnresolvedClass : 670 // Patching a class means pre-resolving it. 671 // The name in the constant pool is ignored. 672 if (java_lang_Class::is_instance(patch())) { 673 guarantee_property(!java_lang_Class::is_primitive(patch()), 674 "Illegal class patch at %d in class file %s", 675 index, CHECK); 676 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); 677 } else { 678 guarantee_property(java_lang_String::is_instance(patch()), 679 "Illegal class patch at %d in class file %s", 680 index, CHECK); 681 Symbol* name = java_lang_String::as_symbol(patch(), CHECK); 682 cp->unresolved_klass_at_put(index, name); 683 } 684 break; 685 686 case JVM_CONSTANT_UnresolvedString : 687 // Patching a string means pre-resolving it. 688 // The spelling in the constant pool is ignored. 689 // The constant reference may be any object whatever. 690 // If it is not a real interned string, the constant is referred 691 // to as a "pseudo-string", and must be presented to the CP 692 // explicitly, because it may require scavenging. 693 cp->pseudo_string_at_put(index, patch()); 694 break; 695 696 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; 697 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; 698 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; 699 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; 700 patch_prim: 701 { 702 jvalue value; 703 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 704 guarantee_property(value_type == patch_type, 705 "Illegal primitive patch at %d in class file %s", 706 index, CHECK); 707 switch (value_type) { 708 case T_INT: cp->int_at_put(index, value.i); break; 709 case T_FLOAT: cp->float_at_put(index, value.f); break; 710 case T_LONG: cp->long_at_put(index, value.j); break; 711 case T_DOUBLE: cp->double_at_put(index, value.d); break; 712 default: assert(false, ""); 713 } 714 } 715 break; 716 717 default: 718 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 719 guarantee_property(!has_cp_patch_at(index), 720 "Illegal unexpected patch at %d in class file %s", 721 index, CHECK); 722 return; 723 } 724 725 // On fall-through, mark the patch as used. 726 clear_cp_patch_at(index); 727} 728 729 730 731class NameSigHash: public ResourceObj { 732 public: 733 Symbol* _name; // name 734 Symbol* _sig; // signature 735 NameSigHash* _next; // Next entry in hash table 736}; 737 738 739#define HASH_ROW_SIZE 256 740 741unsigned int hash(Symbol* name, Symbol* sig) { 742 unsigned int raw_hash = 0; 743 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 744 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 745 746 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 747} 748 749 750void initialize_hashtable(NameSigHash** table) { 751 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 752} 753 754// Return false if the name/sig combination is found in table. 755// Return true if no duplicate is found. And name/sig is added as a new entry in table. 756// The old format checker uses heap sort to find duplicates. 757// NOTE: caller should guarantee that GC doesn't happen during the life cycle 758// of table since we don't expect Symbol*'s to move. 759bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) { 760 assert(name != NULL, "name in constant pool is NULL"); 761 762 // First lookup for duplicates 763 int index = hash(name, sig); 764 NameSigHash* entry = table[index]; 765 while (entry != NULL) { 766 if (entry->_name == name && entry->_sig == sig) { 767 return false; 768 } 769 entry = entry->_next; 770 } 771 772 // No duplicate is found, allocate a new entry and fill it. 773 entry = new NameSigHash(); 774 entry->_name = name; 775 entry->_sig = sig; 776 777 // Insert into hash table 778 entry->_next = table[index]; 779 table[index] = entry; 780 781 return true; 782} 783 784 785objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, 786 int length, 787 Handle class_loader, 788 Handle protection_domain, 789 Symbol* class_name, 790 TRAPS) { 791 ClassFileStream* cfs = stream(); 792 assert(length > 0, "only called for length>0"); 793 objArrayHandle nullHandle; 794 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 795 objArrayHandle interfaces (THREAD, interface_oop); 796 797 int index; 798 for (index = 0; index < length; index++) { 799 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); 800 KlassHandle interf; 801 check_property( 802 valid_cp_range(interface_index, cp->length()) && 803 is_klass_reference(cp, interface_index), 804 "Interface name has bad constant pool index %u in class file %s", 805 interface_index, CHECK_(nullHandle)); 806 if (cp->tag_at(interface_index).is_klass()) { 807 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); 808 } else { 809 Symbol* unresolved_klass = cp->klass_name_at(interface_index); 810 811 // Don't need to check legal name because it's checked when parsing constant pool. 812 // But need to make sure it's not an array type. 813 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 814 "Bad interface name in class file %s", CHECK_(nullHandle)); 815 816 // Call resolve_super so classcircularity is checked 817 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, 818 unresolved_klass, class_loader, protection_domain, 819 false, CHECK_(nullHandle)); 820 interf = KlassHandle(THREAD, k); 821 822 if (LinkWellKnownClasses) // my super type is well known to me 823 cp->klass_at_put(interface_index, interf()); // eagerly resolve 824 } 825 826 if (!Klass::cast(interf())->is_interface()) { 827 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); 828 } 829 interfaces->obj_at_put(index, interf()); 830 } 831 832 if (!_need_verify || length <= 1) { 833 return interfaces; 834 } 835 836 // Check if there's any duplicates in interfaces 837 ResourceMark rm(THREAD); 838 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( 839 THREAD, NameSigHash*, HASH_ROW_SIZE); 840 initialize_hashtable(interface_names); 841 bool dup = false; 842 { 843 debug_only(No_Safepoint_Verifier nsv;) 844 for (index = 0; index < length; index++) { 845 klassOop k = (klassOop)interfaces->obj_at(index); 846 Symbol* name = instanceKlass::cast(k)->name(); 847 // If no duplicates, add (name, NULL) in hashtable interface_names. 848 if (!put_after_lookup(name, NULL, interface_names)) { 849 dup = true; 850 break; 851 } 852 } 853 } 854 if (dup) { 855 classfile_parse_error("Duplicate interface name in class file %s", 856 CHECK_(nullHandle)); 857 } 858 859 return interfaces; 860} 861 862 863void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { 864 // Make sure the constant pool entry is of a type appropriate to this field 865 guarantee_property( 866 (constantvalue_index > 0 && 867 constantvalue_index < cp->length()), 868 "Bad initial value index %u in ConstantValue attribute in class file %s", 869 constantvalue_index, CHECK); 870 constantTag value_type = cp->tag_at(constantvalue_index); 871 switch ( cp->basic_type_for_signature_at(signature_index) ) { 872 case T_LONG: 873 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); 874 break; 875 case T_FLOAT: 876 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); 877 break; 878 case T_DOUBLE: 879 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); 880 break; 881 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: 882 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); 883 break; 884 case T_OBJECT: 885 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 886 && (value_type.is_string() || value_type.is_unresolved_string())), 887 "Bad string initial value in class file %s", CHECK); 888 break; 889 default: 890 classfile_parse_error( 891 "Unable to set initial value %u in class file %s", 892 constantvalue_index, CHECK); 893 } 894} 895 896 897// Parse attributes for a field. 898void ClassFileParser::parse_field_attributes(constantPoolHandle cp, 899 u2 attributes_count, 900 bool is_static, u2 signature_index, 901 u2* constantvalue_index_addr, 902 bool* is_synthetic_addr, 903 u2* generic_signature_index_addr, 904 typeArrayHandle* field_annotations, 905 TRAPS) { 906 ClassFileStream* cfs = stream(); 907 assert(attributes_count > 0, "length should be greater than 0"); 908 u2 constantvalue_index = 0; 909 u2 generic_signature_index = 0; 910 bool is_synthetic = false; 911 u1* runtime_visible_annotations = NULL; 912 int runtime_visible_annotations_length = 0; 913 u1* runtime_invisible_annotations = NULL; 914 int runtime_invisible_annotations_length = 0; 915 while (attributes_count--) { 916 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 917 u2 attribute_name_index = cfs->get_u2_fast(); 918 u4 attribute_length = cfs->get_u4_fast(); 919 check_property(valid_cp_range(attribute_name_index, cp->length()) && 920 cp->tag_at(attribute_name_index).is_utf8(), 921 "Invalid field attribute index %u in class file %s", 922 attribute_name_index, 923 CHECK); 924 Symbol* attribute_name = cp->symbol_at(attribute_name_index); 925 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 926 // ignore if non-static 927 if (constantvalue_index != 0) { 928 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 929 } 930 check_property( 931 attribute_length == 2, 932 "Invalid ConstantValue field attribute length %u in class file %s", 933 attribute_length, CHECK); 934 constantvalue_index = cfs->get_u2(CHECK); 935 if (_need_verify) { 936 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); 937 } 938 } else if (attribute_name == vmSymbols::tag_synthetic()) { 939 if (attribute_length != 0) { 940 classfile_parse_error( 941 "Invalid Synthetic field attribute length %u in class file %s", 942 attribute_length, CHECK); 943 } 944 is_synthetic = true; 945 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 946 if (attribute_length != 0) { 947 classfile_parse_error( 948 "Invalid Deprecated field attribute length %u in class file %s", 949 attribute_length, CHECK); 950 } 951 } else if (_major_version >= JAVA_1_5_VERSION) { 952 if (attribute_name == vmSymbols::tag_signature()) { 953 if (attribute_length != 2) { 954 classfile_parse_error( 955 "Wrong size %u for field's Signature attribute in class file %s", 956 attribute_length, CHECK); 957 } 958 generic_signature_index = cfs->get_u2(CHECK); 959 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 960 runtime_visible_annotations_length = attribute_length; 961 runtime_visible_annotations = cfs->get_u1_buffer(); 962 assert(runtime_visible_annotations != NULL, "null visible annotations"); 963 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 964 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 965 runtime_invisible_annotations_length = attribute_length; 966 runtime_invisible_annotations = cfs->get_u1_buffer(); 967 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 968 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); 969 } else { 970 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 971 } 972 } else { 973 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 974 } 975 } 976 977 *constantvalue_index_addr = constantvalue_index; 978 *is_synthetic_addr = is_synthetic; 979 *generic_signature_index_addr = generic_signature_index; 980 *field_annotations = assemble_annotations(runtime_visible_annotations, 981 runtime_visible_annotations_length, 982 runtime_invisible_annotations, 983 runtime_invisible_annotations_length, 984 CHECK); 985 return; 986} 987 988 989// Field allocation types. Used for computing field offsets. 990 991enum FieldAllocationType { 992 STATIC_OOP, // Oops 993 STATIC_BYTE, // Boolean, Byte, char 994 STATIC_SHORT, // shorts 995 STATIC_WORD, // ints 996 STATIC_DOUBLE, // aligned long or double 997 NONSTATIC_OOP, 998 NONSTATIC_BYTE, 999 NONSTATIC_SHORT, 1000 NONSTATIC_WORD, 1001 NONSTATIC_DOUBLE, 1002 MAX_FIELD_ALLOCATION_TYPE, 1003 BAD_ALLOCATION_TYPE = -1 1004}; 1005 1006static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1007 BAD_ALLOCATION_TYPE, // 0 1008 BAD_ALLOCATION_TYPE, // 1 1009 BAD_ALLOCATION_TYPE, // 2 1010 BAD_ALLOCATION_TYPE, // 3 1011 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1012 NONSTATIC_SHORT, // T_CHAR = 5, 1013 NONSTATIC_WORD, // T_FLOAT = 6, 1014 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1015 NONSTATIC_BYTE, // T_BYTE = 8, 1016 NONSTATIC_SHORT, // T_SHORT = 9, 1017 NONSTATIC_WORD, // T_INT = 10, 1018 NONSTATIC_DOUBLE, // T_LONG = 11, 1019 NONSTATIC_OOP, // T_OBJECT = 12, 1020 NONSTATIC_OOP, // T_ARRAY = 13, 1021 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1022 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1023 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16, 1024 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17, 1025 BAD_ALLOCATION_TYPE, // 0 1026 BAD_ALLOCATION_TYPE, // 1 1027 BAD_ALLOCATION_TYPE, // 2 1028 BAD_ALLOCATION_TYPE, // 3 1029 STATIC_BYTE , // T_BOOLEAN = 4, 1030 STATIC_SHORT, // T_CHAR = 5, 1031 STATIC_WORD, // T_FLOAT = 6, 1032 STATIC_DOUBLE, // T_DOUBLE = 7, 1033 STATIC_BYTE, // T_BYTE = 8, 1034 STATIC_SHORT, // T_SHORT = 9, 1035 STATIC_WORD, // T_INT = 10, 1036 STATIC_DOUBLE, // T_LONG = 11, 1037 STATIC_OOP, // T_OBJECT = 12, 1038 STATIC_OOP, // T_ARRAY = 13, 1039 BAD_ALLOCATION_TYPE, // T_VOID = 14, 1040 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, 1041 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16, 1042 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17, 1043}; 1044 1045static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1046 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1047 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1048 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1049 return result; 1050} 1051 1052class FieldAllocationCount: public ResourceObj { 1053 public: 1054 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1055 1056 FieldAllocationCount() { 1057 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1058 count[i] = 0; 1059 } 1060 } 1061 1062 FieldAllocationType update(bool is_static, BasicType type) { 1063 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1064 // Make sure there is no overflow with injected fields. 1065 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1066 count[atype]++; 1067 return atype; 1068 } 1069}; 1070 1071 1072typeArrayHandle ClassFileParser::parse_fields(Symbol* class_name, 1073 constantPoolHandle cp, bool is_interface, 1074 FieldAllocationCount *fac, 1075 objArrayHandle* fields_annotations, 1076 u2* java_fields_count_ptr, TRAPS) { 1077 ClassFileStream* cfs = stream(); 1078 typeArrayHandle nullHandle; 1079 cfs->guarantee_more(2, CHECK_(nullHandle)); // length 1080 u2 length = cfs->get_u2_fast(); 1081 *java_fields_count_ptr = length; 1082 1083 int num_injected = 0; 1084 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected); 1085 int total_fields = length + num_injected; 1086 1087 // The field array starts with tuples of shorts 1088 // [access, name index, sig index, initial value index, byte offset]. 1089 // A generic signature slot only exists for field with generic 1090 // signature attribute. And the access flag is set with 1091 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1092 // signature slots are at the end of the field array and after all 1093 // other fields data. 1094 // 1095 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1096 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1097 // ... 1098 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1099 // [generic signature index] 1100 // [generic signature index] 1101 // ... 1102 // 1103 // Allocate a temporary resource array for field data. For each field, 1104 // a slot is reserved in the temporary array for the generic signature 1105 // index. After parsing all fields, the data are copied to a permanent 1106 // array and any unused slots will be discarded. 1107 ResourceMark rm(THREAD); 1108 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD( 1109 THREAD, u2, total_fields * (FieldInfo::field_slots + 1)); 1110 1111 typeArrayHandle field_annotations; 1112 // The generic signature slots start after all other fields' data. 1113 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1114 int num_generic_signature = 0; 1115 for (int n = 0; n < length; n++) { 1116 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count 1117 1118 AccessFlags access_flags; 1119 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1120 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); 1121 access_flags.set_flags(flags); 1122 1123 u2 name_index = cfs->get_u2_fast(); 1124 int cp_size = cp->length(); 1125 check_property( 1126 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), 1127 "Invalid constant pool index %u for field name in class file %s", 1128 name_index, CHECK_(nullHandle)); 1129 Symbol* name = cp->symbol_at(name_index); 1130 verify_legal_field_name(name, CHECK_(nullHandle)); 1131 1132 u2 signature_index = cfs->get_u2_fast(); 1133 check_property( 1134 valid_cp_range(signature_index, cp_size) && 1135 cp->tag_at(signature_index).is_utf8(), 1136 "Invalid constant pool index %u for field signature in class file %s", 1137 signature_index, CHECK_(nullHandle)); 1138 Symbol* sig = cp->symbol_at(signature_index); 1139 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); 1140 1141 u2 constantvalue_index = 0; 1142 bool is_synthetic = false; 1143 u2 generic_signature_index = 0; 1144 bool is_static = access_flags.is_static(); 1145 1146 u2 attributes_count = cfs->get_u2_fast(); 1147 if (attributes_count > 0) { 1148 parse_field_attributes(cp, attributes_count, is_static, signature_index, 1149 &constantvalue_index, &is_synthetic, 1150 &generic_signature_index, &field_annotations, 1151 CHECK_(nullHandle)); 1152 if (field_annotations.not_null()) { 1153 if (fields_annotations->is_null()) { 1154 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 1155 *fields_annotations = objArrayHandle(THREAD, md); 1156 } 1157 (*fields_annotations)->obj_at_put(n, field_annotations()); 1158 } 1159 if (is_synthetic) { 1160 access_flags.set_is_synthetic(); 1161 } 1162 if (generic_signature_index != 0) { 1163 access_flags.set_field_has_generic_signature(); 1164 fa[generic_signature_slot] = generic_signature_index; 1165 generic_signature_slot ++; 1166 num_generic_signature ++; 1167 } 1168 } 1169 1170 FieldInfo* field = FieldInfo::from_field_array(fa, n); 1171 field->initialize(access_flags.as_short(), 1172 name_index, 1173 signature_index, 1174 constantvalue_index, 1175 0); 1176 1177 BasicType type = cp->basic_type_for_signature_at(signature_index); 1178 1179 // Remember how many oops we encountered and compute allocation type 1180 FieldAllocationType atype = fac->update(is_static, type); 1181 1182 // The correct offset is computed later (all oop fields will be located together) 1183 // We temporarily store the allocation type in the offset field 1184 field->set_offset(atype); 1185 } 1186 1187 int index = length; 1188 if (num_injected != 0) { 1189 for (int n = 0; n < num_injected; n++) { 1190 // Check for duplicates 1191 if (injected[n].may_be_java) { 1192 Symbol* name = injected[n].name(); 1193 Symbol* signature = injected[n].signature(); 1194 bool duplicate = false; 1195 for (int i = 0; i < length; i++) { 1196 FieldInfo* f = FieldInfo::from_field_array(fa, i); 1197 if (name == cp->symbol_at(f->name_index()) && 1198 signature == cp->symbol_at(f->signature_index())) { 1199 // Symbol is desclared in Java so skip this one 1200 duplicate = true; 1201 break; 1202 } 1203 } 1204 if (duplicate) { 1205 // These will be removed from the field array at the end 1206 continue; 1207 } 1208 } 1209 1210 // Injected field 1211 FieldInfo* field = FieldInfo::from_field_array(fa, index); 1212 field->initialize(JVM_ACC_FIELD_INTERNAL, 1213 injected[n].name_index, 1214 injected[n].signature_index, 1215 0, 1216 0); 1217 1218 BasicType type = FieldType::basic_type(injected[n].signature()); 1219 1220 // Remember how many oops we encountered and compute allocation type 1221 FieldAllocationType atype = fac->update(false, type); 1222 1223 // The correct offset is computed later (all oop fields will be located together) 1224 // We temporarily store the allocation type in the offset field 1225 field->set_offset(atype); 1226 index++; 1227 } 1228 } 1229 1230 // Now copy the fields' data from the temporary resource array. 1231 // Sometimes injected fields already exist in the Java source so 1232 // the fields array could be too long. In that case the 1233 // fields array is trimed. Also unused slots that were reserved 1234 // for generic signature indexes are discarded. 1235 typeArrayOop new_fields = oopFactory::new_permanent_shortArray( 1236 index * FieldInfo::field_slots + num_generic_signature, 1237 CHECK_(nullHandle)); 1238 typeArrayHandle fields(THREAD, new_fields); 1239 { 1240 int i = 0; 1241 for (; i < index * FieldInfo::field_slots; i++) { 1242 new_fields->short_at_put(i, fa[i]); 1243 } 1244 for (int j = total_fields * FieldInfo::field_slots; 1245 j < generic_signature_slot; j++) { 1246 new_fields->short_at_put(i++, fa[j]); 1247 } 1248 assert(i == new_fields->length(), ""); 1249 } 1250 1251 if (_need_verify && length > 1) { 1252 // Check duplicated fields 1253 ResourceMark rm(THREAD); 1254 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1255 THREAD, NameSigHash*, HASH_ROW_SIZE); 1256 initialize_hashtable(names_and_sigs); 1257 bool dup = false; 1258 { 1259 debug_only(No_Safepoint_Verifier nsv;) 1260 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 1261 Symbol* name = fs.name(); 1262 Symbol* sig = fs.signature(); 1263 // If no duplicates, add name/signature in hashtable names_and_sigs. 1264 if (!put_after_lookup(name, sig, names_and_sigs)) { 1265 dup = true; 1266 break; 1267 } 1268 } 1269 } 1270 if (dup) { 1271 classfile_parse_error("Duplicate field name&signature in class file %s", 1272 CHECK_(nullHandle)); 1273 } 1274 } 1275 1276 return fields; 1277} 1278 1279 1280static void copy_u2_with_conversion(u2* dest, u2* src, int length) { 1281 while (length-- > 0) { 1282 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1283 } 1284} 1285 1286 1287typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, 1288 u4 exception_table_length, 1289 constantPoolHandle cp, 1290 TRAPS) { 1291 ClassFileStream* cfs = stream(); 1292 typeArrayHandle nullHandle; 1293 1294 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] 1295 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); 1296 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); 1297 1298 int index = 0; 1299 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index 1300 for (unsigned int i = 0; i < exception_table_length; i++) { 1301 u2 start_pc = cfs->get_u2_fast(); 1302 u2 end_pc = cfs->get_u2_fast(); 1303 u2 handler_pc = cfs->get_u2_fast(); 1304 u2 catch_type_index = cfs->get_u2_fast(); 1305 // Will check legal target after parsing code array in verifier. 1306 if (_need_verify) { 1307 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1308 "Illegal exception table range in class file %s", CHECK_(nullHandle)); 1309 guarantee_property(handler_pc < code_length, 1310 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); 1311 if (catch_type_index != 0) { 1312 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && 1313 is_klass_reference(cp, catch_type_index), 1314 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); 1315 } 1316 } 1317 exception_handlers->int_at_put(index++, start_pc); 1318 exception_handlers->int_at_put(index++, end_pc); 1319 exception_handlers->int_at_put(index++, handler_pc); 1320 exception_handlers->int_at_put(index++, catch_type_index); 1321 } 1322 return exception_handlers; 1323} 1324 1325void ClassFileParser::parse_linenumber_table( 1326 u4 code_attribute_length, u4 code_length, 1327 CompressedLineNumberWriteStream** write_stream, TRAPS) { 1328 ClassFileStream* cfs = stream(); 1329 unsigned int num_entries = cfs->get_u2(CHECK); 1330 1331 // Each entry is a u2 start_pc, and a u2 line_number 1332 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); 1333 1334 // Verify line number attribute and table length 1335 check_property( 1336 code_attribute_length == sizeof(u2) + length_in_bytes, 1337 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1338 1339 cfs->guarantee_more(length_in_bytes, CHECK); 1340 1341 if ((*write_stream) == NULL) { 1342 if (length_in_bytes > fixed_buffer_size) { 1343 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1344 } else { 1345 (*write_stream) = new CompressedLineNumberWriteStream( 1346 linenumbertable_buffer, fixed_buffer_size); 1347 } 1348 } 1349 1350 while (num_entries-- > 0) { 1351 u2 bci = cfs->get_u2_fast(); // start_pc 1352 u2 line = cfs->get_u2_fast(); // line_number 1353 guarantee_property(bci < code_length, 1354 "Invalid pc in LineNumberTable in class file %s", CHECK); 1355 (*write_stream)->write_pair(bci, line); 1356 } 1357} 1358 1359 1360// Class file LocalVariableTable elements. 1361class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1362 public: 1363 u2 start_bci; 1364 u2 length; 1365 u2 name_cp_index; 1366 u2 descriptor_cp_index; 1367 u2 slot; 1368}; 1369 1370 1371class LVT_Hash: public CHeapObj<mtClass> { 1372 public: 1373 LocalVariableTableElement *_elem; // element 1374 LVT_Hash* _next; // Next entry in hash table 1375}; 1376 1377unsigned int hash(LocalVariableTableElement *elem) { 1378 unsigned int raw_hash = elem->start_bci; 1379 1380 raw_hash = elem->length + raw_hash * 37; 1381 raw_hash = elem->name_cp_index + raw_hash * 37; 1382 raw_hash = elem->slot + raw_hash * 37; 1383 1384 return raw_hash % HASH_ROW_SIZE; 1385} 1386 1387void initialize_hashtable(LVT_Hash** table) { 1388 for (int i = 0; i < HASH_ROW_SIZE; i++) { 1389 table[i] = NULL; 1390 } 1391} 1392 1393void clear_hashtable(LVT_Hash** table) { 1394 for (int i = 0; i < HASH_ROW_SIZE; i++) { 1395 LVT_Hash* current = table[i]; 1396 LVT_Hash* next; 1397 while (current != NULL) { 1398 next = current->_next; 1399 current->_next = NULL; 1400 delete(current); 1401 current = next; 1402 } 1403 table[i] = NULL; 1404 } 1405} 1406 1407LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { 1408 LVT_Hash* entry = table[index]; 1409 1410 /* 1411 * 3-tuple start_bci/length/slot has to be unique key, 1412 * so the following comparison seems to be redundant: 1413 * && elem->name_cp_index == entry->_elem->name_cp_index 1414 */ 1415 while (entry != NULL) { 1416 if (elem->start_bci == entry->_elem->start_bci 1417 && elem->length == entry->_elem->length 1418 && elem->name_cp_index == entry->_elem->name_cp_index 1419 && elem->slot == entry->_elem->slot 1420 ) { 1421 return entry; 1422 } 1423 entry = entry->_next; 1424 } 1425 return NULL; 1426} 1427 1428// Return false if the local variable is found in table. 1429// Return true if no duplicate is found. 1430// And local variable is added as a new entry in table. 1431bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { 1432 // First lookup for duplicates 1433 int index = hash(elem); 1434 LVT_Hash* entry = LVT_lookup(elem, index, table); 1435 1436 if (entry != NULL) { 1437 return false; 1438 } 1439 // No duplicate is found, allocate a new entry and fill it. 1440 if ((entry = new LVT_Hash()) == NULL) { 1441 return false; 1442 } 1443 entry->_elem = elem; 1444 1445 // Insert into hash table 1446 entry->_next = table[index]; 1447 table[index] = entry; 1448 1449 return true; 1450} 1451 1452void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { 1453 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1454 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1455 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1456 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1457 lvt->signature_cp_index = 0; 1458 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1459} 1460 1461// Function is used to parse both attributes: 1462// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1463u2* ClassFileParser::parse_localvariable_table(u4 code_length, 1464 u2 max_locals, 1465 u4 code_attribute_length, 1466 constantPoolHandle cp, 1467 u2* localvariable_table_length, 1468 bool isLVTT, 1469 TRAPS) { 1470 ClassFileStream* cfs = stream(); 1471 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1472 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1473 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1474 // Verify local variable table attribute has right length 1475 if (_need_verify) { 1476 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1477 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1478 } 1479 u2* localvariable_table_start = cfs->get_u2_buffer(); 1480 assert(localvariable_table_start != NULL, "null local variable table"); 1481 if (!_need_verify) { 1482 cfs->skip_u2_fast(size); 1483 } else { 1484 cfs->guarantee_more(size * 2, CHECK_NULL); 1485 for(int i = 0; i < (*localvariable_table_length); i++) { 1486 u2 start_pc = cfs->get_u2_fast(); 1487 u2 length = cfs->get_u2_fast(); 1488 u2 name_index = cfs->get_u2_fast(); 1489 u2 descriptor_index = cfs->get_u2_fast(); 1490 u2 index = cfs->get_u2_fast(); 1491 // Assign to a u4 to avoid overflow 1492 u4 end_pc = (u4)start_pc + (u4)length; 1493 1494 if (start_pc >= code_length) { 1495 classfile_parse_error( 1496 "Invalid start_pc %u in %s in class file %s", 1497 start_pc, tbl_name, CHECK_NULL); 1498 } 1499 if (end_pc > code_length) { 1500 classfile_parse_error( 1501 "Invalid length %u in %s in class file %s", 1502 length, tbl_name, CHECK_NULL); 1503 } 1504 int cp_size = cp->length(); 1505 guarantee_property( 1506 valid_cp_range(name_index, cp_size) && 1507 cp->tag_at(name_index).is_utf8(), 1508 "Name index %u in %s has bad constant type in class file %s", 1509 name_index, tbl_name, CHECK_NULL); 1510 guarantee_property( 1511 valid_cp_range(descriptor_index, cp_size) && 1512 cp->tag_at(descriptor_index).is_utf8(), 1513 "Signature index %u in %s has bad constant type in class file %s", 1514 descriptor_index, tbl_name, CHECK_NULL); 1515 1516 Symbol* name = cp->symbol_at(name_index); 1517 Symbol* sig = cp->symbol_at(descriptor_index); 1518 verify_legal_field_name(name, CHECK_NULL); 1519 u2 extra_slot = 0; 1520 if (!isLVTT) { 1521 verify_legal_field_signature(name, sig, CHECK_NULL); 1522 1523 // 4894874: check special cases for double and long local variables 1524 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1525 sig == vmSymbols::type_signature(T_LONG)) { 1526 extra_slot = 1; 1527 } 1528 } 1529 guarantee_property((index + extra_slot) < max_locals, 1530 "Invalid index %u in %s in class file %s", 1531 index, tbl_name, CHECK_NULL); 1532 } 1533 } 1534 return localvariable_table_start; 1535} 1536 1537 1538void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, 1539 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { 1540 ClassFileStream* cfs = stream(); 1541 u2 index = 0; // index in the array with long/double occupying two slots 1542 u4 i1 = *u1_index; 1543 u4 i2 = *u2_index + 1; 1544 for(int i = 0; i < array_length; i++) { 1545 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1546 index++; 1547 if (tag == ITEM_Long || tag == ITEM_Double) { 1548 index++; 1549 } else if (tag == ITEM_Object) { 1550 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1551 guarantee_property(valid_cp_range(class_index, cp->length()) && 1552 is_klass_reference(cp, class_index), 1553 "Bad class index %u in StackMap in class file %s", 1554 class_index, CHECK); 1555 } else if (tag == ITEM_Uninitialized) { 1556 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1557 guarantee_property( 1558 offset < code_length, 1559 "Bad uninitialized type offset %u in StackMap in class file %s", 1560 offset, CHECK); 1561 } else { 1562 guarantee_property( 1563 tag <= (u1)ITEM_Uninitialized, 1564 "Unknown variable type %u in StackMap in class file %s", 1565 tag, CHECK); 1566 } 1567 } 1568 u2_array[*u2_index] = index; 1569 *u1_index = i1; 1570 *u2_index = i2; 1571} 1572 1573typeArrayOop ClassFileParser::parse_stackmap_table( 1574 u4 code_attribute_length, TRAPS) { 1575 if (code_attribute_length == 0) 1576 return NULL; 1577 1578 ClassFileStream* cfs = stream(); 1579 u1* stackmap_table_start = cfs->get_u1_buffer(); 1580 assert(stackmap_table_start != NULL, "null stackmap table"); 1581 1582 // check code_attribute_length first 1583 stream()->skip_u1(code_attribute_length, CHECK_NULL); 1584 1585 if (!_need_verify && !DumpSharedSpaces) { 1586 return NULL; 1587 } 1588 1589 typeArrayOop stackmap_data = 1590 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); 1591 1592 stackmap_data->set_length(code_attribute_length); 1593 memcpy((void*)stackmap_data->byte_at_addr(0), 1594 (void*)stackmap_table_start, code_attribute_length); 1595 return stackmap_data; 1596} 1597 1598u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, 1599 u4 method_attribute_length, 1600 constantPoolHandle cp, TRAPS) { 1601 ClassFileStream* cfs = stream(); 1602 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1603 *checked_exceptions_length = cfs->get_u2_fast(); 1604 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1605 u2* checked_exceptions_start = cfs->get_u2_buffer(); 1606 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1607 if (!_need_verify) { 1608 cfs->skip_u2_fast(size); 1609 } else { 1610 // Verify each value in the checked exception table 1611 u2 checked_exception; 1612 u2 len = *checked_exceptions_length; 1613 cfs->guarantee_more(2 * len, CHECK_NULL); 1614 for (int i = 0; i < len; i++) { 1615 checked_exception = cfs->get_u2_fast(); 1616 check_property( 1617 valid_cp_range(checked_exception, cp->length()) && 1618 is_klass_reference(cp, checked_exception), 1619 "Exception name has bad type at constant pool %u in class file %s", 1620 checked_exception, CHECK_NULL); 1621 } 1622 } 1623 // check exceptions attribute length 1624 if (_need_verify) { 1625 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1626 sizeof(u2) * size), 1627 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1628 } 1629 return checked_exceptions_start; 1630} 1631 1632void ClassFileParser::throwIllegalSignature( 1633 const char* type, Symbol* name, Symbol* sig, TRAPS) { 1634 ResourceMark rm(THREAD); 1635 Exceptions::fthrow(THREAD_AND_LOCATION, 1636 vmSymbols::java_lang_ClassFormatError(), 1637 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1638 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1639} 1640 1641#define MAX_ARGS_SIZE 255 1642#define MAX_CODE_SIZE 65535 1643#define INITIAL_MAX_LVT_NUMBER 256 1644 1645// Note: the parse_method below is big and clunky because all parsing of the code and exceptions 1646// attribute is inlined. This is curbersome to avoid since we inline most of the parts in the 1647// methodOop to save footprint, so we only know the size of the resulting methodOop when the 1648// entire method attribute is parsed. 1649// 1650// The promoted_flags parameter is used to pass relevant access_flags 1651// from the method back up to the containing klass. These flag values 1652// are added to klass's access_flags. 1653 1654methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, 1655 AccessFlags *promoted_flags, 1656 typeArrayHandle* method_annotations, 1657 typeArrayHandle* method_parameter_annotations, 1658 typeArrayHandle* method_default_annotations, 1659 TRAPS) { 1660 ClassFileStream* cfs = stream(); 1661 methodHandle nullHandle; 1662 ResourceMark rm(THREAD); 1663 // Parse fixed parts 1664 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count 1665 1666 int flags = cfs->get_u2_fast(); 1667 u2 name_index = cfs->get_u2_fast(); 1668 int cp_size = cp->length(); 1669 check_property( 1670 valid_cp_range(name_index, cp_size) && 1671 cp->tag_at(name_index).is_utf8(), 1672 "Illegal constant pool index %u for method name in class file %s", 1673 name_index, CHECK_(nullHandle)); 1674 Symbol* name = cp->symbol_at(name_index); 1675 verify_legal_method_name(name, CHECK_(nullHandle)); 1676 1677 u2 signature_index = cfs->get_u2_fast(); 1678 guarantee_property( 1679 valid_cp_range(signature_index, cp_size) && 1680 cp->tag_at(signature_index).is_utf8(), 1681 "Illegal constant pool index %u for method signature in class file %s", 1682 signature_index, CHECK_(nullHandle)); 1683 Symbol* signature = cp->symbol_at(signature_index); 1684 1685 AccessFlags access_flags; 1686 if (name == vmSymbols::class_initializer_name()) { 1687 // We ignore the other access flags for a valid class initializer. 1688 // (JVM Spec 2nd ed., chapter 4.6) 1689 if (_major_version < 51) { // backward compatibility 1690 flags = JVM_ACC_STATIC; 1691 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 1692 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 1693 } 1694 } else { 1695 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); 1696 } 1697 1698 int args_size = -1; // only used when _need_verify is true 1699 if (_need_verify) { 1700 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 1701 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); 1702 if (args_size > MAX_ARGS_SIZE) { 1703 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); 1704 } 1705 } 1706 1707 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 1708 1709 // Default values for code and exceptions attribute elements 1710 u2 max_stack = 0; 1711 u2 max_locals = 0; 1712 u4 code_length = 0; 1713 u1* code_start = 0; 1714 u2 exception_table_length = 0; 1715 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); 1716 u2 checked_exceptions_length = 0; 1717 u2* checked_exceptions_start = NULL; 1718 CompressedLineNumberWriteStream* linenumber_table = NULL; 1719 int linenumber_table_length = 0; 1720 int total_lvt_length = 0; 1721 u2 lvt_cnt = 0; 1722 u2 lvtt_cnt = 0; 1723 bool lvt_allocated = false; 1724 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 1725 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 1726 u2* localvariable_table_length; 1727 u2** localvariable_table_start; 1728 u2* localvariable_type_table_length; 1729 u2** localvariable_type_table_start; 1730 bool parsed_code_attribute = false; 1731 bool parsed_checked_exceptions_attribute = false; 1732 bool parsed_stackmap_attribute = false; 1733 // stackmap attribute - JDK1.5 1734 typeArrayHandle stackmap_data; 1735 u2 generic_signature_index = 0; 1736 u1* runtime_visible_annotations = NULL; 1737 int runtime_visible_annotations_length = 0; 1738 u1* runtime_invisible_annotations = NULL; 1739 int runtime_invisible_annotations_length = 0; 1740 u1* runtime_visible_parameter_annotations = NULL; 1741 int runtime_visible_parameter_annotations_length = 0; 1742 u1* runtime_invisible_parameter_annotations = NULL; 1743 int runtime_invisible_parameter_annotations_length = 0; 1744 u1* annotation_default = NULL; 1745 int annotation_default_length = 0; 1746 1747 // Parse code and exceptions attribute 1748 u2 method_attributes_count = cfs->get_u2_fast(); 1749 while (method_attributes_count--) { 1750 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length 1751 u2 method_attribute_name_index = cfs->get_u2_fast(); 1752 u4 method_attribute_length = cfs->get_u4_fast(); 1753 check_property( 1754 valid_cp_range(method_attribute_name_index, cp_size) && 1755 cp->tag_at(method_attribute_name_index).is_utf8(), 1756 "Invalid method attribute name index %u in class file %s", 1757 method_attribute_name_index, CHECK_(nullHandle)); 1758 1759 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index); 1760 if (method_attribute_name == vmSymbols::tag_code()) { 1761 // Parse Code attribute 1762 if (_need_verify) { 1763 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), 1764 "Code attribute in native or abstract methods in class file %s", 1765 CHECK_(nullHandle)); 1766 } 1767 if (parsed_code_attribute) { 1768 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); 1769 } 1770 parsed_code_attribute = true; 1771 1772 // Stack size, locals size, and code size 1773 if (_major_version == 45 && _minor_version <= 2) { 1774 cfs->guarantee_more(4, CHECK_(nullHandle)); 1775 max_stack = cfs->get_u1_fast(); 1776 max_locals = cfs->get_u1_fast(); 1777 code_length = cfs->get_u2_fast(); 1778 } else { 1779 cfs->guarantee_more(8, CHECK_(nullHandle)); 1780 max_stack = cfs->get_u2_fast(); 1781 max_locals = cfs->get_u2_fast(); 1782 code_length = cfs->get_u4_fast(); 1783 } 1784 if (_need_verify) { 1785 guarantee_property(args_size <= max_locals, 1786 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); 1787 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 1788 "Invalid method Code length %u in class file %s", 1789 code_length, CHECK_(nullHandle)); 1790 } 1791 // Code pointer 1792 code_start = cfs->get_u1_buffer(); 1793 assert(code_start != NULL, "null code start"); 1794 cfs->guarantee_more(code_length, CHECK_(nullHandle)); 1795 cfs->skip_u1_fast(code_length); 1796 1797 // Exception handler table 1798 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length 1799 exception_table_length = cfs->get_u2_fast(); 1800 if (exception_table_length > 0) { 1801 exception_handlers = 1802 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); 1803 } 1804 1805 // Parse additional attributes in code attribute 1806 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count 1807 u2 code_attributes_count = cfs->get_u2_fast(); 1808 1809 unsigned int calculated_attribute_length = 0; 1810 1811 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 1812 calculated_attribute_length = 1813 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 1814 } else { 1815 // max_stack, locals and length are smaller in pre-version 45.2 classes 1816 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 1817 } 1818 calculated_attribute_length += 1819 code_length + 1820 sizeof(exception_table_length) + 1821 sizeof(code_attributes_count) + 1822 exception_table_length * 1823 ( sizeof(u2) + // start_pc 1824 sizeof(u2) + // end_pc 1825 sizeof(u2) + // handler_pc 1826 sizeof(u2) ); // catch_type_index 1827 1828 while (code_attributes_count--) { 1829 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length 1830 u2 code_attribute_name_index = cfs->get_u2_fast(); 1831 u4 code_attribute_length = cfs->get_u4_fast(); 1832 calculated_attribute_length += code_attribute_length + 1833 sizeof(code_attribute_name_index) + 1834 sizeof(code_attribute_length); 1835 check_property(valid_cp_range(code_attribute_name_index, cp_size) && 1836 cp->tag_at(code_attribute_name_index).is_utf8(), 1837 "Invalid code attribute name index %u in class file %s", 1838 code_attribute_name_index, 1839 CHECK_(nullHandle)); 1840 if (LoadLineNumberTables && 1841 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 1842 // Parse and compress line number table 1843 parse_linenumber_table(code_attribute_length, code_length, 1844 &linenumber_table, CHECK_(nullHandle)); 1845 1846 } else if (LoadLocalVariableTables && 1847 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 1848 // Parse local variable table 1849 if (!lvt_allocated) { 1850 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 1851 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 1852 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 1853 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); 1854 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 1855 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 1856 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 1857 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); 1858 lvt_allocated = true; 1859 } 1860 if (lvt_cnt == max_lvt_cnt) { 1861 max_lvt_cnt <<= 1; 1862 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 1863 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 1864 } 1865 localvariable_table_start[lvt_cnt] = 1866 parse_localvariable_table(code_length, 1867 max_locals, 1868 code_attribute_length, 1869 cp, 1870 &localvariable_table_length[lvt_cnt], 1871 false, // is not LVTT 1872 CHECK_(nullHandle)); 1873 total_lvt_length += localvariable_table_length[lvt_cnt]; 1874 lvt_cnt++; 1875 } else if (LoadLocalVariableTypeTables && 1876 _major_version >= JAVA_1_5_VERSION && 1877 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 1878 if (!lvt_allocated) { 1879 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 1880 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 1881 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 1882 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); 1883 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 1884 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 1885 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 1886 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); 1887 lvt_allocated = true; 1888 } 1889 // Parse local variable type table 1890 if (lvtt_cnt == max_lvtt_cnt) { 1891 max_lvtt_cnt <<= 1; 1892 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 1893 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 1894 } 1895 localvariable_type_table_start[lvtt_cnt] = 1896 parse_localvariable_table(code_length, 1897 max_locals, 1898 code_attribute_length, 1899 cp, 1900 &localvariable_type_table_length[lvtt_cnt], 1901 true, // is LVTT 1902 CHECK_(nullHandle)); 1903 lvtt_cnt++; 1904 } else if (UseSplitVerifier && 1905 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 1906 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 1907 // Stack map is only needed by the new verifier in JDK1.5. 1908 if (parsed_stackmap_attribute) { 1909 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); 1910 } 1911 typeArrayOop sm = 1912 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); 1913 stackmap_data = typeArrayHandle(THREAD, sm); 1914 parsed_stackmap_attribute = true; 1915 } else { 1916 // Skip unknown attributes 1917 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); 1918 } 1919 } 1920 // check method attribute length 1921 if (_need_verify) { 1922 guarantee_property(method_attribute_length == calculated_attribute_length, 1923 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); 1924 } 1925 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 1926 // Parse Exceptions attribute 1927 if (parsed_checked_exceptions_attribute) { 1928 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); 1929 } 1930 parsed_checked_exceptions_attribute = true; 1931 checked_exceptions_start = 1932 parse_checked_exceptions(&checked_exceptions_length, 1933 method_attribute_length, 1934 cp, CHECK_(nullHandle)); 1935 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 1936 if (method_attribute_length != 0) { 1937 classfile_parse_error( 1938 "Invalid Synthetic method attribute length %u in class file %s", 1939 method_attribute_length, CHECK_(nullHandle)); 1940 } 1941 // Should we check that there hasn't already been a synthetic attribute? 1942 access_flags.set_is_synthetic(); 1943 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1944 if (method_attribute_length != 0) { 1945 classfile_parse_error( 1946 "Invalid Deprecated method attribute length %u in class file %s", 1947 method_attribute_length, CHECK_(nullHandle)); 1948 } 1949 } else if (_major_version >= JAVA_1_5_VERSION) { 1950 if (method_attribute_name == vmSymbols::tag_signature()) { 1951 if (method_attribute_length != 2) { 1952 classfile_parse_error( 1953 "Invalid Signature attribute length %u in class file %s", 1954 method_attribute_length, CHECK_(nullHandle)); 1955 } 1956 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index 1957 generic_signature_index = cfs->get_u2_fast(); 1958 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1959 runtime_visible_annotations_length = method_attribute_length; 1960 runtime_visible_annotations = cfs->get_u1_buffer(); 1961 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1962 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); 1963 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1964 runtime_invisible_annotations_length = method_attribute_length; 1965 runtime_invisible_annotations = cfs->get_u1_buffer(); 1966 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1967 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); 1968 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 1969 runtime_visible_parameter_annotations_length = method_attribute_length; 1970 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 1971 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 1972 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); 1973 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 1974 runtime_invisible_parameter_annotations_length = method_attribute_length; 1975 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 1976 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); 1977 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); 1978 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 1979 annotation_default_length = method_attribute_length; 1980 annotation_default = cfs->get_u1_buffer(); 1981 assert(annotation_default != NULL, "null annotation default"); 1982 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); 1983 } else { 1984 // Skip unknown attributes 1985 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); 1986 } 1987 } else { 1988 // Skip unknown attributes 1989 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); 1990 } 1991 } 1992 1993 if (linenumber_table != NULL) { 1994 linenumber_table->write_terminator(); 1995 linenumber_table_length = linenumber_table->position(); 1996 } 1997 1998 // Make sure there's at least one Code attribute in non-native/non-abstract method 1999 if (_need_verify) { 2000 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, 2001 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); 2002 } 2003 2004 // All sizing information for a methodOop is finally available, now create it 2005 methodOop m_oop = oopFactory::new_method(code_length, access_flags, linenumber_table_length, 2006 total_lvt_length, checked_exceptions_length, 2007 oopDesc::IsSafeConc, CHECK_(nullHandle)); 2008 methodHandle m (THREAD, m_oop); 2009 2010 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); 2011 2012 // Fill in information from fixed part (access_flags already set) 2013 m->set_constants(cp()); 2014 m->set_name_index(name_index); 2015 m->set_signature_index(signature_index); 2016 m->set_generic_signature_index(generic_signature_index); 2017#ifdef CC_INTERP 2018 // hmm is there a gc issue here?? 2019 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2020 m->set_result_index(rtf.type()); 2021#endif 2022 2023 if (args_size >= 0) { 2024 m->set_size_of_parameters(args_size); 2025 } else { 2026 m->compute_size_of_parameters(THREAD); 2027 } 2028#ifdef ASSERT 2029 if (args_size >= 0) { 2030 m->compute_size_of_parameters(THREAD); 2031 assert(args_size == m->size_of_parameters(), ""); 2032 } 2033#endif 2034 2035 // Fill in code attribute information 2036 m->set_max_stack(max_stack); 2037 m->set_max_locals(max_locals); 2038 m->constMethod()->set_stackmap_data(stackmap_data()); 2039 2040 /** 2041 * The exception_table field is the flag used to indicate 2042 * that the methodOop and it's associated constMethodOop are partially 2043 * initialized and thus are exempt from pre/post GC verification. Once 2044 * the field is set, the oops are considered fully initialized so make 2045 * sure that the oops can pass verification when this field is set. 2046 */ 2047 m->set_exception_table(exception_handlers()); 2048 2049 // Copy byte codes 2050 m->set_code(code_start); 2051 2052 // Copy line number table 2053 if (linenumber_table != NULL) { 2054 memcpy(m->compressed_linenumber_table(), 2055 linenumber_table->buffer(), linenumber_table_length); 2056 } 2057 2058 // Copy checked exceptions 2059 if (checked_exceptions_length > 0) { 2060 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2061 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); 2062 } 2063 2064 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2065 * 2066 * Rules for LVT's and LVTT's are: 2067 * - There can be any number of LVT's and LVTT's. 2068 * - If there are n LVT's, it is the same as if there was just 2069 * one LVT containing all the entries from the n LVT's. 2070 * - There may be no more than one LVT entry per local variable. 2071 * Two LVT entries are 'equal' if these fields are the same: 2072 * start_pc, length, name, slot 2073 * - There may be no more than one LVTT entry per each LVT entry. 2074 * Each LVTT entry has to match some LVT entry. 2075 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2076 */ 2077 if (total_lvt_length > 0) { 2078 int tbl_no, idx; 2079 2080 promoted_flags->set_has_localvariable_table(); 2081 2082 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); 2083 initialize_hashtable(lvt_Hash); 2084 2085 // To fill LocalVariableTable in 2086 Classfile_LVT_Element* cf_lvt; 2087 LocalVariableTableElement* lvt = m->localvariable_table_start(); 2088 2089 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2090 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2091 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2092 copy_lvt_element(&cf_lvt[idx], lvt); 2093 // If no duplicates, add LVT elem in hashtable lvt_Hash. 2094 if (LVT_put_after_lookup(lvt, lvt_Hash) == false 2095 && _need_verify 2096 && _major_version >= JAVA_1_5_VERSION ) { 2097 clear_hashtable(lvt_Hash); 2098 classfile_parse_error("Duplicated LocalVariableTable attribute " 2099 "entry for '%s' in class file %s", 2100 cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2101 CHECK_(nullHandle)); 2102 } 2103 } 2104 } 2105 2106 // To merge LocalVariableTable and LocalVariableTypeTable 2107 Classfile_LVT_Element* cf_lvtt; 2108 LocalVariableTableElement lvtt_elem; 2109 2110 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2111 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2112 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2113 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2114 int index = hash(&lvtt_elem); 2115 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); 2116 if (entry == NULL) { 2117 if (_need_verify) { 2118 clear_hashtable(lvt_Hash); 2119 classfile_parse_error("LVTT entry for '%s' in class file %s " 2120 "does not match any LVT entry", 2121 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2122 CHECK_(nullHandle)); 2123 } 2124 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { 2125 clear_hashtable(lvt_Hash); 2126 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2127 "entry for '%s' in class file %s", 2128 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2129 CHECK_(nullHandle)); 2130 } else { 2131 // to add generic signatures into LocalVariableTable 2132 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; 2133 } 2134 } 2135 } 2136 clear_hashtable(lvt_Hash); 2137 } 2138 2139 *method_annotations = assemble_annotations(runtime_visible_annotations, 2140 runtime_visible_annotations_length, 2141 runtime_invisible_annotations, 2142 runtime_invisible_annotations_length, 2143 CHECK_(nullHandle)); 2144 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, 2145 runtime_visible_parameter_annotations_length, 2146 runtime_invisible_parameter_annotations, 2147 runtime_invisible_parameter_annotations_length, 2148 CHECK_(nullHandle)); 2149 *method_default_annotations = assemble_annotations(annotation_default, 2150 annotation_default_length, 2151 NULL, 2152 0, 2153 CHECK_(nullHandle)); 2154 2155 if (name == vmSymbols::finalize_method_name() && 2156 signature == vmSymbols::void_method_signature()) { 2157 if (m->is_empty_method()) { 2158 _has_empty_finalizer = true; 2159 } else { 2160 _has_finalizer = true; 2161 } 2162 } 2163 if (name == vmSymbols::object_initializer_name() && 2164 signature == vmSymbols::void_method_signature() && 2165 m->is_vanilla_constructor()) { 2166 _has_vanilla_constructor = true; 2167 } 2168 2169 if (EnableInvokeDynamic && (m->is_method_handle_invoke() || 2170 m->is_method_handle_adapter())) { 2171 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), 2172 "Method handle invokers must be defined internally to the VM", nullHandle); 2173 } 2174 2175 return m; 2176} 2177 2178 2179// The promoted_flags parameter is used to pass relevant access_flags 2180// from the methods back up to the containing klass. These flag values 2181// are added to klass's access_flags. 2182 2183objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, 2184 AccessFlags* promoted_flags, 2185 bool* has_final_method, 2186 objArrayOop* methods_annotations_oop, 2187 objArrayOop* methods_parameter_annotations_oop, 2188 objArrayOop* methods_default_annotations_oop, 2189 TRAPS) { 2190 ClassFileStream* cfs = stream(); 2191 objArrayHandle nullHandle; 2192 typeArrayHandle method_annotations; 2193 typeArrayHandle method_parameter_annotations; 2194 typeArrayHandle method_default_annotations; 2195 cfs->guarantee_more(2, CHECK_(nullHandle)); // length 2196 u2 length = cfs->get_u2_fast(); 2197 if (length == 0) { 2198 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); 2199 } else { 2200 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 2201 objArrayHandle methods(THREAD, m); 2202 HandleMark hm(THREAD); 2203 objArrayHandle methods_annotations; 2204 objArrayHandle methods_parameter_annotations; 2205 objArrayHandle methods_default_annotations; 2206 for (int index = 0; index < length; index++) { 2207 methodHandle method = parse_method(cp, is_interface, 2208 promoted_flags, 2209 &method_annotations, 2210 &method_parameter_annotations, 2211 &method_default_annotations, 2212 CHECK_(nullHandle)); 2213 if (method->is_final()) { 2214 *has_final_method = true; 2215 } 2216 methods->obj_at_put(index, method()); 2217 if (method_annotations.not_null()) { 2218 if (methods_annotations.is_null()) { 2219 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 2220 methods_annotations = objArrayHandle(THREAD, md); 2221 } 2222 methods_annotations->obj_at_put(index, method_annotations()); 2223 } 2224 if (method_parameter_annotations.not_null()) { 2225 if (methods_parameter_annotations.is_null()) { 2226 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 2227 methods_parameter_annotations = objArrayHandle(THREAD, md); 2228 } 2229 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); 2230 } 2231 if (method_default_annotations.not_null()) { 2232 if (methods_default_annotations.is_null()) { 2233 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); 2234 methods_default_annotations = objArrayHandle(THREAD, md); 2235 } 2236 methods_default_annotations->obj_at_put(index, method_default_annotations()); 2237 } 2238 } 2239 if (_need_verify && length > 1) { 2240 // Check duplicated methods 2241 ResourceMark rm(THREAD); 2242 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2243 THREAD, NameSigHash*, HASH_ROW_SIZE); 2244 initialize_hashtable(names_and_sigs); 2245 bool dup = false; 2246 { 2247 debug_only(No_Safepoint_Verifier nsv;) 2248 for (int i = 0; i < length; i++) { 2249 methodOop m = (methodOop)methods->obj_at(i); 2250 // If no duplicates, add name/signature in hashtable names_and_sigs. 2251 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { 2252 dup = true; 2253 break; 2254 } 2255 } 2256 } 2257 if (dup) { 2258 classfile_parse_error("Duplicate method name&signature in class file %s", 2259 CHECK_(nullHandle)); 2260 } 2261 } 2262 2263 *methods_annotations_oop = methods_annotations(); 2264 *methods_parameter_annotations_oop = methods_parameter_annotations(); 2265 *methods_default_annotations_oop = methods_default_annotations(); 2266 2267 return methods; 2268 } 2269} 2270 2271 2272typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, 2273 objArrayHandle methods_annotations, 2274 objArrayHandle methods_parameter_annotations, 2275 objArrayHandle methods_default_annotations, 2276 TRAPS) { 2277 typeArrayHandle nullHandle; 2278 int length = methods()->length(); 2279 // If JVMTI original method ordering or sharing is enabled we have to 2280 // remember the original class file ordering. 2281 // We temporarily use the vtable_index field in the methodOop to store the 2282 // class file index, so we can read in after calling qsort. 2283 // Put the method ordering in the shared archive. 2284 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2285 for (int index = 0; index < length; index++) { 2286 methodOop m = methodOop(methods->obj_at(index)); 2287 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2288 m->set_vtable_index(index); 2289 } 2290 } 2291 // Sort method array by ascending method name (for faster lookups & vtable construction) 2292 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2293 methodOopDesc::sort_methods(methods(), 2294 methods_annotations(), 2295 methods_parameter_annotations(), 2296 methods_default_annotations()); 2297 2298 // If JVMTI original method ordering or sharing is enabled construct int 2299 // array remembering the original ordering 2300 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2301 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); 2302 typeArrayHandle method_ordering(THREAD, new_ordering); 2303 for (int index = 0; index < length; index++) { 2304 methodOop m = methodOop(methods->obj_at(index)); 2305 int old_index = m->vtable_index(); 2306 assert(old_index >= 0 && old_index < length, "invalid method index"); 2307 method_ordering->int_at_put(index, old_index); 2308 m->set_vtable_index(methodOopDesc::invalid_vtable_index); 2309 } 2310 return method_ordering; 2311 } else { 2312 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); 2313 } 2314} 2315 2316 2317void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { 2318 ClassFileStream* cfs = stream(); 2319 cfs->guarantee_more(2, CHECK); // sourcefile_index 2320 u2 sourcefile_index = cfs->get_u2_fast(); 2321 check_property( 2322 valid_cp_range(sourcefile_index, cp->length()) && 2323 cp->tag_at(sourcefile_index).is_utf8(), 2324 "Invalid SourceFile attribute at constant pool index %u in class file %s", 2325 sourcefile_index, CHECK); 2326 k->set_source_file_name(cp->symbol_at(sourcefile_index)); 2327} 2328 2329 2330 2331void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, 2332 instanceKlassHandle k, 2333 int length, TRAPS) { 2334 ClassFileStream* cfs = stream(); 2335 u1* sde_buffer = cfs->get_u1_buffer(); 2336 assert(sde_buffer != NULL, "null sde buffer"); 2337 2338 // Don't bother storing it if there is no way to retrieve it 2339 if (JvmtiExport::can_get_source_debug_extension()) { 2340 // Optimistically assume that only 1 byte UTF format is used 2341 // (common case) 2342 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK); 2343 k->set_source_debug_extension(sde_symbol); 2344 // Note that set_source_debug_extension() increments the reference count 2345 // for its copy of the Symbol*, so use a TempNewSymbol here. 2346 } 2347 // Got utf8 string, set stream position forward 2348 cfs->skip_u1(length, CHECK); 2349} 2350 2351 2352// Inner classes can be static, private or protected (classic VM does this) 2353#define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) 2354 2355// Return number of classes in the inner classes attribute table 2356u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start, 2357 bool parsed_enclosingmethod_attribute, 2358 u2 enclosing_method_class_index, 2359 u2 enclosing_method_method_index, 2360 constantPoolHandle cp, 2361 instanceKlassHandle k, TRAPS) { 2362 ClassFileStream* cfs = stream(); 2363 u1* current_mark = cfs->current(); 2364 u2 length = 0; 2365 if (inner_classes_attribute_start != NULL) { 2366 cfs->set_current(inner_classes_attribute_start); 2367 cfs->guarantee_more(2, CHECK_0); // length 2368 length = cfs->get_u2_fast(); 2369 } 2370 2371 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 2372 // method data: 2373 // [inner_class_info_index, 2374 // outer_class_info_index, 2375 // inner_name_index, 2376 // inner_class_access_flags, 2377 // ... 2378 // enclosing_method_class_index, 2379 // enclosing_method_method_index] 2380 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 2381 typeArrayOop ic = oopFactory::new_permanent_shortArray(size, CHECK_0); 2382 typeArrayHandle inner_classes(THREAD, ic); 2383 int index = 0; 2384 int cp_size = cp->length(); 2385 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 2386 for (int n = 0; n < length; n++) { 2387 // Inner class index 2388 u2 inner_class_info_index = cfs->get_u2_fast(); 2389 check_property( 2390 inner_class_info_index == 0 || 2391 (valid_cp_range(inner_class_info_index, cp_size) && 2392 is_klass_reference(cp, inner_class_info_index)), 2393 "inner_class_info_index %u has bad constant type in class file %s", 2394 inner_class_info_index, CHECK_0); 2395 // Outer class index 2396 u2 outer_class_info_index = cfs->get_u2_fast(); 2397 check_property( 2398 outer_class_info_index == 0 || 2399 (valid_cp_range(outer_class_info_index, cp_size) && 2400 is_klass_reference(cp, outer_class_info_index)), 2401 "outer_class_info_index %u has bad constant type in class file %s", 2402 outer_class_info_index, CHECK_0); 2403 // Inner class name 2404 u2 inner_name_index = cfs->get_u2_fast(); 2405 check_property( 2406 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && 2407 cp->tag_at(inner_name_index).is_utf8()), 2408 "inner_name_index %u has bad constant type in class file %s", 2409 inner_name_index, CHECK_0); 2410 if (_need_verify) { 2411 guarantee_property(inner_class_info_index != outer_class_info_index, 2412 "Class is both outer and inner class in class file %s", CHECK_0); 2413 } 2414 // Access flags 2415 AccessFlags inner_access_flags; 2416 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 2417 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 2418 // Set abstract bit for old class files for backward compatibility 2419 flags |= JVM_ACC_ABSTRACT; 2420 } 2421 verify_legal_class_modifiers(flags, CHECK_0); 2422 inner_access_flags.set_flags(flags); 2423 2424 inner_classes->short_at_put(index++, inner_class_info_index); 2425 inner_classes->short_at_put(index++, outer_class_info_index); 2426 inner_classes->short_at_put(index++, inner_name_index); 2427 inner_classes->short_at_put(index++, inner_access_flags.as_short()); 2428 } 2429 2430 // 4347400: make sure there's no duplicate entry in the classes array 2431 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 2432 for(int i = 0; i < length * 4; i += 4) { 2433 for(int j = i + 4; j < length * 4; j += 4) { 2434 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || 2435 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || 2436 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || 2437 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), 2438 "Duplicate entry in InnerClasses in class file %s", 2439 CHECK_0); 2440 } 2441 } 2442 } 2443 2444 // Set EnclosingMethod class and method indexes. 2445 if (parsed_enclosingmethod_attribute) { 2446 inner_classes->short_at_put(index++, enclosing_method_class_index); 2447 inner_classes->short_at_put(index++, enclosing_method_method_index); 2448 } 2449 assert(index == size, "wrong size"); 2450 2451 // Update instanceKlass with inner class info. 2452 k->set_inner_classes(inner_classes()); 2453 2454 // Restore buffer's current position. 2455 cfs->set_current(current_mark); 2456 2457 return length; 2458} 2459 2460void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { 2461 k->set_is_synthetic(); 2462} 2463 2464void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { 2465 ClassFileStream* cfs = stream(); 2466 u2 signature_index = cfs->get_u2(CHECK); 2467 check_property( 2468 valid_cp_range(signature_index, cp->length()) && 2469 cp->tag_at(signature_index).is_utf8(), 2470 "Invalid constant pool index %u in Signature attribute in class file %s", 2471 signature_index, CHECK); 2472 k->set_generic_signature(cp->symbol_at(signature_index)); 2473} 2474 2475void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, 2476 u4 attribute_byte_length, TRAPS) { 2477 ClassFileStream* cfs = stream(); 2478 u1* current_start = cfs->current(); 2479 2480 cfs->guarantee_more(2, CHECK); // length 2481 int attribute_array_length = cfs->get_u2_fast(); 2482 2483 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 2484 "Short length on BootstrapMethods in class file %s", 2485 CHECK); 2486 2487 // The attribute contains a counted array of counted tuples of shorts, 2488 // represending bootstrap specifiers: 2489 // length*{bootstrap_method_index, argument_count*{argument_index}} 2490 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 2491 // operand_count = number of shorts in attr, except for leading length 2492 2493 // The attribute is copied into a short[] array. 2494 // The array begins with a series of short[2] pairs, one for each tuple. 2495 int index_size = (attribute_array_length * 2); 2496 2497 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK); 2498 typeArrayHandle operands(THREAD, operands_oop); 2499 operands_oop = NULL; // tidy 2500 2501 int operand_fill_index = index_size; 2502 int cp_size = cp->length(); 2503 2504 for (int n = 0; n < attribute_array_length; n++) { 2505 // Store a 32-bit offset into the header of the operand array. 2506 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, ""); 2507 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index); 2508 2509 // Read a bootstrap specifier. 2510 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 2511 u2 bootstrap_method_index = cfs->get_u2_fast(); 2512 u2 argument_count = cfs->get_u2_fast(); 2513 check_property( 2514 valid_cp_range(bootstrap_method_index, cp_size) && 2515 cp->tag_at(bootstrap_method_index).is_method_handle(), 2516 "bootstrap_method_index %u has bad constant type in class file %s", 2517 bootstrap_method_index, 2518 CHECK); 2519 operands->short_at_put(operand_fill_index++, bootstrap_method_index); 2520 operands->short_at_put(operand_fill_index++, argument_count); 2521 2522 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 2523 for (int j = 0; j < argument_count; j++) { 2524 u2 argument_index = cfs->get_u2_fast(); 2525 check_property( 2526 valid_cp_range(argument_index, cp_size) && 2527 cp->tag_at(argument_index).is_loadable_constant(), 2528 "argument_index %u has bad constant type in class file %s", 2529 argument_index, 2530 CHECK); 2531 operands->short_at_put(operand_fill_index++, argument_index); 2532 } 2533 } 2534 2535 assert(operand_fill_index == operands()->length(), "exact fill"); 2536 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode"); 2537 2538 u1* current_end = cfs->current(); 2539 guarantee_property(current_end == current_start + attribute_byte_length, 2540 "Bad length on BootstrapMethods in class file %s", 2541 CHECK); 2542 2543 cp->set_operands(operands()); 2544} 2545 2546 2547void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { 2548 ClassFileStream* cfs = stream(); 2549 // Set inner classes attribute to default sentinel 2550 k->set_inner_classes(Universe::the_empty_short_array()); 2551 cfs->guarantee_more(2, CHECK); // attributes_count 2552 u2 attributes_count = cfs->get_u2_fast(); 2553 bool parsed_sourcefile_attribute = false; 2554 bool parsed_innerclasses_attribute = false; 2555 bool parsed_enclosingmethod_attribute = false; 2556 bool parsed_bootstrap_methods_attribute = false; 2557 u1* runtime_visible_annotations = NULL; 2558 int runtime_visible_annotations_length = 0; 2559 u1* runtime_invisible_annotations = NULL; 2560 int runtime_invisible_annotations_length = 0; 2561 u1* inner_classes_attribute_start = NULL; 2562 u4 inner_classes_attribute_length = 0; 2563 u2 enclosing_method_class_index = 0; 2564 u2 enclosing_method_method_index = 0; 2565 // Iterate over attributes 2566 while (attributes_count--) { 2567 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 2568 u2 attribute_name_index = cfs->get_u2_fast(); 2569 u4 attribute_length = cfs->get_u4_fast(); 2570 check_property( 2571 valid_cp_range(attribute_name_index, cp->length()) && 2572 cp->tag_at(attribute_name_index).is_utf8(), 2573 "Attribute name has bad constant pool index %u in class file %s", 2574 attribute_name_index, CHECK); 2575 Symbol* tag = cp->symbol_at(attribute_name_index); 2576 if (tag == vmSymbols::tag_source_file()) { 2577 // Check for SourceFile tag 2578 if (_need_verify) { 2579 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 2580 } 2581 if (parsed_sourcefile_attribute) { 2582 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 2583 } else { 2584 parsed_sourcefile_attribute = true; 2585 } 2586 parse_classfile_sourcefile_attribute(cp, k, CHECK); 2587 } else if (tag == vmSymbols::tag_source_debug_extension()) { 2588 // Check for SourceDebugExtension tag 2589 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); 2590 } else if (tag == vmSymbols::tag_inner_classes()) { 2591 // Check for InnerClasses tag 2592 if (parsed_innerclasses_attribute) { 2593 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 2594 } else { 2595 parsed_innerclasses_attribute = true; 2596 } 2597 inner_classes_attribute_start = cfs->get_u1_buffer(); 2598 inner_classes_attribute_length = attribute_length; 2599 cfs->skip_u1(inner_classes_attribute_length, CHECK); 2600 } else if (tag == vmSymbols::tag_synthetic()) { 2601 // Check for Synthetic tag 2602 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 2603 if (attribute_length != 0) { 2604 classfile_parse_error( 2605 "Invalid Synthetic classfile attribute length %u in class file %s", 2606 attribute_length, CHECK); 2607 } 2608 parse_classfile_synthetic_attribute(cp, k, CHECK); 2609 } else if (tag == vmSymbols::tag_deprecated()) { 2610 // Check for Deprecatd tag - 4276120 2611 if (attribute_length != 0) { 2612 classfile_parse_error( 2613 "Invalid Deprecated classfile attribute length %u in class file %s", 2614 attribute_length, CHECK); 2615 } 2616 } else if (_major_version >= JAVA_1_5_VERSION) { 2617 if (tag == vmSymbols::tag_signature()) { 2618 if (attribute_length != 2) { 2619 classfile_parse_error( 2620 "Wrong Signature attribute length %u in class file %s", 2621 attribute_length, CHECK); 2622 } 2623 parse_classfile_signature_attribute(cp, k, CHECK); 2624 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 2625 runtime_visible_annotations_length = attribute_length; 2626 runtime_visible_annotations = cfs->get_u1_buffer(); 2627 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2628 cfs->skip_u1(runtime_visible_annotations_length, CHECK); 2629 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { 2630 runtime_invisible_annotations_length = attribute_length; 2631 runtime_invisible_annotations = cfs->get_u1_buffer(); 2632 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2633 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); 2634 } else if (tag == vmSymbols::tag_enclosing_method()) { 2635 if (parsed_enclosingmethod_attribute) { 2636 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 2637 } else { 2638 parsed_enclosingmethod_attribute = true; 2639 } 2640 cfs->guarantee_more(4, CHECK); // class_index, method_index 2641 enclosing_method_class_index = cfs->get_u2_fast(); 2642 enclosing_method_method_index = cfs->get_u2_fast(); 2643 if (enclosing_method_class_index == 0) { 2644 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 2645 } 2646 // Validate the constant pool indices and types 2647 if (!cp->is_within_bounds(enclosing_method_class_index) || 2648 !is_klass_reference(cp, enclosing_method_class_index)) { 2649 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 2650 } 2651 if (enclosing_method_method_index != 0 && 2652 (!cp->is_within_bounds(enclosing_method_method_index) || 2653 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 2654 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 2655 } 2656 } else if (tag == vmSymbols::tag_bootstrap_methods() && 2657 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 2658 if (parsed_bootstrap_methods_attribute) 2659 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 2660 parsed_bootstrap_methods_attribute = true; 2661 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK); 2662 } else { 2663 // Unknown attribute 2664 cfs->skip_u1(attribute_length, CHECK); 2665 } 2666 } else { 2667 // Unknown attribute 2668 cfs->skip_u1(attribute_length, CHECK); 2669 } 2670 } 2671 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, 2672 runtime_visible_annotations_length, 2673 runtime_invisible_annotations, 2674 runtime_invisible_annotations_length, 2675 CHECK); 2676 k->set_class_annotations(annotations()); 2677 2678 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 2679 u2 num_of_classes = parse_classfile_inner_classes_attribute( 2680 inner_classes_attribute_start, 2681 parsed_innerclasses_attribute, 2682 enclosing_method_class_index, 2683 enclosing_method_method_index, 2684 cp, k, CHECK); 2685 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 2686 guarantee_property( 2687 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 2688 "Wrong InnerClasses attribute length in class file %s", CHECK); 2689 } 2690 } 2691 2692 if (_max_bootstrap_specifier_index >= 0) { 2693 guarantee_property(parsed_bootstrap_methods_attribute, 2694 "Missing BootstrapMethods attribute in class file %s", CHECK); 2695 } 2696} 2697 2698 2699typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, 2700 int runtime_visible_annotations_length, 2701 u1* runtime_invisible_annotations, 2702 int runtime_invisible_annotations_length, TRAPS) { 2703 typeArrayHandle annotations; 2704 if (runtime_visible_annotations != NULL || 2705 runtime_invisible_annotations != NULL) { 2706 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + 2707 runtime_invisible_annotations_length, CHECK_(annotations)); 2708 annotations = typeArrayHandle(THREAD, anno); 2709 if (runtime_visible_annotations != NULL) { 2710 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); 2711 } 2712 if (runtime_invisible_annotations != NULL) { 2713 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); 2714 } 2715 } 2716 return annotations; 2717} 2718 2719 2720instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name, 2721 Handle class_loader, 2722 Handle protection_domain, 2723 KlassHandle host_klass, 2724 GrowableArray<Handle>* cp_patches, 2725 TempNewSymbol& parsed_name, 2726 bool verify, 2727 TRAPS) { 2728 // When a retransformable agent is attached, JVMTI caches the 2729 // class bytes that existed before the first retransformation. 2730 // If RedefineClasses() was used before the retransformable 2731 // agent attached, then the cached class bytes may not be the 2732 // original class bytes. 2733 unsigned char *cached_class_file_bytes = NULL; 2734 jint cached_class_file_length; 2735 2736 ClassFileStream* cfs = stream(); 2737 // Timing 2738 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 2739 JavaThread* jt = (JavaThread*) THREAD; 2740 2741 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), 2742 ClassLoader::perf_class_parse_selftime(), 2743 NULL, 2744 jt->get_thread_stat()->perf_recursion_counts_addr(), 2745 jt->get_thread_stat()->perf_timers_addr(), 2746 PerfClassTraceTime::PARSE_CLASS); 2747 2748 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; 2749 _max_bootstrap_specifier_index = -1; 2750 2751 if (JvmtiExport::should_post_class_file_load_hook()) { 2752 // Get the cached class file bytes (if any) from the class that 2753 // is being redefined or retransformed. We use jvmti_thread_state() 2754 // instead of JvmtiThreadState::state_for(jt) so we don't allocate 2755 // a JvmtiThreadState any earlier than necessary. This will help 2756 // avoid the bug described by 7126851. 2757 JvmtiThreadState *state = jt->jvmti_thread_state(); 2758 if (state != NULL) { 2759 KlassHandle *h_class_being_redefined = 2760 state->get_class_being_redefined(); 2761 if (h_class_being_redefined != NULL) { 2762 instanceKlassHandle ikh_class_being_redefined = 2763 instanceKlassHandle(THREAD, (*h_class_being_redefined)()); 2764 cached_class_file_bytes = 2765 ikh_class_being_redefined->get_cached_class_file_bytes(); 2766 cached_class_file_length = 2767 ikh_class_being_redefined->get_cached_class_file_len(); 2768 } 2769 } 2770 2771 unsigned char* ptr = cfs->buffer(); 2772 unsigned char* end_ptr = cfs->buffer() + cfs->length(); 2773 2774 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, 2775 &ptr, &end_ptr, 2776 &cached_class_file_bytes, 2777 &cached_class_file_length); 2778 2779 if (ptr != cfs->buffer()) { 2780 // JVMTI agent has modified class file data. 2781 // Set new class file stream using JVMTI agent modified 2782 // class file data. 2783 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); 2784 set_stream(cfs); 2785 } 2786 } 2787 2788 _host_klass = host_klass; 2789 _cp_patches = cp_patches; 2790 2791 instanceKlassHandle nullHandle; 2792 2793 // Figure out whether we can skip format checking (matching classic VM behavior) 2794 _need_verify = Verifier::should_verify_for(class_loader(), verify); 2795 2796 // Set the verify flag in stream 2797 cfs->set_verify(_need_verify); 2798 2799 // Save the class file name for easier error message printing. 2800 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name(); 2801 2802 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor 2803 // Magic value 2804 u4 magic = cfs->get_u4_fast(); 2805 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 2806 "Incompatible magic value %u in class file %s", 2807 magic, CHECK_(nullHandle)); 2808 2809 // Version numbers 2810 u2 minor_version = cfs->get_u2_fast(); 2811 u2 major_version = cfs->get_u2_fast(); 2812 2813 // Check version numbers - we check this even with verifier off 2814 if (!is_supported_version(major_version, minor_version)) { 2815 if (name == NULL) { 2816 Exceptions::fthrow( 2817 THREAD_AND_LOCATION, 2818 vmSymbols::java_lang_UnsupportedClassVersionError(), 2819 "Unsupported major.minor version %u.%u", 2820 major_version, 2821 minor_version); 2822 } else { 2823 ResourceMark rm(THREAD); 2824 Exceptions::fthrow( 2825 THREAD_AND_LOCATION, 2826 vmSymbols::java_lang_UnsupportedClassVersionError(), 2827 "%s : Unsupported major.minor version %u.%u", 2828 name->as_C_string(), 2829 major_version, 2830 minor_version); 2831 } 2832 return nullHandle; 2833 } 2834 2835 _major_version = major_version; 2836 _minor_version = minor_version; 2837 2838 2839 // Check if verification needs to be relaxed for this class file 2840 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 2841 _relax_verify = Verifier::relax_verify_for(class_loader()); 2842 2843 // Constant pool 2844 constantPoolHandle cp = parse_constant_pool(class_loader, CHECK_(nullHandle)); 2845 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up. 2846 2847 int cp_size = cp->length(); 2848 2849 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len 2850 2851 // Access flags 2852 AccessFlags access_flags; 2853 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 2854 2855 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 2856 // Set abstract bit for old class files for backward compatibility 2857 flags |= JVM_ACC_ABSTRACT; 2858 } 2859 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); 2860 access_flags.set_flags(flags); 2861 2862 // This class and superclass 2863 instanceKlassHandle super_klass; 2864 u2 this_class_index = cfs->get_u2_fast(); 2865 check_property( 2866 valid_cp_range(this_class_index, cp_size) && 2867 cp->tag_at(this_class_index).is_unresolved_klass(), 2868 "Invalid this class index %u in constant pool in class file %s", 2869 this_class_index, CHECK_(nullHandle)); 2870 2871 Symbol* class_name = cp->unresolved_klass_at(this_class_index); 2872 assert(class_name != NULL, "class_name can't be null"); 2873 2874 // It's important to set parsed_name *before* resolving the super class. 2875 // (it's used for cleanup by the caller if parsing fails) 2876 parsed_name = class_name; 2877 // parsed_name is returned and can be used if there's an error, so add to 2878 // its reference count. Caller will decrement the refcount. 2879 parsed_name->increment_refcount(); 2880 2881 // Update _class_name which could be null previously to be class_name 2882 _class_name = class_name; 2883 2884 // Don't need to check whether this class name is legal or not. 2885 // It has been checked when constant pool is parsed. 2886 // However, make sure it is not an array type. 2887 if (_need_verify) { 2888 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 2889 "Bad class name in class file %s", 2890 CHECK_(nullHandle)); 2891 } 2892 2893 klassOop preserve_this_klass; // for storing result across HandleMark 2894 2895 // release all handles when parsing is done 2896 { HandleMark hm(THREAD); 2897 2898 // Checks if name in class file matches requested name 2899 if (name != NULL && class_name != name) { 2900 ResourceMark rm(THREAD); 2901 Exceptions::fthrow( 2902 THREAD_AND_LOCATION, 2903 vmSymbols::java_lang_NoClassDefFoundError(), 2904 "%s (wrong name: %s)", 2905 name->as_C_string(), 2906 class_name->as_C_string() 2907 ); 2908 return nullHandle; 2909 } 2910 2911 if (TraceClassLoadingPreorder) { 2912 tty->print("[Loading %s", name->as_klass_external_name()); 2913 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); 2914 tty->print_cr("]"); 2915 } 2916 2917 u2 super_class_index = cfs->get_u2_fast(); 2918 if (super_class_index == 0) { 2919 check_property(class_name == vmSymbols::java_lang_Object(), 2920 "Invalid superclass index %u in class file %s", 2921 super_class_index, 2922 CHECK_(nullHandle)); 2923 } else { 2924 check_property(valid_cp_range(super_class_index, cp_size) && 2925 is_klass_reference(cp, super_class_index), 2926 "Invalid superclass index %u in class file %s", 2927 super_class_index, 2928 CHECK_(nullHandle)); 2929 // The class name should be legal because it is checked when parsing constant pool. 2930 // However, make sure it is not an array type. 2931 bool is_array = false; 2932 if (cp->tag_at(super_class_index).is_klass()) { 2933 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); 2934 if (_need_verify) 2935 is_array = super_klass->oop_is_array(); 2936 } else if (_need_verify) { 2937 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 2938 } 2939 if (_need_verify) { 2940 guarantee_property(!is_array, 2941 "Bad superclass name in class file %s", CHECK_(nullHandle)); 2942 } 2943 } 2944 2945 // Interfaces 2946 u2 itfs_len = cfs->get_u2_fast(); 2947 objArrayHandle local_interfaces; 2948 if (itfs_len == 0) { 2949 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); 2950 } else { 2951 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); 2952 } 2953 2954 u2 java_fields_count = 0; 2955 // Fields (offsets are filled in later) 2956 FieldAllocationCount fac; 2957 objArrayHandle fields_annotations; 2958 typeArrayHandle fields = parse_fields(class_name, cp, access_flags.is_interface(), &fac, &fields_annotations, 2959 &java_fields_count, 2960 CHECK_(nullHandle)); 2961 // Methods 2962 bool has_final_method = false; 2963 AccessFlags promoted_flags; 2964 promoted_flags.set_flags(0); 2965 // These need to be oop pointers because they are allocated lazily 2966 // inside parse_methods inside a nested HandleMark 2967 objArrayOop methods_annotations_oop = NULL; 2968 objArrayOop methods_parameter_annotations_oop = NULL; 2969 objArrayOop methods_default_annotations_oop = NULL; 2970 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), 2971 &promoted_flags, 2972 &has_final_method, 2973 &methods_annotations_oop, 2974 &methods_parameter_annotations_oop, 2975 &methods_default_annotations_oop, 2976 CHECK_(nullHandle)); 2977 2978 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); 2979 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); 2980 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); 2981 2982 // We check super class after class file is parsed and format is checked 2983 if (super_class_index > 0 && super_klass.is_null()) { 2984 Symbol* sk = cp->klass_name_at(super_class_index); 2985 if (access_flags.is_interface()) { 2986 // Before attempting to resolve the superclass, check for class format 2987 // errors not checked yet. 2988 guarantee_property(sk == vmSymbols::java_lang_Object(), 2989 "Interfaces must have java.lang.Object as superclass in class file %s", 2990 CHECK_(nullHandle)); 2991 } 2992 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, 2993 sk, 2994 class_loader, 2995 protection_domain, 2996 true, 2997 CHECK_(nullHandle)); 2998 2999 KlassHandle kh (THREAD, k); 3000 super_klass = instanceKlassHandle(THREAD, kh()); 3001 if (LinkWellKnownClasses) // my super class is well known to me 3002 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve 3003 } 3004 if (super_klass.not_null()) { 3005 if (super_klass->is_interface()) { 3006 ResourceMark rm(THREAD); 3007 Exceptions::fthrow( 3008 THREAD_AND_LOCATION, 3009 vmSymbols::java_lang_IncompatibleClassChangeError(), 3010 "class %s has interface %s as super class", 3011 class_name->as_klass_external_name(), 3012 super_klass->external_name() 3013 ); 3014 return nullHandle; 3015 } 3016 // Make sure super class is not final 3017 if (super_klass->is_final()) { 3018 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); 3019 } 3020 } 3021 3022 // Compute the transitive list of all unique interfaces implemented by this class 3023 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); 3024 3025 // sort methods 3026 typeArrayHandle method_ordering = sort_methods(methods, 3027 methods_annotations, 3028 methods_parameter_annotations, 3029 methods_default_annotations, 3030 CHECK_(nullHandle)); 3031 3032 // promote flags from parse_methods() to the klass' flags 3033 access_flags.add_promoted_flags(promoted_flags.as_int()); 3034 3035 // Size of Java vtable (in words) 3036 int vtable_size = 0; 3037 int itable_size = 0; 3038 int num_miranda_methods = 0; 3039 3040 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, 3041 num_miranda_methods, 3042 super_klass(), 3043 methods(), 3044 access_flags, 3045 class_loader, 3046 class_name, 3047 local_interfaces(), 3048 CHECK_(nullHandle)); 3049 3050 // Size of Java itable (in words) 3051 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); 3052 3053 // Field size and offset computation 3054 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); 3055#ifndef PRODUCT 3056 int orig_nonstatic_field_size = 0; 3057#endif 3058 int static_field_size = 0; 3059 int next_static_oop_offset; 3060 int next_static_double_offset; 3061 int next_static_word_offset; 3062 int next_static_short_offset; 3063 int next_static_byte_offset; 3064 int next_static_type_offset; 3065 int next_nonstatic_oop_offset; 3066 int next_nonstatic_double_offset; 3067 int next_nonstatic_word_offset; 3068 int next_nonstatic_short_offset; 3069 int next_nonstatic_byte_offset; 3070 int next_nonstatic_type_offset; 3071 int first_nonstatic_oop_offset; 3072 int first_nonstatic_field_offset; 3073 int next_nonstatic_field_offset; 3074 3075 // Calculate the starting byte offsets 3076 next_static_oop_offset = instanceMirrorKlass::offset_of_static_fields(); 3077 next_static_double_offset = next_static_oop_offset + 3078 (fac.count[STATIC_OOP] * heapOopSize); 3079 if ( fac.count[STATIC_DOUBLE] && 3080 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3081 Universe::field_type_should_be_aligned(T_LONG)) ) { 3082 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3083 } 3084 3085 next_static_word_offset = next_static_double_offset + 3086 (fac.count[STATIC_DOUBLE] * BytesPerLong); 3087 next_static_short_offset = next_static_word_offset + 3088 (fac.count[STATIC_WORD] * BytesPerInt); 3089 next_static_byte_offset = next_static_short_offset + 3090 (fac.count[STATIC_SHORT] * BytesPerShort); 3091 next_static_type_offset = align_size_up((next_static_byte_offset + 3092 fac.count[STATIC_BYTE] ), wordSize ); 3093 static_field_size = (next_static_type_offset - 3094 next_static_oop_offset) / wordSize; 3095 3096 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + 3097 nonstatic_field_size * heapOopSize; 3098 next_nonstatic_field_offset = first_nonstatic_field_offset; 3099 3100 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE]; 3101 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD]; 3102 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT]; 3103 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE]; 3104 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP]; 3105 3106 bool super_has_nonstatic_fields = 3107 (super_klass() != NULL && super_klass->has_nonstatic_fields()); 3108 bool has_nonstatic_fields = super_has_nonstatic_fields || 3109 ((nonstatic_double_count + nonstatic_word_count + 3110 nonstatic_short_count + nonstatic_byte_count + 3111 nonstatic_oop_count) != 0); 3112 3113 3114 // Prepare list of oops for oop map generation. 3115 int* nonstatic_oop_offsets; 3116 unsigned int* nonstatic_oop_counts; 3117 unsigned int nonstatic_oop_map_count = 0; 3118 3119 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3120 THREAD, int, nonstatic_oop_count + 1); 3121 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3122 THREAD, unsigned int, nonstatic_oop_count + 1); 3123 3124 first_nonstatic_oop_offset = 0; // will be set for first oop field 3125 3126#ifndef PRODUCT 3127 if( PrintCompactFieldsSavings ) { 3128 next_nonstatic_double_offset = next_nonstatic_field_offset + 3129 (nonstatic_oop_count * heapOopSize); 3130 if ( nonstatic_double_count > 0 ) { 3131 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); 3132 } 3133 next_nonstatic_word_offset = next_nonstatic_double_offset + 3134 (nonstatic_double_count * BytesPerLong); 3135 next_nonstatic_short_offset = next_nonstatic_word_offset + 3136 (nonstatic_word_count * BytesPerInt); 3137 next_nonstatic_byte_offset = next_nonstatic_short_offset + 3138 (nonstatic_short_count * BytesPerShort); 3139 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + 3140 nonstatic_byte_count ), heapOopSize ); 3141 orig_nonstatic_field_size = nonstatic_field_size + 3142 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); 3143 } 3144#endif 3145 bool compact_fields = CompactFields; 3146 int allocation_style = FieldsAllocationStyle; 3147 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3148 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3149 allocation_style = 1; // Optimistic 3150 } 3151 3152 // The next classes have predefined hard-coded fields offsets 3153 // (see in JavaClasses::compute_hard_coded_offsets()). 3154 // Use default fields allocation order for them. 3155 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && 3156 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3157 class_name == vmSymbols::java_lang_Class() || 3158 class_name == vmSymbols::java_lang_ClassLoader() || 3159 class_name == vmSymbols::java_lang_ref_Reference() || 3160 class_name == vmSymbols::java_lang_ref_SoftReference() || 3161 class_name == vmSymbols::java_lang_StackTraceElement() || 3162 class_name == vmSymbols::java_lang_String() || 3163 class_name == vmSymbols::java_lang_Throwable() || 3164 class_name == vmSymbols::java_lang_Boolean() || 3165 class_name == vmSymbols::java_lang_Character() || 3166 class_name == vmSymbols::java_lang_Float() || 3167 class_name == vmSymbols::java_lang_Double() || 3168 class_name == vmSymbols::java_lang_Byte() || 3169 class_name == vmSymbols::java_lang_Short() || 3170 class_name == vmSymbols::java_lang_Integer() || 3171 class_name == vmSymbols::java_lang_Long())) { 3172 allocation_style = 0; // Allocate oops first 3173 compact_fields = false; // Don't compact fields 3174 } 3175 3176 if( allocation_style == 0 ) { 3177 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes 3178 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3179 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3180 (nonstatic_oop_count * heapOopSize); 3181 } else if( allocation_style == 1 ) { 3182 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops 3183 next_nonstatic_double_offset = next_nonstatic_field_offset; 3184 } else if( allocation_style == 2 ) { 3185 // Fields allocation: oops fields in super and sub classes are together. 3186 if( nonstatic_field_size > 0 && super_klass() != NULL && 3187 super_klass->nonstatic_oop_map_size() > 0 ) { 3188 int map_count = super_klass->nonstatic_oop_map_count(); 3189 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); 3190 OopMapBlock* last_map = first_map + map_count - 1; 3191 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3192 if (next_offset == next_nonstatic_field_offset) { 3193 allocation_style = 0; // allocate oops first 3194 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3195 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3196 (nonstatic_oop_count * heapOopSize); 3197 } 3198 } 3199 if( allocation_style == 2 ) { 3200 allocation_style = 1; // allocate oops last 3201 next_nonstatic_double_offset = next_nonstatic_field_offset; 3202 } 3203 } else { 3204 ShouldNotReachHere(); 3205 } 3206 3207 int nonstatic_oop_space_count = 0; 3208 int nonstatic_word_space_count = 0; 3209 int nonstatic_short_space_count = 0; 3210 int nonstatic_byte_space_count = 0; 3211 int nonstatic_oop_space_offset; 3212 int nonstatic_word_space_offset; 3213 int nonstatic_short_space_offset; 3214 int nonstatic_byte_space_offset; 3215 3216 if( nonstatic_double_count > 0 ) { 3217 int offset = next_nonstatic_double_offset; 3218 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3219 if( compact_fields && offset != next_nonstatic_double_offset ) { 3220 // Allocate available fields into the gap before double field. 3221 int length = next_nonstatic_double_offset - offset; 3222 assert(length == BytesPerInt, ""); 3223 nonstatic_word_space_offset = offset; 3224 if( nonstatic_word_count > 0 ) { 3225 nonstatic_word_count -= 1; 3226 nonstatic_word_space_count = 1; // Only one will fit 3227 length -= BytesPerInt; 3228 offset += BytesPerInt; 3229 } 3230 nonstatic_short_space_offset = offset; 3231 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { 3232 nonstatic_short_count -= 1; 3233 nonstatic_short_space_count += 1; 3234 length -= BytesPerShort; 3235 offset += BytesPerShort; 3236 } 3237 nonstatic_byte_space_offset = offset; 3238 while( length > 0 && nonstatic_byte_count > 0 ) { 3239 nonstatic_byte_count -= 1; 3240 nonstatic_byte_space_count += 1; 3241 length -= 1; 3242 } 3243 // Allocate oop field in the gap if there are no other fields for that. 3244 nonstatic_oop_space_offset = offset; 3245 if( length >= heapOopSize && nonstatic_oop_count > 0 && 3246 allocation_style != 0 ) { // when oop fields not first 3247 nonstatic_oop_count -= 1; 3248 nonstatic_oop_space_count = 1; // Only one will fit 3249 length -= heapOopSize; 3250 offset += heapOopSize; 3251 } 3252 } 3253 } 3254 3255 next_nonstatic_word_offset = next_nonstatic_double_offset + 3256 (nonstatic_double_count * BytesPerLong); 3257 next_nonstatic_short_offset = next_nonstatic_word_offset + 3258 (nonstatic_word_count * BytesPerInt); 3259 next_nonstatic_byte_offset = next_nonstatic_short_offset + 3260 (nonstatic_short_count * BytesPerShort); 3261 3262 int notaligned_offset; 3263 if( allocation_style == 0 ) { 3264 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; 3265 } else { // allocation_style == 1 3266 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; 3267 if( nonstatic_oop_count > 0 ) { 3268 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3269 } 3270 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3271 } 3272 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); 3273 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset 3274 - first_nonstatic_field_offset)/heapOopSize); 3275 3276 // Iterate over fields again and compute correct offsets. 3277 // The field allocation type was temporarily stored in the offset slot. 3278 // oop fields are located before non-oop fields (static and non-static). 3279 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3280 int real_offset; 3281 FieldAllocationType atype = (FieldAllocationType) fs.offset(); 3282 switch (atype) { 3283 case STATIC_OOP: 3284 real_offset = next_static_oop_offset; 3285 next_static_oop_offset += heapOopSize; 3286 break; 3287 case STATIC_BYTE: 3288 real_offset = next_static_byte_offset; 3289 next_static_byte_offset += 1; 3290 break; 3291 case STATIC_SHORT: 3292 real_offset = next_static_short_offset; 3293 next_static_short_offset += BytesPerShort; 3294 break; 3295 case STATIC_WORD: 3296 real_offset = next_static_word_offset; 3297 next_static_word_offset += BytesPerInt; 3298 break; 3299 case STATIC_DOUBLE: 3300 real_offset = next_static_double_offset; 3301 next_static_double_offset += BytesPerLong; 3302 break; 3303 case NONSTATIC_OOP: 3304 if( nonstatic_oop_space_count > 0 ) { 3305 real_offset = nonstatic_oop_space_offset; 3306 nonstatic_oop_space_offset += heapOopSize; 3307 nonstatic_oop_space_count -= 1; 3308 } else { 3309 real_offset = next_nonstatic_oop_offset; 3310 next_nonstatic_oop_offset += heapOopSize; 3311 } 3312 // Update oop maps 3313 if( nonstatic_oop_map_count > 0 && 3314 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3315 real_offset - 3316 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3317 heapOopSize ) { 3318 // Extend current oop map 3319 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3320 } else { 3321 // Create new oop map 3322 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3323 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3324 nonstatic_oop_map_count += 1; 3325 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3326 first_nonstatic_oop_offset = real_offset; 3327 } 3328 } 3329 break; 3330 case NONSTATIC_BYTE: 3331 if( nonstatic_byte_space_count > 0 ) { 3332 real_offset = nonstatic_byte_space_offset; 3333 nonstatic_byte_space_offset += 1; 3334 nonstatic_byte_space_count -= 1; 3335 } else { 3336 real_offset = next_nonstatic_byte_offset; 3337 next_nonstatic_byte_offset += 1; 3338 } 3339 break; 3340 case NONSTATIC_SHORT: 3341 if( nonstatic_short_space_count > 0 ) { 3342 real_offset = nonstatic_short_space_offset; 3343 nonstatic_short_space_offset += BytesPerShort; 3344 nonstatic_short_space_count -= 1; 3345 } else { 3346 real_offset = next_nonstatic_short_offset; 3347 next_nonstatic_short_offset += BytesPerShort; 3348 } 3349 break; 3350 case NONSTATIC_WORD: 3351 if( nonstatic_word_space_count > 0 ) { 3352 real_offset = nonstatic_word_space_offset; 3353 nonstatic_word_space_offset += BytesPerInt; 3354 nonstatic_word_space_count -= 1; 3355 } else { 3356 real_offset = next_nonstatic_word_offset; 3357 next_nonstatic_word_offset += BytesPerInt; 3358 } 3359 break; 3360 case NONSTATIC_DOUBLE: 3361 real_offset = next_nonstatic_double_offset; 3362 next_nonstatic_double_offset += BytesPerLong; 3363 break; 3364 default: 3365 ShouldNotReachHere(); 3366 } 3367 fs.set_offset(real_offset); 3368 } 3369 3370 // Size of instances 3371 int instance_size; 3372 3373 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); 3374 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); 3375 3376 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value"); 3377 3378 // Number of non-static oop map blocks allocated at end of klass. 3379 const unsigned int total_oop_map_count = 3380 compute_oop_map_count(super_klass, nonstatic_oop_map_count, 3381 first_nonstatic_oop_offset); 3382 3383 // Compute reference type 3384 ReferenceType rt; 3385 if (super_klass() == NULL) { 3386 rt = REF_NONE; 3387 } else { 3388 rt = super_klass->reference_type(); 3389 } 3390 3391 // We can now create the basic klassOop for this klass 3392 klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size, 3393 static_field_size, 3394 total_oop_map_count, 3395 access_flags, 3396 rt, host_klass, 3397 CHECK_(nullHandle)); 3398 instanceKlassHandle this_klass (THREAD, ik); 3399 3400 assert(this_klass->static_field_size() == static_field_size, "sanity"); 3401 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, 3402 "sanity"); 3403 3404 // Fill in information already parsed 3405 this_klass->set_should_verify_class(verify); 3406 jint lh = Klass::instance_layout_helper(instance_size, false); 3407 this_klass->set_layout_helper(lh); 3408 assert(this_klass->oop_is_instance(), "layout is correct"); 3409 assert(this_klass->size_helper() == instance_size, "correct size_helper"); 3410 // Not yet: supers are done below to support the new subtype-checking fields 3411 //this_klass->set_super(super_klass()); 3412 this_klass->set_class_loader(class_loader()); 3413 this_klass->set_nonstatic_field_size(nonstatic_field_size); 3414 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); 3415 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]); 3416 cp->set_pool_holder(this_klass()); 3417 error_handler.set_in_error(false); // turn off error handler for cp 3418 this_klass->set_constants(cp()); 3419 this_klass->set_local_interfaces(local_interfaces()); 3420 this_klass->set_fields(fields(), java_fields_count); 3421 this_klass->set_methods(methods()); 3422 if (has_final_method) { 3423 this_klass->set_has_final_method(); 3424 } 3425 this_klass->set_method_ordering(method_ordering()); 3426 // The instanceKlass::_methods_jmethod_ids cache and the 3427 // instanceKlass::_methods_cached_itable_indices cache are 3428 // both managed on the assumption that the initial cache 3429 // size is equal to the number of methods in the class. If 3430 // that changes, then instanceKlass::idnum_can_increment() 3431 // has to be changed accordingly. 3432 this_klass->set_initial_method_idnum(methods->length()); 3433 this_klass->set_name(cp->klass_name_at(this_class_index)); 3434 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself 3435 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve 3436 this_klass->set_protection_domain(protection_domain()); 3437 this_klass->set_fields_annotations(fields_annotations()); 3438 this_klass->set_methods_annotations(methods_annotations()); 3439 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); 3440 this_klass->set_methods_default_annotations(methods_default_annotations()); 3441 3442 this_klass->set_minor_version(minor_version); 3443 this_klass->set_major_version(major_version); 3444 3445 // Set up methodOop::intrinsic_id as soon as we know the names of methods. 3446 // (We used to do this lazily, but now we query it in Rewriter, 3447 // which is eagerly done for every method, so we might as well do it now, 3448 // when everything is fresh in memory.) 3449 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) { 3450 for (int j = 0; j < methods->length(); j++) { 3451 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); 3452 } 3453 } 3454 3455 if (cached_class_file_bytes != NULL) { 3456 // JVMTI: we have an instanceKlass now, tell it about the cached bytes 3457 this_klass->set_cached_class_file(cached_class_file_bytes, 3458 cached_class_file_length); 3459 } 3460 3461 // Miranda methods 3462 if ((num_miranda_methods > 0) || 3463 // if this class introduced new miranda methods or 3464 (super_klass.not_null() && (super_klass->has_miranda_methods())) 3465 // super class exists and this class inherited miranda methods 3466 ) { 3467 this_klass->set_has_miranda_methods(); // then set a flag 3468 } 3469 3470 // Additional attributes 3471 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); 3472 3473 // Make sure this is the end of class file stream 3474 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); 3475 3476 // VerifyOops believes that once this has been set, the object is completely loaded. 3477 // Compute transitive closure of interfaces this class implements 3478 this_klass->set_transitive_interfaces(transitive_interfaces()); 3479 3480 // Fill in information needed to compute superclasses. 3481 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); 3482 3483 // Initialize itable offset tables 3484 klassItable::setup_itable_offset_table(this_klass); 3485 3486 // Do final class setup 3487 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); 3488 3489 set_precomputed_flags(this_klass); 3490 3491 // reinitialize modifiers, using the InnerClasses attribute 3492 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); 3493 this_klass->set_modifier_flags(computed_modifiers); 3494 3495 // check if this class can access its super class 3496 check_super_class_access(this_klass, CHECK_(nullHandle)); 3497 3498 // check if this class can access its superinterfaces 3499 check_super_interface_access(this_klass, CHECK_(nullHandle)); 3500 3501 // check if this class overrides any final method 3502 check_final_method_override(this_klass, CHECK_(nullHandle)); 3503 3504 // check that if this class is an interface then it doesn't have static methods 3505 if (this_klass->is_interface()) { 3506 check_illegal_static_method(this_klass, CHECK_(nullHandle)); 3507 } 3508 3509 // Allocate mirror and initialize static fields 3510 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle)); 3511 3512 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), 3513 false /* not shared class */); 3514 3515 if (TraceClassLoading) { 3516 // print in a single call to reduce interleaving of output 3517 if (cfs->source() != NULL) { 3518 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), 3519 cfs->source()); 3520 } else if (class_loader.is_null()) { 3521 if (THREAD->is_Java_thread()) { 3522 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); 3523 tty->print("[Loaded %s by instance of %s]\n", 3524 this_klass->external_name(), 3525 instanceKlass::cast(caller)->external_name()); 3526 } else { 3527 tty->print("[Loaded %s]\n", this_klass->external_name()); 3528 } 3529 } else { 3530 ResourceMark rm; 3531 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), 3532 instanceKlass::cast(class_loader->klass())->external_name()); 3533 } 3534 } 3535 3536 if (TraceClassResolution) { 3537 // print out the superclass. 3538 const char * from = Klass::cast(this_klass())->external_name(); 3539 if (this_klass->java_super() != NULL) { 3540 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); 3541 } 3542 // print out each of the interface classes referred to by this class. 3543 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); 3544 if (!local_interfaces.is_null()) { 3545 int length = local_interfaces->length(); 3546 for (int i = 0; i < length; i++) { 3547 klassOop k = klassOop(local_interfaces->obj_at(i)); 3548 instanceKlass* to_class = instanceKlass::cast(k); 3549 const char * to = to_class->external_name(); 3550 tty->print("RESOLVE %s %s (interface)\n", from, to); 3551 } 3552 } 3553 } 3554 3555#ifndef PRODUCT 3556 if( PrintCompactFieldsSavings ) { 3557 if( nonstatic_field_size < orig_nonstatic_field_size ) { 3558 tty->print("[Saved %d of %d bytes in %s]\n", 3559 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, 3560 orig_nonstatic_field_size*heapOopSize, 3561 this_klass->external_name()); 3562 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { 3563 tty->print("[Wasted %d over %d bytes in %s]\n", 3564 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, 3565 orig_nonstatic_field_size*heapOopSize, 3566 this_klass->external_name()); 3567 } 3568 } 3569#endif 3570 3571 // preserve result across HandleMark 3572 preserve_this_klass = this_klass(); 3573 } 3574 3575 // Create new handle outside HandleMark 3576 instanceKlassHandle this_klass (THREAD, preserve_this_klass); 3577 debug_only(this_klass->as_klassOop()->verify();) 3578 3579 return this_klass; 3580} 3581 3582 3583unsigned int 3584ClassFileParser::compute_oop_map_count(instanceKlassHandle super, 3585 unsigned int nonstatic_oop_map_count, 3586 int first_nonstatic_oop_offset) { 3587 unsigned int map_count = 3588 super.is_null() ? 0 : super->nonstatic_oop_map_count(); 3589 if (nonstatic_oop_map_count > 0) { 3590 // We have oops to add to map 3591 if (map_count == 0) { 3592 map_count = nonstatic_oop_map_count; 3593 } else { 3594 // Check whether we should add a new map block or whether the last one can 3595 // be extended 3596 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3597 OopMapBlock* const last_map = first_map + map_count - 1; 3598 3599 int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3600 if (next_offset == first_nonstatic_oop_offset) { 3601 // There is no gap bettwen superklass's last oop field and first 3602 // local oop field, merge maps. 3603 nonstatic_oop_map_count -= 1; 3604 } else { 3605 // Superklass didn't end with a oop field, add extra maps 3606 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3607 } 3608 map_count += nonstatic_oop_map_count; 3609 } 3610 } 3611 return map_count; 3612} 3613 3614 3615void ClassFileParser::fill_oop_maps(instanceKlassHandle k, 3616 unsigned int nonstatic_oop_map_count, 3617 int* nonstatic_oop_offsets, 3618 unsigned int* nonstatic_oop_counts) { 3619 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 3620 const instanceKlass* const super = k->superklass(); 3621 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 3622 if (super_count > 0) { 3623 // Copy maps from superklass 3624 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 3625 for (unsigned int i = 0; i < super_count; ++i) { 3626 *this_oop_map++ = *super_oop_map++; 3627 } 3628 } 3629 3630 if (nonstatic_oop_map_count > 0) { 3631 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 3632 // The counts differ because there is no gap between superklass's last oop 3633 // field and the first local oop field. Extend the last oop map copied 3634 // from the superklass instead of creating new one. 3635 nonstatic_oop_map_count--; 3636 nonstatic_oop_offsets++; 3637 this_oop_map--; 3638 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 3639 this_oop_map++; 3640 } 3641 3642 // Add new map blocks, fill them 3643 while (nonstatic_oop_map_count-- > 0) { 3644 this_oop_map->set_offset(*nonstatic_oop_offsets++); 3645 this_oop_map->set_count(*nonstatic_oop_counts++); 3646 this_oop_map++; 3647 } 3648 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 3649 this_oop_map, "sanity"); 3650 } 3651} 3652 3653 3654void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { 3655 klassOop super = k->super(); 3656 3657 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 3658 // in which case we don't have to register objects as finalizable 3659 if (!_has_empty_finalizer) { 3660 if (_has_finalizer || 3661 (super != NULL && super->klass_part()->has_finalizer())) { 3662 k->set_has_finalizer(); 3663 } 3664 } 3665 3666#ifdef ASSERT 3667 bool f = false; 3668 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), 3669 vmSymbols::void_method_signature()); 3670 if (m != NULL && !m->is_empty_method()) { 3671 f = true; 3672 } 3673 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); 3674#endif 3675 3676 // Check if this klass supports the java.lang.Cloneable interface 3677 if (SystemDictionary::Cloneable_klass_loaded()) { 3678 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { 3679 k->set_is_cloneable(); 3680 } 3681 } 3682 3683 // Check if this klass has a vanilla default constructor 3684 if (super == NULL) { 3685 // java.lang.Object has empty default constructor 3686 k->set_has_vanilla_constructor(); 3687 } else { 3688 if (Klass::cast(super)->has_vanilla_constructor() && 3689 _has_vanilla_constructor) { 3690 k->set_has_vanilla_constructor(); 3691 } 3692#ifdef ASSERT 3693 bool v = false; 3694 if (Klass::cast(super)->has_vanilla_constructor()) { 3695 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( 3696), vmSymbols::void_method_signature()); 3697 if (constructor != NULL && constructor->is_vanilla_constructor()) { 3698 v = true; 3699 } 3700 } 3701 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 3702#endif 3703 } 3704 3705 // If it cannot be fast-path allocated, set a bit in the layout helper. 3706 // See documentation of instanceKlass::can_be_fastpath_allocated(). 3707 assert(k->size_helper() > 0, "layout_helper is initialized"); 3708 if ((!RegisterFinalizersAtInit && k->has_finalizer()) 3709 || k->is_abstract() || k->is_interface() 3710 || (k->name() == vmSymbols::java_lang_Class() 3711 && k->class_loader() == NULL) 3712 || k->size_helper() >= FastAllocateSizeLimit) { 3713 // Forbid fast-path allocation. 3714 jint lh = Klass::instance_layout_helper(k->size_helper(), true); 3715 k->set_layout_helper(lh); 3716 } 3717} 3718 3719 3720// utility method for appending and array with check for duplicates 3721 3722void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { 3723 // iterate over new interfaces 3724 for (int i = 0; i < ifs->length(); i++) { 3725 oop e = ifs->obj_at(i); 3726 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); 3727 // check for duplicates 3728 bool duplicate = false; 3729 for (int j = 0; j < index; j++) { 3730 if (result->obj_at(j) == e) { 3731 duplicate = true; 3732 break; 3733 } 3734 } 3735 // add new interface 3736 if (!duplicate) { 3737 result->obj_at_put(index++, e); 3738 } 3739 } 3740} 3741 3742objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { 3743 // Compute maximum size for transitive interfaces 3744 int max_transitive_size = 0; 3745 int super_size = 0; 3746 // Add superclass transitive interfaces size 3747 if (super.not_null()) { 3748 super_size = super->transitive_interfaces()->length(); 3749 max_transitive_size += super_size; 3750 } 3751 // Add local interfaces' super interfaces 3752 int local_size = local_ifs->length(); 3753 for (int i = 0; i < local_size; i++) { 3754 klassOop l = klassOop(local_ifs->obj_at(i)); 3755 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); 3756 } 3757 // Finally add local interfaces 3758 max_transitive_size += local_size; 3759 // Construct array 3760 objArrayHandle result; 3761 if (max_transitive_size == 0) { 3762 // no interfaces, use canonicalized array 3763 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); 3764 } else if (max_transitive_size == super_size) { 3765 // no new local interfaces added, share superklass' transitive interface array 3766 result = objArrayHandle(THREAD, super->transitive_interfaces()); 3767 } else if (max_transitive_size == local_size) { 3768 // only local interfaces added, share local interface array 3769 result = local_ifs; 3770 } else { 3771 objArrayHandle nullHandle; 3772 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); 3773 result = objArrayHandle(THREAD, new_objarray); 3774 int index = 0; 3775 // Copy down from superclass 3776 if (super.not_null()) { 3777 append_interfaces(result, index, super->transitive_interfaces()); 3778 } 3779 // Copy down from local interfaces' superinterfaces 3780 for (int i = 0; i < local_ifs->length(); i++) { 3781 klassOop l = klassOop(local_ifs->obj_at(i)); 3782 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); 3783 } 3784 // Finally add local interfaces 3785 append_interfaces(result, index, local_ifs()); 3786 3787 // Check if duplicates were removed 3788 if (index != max_transitive_size) { 3789 assert(index < max_transitive_size, "just checking"); 3790 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); 3791 for (int i = 0; i < index; i++) { 3792 oop e = result->obj_at(i); 3793 assert(e != NULL, "just checking"); 3794 new_result->obj_at_put(i, e); 3795 } 3796 result = objArrayHandle(THREAD, new_result); 3797 } 3798 } 3799 return result; 3800} 3801 3802 3803void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { 3804 klassOop super = this_klass->super(); 3805 if ((super != NULL) && 3806 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { 3807 ResourceMark rm(THREAD); 3808 Exceptions::fthrow( 3809 THREAD_AND_LOCATION, 3810 vmSymbols::java_lang_IllegalAccessError(), 3811 "class %s cannot access its superclass %s", 3812 this_klass->external_name(), 3813 instanceKlass::cast(super)->external_name() 3814 ); 3815 return; 3816 } 3817} 3818 3819 3820void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { 3821 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); 3822 int lng = local_interfaces->length(); 3823 for (int i = lng - 1; i >= 0; i--) { 3824 klassOop k = klassOop(local_interfaces->obj_at(i)); 3825 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); 3826 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { 3827 ResourceMark rm(THREAD); 3828 Exceptions::fthrow( 3829 THREAD_AND_LOCATION, 3830 vmSymbols::java_lang_IllegalAccessError(), 3831 "class %s cannot access its superinterface %s", 3832 this_klass->external_name(), 3833 instanceKlass::cast(k)->external_name() 3834 ); 3835 return; 3836 } 3837 } 3838} 3839 3840 3841void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { 3842 objArrayHandle methods (THREAD, this_klass->methods()); 3843 int num_methods = methods->length(); 3844 3845 // go thru each method and check if it overrides a final method 3846 for (int index = 0; index < num_methods; index++) { 3847 methodOop m = (methodOop)methods->obj_at(index); 3848 3849 // skip private, static and <init> methods 3850 if ((!m->is_private()) && 3851 (!m->is_static()) && 3852 (m->name() != vmSymbols::object_initializer_name())) { 3853 3854 Symbol* name = m->name(); 3855 Symbol* signature = m->signature(); 3856 klassOop k = this_klass->super(); 3857 methodOop super_m = NULL; 3858 while (k != NULL) { 3859 // skip supers that don't have final methods. 3860 if (k->klass_part()->has_final_method()) { 3861 // lookup a matching method in the super class hierarchy 3862 super_m = instanceKlass::cast(k)->lookup_method(name, signature); 3863 if (super_m == NULL) { 3864 break; // didn't find any match; get out 3865 } 3866 3867 if (super_m->is_final() && 3868 // matching method in super is final 3869 (Reflection::verify_field_access(this_klass->as_klassOop(), 3870 super_m->method_holder(), 3871 super_m->method_holder(), 3872 super_m->access_flags(), false)) 3873 // this class can access super final method and therefore override 3874 ) { 3875 ResourceMark rm(THREAD); 3876 Exceptions::fthrow( 3877 THREAD_AND_LOCATION, 3878 vmSymbols::java_lang_VerifyError(), 3879 "class %s overrides final method %s.%s", 3880 this_klass->external_name(), 3881 name->as_C_string(), 3882 signature->as_C_string() 3883 ); 3884 return; 3885 } 3886 3887 // continue to look from super_m's holder's super. 3888 k = instanceKlass::cast(super_m->method_holder())->super(); 3889 continue; 3890 } 3891 3892 k = k->klass_part()->super(); 3893 } 3894 } 3895 } 3896} 3897 3898 3899// assumes that this_klass is an interface 3900void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { 3901 assert(this_klass->is_interface(), "not an interface"); 3902 objArrayHandle methods (THREAD, this_klass->methods()); 3903 int num_methods = methods->length(); 3904 3905 for (int index = 0; index < num_methods; index++) { 3906 methodOop m = (methodOop)methods->obj_at(index); 3907 // if m is static and not the init method, throw a verify error 3908 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 3909 ResourceMark rm(THREAD); 3910 Exceptions::fthrow( 3911 THREAD_AND_LOCATION, 3912 vmSymbols::java_lang_VerifyError(), 3913 "Illegal static method %s in interface %s", 3914 m->name()->as_C_string(), 3915 this_klass->external_name() 3916 ); 3917 return; 3918 } 3919 } 3920} 3921 3922// utility methods for format checking 3923 3924void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { 3925 if (!_need_verify) { return; } 3926 3927 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 3928 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 3929 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 3930 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 3931 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 3932 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 3933 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 3934 3935 if ((is_abstract && is_final) || 3936 (is_interface && !is_abstract) || 3937 (is_interface && major_gte_15 && (is_super || is_enum)) || 3938 (!is_interface && major_gte_15 && is_annotation)) { 3939 ResourceMark rm(THREAD); 3940 Exceptions::fthrow( 3941 THREAD_AND_LOCATION, 3942 vmSymbols::java_lang_ClassFormatError(), 3943 "Illegal class modifiers in class %s: 0x%X", 3944 _class_name->as_C_string(), flags 3945 ); 3946 return; 3947 } 3948} 3949 3950bool ClassFileParser::has_illegal_visibility(jint flags) { 3951 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 3952 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 3953 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 3954 3955 return ((is_public && is_protected) || 3956 (is_public && is_private) || 3957 (is_protected && is_private)); 3958} 3959 3960bool ClassFileParser::is_supported_version(u2 major, u2 minor) { 3961 u2 max_version = 3962 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : 3963 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); 3964 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 3965 (major <= max_version) && 3966 ((major != max_version) || 3967 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 3968} 3969 3970void ClassFileParser::verify_legal_field_modifiers( 3971 jint flags, bool is_interface, TRAPS) { 3972 if (!_need_verify) { return; } 3973 3974 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 3975 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 3976 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 3977 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 3978 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 3979 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 3980 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 3981 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 3982 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 3983 3984 bool is_illegal = false; 3985 3986 if (is_interface) { 3987 if (!is_public || !is_static || !is_final || is_private || 3988 is_protected || is_volatile || is_transient || 3989 (major_gte_15 && is_enum)) { 3990 is_illegal = true; 3991 } 3992 } else { // not interface 3993 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 3994 is_illegal = true; 3995 } 3996 } 3997 3998 if (is_illegal) { 3999 ResourceMark rm(THREAD); 4000 Exceptions::fthrow( 4001 THREAD_AND_LOCATION, 4002 vmSymbols::java_lang_ClassFormatError(), 4003 "Illegal field modifiers in class %s: 0x%X", 4004 _class_name->as_C_string(), flags); 4005 return; 4006 } 4007} 4008 4009void ClassFileParser::verify_legal_method_modifiers( 4010 jint flags, bool is_interface, Symbol* name, TRAPS) { 4011 if (!_need_verify) { return; } 4012 4013 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4014 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4015 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4016 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4017 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4018 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4019 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4020 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4021 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4022 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4023 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4024 4025 bool is_illegal = false; 4026 4027 if (is_interface) { 4028 if (!is_abstract || !is_public || is_static || is_final || 4029 is_native || (major_gte_15 && (is_synchronized || is_strict))) { 4030 is_illegal = true; 4031 } 4032 } else { // not interface 4033 if (is_initializer) { 4034 if (is_static || is_final || is_synchronized || is_native || 4035 is_abstract || (major_gte_15 && is_bridge)) { 4036 is_illegal = true; 4037 } 4038 } else { // not initializer 4039 if (is_abstract) { 4040 if ((is_final || is_native || is_private || is_static || 4041 (major_gte_15 && (is_synchronized || is_strict)))) { 4042 is_illegal = true; 4043 } 4044 } 4045 if (has_illegal_visibility(flags)) { 4046 is_illegal = true; 4047 } 4048 } 4049 } 4050 4051 if (is_illegal) { 4052 ResourceMark rm(THREAD); 4053 Exceptions::fthrow( 4054 THREAD_AND_LOCATION, 4055 vmSymbols::java_lang_ClassFormatError(), 4056 "Method %s in class %s has illegal modifiers: 0x%X", 4057 name->as_C_string(), _class_name->as_C_string(), flags); 4058 return; 4059 } 4060} 4061 4062void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { 4063 assert(_need_verify, "only called when _need_verify is true"); 4064 int i = 0; 4065 int count = length >> 2; 4066 for (int k=0; k<count; k++) { 4067 unsigned char b0 = buffer[i]; 4068 unsigned char b1 = buffer[i+1]; 4069 unsigned char b2 = buffer[i+2]; 4070 unsigned char b3 = buffer[i+3]; 4071 // For an unsigned char v, 4072 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; 4073 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. 4074 unsigned char res = b0 | b0 - 1 | 4075 b1 | b1 - 1 | 4076 b2 | b2 - 1 | 4077 b3 | b3 - 1; 4078 if (res >= 128) break; 4079 i += 4; 4080 } 4081 for(; i < length; i++) { 4082 unsigned short c; 4083 // no embedded zeros 4084 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); 4085 if(buffer[i] < 128) { 4086 continue; 4087 } 4088 if ((i + 5) < length) { // see if it's legal supplementary character 4089 if (UTF8::is_supplementary_character(&buffer[i])) { 4090 c = UTF8::get_supplementary_character(&buffer[i]); 4091 i += 5; 4092 continue; 4093 } 4094 } 4095 switch (buffer[i] >> 4) { 4096 default: break; 4097 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: 4098 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4099 case 0xC: case 0xD: // 110xxxxx 10xxxxxx 4100 c = (buffer[i] & 0x1F) << 6; 4101 i++; 4102 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { 4103 c += buffer[i] & 0x3F; 4104 if (_major_version <= 47 || c == 0 || c >= 0x80) { 4105 // for classes with major > 47, c must a null or a character in its shortest form 4106 break; 4107 } 4108 } 4109 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4110 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx 4111 c = (buffer[i] & 0xF) << 12; 4112 i += 2; 4113 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { 4114 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); 4115 if (_major_version <= 47 || c >= 0x800) { 4116 // for classes with major > 47, c must be in its shortest form 4117 break; 4118 } 4119 } 4120 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4121 } // end of switch 4122 } // end of for 4123} 4124 4125// Checks if name is a legal class name. 4126void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) { 4127 if (!_need_verify || _relax_verify) { return; } 4128 4129 char buf[fixed_buffer_size]; 4130 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4131 unsigned int length = name->utf8_length(); 4132 bool legal = false; 4133 4134 if (length > 0) { 4135 char* p; 4136 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4137 p = skip_over_field_signature(bytes, false, length, CHECK); 4138 legal = (p != NULL) && ((p - bytes) == (int)length); 4139 } else if (_major_version < JAVA_1_5_VERSION) { 4140 if (bytes[0] != '<') { 4141 p = skip_over_field_name(bytes, true, length); 4142 legal = (p != NULL) && ((p - bytes) == (int)length); 4143 } 4144 } else { 4145 // 4900761: relax the constraints based on JSR202 spec 4146 // Class names may be drawn from the entire Unicode character set. 4147 // Identifiers between '/' must be unqualified names. 4148 // The utf8 string has been verified when parsing cpool entries. 4149 legal = verify_unqualified_name(bytes, length, LegalClass); 4150 } 4151 } 4152 if (!legal) { 4153 ResourceMark rm(THREAD); 4154 Exceptions::fthrow( 4155 THREAD_AND_LOCATION, 4156 vmSymbols::java_lang_ClassFormatError(), 4157 "Illegal class name \"%s\" in class file %s", bytes, 4158 _class_name->as_C_string() 4159 ); 4160 return; 4161 } 4162} 4163 4164// Checks if name is a legal field name. 4165void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) { 4166 if (!_need_verify || _relax_verify) { return; } 4167 4168 char buf[fixed_buffer_size]; 4169 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4170 unsigned int length = name->utf8_length(); 4171 bool legal = false; 4172 4173 if (length > 0) { 4174 if (_major_version < JAVA_1_5_VERSION) { 4175 if (bytes[0] != '<') { 4176 char* p = skip_over_field_name(bytes, false, length); 4177 legal = (p != NULL) && ((p - bytes) == (int)length); 4178 } 4179 } else { 4180 // 4881221: relax the constraints based on JSR202 spec 4181 legal = verify_unqualified_name(bytes, length, LegalField); 4182 } 4183 } 4184 4185 if (!legal) { 4186 ResourceMark rm(THREAD); 4187 Exceptions::fthrow( 4188 THREAD_AND_LOCATION, 4189 vmSymbols::java_lang_ClassFormatError(), 4190 "Illegal field name \"%s\" in class %s", bytes, 4191 _class_name->as_C_string() 4192 ); 4193 return; 4194 } 4195} 4196 4197// Checks if name is a legal method name. 4198void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) { 4199 if (!_need_verify || _relax_verify) { return; } 4200 4201 assert(name != NULL, "method name is null"); 4202 char buf[fixed_buffer_size]; 4203 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4204 unsigned int length = name->utf8_length(); 4205 bool legal = false; 4206 4207 if (length > 0) { 4208 if (bytes[0] == '<') { 4209 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 4210 legal = true; 4211 } 4212 } else if (_major_version < JAVA_1_5_VERSION) { 4213 char* p; 4214 p = skip_over_field_name(bytes, false, length); 4215 legal = (p != NULL) && ((p - bytes) == (int)length); 4216 } else { 4217 // 4881221: relax the constraints based on JSR202 spec 4218 legal = verify_unqualified_name(bytes, length, LegalMethod); 4219 } 4220 } 4221 4222 if (!legal) { 4223 ResourceMark rm(THREAD); 4224 Exceptions::fthrow( 4225 THREAD_AND_LOCATION, 4226 vmSymbols::java_lang_ClassFormatError(), 4227 "Illegal method name \"%s\" in class %s", bytes, 4228 _class_name->as_C_string() 4229 ); 4230 return; 4231 } 4232} 4233 4234 4235// Checks if signature is a legal field signature. 4236void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) { 4237 if (!_need_verify) { return; } 4238 4239 char buf[fixed_buffer_size]; 4240 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4241 unsigned int length = signature->utf8_length(); 4242 char* p = skip_over_field_signature(bytes, false, length, CHECK); 4243 4244 if (p == NULL || (p - bytes) != (int)length) { 4245 throwIllegalSignature("Field", name, signature, CHECK); 4246 } 4247} 4248 4249// Checks if signature is a legal method signature. 4250// Returns number of parameters 4251int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) { 4252 if (!_need_verify) { 4253 // make sure caller's args_size will be less than 0 even for non-static 4254 // method so it will be recomputed in compute_size_of_parameters(). 4255 return -2; 4256 } 4257 4258 unsigned int args_size = 0; 4259 char buf[fixed_buffer_size]; 4260 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4261 unsigned int length = signature->utf8_length(); 4262 char* nextp; 4263 4264 // The first character must be a '(' 4265 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 4266 length--; 4267 // Skip over legal field signatures 4268 nextp = skip_over_field_signature(p, false, length, CHECK_0); 4269 while ((length > 0) && (nextp != NULL)) { 4270 args_size++; 4271 if (p[0] == 'J' || p[0] == 'D') { 4272 args_size++; 4273 } 4274 length -= nextp - p; 4275 p = nextp; 4276 nextp = skip_over_field_signature(p, false, length, CHECK_0); 4277 } 4278 // The first non-signature thing better be a ')' 4279 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 4280 length--; 4281 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 4282 // All internal methods must return void 4283 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 4284 return args_size; 4285 } 4286 } else { 4287 // Now we better just have a return value 4288 nextp = skip_over_field_signature(p, true, length, CHECK_0); 4289 if (nextp && ((int)length == (nextp - p))) { 4290 return args_size; 4291 } 4292 } 4293 } 4294 } 4295 // Report error 4296 throwIllegalSignature("Method", name, signature, CHECK_0); 4297 return 0; 4298} 4299 4300 4301// Unqualified names may not contain the characters '.', ';', '[', or '/'. 4302// Method names also may not contain the characters '<' or '>', unless <init> 4303// or <clinit>. Note that method names may not be <init> or <clinit> in this 4304// method. Because these names have been checked as special cases before 4305// calling this method in verify_legal_method_name. 4306bool ClassFileParser::verify_unqualified_name( 4307 char* name, unsigned int length, int type) { 4308 jchar ch; 4309 4310 for (char* p = name; p != name + length; ) { 4311 ch = *p; 4312 if (ch < 128) { 4313 p++; 4314 if (ch == '.' || ch == ';' || ch == '[' ) { 4315 return false; // do not permit '.', ';', or '[' 4316 } 4317 if (type != LegalClass && ch == '/') { 4318 return false; // do not permit '/' unless it's class name 4319 } 4320 if (type == LegalMethod && (ch == '<' || ch == '>')) { 4321 return false; // do not permit '<' or '>' in method names 4322 } 4323 } else { 4324 char* tmp_p = UTF8::next(p, &ch); 4325 p = tmp_p; 4326 } 4327 } 4328 return true; 4329} 4330 4331 4332// Take pointer to a string. Skip over the longest part of the string that could 4333// be taken as a fieldname. Allow '/' if slash_ok is true. 4334// Return a pointer to just past the fieldname. 4335// Return NULL if no fieldname at all was found, or in the case of slash_ok 4336// being true, we saw consecutive slashes (meaning we were looking for a 4337// qualified path but found something that was badly-formed). 4338char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { 4339 char* p; 4340 jchar ch; 4341 jboolean last_is_slash = false; 4342 jboolean not_first_ch = false; 4343 4344 for (p = name; p != name + length; not_first_ch = true) { 4345 char* old_p = p; 4346 ch = *p; 4347 if (ch < 128) { 4348 p++; 4349 // quick check for ascii 4350 if ((ch >= 'a' && ch <= 'z') || 4351 (ch >= 'A' && ch <= 'Z') || 4352 (ch == '_' || ch == '$') || 4353 (not_first_ch && ch >= '0' && ch <= '9')) { 4354 last_is_slash = false; 4355 continue; 4356 } 4357 if (slash_ok && ch == '/') { 4358 if (last_is_slash) { 4359 return NULL; // Don't permit consecutive slashes 4360 } 4361 last_is_slash = true; 4362 continue; 4363 } 4364 } else { 4365 jint unicode_ch; 4366 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4367 p = tmp_p; 4368 last_is_slash = false; 4369 // Check if ch is Java identifier start or is Java identifier part 4370 // 4672820: call java.lang.Character methods directly without generating separate tables. 4371 EXCEPTION_MARK; 4372 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); 4373 4374 // return value 4375 JavaValue result(T_BOOLEAN); 4376 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4377 JavaCallArguments args; 4378 args.push_int(unicode_ch); 4379 4380 // public static boolean isJavaIdentifierStart(char ch); 4381 JavaCalls::call_static(&result, 4382 klass, 4383 vmSymbols::isJavaIdentifierStart_name(), 4384 vmSymbols::int_bool_signature(), 4385 &args, 4386 THREAD); 4387 4388 if (HAS_PENDING_EXCEPTION) { 4389 CLEAR_PENDING_EXCEPTION; 4390 return 0; 4391 } 4392 if (result.get_jboolean()) { 4393 continue; 4394 } 4395 4396 if (not_first_ch) { 4397 // public static boolean isJavaIdentifierPart(char ch); 4398 JavaCalls::call_static(&result, 4399 klass, 4400 vmSymbols::isJavaIdentifierPart_name(), 4401 vmSymbols::int_bool_signature(), 4402 &args, 4403 THREAD); 4404 4405 if (HAS_PENDING_EXCEPTION) { 4406 CLEAR_PENDING_EXCEPTION; 4407 return 0; 4408 } 4409 4410 if (result.get_jboolean()) { 4411 continue; 4412 } 4413 } 4414 } 4415 return (not_first_ch) ? old_p : NULL; 4416 } 4417 return (not_first_ch) ? p : NULL; 4418} 4419 4420 4421// Take pointer to a string. Skip over the longest part of the string that could 4422// be taken as a field signature. Allow "void" if void_ok. 4423// Return a pointer to just past the signature. 4424// Return NULL if no legal signature is found. 4425char* ClassFileParser::skip_over_field_signature(char* signature, 4426 bool void_ok, 4427 unsigned int length, 4428 TRAPS) { 4429 unsigned int array_dim = 0; 4430 while (length > 0) { 4431 switch (signature[0]) { 4432 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4433 case JVM_SIGNATURE_BOOLEAN: 4434 case JVM_SIGNATURE_BYTE: 4435 case JVM_SIGNATURE_CHAR: 4436 case JVM_SIGNATURE_SHORT: 4437 case JVM_SIGNATURE_INT: 4438 case JVM_SIGNATURE_FLOAT: 4439 case JVM_SIGNATURE_LONG: 4440 case JVM_SIGNATURE_DOUBLE: 4441 return signature + 1; 4442 case JVM_SIGNATURE_CLASS: { 4443 if (_major_version < JAVA_1_5_VERSION) { 4444 // Skip over the class name if one is there 4445 char* p = skip_over_field_name(signature + 1, true, --length); 4446 4447 // The next character better be a semicolon 4448 if (p && (p - signature) > 1 && p[0] == ';') { 4449 return p + 1; 4450 } 4451 } else { 4452 // 4900761: For class version > 48, any unicode is allowed in class name. 4453 length--; 4454 signature++; 4455 while (length > 0 && signature[0] != ';') { 4456 if (signature[0] == '.') { 4457 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); 4458 } 4459 length--; 4460 signature++; 4461 } 4462 if (signature[0] == ';') { return signature + 1; } 4463 } 4464 4465 return NULL; 4466 } 4467 case JVM_SIGNATURE_ARRAY: 4468 array_dim++; 4469 if (array_dim > 255) { 4470 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4471 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4472 } 4473 // The rest of what's there better be a legal signature 4474 signature++; 4475 length--; 4476 void_ok = false; 4477 break; 4478 4479 default: 4480 return NULL; 4481 } 4482 } 4483 return NULL; 4484} 4485