1 /* 2 * Copyright (c) 1997, 2026, 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 "cds/cdsConfig.hpp" 26 #include "classfile/javaClasses.inline.hpp" 27 #include "classfile/moduleEntry.hpp" 28 #include "classfile/packageEntry.hpp" 29 #include "classfile/stringTable.hpp" 30 #include "classfile/verifier.hpp" 31 #include "classfile/vmClasses.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "interpreter/linkResolver.hpp" 34 #include "jvm.h" 35 #include "logging/log.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/arrayOop.inline.hpp" 40 #include "oops/inlineKlass.inline.hpp" 41 #include "oops/instanceKlass.inline.hpp" 42 #include "oops/klass.inline.hpp" 43 #include "oops/objArrayKlass.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/typeArrayOop.inline.hpp" 47 #include "prims/jvmtiExport.hpp" 48 #include "runtime/fieldDescriptor.inline.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/javaThread.hpp" 52 #include "runtime/reflection.hpp" 53 #include "runtime/signature.hpp" 54 #include "runtime/vframe.inline.hpp" 55 #include "utilities/formatBuffer.hpp" 56 #include "utilities/globalDefinitions.hpp" 57 58 static void trace_class_resolution(oop mirror) { 59 if (mirror == nullptr || java_lang_Class::is_primitive(mirror)) { 60 return; 61 } 62 Klass* to_class = java_lang_Class::as_Klass(mirror); 63 ResourceMark rm; 64 int line_number = -1; 65 const char * source_file = nullptr; 66 Klass* caller = nullptr; 67 JavaThread* jthread = JavaThread::current(); 68 if (jthread->has_last_Java_frame()) { 69 vframeStream vfst(jthread); 70 // skip over any frames belonging to java.lang.Class 71 while (!vfst.at_end() && 72 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 73 vfst.next(); 74 } 75 if (!vfst.at_end()) { 76 // this frame is a likely suspect 77 caller = vfst.method()->method_holder(); 78 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 79 Symbol* s = vfst.method()->method_holder()->source_file_name(); 80 if (s != nullptr) { 81 source_file = s->as_C_string(); 82 } 83 } 84 } 85 if (caller != nullptr) { 86 const char * from = caller->external_name(); 87 const char * to = to_class->external_name(); 88 // print in a single call to reduce interleaving between threads 89 if (source_file != nullptr) { 90 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number); 91 } else { 92 log_debug(class, resolve)("%s %s (reflection)", from, to); 93 } 94 } 95 } 96 97 98 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 99 if (type == T_VOID) { 100 return nullptr; 101 } 102 if (is_reference_type(type)) { 103 // regular objects are not boxed 104 return cast_to_oop(value->l); 105 } 106 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 107 if (result == nullptr) { 108 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 109 } 110 return result; 111 } 112 113 114 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 115 if (box == nullptr) { 116 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 117 } 118 return java_lang_boxing_object::get_value(box, value); 119 } 120 121 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 122 // Note: box is really the unboxed oop. It might even be a Short, etc.! 123 value->l = cast_from_oop<jobject>(box); 124 return T_OBJECT; 125 } 126 127 128 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 129 assert(wide_type != current_type, "widen should not be called with identical types"); 130 switch (wide_type) { 131 case T_BOOLEAN: 132 case T_BYTE: 133 case T_CHAR: 134 break; // fail 135 case T_SHORT: 136 switch (current_type) { 137 case T_BYTE: 138 value->s = (jshort) value->b; 139 return; 140 default: 141 break; 142 } 143 break; // fail 144 case T_INT: 145 switch (current_type) { 146 case T_BYTE: 147 value->i = (jint) value->b; 148 return; 149 case T_CHAR: 150 value->i = (jint) value->c; 151 return; 152 case T_SHORT: 153 value->i = (jint) value->s; 154 return; 155 default: 156 break; 157 } 158 break; // fail 159 case T_LONG: 160 switch (current_type) { 161 case T_BYTE: 162 value->j = (jlong) value->b; 163 return; 164 case T_CHAR: 165 value->j = (jlong) value->c; 166 return; 167 case T_SHORT: 168 value->j = (jlong) value->s; 169 return; 170 case T_INT: 171 value->j = (jlong) value->i; 172 return; 173 default: 174 break; 175 } 176 break; // fail 177 case T_FLOAT: 178 switch (current_type) { 179 case T_BYTE: 180 value->f = (jfloat) value->b; 181 return; 182 case T_CHAR: 183 value->f = (jfloat) value->c; 184 return; 185 case T_SHORT: 186 value->f = (jfloat) value->s; 187 return; 188 case T_INT: 189 value->f = (jfloat) value->i; 190 return; 191 case T_LONG: 192 value->f = (jfloat) value->j; 193 return; 194 default: 195 break; 196 } 197 break; // fail 198 case T_DOUBLE: 199 switch (current_type) { 200 case T_BYTE: 201 value->d = (jdouble) value->b; 202 return; 203 case T_CHAR: 204 value->d = (jdouble) value->c; 205 return; 206 case T_SHORT: 207 value->d = (jdouble) value->s; 208 return; 209 case T_INT: 210 value->d = (jdouble) value->i; 211 return; 212 case T_FLOAT: 213 value->d = (jdouble) value->f; 214 return; 215 case T_LONG: 216 value->d = (jdouble) value->j; 217 return; 218 default: 219 break; 220 } 221 break; // fail 222 default: 223 break; // fail 224 } 225 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 226 } 227 228 229 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 230 if (!a->is_within_bounds(index)) { 231 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 232 } 233 if (a->is_objArray()) { 234 oop o = objArrayOop(a)->obj_at(index, CHECK_(T_ILLEGAL)); // reading from a flat array can throw an OOM 235 value->l = cast_from_oop<jobject>(o); 236 return T_OBJECT; 237 } else { 238 assert(a->is_typeArray(), "just checking"); 239 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 240 switch (type) { 241 case T_BOOLEAN: 242 value->z = typeArrayOop(a)->bool_at(index); 243 break; 244 case T_CHAR: 245 value->c = typeArrayOop(a)->char_at(index); 246 break; 247 case T_FLOAT: 248 value->f = typeArrayOop(a)->float_at(index); 249 break; 250 case T_DOUBLE: 251 value->d = typeArrayOop(a)->double_at(index); 252 break; 253 case T_BYTE: 254 value->b = typeArrayOop(a)->byte_at(index); 255 break; 256 case T_SHORT: 257 value->s = typeArrayOop(a)->short_at(index); 258 break; 259 case T_INT: 260 value->i = typeArrayOop(a)->int_at(index); 261 break; 262 case T_LONG: 263 value->j = typeArrayOop(a)->long_at(index); 264 break; 265 default: 266 return T_ILLEGAL; 267 } 268 return type; 269 } 270 } 271 272 273 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 274 if (!a->is_within_bounds(index)) { 275 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 276 } 277 if (value_type == T_OBJECT) { 278 assert(a->is_objArray(), "just checking"); 279 oop obj = cast_to_oop(value->l); 280 if (a->is_null_free_array() && obj == nullptr) { 281 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "null-restricted array"); 282 } 283 284 if (obj != nullptr) { 285 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 286 if (!obj->is_a(element_klass)) { 287 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 288 } 289 } 290 objArrayOop(a)->obj_at_put(index, obj); 291 } else { 292 assert(a->is_typeArray(), "just checking"); 293 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 294 if (array_type != value_type) { 295 // The widen operation can potentially throw an exception, but cannot block, 296 // so typeArrayOop a is safe if the call succeeds. 297 widen(value, value_type, array_type, CHECK); 298 } 299 switch (array_type) { 300 case T_BOOLEAN: 301 typeArrayOop(a)->bool_at_put(index, value->z); 302 break; 303 case T_CHAR: 304 typeArrayOop(a)->char_at_put(index, value->c); 305 break; 306 case T_FLOAT: 307 typeArrayOop(a)->float_at_put(index, value->f); 308 break; 309 case T_DOUBLE: 310 typeArrayOop(a)->double_at_put(index, value->d); 311 break; 312 case T_BYTE: 313 typeArrayOop(a)->byte_at_put(index, value->b); 314 break; 315 case T_SHORT: 316 typeArrayOop(a)->short_at_put(index, value->s); 317 break; 318 case T_INT: 319 typeArrayOop(a)->int_at_put(index, value->i); 320 break; 321 case T_LONG: 322 typeArrayOop(a)->long_at_put(index, value->j); 323 break; 324 default: 325 THROW(vmSymbols::java_lang_IllegalArgumentException()); 326 } 327 } 328 } 329 330 331 // Conversion 332 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror) { 333 assert(java_lang_Class::is_primitive(basic_type_mirror), 334 "just checking"); 335 return java_lang_Class::primitive_type(basic_type_mirror); 336 } 337 338 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 339 BasicType type = basic_type_mirror_to_basic_type(basic_type_mirror); 340 if (type == T_VOID) { 341 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 342 } 343 else { 344 return Universe::typeArrayKlass(type); 345 } 346 } 347 348 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 349 if (element_mirror == nullptr) { 350 THROW_NULL(vmSymbols::java_lang_NullPointerException()); 351 } 352 if (length < 0) { 353 THROW_MSG_NULL(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length)); 354 } 355 if (java_lang_Class::is_primitive(element_mirror)) { 356 BasicType type = basic_type_mirror_to_basic_type(element_mirror); 357 if (type == T_VOID) { 358 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 359 } 360 return oopFactory::new_typeArray(type, length, CHECK_NULL); 361 } else { 362 Klass* k = java_lang_Class::as_Klass(element_mirror); 363 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 364 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 365 } 366 return oopFactory::new_objArray(k, length, THREAD); 367 } 368 } 369 370 371 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 372 assert(dim_array->is_typeArray(), "just checking"); 373 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 374 375 if (element_mirror == nullptr) { 376 THROW_NULL(vmSymbols::java_lang_NullPointerException()); 377 } 378 379 int len = dim_array->length(); 380 if (len <= 0 || len > MAX_DIM) { 381 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 382 } 383 384 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 385 for (int i = 0; i < len; i++) { 386 int d = dim_array->int_at(i); 387 if (d < 0) { 388 THROW_MSG_NULL(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d)); 389 } 390 dimensions[i] = d; 391 } 392 393 Klass* klass; 394 int dim = len; 395 if (java_lang_Class::is_primitive(element_mirror)) { 396 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 397 } else { 398 klass = java_lang_Class::as_Klass(element_mirror); 399 if (klass->is_array_klass()) { 400 int k_dim = ArrayKlass::cast(klass)->dimension(); 401 if (k_dim + len > MAX_DIM) { 402 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 403 } 404 dim += k_dim; 405 } 406 } 407 klass = klass->array_klass(dim, CHECK_NULL); 408 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 409 assert(obj->is_array(), "just checking"); 410 return arrayOop(obj); 411 } 412 413 414 static bool can_relax_access_check_for(const Klass* accessor, 415 const Klass* accessee, 416 bool classloader_only) { 417 418 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 419 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 420 421 if (RelaxAccessControlCheck && 422 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 423 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) { 424 return classloader_only && 425 Verifier::relax_access_for(accessor_ik->class_loader()) && 426 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 427 accessor_ik->class_loader() == accessee_ik->class_loader(); 428 } 429 430 return false; 431 } 432 433 /* 434 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if: 435 436 Callee T in Callee T in package PT, 437 unnamed module runtime module MT 438 ------------------------------------------------------------------------------------------------ 439 440 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES 441 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES 442 unnamed module: YES 443 Else if (MS can read MT (establish readability) && 444 ((MT exports PT to MS or to all modules) || 445 (MT is open))): YES 446 447 ------------------------------------------------------------------------------------------------ 448 Caller S in unnamed YES Readability exists because unnamed module 449 module UM "reads" all modules 450 if (MT exports PT to UM or to all modules): YES 451 452 ------------------------------------------------------------------------------------------------ 453 454 Note: a loose module is a module that can read all current and future unnamed modules. 455 */ 456 Reflection::VerifyClassAccessResults Reflection::verify_class_access( 457 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) { 458 459 // Verify that current_class can access new_class. If the classloader_only 460 // flag is set, we automatically allow any accesses in which current_class 461 // doesn't have a classloader. 462 if ((current_class == nullptr) || 463 (current_class == new_class) || 464 is_same_class_package(current_class, new_class)) { 465 return ACCESS_OK; 466 } 467 468 // module boundaries 469 if (new_class->is_public()) { 470 // Find the module entry for current_class, the accessor 471 ModuleEntry* module_from = current_class->module(); 472 // Find the module entry for new_class, the accessee 473 ModuleEntry* module_to = new_class->module(); 474 475 // both in same (possibly unnamed) module 476 if (module_from == module_to) { 477 return ACCESS_OK; 478 } 479 480 // Acceptable access to a type in an unnamed module. Note that since 481 // unnamed modules can read all unnamed modules, this also handles the 482 // case where module_from is also unnamed but in a different class loader. 483 if (!module_to->is_named() && 484 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) { 485 return ACCESS_OK; 486 } 487 488 // Establish readability, check if module_from is allowed to read module_to. 489 if (!module_from->can_read(module_to)) { 490 return MODULE_NOT_READABLE; 491 } 492 493 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported 494 if (module_to->is_open()) { 495 return ACCESS_OK; 496 } 497 498 PackageEntry* package_to = new_class->package(); 499 assert(package_to != nullptr, "can not obtain new_class' package"); 500 501 { 502 MutexLocker m1(Module_lock); 503 504 // Once readability is established, if module_to exports T unqualifiedly, 505 // (to all modules), than whether module_from is in the unnamed module 506 // or not does not matter, access is allowed. 507 if (package_to->is_unqual_exported()) { 508 return ACCESS_OK; 509 } 510 511 // Access is allowed if both 1 & 2 hold: 512 // 1. Readability, module_from can read module_to (established above). 513 // 2. Either module_to exports T to module_from qualifiedly. 514 // or 515 // module_to exports T to all unnamed modules and module_from is unnamed. 516 // or 517 // module_to exports T unqualifiedly to all modules (checked above). 518 if (!package_to->is_qexported_to(module_from)) { 519 return TYPE_NOT_EXPORTED; 520 } 521 } 522 return ACCESS_OK; 523 } 524 525 if (can_relax_access_check_for(current_class, new_class, classloader_only)) { 526 return ACCESS_OK; 527 } 528 return OTHER_PROBLEM; 529 } 530 531 // Return an error message specific to the specified Klass*'s and result. 532 // This function must be called from within a block containing a ResourceMark. 533 char* Reflection::verify_class_access_msg(const Klass* current_class, 534 const InstanceKlass* new_class, 535 const VerifyClassAccessResults result) { 536 assert(result != ACCESS_OK, "must be failure result"); 537 char * msg = nullptr; 538 if (result != OTHER_PROBLEM && new_class != nullptr && current_class != nullptr) { 539 // Find the module entry for current_class, the accessor 540 ModuleEntry* module_from = current_class->module(); 541 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE; 542 const char * current_class_name = current_class->external_name(); 543 544 // Find the module entry for new_class, the accessee 545 ModuleEntry* module_to = nullptr; 546 module_to = new_class->module(); 547 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE; 548 const char * new_class_name = new_class->external_name(); 549 550 if (result == MODULE_NOT_READABLE) { 551 assert(module_from->is_named(), "Unnamed modules can read all modules"); 552 if (module_to->is_named()) { 553 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) + 554 strlen(new_class_name) + 2*strlen(module_to_name); 555 msg = NEW_RESOURCE_ARRAY(char, len); 556 jio_snprintf(msg, len, 557 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s", 558 current_class_name, module_from_name, new_class_name, 559 module_to_name, module_from_name, module_to_name); 560 } else { 561 oop module_oop = module_to->module_oop(); 562 assert(module_oop != nullptr, "should have been initialized"); 563 intptr_t identity_hash = module_oop->identity_hash(); 564 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) + 565 strlen(new_class_name) + 2*sizeof(uintx); 566 msg = NEW_RESOURCE_ARRAY(char, len); 567 jio_snprintf(msg, len, 568 "class %s (in module %s) cannot access class %s (in unnamed module @0x%zx) because module %s does not read unnamed module @0x%zx", 569 current_class_name, module_from_name, new_class_name, uintx(identity_hash), 570 module_from_name, uintx(identity_hash)); 571 } 572 573 } else if (result == TYPE_NOT_EXPORTED) { 574 assert(new_class->package() != nullptr, 575 "Unnamed packages are always exported"); 576 const char * package_name = 577 new_class->package()->name()->as_klass_external_name(); 578 assert(module_to->is_named(), "Unnamed modules export all packages"); 579 if (module_from->is_named()) { 580 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) + 581 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name); 582 msg = NEW_RESOURCE_ARRAY(char, len); 583 jio_snprintf(msg, len, 584 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s", 585 current_class_name, module_from_name, new_class_name, 586 module_to_name, module_to_name, package_name, module_from_name); 587 } else { 588 oop module_oop = module_from->module_oop(); 589 assert(module_oop != nullptr, "should have been initialized"); 590 intptr_t identity_hash = module_oop->identity_hash(); 591 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) + 592 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx); 593 msg = NEW_RESOURCE_ARRAY(char, len); 594 jio_snprintf(msg, len, 595 "class %s (in unnamed module @0x%zx) cannot access class %s (in module %s) because module %s does not export %s to unnamed module @0x%zx", 596 current_class_name, uintx(identity_hash), new_class_name, module_to_name, 597 module_to_name, package_name, uintx(identity_hash)); 598 } 599 } else { 600 ShouldNotReachHere(); 601 } 602 } // result != OTHER_PROBLEM... 603 return msg; 604 } 605 606 bool Reflection::verify_member_access(const Klass* current_class, 607 const Klass* resolved_class, 608 const Klass* member_class, 609 AccessFlags access, 610 bool classloader_only, 611 bool protected_restriction, 612 TRAPS) { 613 // Verify that current_class can access a member of member_class, where that 614 // field's access bits are "access". We assume that we've already verified 615 // that current_class can access member_class. 616 // 617 // If the classloader_only flag is set, we automatically allow any accesses 618 // in which current_class doesn't have a classloader. 619 // 620 // "resolved_class" is the runtime type of "member_class". Sometimes we don't 621 // need this distinction (e.g. if all we have is the runtime type, or during 622 // class file parsing when we only care about the static type); in that case 623 // callers should ensure that resolved_class == member_class. 624 // 625 if ((current_class == nullptr) || 626 (current_class == member_class) || 627 access.is_public()) { 628 return true; 629 } 630 631 if (current_class == member_class) { 632 return true; 633 } 634 635 if (access.is_protected()) { 636 if (!protected_restriction) { 637 // See if current_class (or outermost host class) is a subclass of member_class 638 // An interface may not access protected members of j.l.Object 639 if (!current_class->is_interface() && current_class->is_subclass_of(member_class)) { 640 if (access.is_static() || // static fields are ok, see 6622385 641 current_class == resolved_class || 642 member_class == resolved_class || 643 current_class->is_subclass_of(resolved_class) || 644 resolved_class->is_subclass_of(current_class)) { 645 return true; 646 } 647 } 648 } 649 } 650 651 // package access 652 if (!access.is_private() && is_same_class_package(current_class, member_class)) { 653 return true; 654 } 655 656 // private access between different classes needs a nestmate check. 657 if (access.is_private()) { 658 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) { 659 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class)); 660 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class)); 661 // Nestmate access checks may require resolution and validation of the nest-host. 662 // It is up to the caller to check for pending exceptions and handle appropriately. 663 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false); 664 if (access) { 665 guarantee(resolved_class->is_subclass_of(member_class), "must be!"); 666 return true; 667 } 668 } 669 } 670 671 // Check for special relaxations 672 return can_relax_access_check_for(current_class, member_class, classloader_only); 673 } 674 675 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) { 676 return InstanceKlass::cast(class1)->is_same_class_package(class2); 677 } 678 679 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 680 // throw an incompatible class change exception 681 // If inner_is_member, require the inner to be a member of the outer. 682 // If !inner_is_member, require the inner to be hidden (non-member). 683 // Caller is responsible for figuring out in advance which case must be true. 684 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner, 685 bool inner_is_member, TRAPS) { 686 InnerClassesIterator iter(outer); 687 constantPoolHandle cp (THREAD, outer->constants()); 688 for (; !iter.done(); iter.next()) { 689 int ioff = iter.inner_class_info_index(); 690 int ooff = iter.outer_class_info_index(); 691 692 if (inner_is_member && ioff != 0 && ooff != 0) { 693 if (cp->klass_name_at_matches(outer, ooff) && 694 cp->klass_name_at_matches(inner, ioff)) { 695 Klass* o = cp->klass_at(ooff, CHECK); 696 if (o == outer) { 697 Klass* i = cp->klass_at(ioff, CHECK); 698 if (i == inner) { 699 return; 700 } 701 } 702 } 703 } 704 705 if (!inner_is_member && ioff != 0 && ooff == 0 && 706 cp->klass_name_at_matches(inner, ioff)) { 707 Klass* i = cp->klass_at(ioff, CHECK); 708 if (i == inner) { 709 return; 710 } 711 } 712 } 713 714 // 'inner' not declared as an inner klass in outer 715 ResourceMark rm(THREAD); 716 // Names are all known to be < 64k so we know this formatted message is not excessively large. 717 Exceptions::fthrow( 718 THREAD_AND_LOCATION, 719 vmSymbols::java_lang_IncompatibleClassChangeError(), 720 "%s and %s disagree on InnerClasses attribute", 721 outer->external_name(), 722 inner->external_name() 723 ); 724 } 725 726 static objArrayHandle get_parameter_types(const methodHandle& method, 727 int parameter_count, 728 oop* return_type, 729 TRAPS) { 730 objArrayOop m; 731 if (parameter_count == 0) { 732 // Avoid allocating an array for the empty case 733 // Still need to parse the signature for the return type below 734 m = Universe::the_empty_class_array(); 735 } else { 736 // Allocate array holding parameter types (java.lang.Class instances) 737 m = oopFactory::new_objArray(vmClasses::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 738 } 739 objArrayHandle mirrors(THREAD, m); 740 int index = 0; 741 // Collect parameter types 742 ResourceMark rm(THREAD); 743 for (ResolvingSignatureStream ss(method()); !ss.is_done(); ss.next()) { 744 oop mirror = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_(objArrayHandle())); 745 if (log_is_enabled(Debug, class, resolve)) { 746 trace_class_resolution(mirror); 747 } 748 if (!ss.at_return_type()) { 749 mirrors->obj_at_put(index++, mirror); 750 } else if (return_type != nullptr) { 751 // Collect return type as well 752 assert(ss.at_return_type(), "return type should be present"); 753 *return_type = mirror; 754 } 755 } 756 assert(index == parameter_count, "invalid parameter count"); 757 return mirrors; 758 } 759 760 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) { 761 return method->resolved_checked_exceptions(THREAD); 762 } 763 764 static Handle new_type(Symbol* signature, Klass* k, TRAPS) { 765 ResolvingSignatureStream ss(signature, k, false); 766 oop nt = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_NH); 767 return Handle(THREAD, nt); 768 } 769 770 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) { 771 // Allow jdk.internal.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 772 assert(!method()->is_object_constructor() || 773 (for_constant_pool_access || !method()->is_class_initializer()), 774 "should call new_constructor instead"); 775 InstanceKlass* holder = method->method_holder(); 776 int slot = method->method_idnum(); 777 778 Symbol* signature = method->signature(); 779 int parameter_count = ArgumentCount(signature).size(); 780 oop return_type_oop = nullptr; 781 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 782 if (parameter_types.is_null() || return_type_oop == nullptr) return nullptr; 783 784 Handle return_type(THREAD, return_type_oop); 785 786 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 787 assert(!exception_types.is_null(), "cannot return null"); 788 789 Symbol* method_name = method->name(); 790 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 791 Handle name = Handle(THREAD, name_oop); 792 if (name == nullptr) return nullptr; 793 794 const int modifiers = method->access_flags().as_method_flags(); 795 796 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 797 798 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 799 java_lang_reflect_Method::set_slot(mh(), slot); 800 java_lang_reflect_Method::set_name(mh(), name()); 801 java_lang_reflect_Method::set_return_type(mh(), return_type()); 802 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 803 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 804 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 805 java_lang_reflect_Method::set_override(mh(), false); 806 if (method->generic_signature() != nullptr) { 807 Symbol* gs = method->generic_signature(); 808 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 809 java_lang_reflect_Method::set_signature(mh(), sig()); 810 } 811 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 812 java_lang_reflect_Method::set_annotations(mh(), an_oop); 813 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 814 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 815 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 816 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 817 return mh(); 818 } 819 820 821 oop Reflection::new_constructor(const methodHandle& method, TRAPS) { 822 assert(method()->is_object_constructor(), 823 "should call new_method instead"); 824 825 InstanceKlass* holder = method->method_holder(); 826 int slot = method->method_idnum(); 827 828 Symbol* signature = method->signature(); 829 int parameter_count = ArgumentCount(signature).size(); 830 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, nullptr, CHECK_NULL); 831 if (parameter_types.is_null()) return nullptr; 832 833 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 834 assert(!exception_types.is_null(), "cannot return null"); 835 836 const int modifiers = method->access_flags().as_method_flags(); 837 838 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 839 840 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 841 java_lang_reflect_Constructor::set_slot(ch(), slot); 842 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 843 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 844 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 845 java_lang_reflect_Constructor::set_override(ch(), false); 846 if (method->generic_signature() != nullptr) { 847 Symbol* gs = method->generic_signature(); 848 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 849 java_lang_reflect_Constructor::set_signature(ch(), sig()); 850 } 851 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 852 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 853 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 854 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 855 return ch(); 856 } 857 858 859 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 860 Symbol* field_name = fd->name(); 861 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 862 Handle name = Handle(THREAD, name_oop); 863 Symbol* signature = fd->signature(); 864 InstanceKlass* holder = fd->field_holder(); 865 Handle type = new_type(signature, holder, CHECK_NULL); 866 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 867 868 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 869 java_lang_reflect_Field::set_slot(rh(), fd->index()); 870 java_lang_reflect_Field::set_name(rh(), name()); 871 java_lang_reflect_Field::set_type(rh(), type()); 872 873 int flags = 0; 874 if (fd->is_trusted_final()) { 875 flags |= TRUSTED_FINAL; 876 } 877 if (fd->is_null_free_inline_type()) { 878 flags |= NULL_RESTRICTED; 879 } 880 java_lang_reflect_Field::set_flags(rh(), flags); 881 882 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 883 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_field_flags()); 884 java_lang_reflect_Field::set_override(rh(), false); 885 if (fd->has_generic_signature()) { 886 Symbol* gs = fd->generic_signature(); 887 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 888 java_lang_reflect_Field::set_signature(rh(), sig()); 889 } 890 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 891 java_lang_reflect_Field::set_annotations(rh(), an_oop); 892 return rh(); 893 } 894 895 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 896 int flags, TRAPS) { 897 898 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 899 900 if(nullptr != sym) { 901 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 902 java_lang_reflect_Parameter::set_name(rh(), name()); 903 } else { 904 java_lang_reflect_Parameter::set_name(rh(), nullptr); 905 } 906 907 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 908 java_lang_reflect_Parameter::set_executable(rh(), method()); 909 java_lang_reflect_Parameter::set_index(rh(), index); 910 return rh(); 911 } 912 913 914 static methodHandle resolve_interface_call(InstanceKlass* klass, 915 const methodHandle& method, 916 Klass* recv_klass, 917 Handle receiver, 918 TRAPS) { 919 920 assert(!method.is_null() , "method should not be null"); 921 922 CallInfo info; 923 Symbol* signature = method->signature(); 924 Symbol* name = method->name(); 925 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 926 LinkInfo(klass, name, signature), 927 true, 928 CHECK_(methodHandle())); 929 return methodHandle(THREAD, info.selected_method()); 930 } 931 932 // Narrowing of basic types. Used to create correct jvalues for 933 // boolean, byte, char and short return return values from interpreter 934 // which are returned as ints. Throws IllegalArgumentException. 935 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) { 936 switch (narrow_type) { 937 case T_BOOLEAN: 938 value->z = (jboolean) (value->i & 1); 939 return; 940 case T_BYTE: 941 value->b = (jbyte)value->i; 942 return; 943 case T_CHAR: 944 value->c = (jchar)value->i; 945 return; 946 case T_SHORT: 947 value->s = (jshort)value->i; 948 return; 949 default: 950 break; // fail 951 } 952 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 953 } 954 955 956 // Method call (shared by invoke_method and invoke_constructor) 957 static oop invoke(InstanceKlass* klass, 958 const methodHandle& reflected_method, 959 Handle receiver, 960 bool override, 961 objArrayHandle ptypes, 962 BasicType rtype, 963 objArrayHandle args, 964 bool is_method_invoke, 965 TRAPS) { 966 967 ResourceMark rm(THREAD); 968 969 methodHandle method; // actual method to invoke 970 Klass* target_klass; // target klass, receiver's klass for non-static 971 972 // Ensure klass is initialized 973 klass->initialize(CHECK_NULL); 974 975 bool is_static = reflected_method->is_static(); 976 if (is_static) { 977 // ignore receiver argument 978 method = reflected_method; 979 target_klass = klass; 980 } else { 981 // check for null receiver 982 if (receiver.is_null()) { 983 THROW_NULL(vmSymbols::java_lang_NullPointerException()); 984 } 985 // Check class of receiver against class declaring method 986 if (!receiver->is_a(klass)) { 987 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 988 } 989 // target klass is receiver's klass 990 target_klass = receiver->klass(); 991 // no need to resolve if method is private or <init> 992 if (reflected_method->is_private() || 993 reflected_method->name() == vmSymbols::object_initializer_name()) { 994 method = reflected_method; 995 } else { 996 // resolve based on the receiver 997 if (reflected_method->method_holder()->is_interface()) { 998 // resolve interface call 999 // 1000 // Match resolution errors with those thrown due to reflection inlining 1001 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 1002 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 1003 if (HAS_PENDING_EXCEPTION) { 1004 // Method resolution threw an exception; wrap it in an InvocationTargetException 1005 oop resolution_exception = PENDING_EXCEPTION; 1006 CLEAR_PENDING_EXCEPTION; 1007 // JVMTI has already reported the pending exception 1008 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1009 JvmtiExport::clear_detected_exception(THREAD); 1010 JavaCallArguments args(Handle(THREAD, resolution_exception)); 1011 THROW_ARG_NULL(vmSymbols::java_lang_reflect_InvocationTargetException(), 1012 vmSymbols::throwable_void_signature(), 1013 &args); 1014 } 1015 } else { 1016 // if the method can be overridden, we resolve using the vtable index. 1017 assert(!reflected_method->has_itable_index(), ""); 1018 int index = reflected_method->vtable_index(); 1019 method = reflected_method; 1020 if (index != Method::nonvirtual_vtable_index) { 1021 method = methodHandle(THREAD, target_klass->method_at_vtable(index)); 1022 } 1023 if (!method.is_null()) { 1024 // Check for abstract methods as well 1025 if (method->is_abstract()) { 1026 // new default: 6531596 1027 ResourceMark rm(THREAD); 1028 stringStream ss; 1029 ss.print("'"); 1030 Method::print_external_name(&ss, target_klass, method->name(), method->signature()); 1031 ss.print("'"); 1032 Handle h_origexception = Exceptions::new_exception(THREAD, 1033 vmSymbols::java_lang_AbstractMethodError(), ss.as_string()); 1034 JavaCallArguments args(h_origexception); 1035 THROW_ARG_NULL(vmSymbols::java_lang_reflect_InvocationTargetException(), 1036 vmSymbols::throwable_void_signature(), 1037 &args); 1038 } 1039 } 1040 } 1041 } 1042 } 1043 1044 // I believe this is a ShouldNotGetHere case which requires 1045 // an internal vtable bug. If you ever get this please let Karen know. 1046 if (method.is_null()) { 1047 ResourceMark rm(THREAD); 1048 stringStream ss; 1049 ss.print("'"); 1050 Method::print_external_name(&ss, klass, 1051 reflected_method->name(), 1052 reflected_method->signature()); 1053 ss.print("'"); 1054 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string()); 1055 } 1056 1057 assert(ptypes->is_objArray(), "just checking"); 1058 int args_len = args.is_null() ? 0 : args->length(); 1059 // Check number of arguments 1060 if (ptypes->length() != args_len) { 1061 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 1062 "wrong number of arguments"); 1063 } 1064 1065 // Create object to contain parameters for the JavaCall 1066 JavaCallArguments java_args(method->size_of_parameters()); 1067 1068 if (!is_static) { 1069 java_args.push_oop(receiver); 1070 } 1071 1072 for (int i = 0; i < args_len; i++) { 1073 oop type_mirror = ptypes->obj_at(i, CHECK_NULL); 1074 oop arg = args->obj_at(i, CHECK_NULL); 1075 if (java_lang_Class::is_primitive(type_mirror)) { 1076 jvalue value; 1077 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror); 1078 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL); 1079 if (ptype != atype) { 1080 Reflection::widen(&value, atype, ptype, CHECK_NULL); 1081 } 1082 switch (ptype) { 1083 case T_BOOLEAN: java_args.push_int(value.z); break; 1084 case T_CHAR: java_args.push_int(value.c); break; 1085 case T_BYTE: java_args.push_int(value.b); break; 1086 case T_SHORT: java_args.push_int(value.s); break; 1087 case T_INT: java_args.push_int(value.i); break; 1088 case T_LONG: java_args.push_long(value.j); break; 1089 case T_FLOAT: java_args.push_float(value.f); break; 1090 case T_DOUBLE: java_args.push_double(value.d); break; 1091 default: 1092 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1093 } 1094 } else { 1095 if (arg != nullptr) { 1096 Klass* k = java_lang_Class::as_Klass(type_mirror); 1097 if (!arg->is_a(k)) { 1098 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 1099 "argument type mismatch"); 1100 } 1101 } 1102 Handle arg_handle(THREAD, arg); // Create handle for argument 1103 java_args.push_oop(arg_handle); // Push handle 1104 } 1105 } 1106 1107 assert(java_args.size_of_parameters() == method->size_of_parameters(), 1108 "just checking"); 1109 1110 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1111 // oop (i.e., NOT as an handle) 1112 JavaValue result(rtype); 1113 JavaCalls::call(&result, method, &java_args, THREAD); 1114 1115 if (HAS_PENDING_EXCEPTION) { 1116 // Method threw an exception; wrap it in an InvocationTargetException 1117 oop target_exception = PENDING_EXCEPTION; 1118 CLEAR_PENDING_EXCEPTION; 1119 // JVMTI has already reported the pending exception 1120 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1121 JvmtiExport::clear_detected_exception(THREAD); 1122 1123 JavaCallArguments args(Handle(THREAD, target_exception)); 1124 THROW_ARG_NULL(vmSymbols::java_lang_reflect_InvocationTargetException(), 1125 vmSymbols::throwable_void_signature(), 1126 &args); 1127 } else { 1128 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1129 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL); 1130 } 1131 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD); 1132 } 1133 } 1134 1135 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1136 // of java.lang.reflect.Constructor 1137 1138 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1139 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1140 int slot = java_lang_reflect_Method::slot(method_mirror); 1141 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1142 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1143 1144 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1145 BasicType rtype; 1146 if (java_lang_Class::is_primitive(return_type_mirror)) { 1147 rtype = basic_type_mirror_to_basic_type(return_type_mirror); 1148 } else { 1149 rtype = T_OBJECT; 1150 } 1151 1152 InstanceKlass* klass = java_lang_Class::as_InstanceKlass(mirror); 1153 Method* m = klass->method_with_idnum(slot); 1154 if (m == nullptr) { 1155 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "invoke"); 1156 } 1157 methodHandle method(THREAD, m); 1158 1159 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1160 } 1161 1162 1163 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1164 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1165 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1166 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1167 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1168 1169 InstanceKlass* klass = java_lang_Class::as_InstanceKlass(mirror); 1170 Method* m = klass->method_with_idnum(slot); 1171 if (m == nullptr) { 1172 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "invoke"); 1173 } 1174 methodHandle method(THREAD, m); 1175 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1176 1177 // Make sure klass gets initialize 1178 klass->initialize(CHECK_NULL); 1179 1180 // Create new instance (the receiver) 1181 klass->check_valid_for_instantiation(false, CHECK_NULL); 1182 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1183 1184 // Ignore result from call and return receiver 1185 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1186 return receiver(); 1187 } --- EOF ---