1 /* 2 * Copyright (c) 1997, 2020, 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 "jvm.h" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/moduleEntry.hpp" 29 #include "classfile/packageEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/systemDictionary.hpp" 32 #include "classfile/verifier.hpp" 33 #include "classfile/vmSymbols.hpp" 34 #include "interpreter/linkResolver.hpp" 35 #include "logging/log.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/instanceKlass.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/typeArrayOop.inline.hpp" 44 #include "prims/jvmtiExport.hpp" 45 #include "runtime/arguments.hpp" 46 #include "runtime/fieldDescriptor.inline.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/reflection.hpp" 50 #include "runtime/reflectionUtils.hpp" 51 #include "runtime/signature.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.inline.hpp" 54 55 static void trace_class_resolution(oop mirror) { 56 if (mirror == NULL || java_lang_Class::is_primitive(mirror)) { 57 return; 58 } 59 Klass* to_class = java_lang_Class::as_Klass(mirror); 60 ResourceMark rm; 61 int line_number = -1; 62 const char * source_file = NULL; 63 Klass* caller = NULL; 64 JavaThread* jthread = JavaThread::current(); 65 if (jthread->has_last_Java_frame()) { 66 vframeStream vfst(jthread); 67 // skip over any frames belonging to java.lang.Class 68 while (!vfst.at_end() && 69 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 70 vfst.next(); 71 } 72 if (!vfst.at_end()) { 73 // this frame is a likely suspect 74 caller = vfst.method()->method_holder(); 75 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 76 Symbol* s = vfst.method()->method_holder()->source_file_name(); 77 if (s != NULL) { 78 source_file = s->as_C_string(); 79 } 80 } 81 } 82 if (caller != NULL) { 83 const char * from = caller->external_name(); 84 const char * to = to_class->external_name(); 85 // print in a single call to reduce interleaving between threads 86 if (source_file != NULL) { 87 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number); 88 } else { 89 log_debug(class, resolve)("%s %s (reflection)", from, to); 90 } 91 } 92 } 93 94 95 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 96 if (type == T_VOID) { 97 return NULL; 98 } 99 if (is_reference_type(type)) { 100 // regular objects are not boxed 101 return (oop) value->l; 102 } 103 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 104 if (result == NULL) { 105 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 106 } 107 return result; 108 } 109 110 111 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 112 if (box == NULL) { 113 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 114 } 115 return java_lang_boxing_object::get_value(box, value); 116 } 117 118 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 119 // Note: box is really the unboxed oop. It might even be a Short, etc.! 120 value->l = cast_from_oop<jobject>(box); 121 return T_OBJECT; 122 } 123 124 125 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 126 assert(wide_type != current_type, "widen should not be called with identical types"); 127 switch (wide_type) { 128 case T_BOOLEAN: 129 case T_BYTE: 130 case T_CHAR: 131 break; // fail 132 case T_SHORT: 133 switch (current_type) { 134 case T_BYTE: 135 value->s = (jshort) value->b; 136 return; 137 default: 138 break; 139 } 140 break; // fail 141 case T_INT: 142 switch (current_type) { 143 case T_BYTE: 144 value->i = (jint) value->b; 145 return; 146 case T_CHAR: 147 value->i = (jint) value->c; 148 return; 149 case T_SHORT: 150 value->i = (jint) value->s; 151 return; 152 default: 153 break; 154 } 155 break; // fail 156 case T_LONG: 157 switch (current_type) { 158 case T_BYTE: 159 value->j = (jlong) value->b; 160 return; 161 case T_CHAR: 162 value->j = (jlong) value->c; 163 return; 164 case T_SHORT: 165 value->j = (jlong) value->s; 166 return; 167 case T_INT: 168 value->j = (jlong) value->i; 169 return; 170 default: 171 break; 172 } 173 break; // fail 174 case T_FLOAT: 175 switch (current_type) { 176 case T_BYTE: 177 value->f = (jfloat) value->b; 178 return; 179 case T_CHAR: 180 value->f = (jfloat) value->c; 181 return; 182 case T_SHORT: 183 value->f = (jfloat) value->s; 184 return; 185 case T_INT: 186 value->f = (jfloat) value->i; 187 return; 188 case T_LONG: 189 value->f = (jfloat) value->j; 190 return; 191 default: 192 break; 193 } 194 break; // fail 195 case T_DOUBLE: 196 switch (current_type) { 197 case T_BYTE: 198 value->d = (jdouble) value->b; 199 return; 200 case T_CHAR: 201 value->d = (jdouble) value->c; 202 return; 203 case T_SHORT: 204 value->d = (jdouble) value->s; 205 return; 206 case T_INT: 207 value->d = (jdouble) value->i; 208 return; 209 case T_FLOAT: 210 value->d = (jdouble) value->f; 211 return; 212 case T_LONG: 213 value->d = (jdouble) value->j; 214 return; 215 default: 216 break; 217 } 218 break; // fail 219 default: 220 break; // fail 221 } 222 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 223 } 224 225 226 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 227 if (!a->is_within_bounds(index)) { 228 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 229 } 230 if (a->is_objArray()) { 231 value->l = cast_from_oop<jobject>(objArrayOop(a)->obj_at(index)); 232 return T_OBJECT; 233 } else { 234 assert(a->is_typeArray(), "just checking"); 235 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 236 switch (type) { 237 case T_BOOLEAN: 238 value->z = typeArrayOop(a)->bool_at(index); 239 break; 240 case T_CHAR: 241 value->c = typeArrayOop(a)->char_at(index); 242 break; 243 case T_FLOAT: 244 value->f = typeArrayOop(a)->float_at(index); 245 break; 246 case T_DOUBLE: 247 value->d = typeArrayOop(a)->double_at(index); 248 break; 249 case T_BYTE: 250 value->b = typeArrayOop(a)->byte_at(index); 251 break; 252 case T_SHORT: 253 value->s = typeArrayOop(a)->short_at(index); 254 break; 255 case T_INT: 256 value->i = typeArrayOop(a)->int_at(index); 257 break; 258 case T_LONG: 259 value->j = typeArrayOop(a)->long_at(index); 260 break; 261 default: 262 return T_ILLEGAL; 263 } 264 return type; 265 } 266 } 267 268 269 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 270 if (!a->is_within_bounds(index)) { 271 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 272 } 273 if (a->is_objArray()) { 274 if (value_type == T_OBJECT) { 275 oop obj = (oop) value->l; 276 if (obj != NULL) { 277 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 278 if (!obj->is_a(element_klass)) { 279 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 280 } 281 } 282 objArrayOop(a)->obj_at_put(index, obj); 283 } 284 } else { 285 assert(a->is_typeArray(), "just checking"); 286 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 287 if (array_type != value_type) { 288 // The widen operation can potentially throw an exception, but cannot block, 289 // so typeArrayOop a is safe if the call succeeds. 290 widen(value, value_type, array_type, CHECK); 291 } 292 switch (array_type) { 293 case T_BOOLEAN: 294 typeArrayOop(a)->bool_at_put(index, value->z); 295 break; 296 case T_CHAR: 297 typeArrayOop(a)->char_at_put(index, value->c); 298 break; 299 case T_FLOAT: 300 typeArrayOop(a)->float_at_put(index, value->f); 301 break; 302 case T_DOUBLE: 303 typeArrayOop(a)->double_at_put(index, value->d); 304 break; 305 case T_BYTE: 306 typeArrayOop(a)->byte_at_put(index, value->b); 307 break; 308 case T_SHORT: 309 typeArrayOop(a)->short_at_put(index, value->s); 310 break; 311 case T_INT: 312 typeArrayOop(a)->int_at_put(index, value->i); 313 break; 314 case T_LONG: 315 typeArrayOop(a)->long_at_put(index, value->j); 316 break; 317 default: 318 THROW(vmSymbols::java_lang_IllegalArgumentException()); 319 } 320 } 321 } 322 323 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 324 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 325 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 326 if (type == T_VOID) { 327 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 328 } 329 else { 330 return Universe::typeArrayKlassObj(type); 331 } 332 } 333 334 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 335 if (element_mirror == NULL) { 336 THROW_0(vmSymbols::java_lang_NullPointerException()); 337 } 338 if (length < 0) { 339 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length)); 340 } 341 if (java_lang_Class::is_primitive(element_mirror)) { 342 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 343 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 344 } else { 345 Klass* k = java_lang_Class::as_Klass(element_mirror); 346 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 347 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 348 } 349 return oopFactory::new_objArray(k, length, THREAD); 350 } 351 } 352 353 354 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 355 assert(dim_array->is_typeArray(), "just checking"); 356 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 357 358 if (element_mirror == NULL) { 359 THROW_0(vmSymbols::java_lang_NullPointerException()); 360 } 361 362 int len = dim_array->length(); 363 if (len <= 0 || len > MAX_DIM) { 364 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 365 } 366 367 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 368 for (int i = 0; i < len; i++) { 369 int d = dim_array->int_at(i); 370 if (d < 0) { 371 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d)); 372 } 373 dimensions[i] = d; 374 } 375 376 Klass* klass; 377 int dim = len; 378 if (java_lang_Class::is_primitive(element_mirror)) { 379 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 380 } else { 381 klass = java_lang_Class::as_Klass(element_mirror); 382 if (klass->is_array_klass()) { 383 int k_dim = ArrayKlass::cast(klass)->dimension(); 384 if (k_dim + len > MAX_DIM) { 385 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 386 } 387 dim += k_dim; 388 } 389 } 390 klass = klass->array_klass(dim, CHECK_NULL); 391 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 392 assert(obj->is_array(), "just checking"); 393 return arrayOop(obj); 394 } 395 396 397 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) { 398 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 399 for (;;) { 400 const InstanceKlass* hc = ik->unsafe_anonymous_host(); 401 if (hc == NULL) return false; 402 if (hc == unsafe_anonymous_host) return true; 403 ik = hc; 404 405 // There's no way to make a host class loop short of patching memory. 406 // Therefore there cannot be a loop here unless there's another bug. 407 // Still, let's check for it. 408 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop"); 409 } 410 } 411 412 static bool can_relax_access_check_for(const Klass* accessor, 413 const Klass* accessee, 414 bool classloader_only) { 415 416 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 417 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 418 419 // If either is on the other's unsafe_anonymous_host chain, access is OK, 420 // because one is inside the other. 421 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) || 422 under_unsafe_anonymous_host(accessee_ik, accessor_ik)) 423 return true; 424 425 if (RelaxAccessControlCheck && 426 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 427 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) { 428 return classloader_only && 429 Verifier::relax_access_for(accessor_ik->class_loader()) && 430 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 431 accessor_ik->class_loader() == accessee_ik->class_loader(); 432 } 433 434 return false; 435 } 436 437 /* 438 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if: 439 440 Callee T in Callee T in package PT, 441 unnamed module runtime module MT 442 ------------------------------------------------------------------------------------------------ 443 444 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES 445 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES 446 unnamed module: YES 447 Else if (MS can read MT (establish readability) && 448 ((MT exports PT to MS or to all modules) || 449 (MT is open))): YES 450 451 ------------------------------------------------------------------------------------------------ 452 Caller S in unnamed YES Readability exists because unnamed module 453 module UM "reads" all modules 454 if (MT exports PT to UM or to all modules): YES 455 456 ------------------------------------------------------------------------------------------------ 457 458 Note: a loose module is a module that can read all current and future unnamed modules. 459 */ 460 Reflection::VerifyClassAccessResults Reflection::verify_class_access( 461 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) { 462 463 // Verify that current_class can access new_class. If the classloader_only 464 // flag is set, we automatically allow any accesses in which current_class 465 // doesn't have a classloader. 466 if ((current_class == NULL) || 467 (current_class == new_class) || 468 is_same_class_package(current_class, new_class)) { 469 return ACCESS_OK; 470 } 471 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 472 // succeed trivially. 473 if (SystemDictionary::reflect_MagicAccessorImpl_klass_is_loaded() && 474 current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 475 return ACCESS_OK; 476 } 477 478 // module boundaries 479 if (new_class->is_public()) { 480 // Ignore modules for DumpSharedSpaces because we do not have any package 481 // or module information for modules other than java.base. 482 if (DumpSharedSpaces) { 483 return ACCESS_OK; 484 } 485 486 // Find the module entry for current_class, the accessor 487 ModuleEntry* module_from = current_class->module(); 488 // Find the module entry for new_class, the accessee 489 ModuleEntry* module_to = new_class->module(); 490 491 // both in same (possibly unnamed) module 492 if (module_from == module_to) { 493 return ACCESS_OK; 494 } 495 496 // Acceptable access to a type in an unnamed module. Note that since 497 // unnamed modules can read all unnamed modules, this also handles the 498 // case where module_from is also unnamed but in a different class loader. 499 if (!module_to->is_named() && 500 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) { 501 return ACCESS_OK; 502 } 503 504 // Establish readability, check if module_from is allowed to read module_to. 505 if (!module_from->can_read(module_to)) { 506 return MODULE_NOT_READABLE; 507 } 508 509 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported 510 if (module_to->is_open()) { 511 return ACCESS_OK; 512 } 513 514 PackageEntry* package_to = new_class->package(); 515 assert(package_to != NULL, "can not obtain new_class' package"); 516 517 { 518 MutexLocker m1(Module_lock); 519 520 // Once readability is established, if module_to exports T unqualifiedly, 521 // (to all modules), than whether module_from is in the unnamed module 522 // or not does not matter, access is allowed. 523 if (package_to->is_unqual_exported()) { 524 return ACCESS_OK; 525 } 526 527 // Access is allowed if both 1 & 2 hold: 528 // 1. Readability, module_from can read module_to (established above). 529 // 2. Either module_to exports T to module_from qualifiedly. 530 // or 531 // module_to exports T to all unnamed modules and module_from is unnamed. 532 // or 533 // module_to exports T unqualifiedly to all modules (checked above). 534 if (!package_to->is_qexported_to(module_from)) { 535 return TYPE_NOT_EXPORTED; 536 } 537 } 538 return ACCESS_OK; 539 } 540 541 if (can_relax_access_check_for(current_class, new_class, classloader_only)) { 542 return ACCESS_OK; 543 } 544 return OTHER_PROBLEM; 545 } 546 547 // Return an error message specific to the specified Klass*'s and result. 548 // This function must be called from within a block containing a ResourceMark. 549 char* Reflection::verify_class_access_msg(const Klass* current_class, 550 const InstanceKlass* new_class, 551 const VerifyClassAccessResults result) { 552 assert(result != ACCESS_OK, "must be failure result"); 553 char * msg = NULL; 554 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) { 555 // Find the module entry for current_class, the accessor 556 ModuleEntry* module_from = current_class->module(); 557 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE; 558 const char * current_class_name = current_class->external_name(); 559 560 // Find the module entry for new_class, the accessee 561 ModuleEntry* module_to = NULL; 562 module_to = new_class->module(); 563 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE; 564 const char * new_class_name = new_class->external_name(); 565 566 if (result == MODULE_NOT_READABLE) { 567 assert(module_from->is_named(), "Unnamed modules can read all modules"); 568 if (module_to->is_named()) { 569 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) + 570 strlen(new_class_name) + 2*strlen(module_to_name); 571 msg = NEW_RESOURCE_ARRAY(char, len); 572 jio_snprintf(msg, len - 1, 573 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s", 574 current_class_name, module_from_name, new_class_name, 575 module_to_name, module_from_name, module_to_name); 576 } else { 577 oop jlm = module_to->module(); 578 assert(jlm != NULL, "Null jlm in module_to ModuleEntry"); 579 intptr_t identity_hash = jlm->identity_hash(); 580 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) + 581 strlen(new_class_name) + 2*sizeof(uintx); 582 msg = NEW_RESOURCE_ARRAY(char, len); 583 jio_snprintf(msg, len - 1, 584 "class %s (in module %s) cannot access class %s (in unnamed module @" SIZE_FORMAT_HEX ") because module %s does not read unnamed module @" SIZE_FORMAT_HEX, 585 current_class_name, module_from_name, new_class_name, uintx(identity_hash), 586 module_from_name, uintx(identity_hash)); 587 } 588 589 } else if (result == TYPE_NOT_EXPORTED) { 590 assert(new_class->package() != NULL, 591 "Unnamed packages are always exported"); 592 const char * package_name = 593 new_class->package()->name()->as_klass_external_name(); 594 assert(module_to->is_named(), "Unnamed modules export all packages"); 595 if (module_from->is_named()) { 596 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) + 597 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name); 598 msg = NEW_RESOURCE_ARRAY(char, len); 599 jio_snprintf(msg, len - 1, 600 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s", 601 current_class_name, module_from_name, new_class_name, 602 module_to_name, module_to_name, package_name, module_from_name); 603 } else { 604 oop jlm = module_from->module(); 605 assert(jlm != NULL, "Null jlm in module_from ModuleEntry"); 606 intptr_t identity_hash = jlm->identity_hash(); 607 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) + 608 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx); 609 msg = NEW_RESOURCE_ARRAY(char, len); 610 jio_snprintf(msg, len - 1, 611 "class %s (in unnamed module @" SIZE_FORMAT_HEX ") cannot access class %s (in module %s) because module %s does not export %s to unnamed module @" SIZE_FORMAT_HEX, 612 current_class_name, uintx(identity_hash), new_class_name, module_to_name, 613 module_to_name, package_name, uintx(identity_hash)); 614 } 615 } else { 616 ShouldNotReachHere(); 617 } 618 } // result != OTHER_PROBLEM... 619 return msg; 620 } 621 622 bool Reflection::verify_member_access(const Klass* current_class, 623 const Klass* resolved_class, 624 const Klass* member_class, 625 AccessFlags access, 626 bool classloader_only, 627 bool protected_restriction, 628 TRAPS) { 629 // Verify that current_class can access a member of member_class, where that 630 // field's access bits are "access". We assume that we've already verified 631 // that current_class can access member_class. 632 // 633 // If the classloader_only flag is set, we automatically allow any accesses 634 // in which current_class doesn't have a classloader. 635 // 636 // "resolved_class" is the runtime type of "member_class". Sometimes we don't 637 // need this distinction (e.g. if all we have is the runtime type, or during 638 // class file parsing when we only care about the static type); in that case 639 // callers should ensure that resolved_class == member_class. 640 // 641 if ((current_class == NULL) || 642 (current_class == member_class) || 643 access.is_public()) { 644 return true; 645 } 646 647 const Klass* host_class = current_class; 648 if (current_class->is_instance_klass() && 649 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) { 650 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host(); 651 assert(host_class != NULL, "Unsafe anonymous class has null host class"); 652 assert(!(host_class->is_instance_klass() && 653 InstanceKlass::cast(host_class)->is_unsafe_anonymous()), 654 "unsafe_anonymous_host should not be unsafe anonymous itself"); 655 } 656 if (host_class == member_class) { 657 return true; 658 } 659 660 if (access.is_protected()) { 661 if (!protected_restriction) { 662 // See if current_class (or outermost host class) is a subclass of member_class 663 // An interface may not access protected members of j.l.Object 664 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) { 665 if (access.is_static() || // static fields are ok, see 6622385 666 current_class == resolved_class || 667 member_class == resolved_class || 668 host_class->is_subclass_of(resolved_class) || 669 resolved_class->is_subclass_of(host_class)) { 670 return true; 671 } 672 } 673 } 674 } 675 676 // package access 677 if (!access.is_private() && is_same_class_package(current_class, member_class)) { 678 return true; 679 } 680 681 // private access between different classes needs a nestmate check, but 682 // not for unsafe anonymous classes - so check host_class 683 if (access.is_private() && host_class == current_class) { 684 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) { 685 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class)); 686 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class)); 687 // Nestmate access checks may require resolution and validation of the nest-host. 688 // It is up to the caller to check for pending exceptions and handle appropriately. 689 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false); 690 if (access) { 691 guarantee(resolved_class->is_subclass_of(member_class), "must be!"); 692 return true; 693 } 694 } 695 } 696 697 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 698 // succeed trivially. 699 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 700 return true; 701 } 702 703 // Check for special relaxations 704 return can_relax_access_check_for(current_class, member_class, classloader_only); 705 } 706 707 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) { 708 return InstanceKlass::cast(class1)->is_same_class_package(class2); 709 } 710 711 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 712 // throw an incompatible class change exception 713 // If inner_is_member, require the inner to be a member of the outer. 714 // If !inner_is_member, require the inner to be hidden or unsafe anonymous (non-members). 715 // Caller is responsible for figuring out in advance which case must be true. 716 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner, 717 bool inner_is_member, TRAPS) { 718 InnerClassesIterator iter(outer); 719 constantPoolHandle cp (THREAD, outer->constants()); 720 for (; !iter.done(); iter.next()) { 721 int ioff = iter.inner_class_info_index(); 722 int ooff = iter.outer_class_info_index(); 723 724 if (inner_is_member && ioff != 0 && ooff != 0) { 725 if (cp->klass_name_at_matches(outer, ooff) && 726 cp->klass_name_at_matches(inner, ioff)) { 727 Klass* o = cp->klass_at(ooff, CHECK); 728 if (o == outer) { 729 Klass* i = cp->klass_at(ioff, CHECK); 730 if (i == inner) { 731 return; 732 } 733 } 734 } 735 } 736 737 if (!inner_is_member && ioff != 0 && ooff == 0 && 738 cp->klass_name_at_matches(inner, ioff)) { 739 Klass* i = cp->klass_at(ioff, CHECK); 740 if (i == inner) { 741 return; 742 } 743 } 744 } 745 746 // 'inner' not declared as an inner klass in outer 747 ResourceMark rm(THREAD); 748 Exceptions::fthrow( 749 THREAD_AND_LOCATION, 750 vmSymbols::java_lang_IncompatibleClassChangeError(), 751 "%s and %s disagree on InnerClasses attribute", 752 outer->external_name(), 753 inner->external_name() 754 ); 755 } 756 757 static objArrayHandle get_parameter_types(const methodHandle& method, 758 int parameter_count, 759 oop* return_type, 760 TRAPS) { 761 // Allocate array holding parameter types (java.lang.Class instances) 762 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 763 objArrayHandle mirrors(THREAD, m); 764 int index = 0; 765 // Collect parameter types 766 ResourceMark rm(THREAD); 767 for (ResolvingSignatureStream ss(method()); !ss.is_done(); ss.next()) { 768 oop mirror = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_(objArrayHandle())); 769 if (log_is_enabled(Debug, class, resolve)) { 770 trace_class_resolution(mirror); 771 } 772 if (!ss.at_return_type()) { 773 mirrors->obj_at_put(index++, mirror); 774 } else if (return_type != NULL) { 775 // Collect return type as well 776 assert(ss.at_return_type(), "return type should be present"); 777 *return_type = mirror; 778 } 779 } 780 assert(index == parameter_count, "invalid parameter count"); 781 return mirrors; 782 } 783 784 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) { 785 return method->resolved_checked_exceptions(THREAD); 786 } 787 788 static Handle new_type(Symbol* signature, Klass* k, TRAPS) { 789 ResolvingSignatureStream ss(signature, k, false); 790 oop nt = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_NH); 791 if (log_is_enabled(Debug, class, resolve)) { 792 trace_class_resolution(nt); 793 } 794 return Handle(THREAD, nt); 795 } 796 797 798 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) { 799 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 800 assert(!method()->is_initializer() || 801 (for_constant_pool_access && method()->is_static()), 802 "should call new_constructor instead"); 803 InstanceKlass* holder = method->method_holder(); 804 int slot = method->method_idnum(); 805 806 Symbol* signature = method->signature(); 807 int parameter_count = ArgumentCount(signature).size(); 808 oop return_type_oop = NULL; 809 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 810 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 811 812 Handle return_type(THREAD, return_type_oop); 813 814 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 815 816 if (exception_types.is_null()) return NULL; 817 818 Symbol* method_name = method->name(); 819 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 820 Handle name = Handle(THREAD, name_oop); 821 if (name == NULL) return NULL; 822 823 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 824 825 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 826 827 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 828 java_lang_reflect_Method::set_slot(mh(), slot); 829 java_lang_reflect_Method::set_name(mh(), name()); 830 java_lang_reflect_Method::set_return_type(mh(), return_type()); 831 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 832 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 833 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 834 java_lang_reflect_Method::set_override(mh(), false); 835 if (method->generic_signature() != NULL) { 836 Symbol* gs = method->generic_signature(); 837 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 838 java_lang_reflect_Method::set_signature(mh(), sig()); 839 } 840 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 841 java_lang_reflect_Method::set_annotations(mh(), an_oop); 842 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 843 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 844 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 845 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 846 return mh(); 847 } 848 849 850 oop Reflection::new_constructor(const methodHandle& method, TRAPS) { 851 assert(method()->is_initializer(), "should call new_method instead"); 852 853 InstanceKlass* holder = method->method_holder(); 854 int slot = method->method_idnum(); 855 856 Symbol* signature = method->signature(); 857 int parameter_count = ArgumentCount(signature).size(); 858 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 859 if (parameter_types.is_null()) return NULL; 860 861 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 862 if (exception_types.is_null()) return NULL; 863 864 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 865 866 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 867 868 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 869 java_lang_reflect_Constructor::set_slot(ch(), slot); 870 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 871 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 872 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 873 java_lang_reflect_Constructor::set_override(ch(), false); 874 if (method->generic_signature() != NULL) { 875 Symbol* gs = method->generic_signature(); 876 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 877 java_lang_reflect_Constructor::set_signature(ch(), sig()); 878 } 879 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 880 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 881 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 882 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 883 return ch(); 884 } 885 886 887 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 888 Symbol* field_name = fd->name(); 889 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 890 Handle name = Handle(THREAD, name_oop); 891 Symbol* signature = fd->signature(); 892 InstanceKlass* holder = fd->field_holder(); 893 Handle type = new_type(signature, holder, CHECK_NULL); 894 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 895 896 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 897 java_lang_reflect_Field::set_slot(rh(), fd->index()); 898 java_lang_reflect_Field::set_name(rh(), name()); 899 java_lang_reflect_Field::set_type(rh(), type()); 900 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 901 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 902 java_lang_reflect_Field::set_override(rh(), false); 903 if (fd->has_generic_signature()) { 904 Symbol* gs = fd->generic_signature(); 905 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 906 java_lang_reflect_Field::set_signature(rh(), sig()); 907 } 908 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 909 java_lang_reflect_Field::set_annotations(rh(), an_oop); 910 return rh(); 911 } 912 913 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 914 int flags, TRAPS) { 915 916 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 917 918 if(NULL != sym) { 919 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 920 java_lang_reflect_Parameter::set_name(rh(), name()); 921 } else { 922 java_lang_reflect_Parameter::set_name(rh(), NULL); 923 } 924 925 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 926 java_lang_reflect_Parameter::set_executable(rh(), method()); 927 java_lang_reflect_Parameter::set_index(rh(), index); 928 return rh(); 929 } 930 931 932 static methodHandle resolve_interface_call(InstanceKlass* klass, 933 const methodHandle& method, 934 Klass* recv_klass, 935 Handle receiver, 936 TRAPS) { 937 938 assert(!method.is_null() , "method should not be null"); 939 940 CallInfo info; 941 Symbol* signature = method->signature(); 942 Symbol* name = method->name(); 943 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 944 LinkInfo(klass, name, signature), 945 true, 946 CHECK_(methodHandle())); 947 return methodHandle(THREAD, info.selected_method()); 948 } 949 950 // Conversion 951 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 952 assert(java_lang_Class::is_primitive(basic_type_mirror), 953 "just checking"); 954 return java_lang_Class::primitive_type(basic_type_mirror); 955 } 956 957 // Narrowing of basic types. Used to create correct jvalues for 958 // boolean, byte, char and short return return values from interpreter 959 // which are returned as ints. Throws IllegalArgumentException. 960 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) { 961 switch (narrow_type) { 962 case T_BOOLEAN: 963 value->z = (jboolean) (value->i & 1); 964 return; 965 case T_BYTE: 966 value->b = (jbyte)value->i; 967 return; 968 case T_CHAR: 969 value->c = (jchar)value->i; 970 return; 971 case T_SHORT: 972 value->s = (jshort)value->i; 973 return; 974 default: 975 break; // fail 976 } 977 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 978 } 979 980 981 // Method call (shared by invoke_method and invoke_constructor) 982 static oop invoke(InstanceKlass* klass, 983 const methodHandle& reflected_method, 984 Handle receiver, 985 bool override, 986 objArrayHandle ptypes, 987 BasicType rtype, 988 objArrayHandle args, 989 bool is_method_invoke, 990 TRAPS) { 991 992 ResourceMark rm(THREAD); 993 994 methodHandle method; // actual method to invoke 995 Klass* target_klass; // target klass, receiver's klass for non-static 996 997 // Ensure klass is initialized 998 klass->initialize(CHECK_NULL); 999 1000 bool is_static = reflected_method->is_static(); 1001 if (is_static) { 1002 // ignore receiver argument 1003 method = reflected_method; 1004 target_klass = klass; 1005 } else { 1006 // check for null receiver 1007 if (receiver.is_null()) { 1008 THROW_0(vmSymbols::java_lang_NullPointerException()); 1009 } 1010 // Check class of receiver against class declaring method 1011 if (!receiver->is_a(klass)) { 1012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 1013 } 1014 // target klass is receiver's klass 1015 target_klass = receiver->klass(); 1016 // no need to resolve if method is private or <init> 1017 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 1018 method = reflected_method; 1019 } else { 1020 // resolve based on the receiver 1021 if (reflected_method->method_holder()->is_interface()) { 1022 // resolve interface call 1023 // 1024 // Match resolution errors with those thrown due to reflection inlining 1025 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 1026 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 1027 if (HAS_PENDING_EXCEPTION) { 1028 // Method resolution threw an exception; wrap it in an InvocationTargetException 1029 oop resolution_exception = PENDING_EXCEPTION; 1030 CLEAR_PENDING_EXCEPTION; 1031 // JVMTI has already reported the pending exception 1032 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1033 if (THREAD->is_Java_thread()) { 1034 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1035 } 1036 JavaCallArguments args(Handle(THREAD, resolution_exception)); 1037 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1038 vmSymbols::throwable_void_signature(), 1039 &args); 1040 } 1041 } else { 1042 // if the method can be overridden, we resolve using the vtable index. 1043 assert(!reflected_method->has_itable_index(), ""); 1044 int index = reflected_method->vtable_index(); 1045 method = reflected_method; 1046 if (index != Method::nonvirtual_vtable_index) { 1047 method = methodHandle(THREAD, target_klass->method_at_vtable(index)); 1048 } 1049 if (!method.is_null()) { 1050 // Check for abstract methods as well 1051 if (method->is_abstract()) { 1052 // new default: 6531596 1053 ResourceMark rm(THREAD); 1054 stringStream ss; 1055 ss.print("'"); 1056 Method::print_external_name(&ss, target_klass, method->name(), method->signature()); 1057 ss.print("'"); 1058 Handle h_origexception = Exceptions::new_exception(THREAD, 1059 vmSymbols::java_lang_AbstractMethodError(), ss.as_string()); 1060 JavaCallArguments args(h_origexception); 1061 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1062 vmSymbols::throwable_void_signature(), 1063 &args); 1064 } 1065 } 1066 } 1067 } 1068 } 1069 1070 // I believe this is a ShouldNotGetHere case which requires 1071 // an internal vtable bug. If you ever get this please let Karen know. 1072 if (method.is_null()) { 1073 ResourceMark rm(THREAD); 1074 stringStream ss; 1075 ss.print("'"); 1076 Method::print_external_name(&ss, klass, 1077 reflected_method->name(), 1078 reflected_method->signature()); 1079 ss.print("'"); 1080 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string()); 1081 } 1082 1083 assert(ptypes->is_objArray(), "just checking"); 1084 int args_len = args.is_null() ? 0 : args->length(); 1085 // Check number of arguments 1086 if (ptypes->length() != args_len) { 1087 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1088 "wrong number of arguments"); 1089 } 1090 1091 // Create object to contain parameters for the JavaCall 1092 JavaCallArguments java_args(method->size_of_parameters()); 1093 1094 if (!is_static) { 1095 java_args.push_oop(receiver); 1096 } 1097 1098 for (int i = 0; i < args_len; i++) { 1099 oop type_mirror = ptypes->obj_at(i); 1100 oop arg = args->obj_at(i); 1101 if (java_lang_Class::is_primitive(type_mirror)) { 1102 jvalue value; 1103 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1104 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL); 1105 if (ptype != atype) { 1106 Reflection::widen(&value, atype, ptype, CHECK_NULL); 1107 } 1108 switch (ptype) { 1109 case T_BOOLEAN: java_args.push_int(value.z); break; 1110 case T_CHAR: java_args.push_int(value.c); break; 1111 case T_BYTE: java_args.push_int(value.b); break; 1112 case T_SHORT: java_args.push_int(value.s); break; 1113 case T_INT: java_args.push_int(value.i); break; 1114 case T_LONG: java_args.push_long(value.j); break; 1115 case T_FLOAT: java_args.push_float(value.f); break; 1116 case T_DOUBLE: java_args.push_double(value.d); break; 1117 default: 1118 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1119 } 1120 } else { 1121 if (arg != NULL) { 1122 Klass* k = java_lang_Class::as_Klass(type_mirror); 1123 if (!arg->is_a(k)) { 1124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1125 "argument type mismatch"); 1126 } 1127 } 1128 Handle arg_handle(THREAD, arg); // Create handle for argument 1129 java_args.push_oop(arg_handle); // Push handle 1130 } 1131 } 1132 1133 assert(java_args.size_of_parameters() == method->size_of_parameters(), 1134 "just checking"); 1135 1136 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1137 // oop (i.e., NOT as an handle) 1138 JavaValue result(rtype); 1139 JavaCalls::call(&result, method, &java_args, THREAD); 1140 1141 if (HAS_PENDING_EXCEPTION) { 1142 // Method threw an exception; wrap it in an InvocationTargetException 1143 oop target_exception = PENDING_EXCEPTION; 1144 CLEAR_PENDING_EXCEPTION; 1145 // JVMTI has already reported the pending exception 1146 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1147 if (THREAD->is_Java_thread()) { 1148 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1149 } 1150 1151 JavaCallArguments args(Handle(THREAD, target_exception)); 1152 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1153 vmSymbols::throwable_void_signature(), 1154 &args); 1155 } else { 1156 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1157 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL); 1158 } 1159 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD); 1160 } 1161 } 1162 1163 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1164 // of java.lang.reflect.Constructor 1165 1166 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1167 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1168 int slot = java_lang_reflect_Method::slot(method_mirror); 1169 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1170 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1171 1172 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1173 BasicType rtype; 1174 if (java_lang_Class::is_primitive(return_type_mirror)) { 1175 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1176 } else { 1177 rtype = T_OBJECT; 1178 } 1179 1180 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1181 Method* m = klass->method_with_idnum(slot); 1182 if (m == NULL) { 1183 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1184 } 1185 methodHandle method(THREAD, m); 1186 1187 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1188 } 1189 1190 1191 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1192 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1193 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1194 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1195 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1196 1197 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1198 Method* m = klass->method_with_idnum(slot); 1199 if (m == NULL) { 1200 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1201 } 1202 methodHandle method(THREAD, m); 1203 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1204 1205 // Make sure klass gets initialize 1206 klass->initialize(CHECK_NULL); 1207 1208 // Create new instance (the receiver) 1209 klass->check_valid_for_instantiation(false, CHECK_NULL); 1210 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1211 1212 // Ignore result from call and return receiver 1213 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1214 return receiver(); 1215 }