1 /* 2 * Copyright (c) 1997, 2018, 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.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/handles.inline.hpp" 47 #include "runtime/javaCalls.hpp" 48 #include "runtime/reflection.hpp" 49 #include "runtime/reflectionUtils.hpp" 50 #include "runtime/signature.hpp" 51 #include "runtime/vframe.inline.hpp" 52 53 static void trace_class_resolution(const Klass* to_class) { 54 ResourceMark rm; 55 int line_number = -1; 56 const char * source_file = NULL; 57 Klass* caller = NULL; 58 JavaThread* jthread = JavaThread::current(); 59 if (jthread->has_last_Java_frame()) { 60 vframeStream vfst(jthread); 61 // skip over any frames belonging to java.lang.Class 62 while (!vfst.at_end() && 63 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 64 vfst.next(); 65 } 66 if (!vfst.at_end()) { 67 // this frame is a likely suspect 68 caller = vfst.method()->method_holder(); 69 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 70 Symbol* s = vfst.method()->method_holder()->source_file_name(); 71 if (s != NULL) { 72 source_file = s->as_C_string(); 73 } 74 } 75 } 76 if (caller != NULL) { 77 const char * from = caller->external_name(); 78 const char * to = to_class->external_name(); 79 // print in a single call to reduce interleaving between threads 80 if (source_file != NULL) { 81 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number); 82 } else { 83 log_debug(class, resolve)("%s %s (reflection)", from, to); 84 } 85 } 86 } 87 88 89 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 90 if (type == T_VOID) { 91 return NULL; 92 } 93 if (type == T_OBJECT || type == T_ARRAY) { 94 // regular objects are not boxed 95 return (oop) value->l; 96 } 97 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 98 if (result == NULL) { 99 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 100 } 101 return result; 102 } 103 104 105 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 106 if (box == NULL) { 107 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 108 } 109 return java_lang_boxing_object::get_value(box, value); 110 } 111 112 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 113 // Note: box is really the unboxed oop. It might even be a Short, etc.! 114 value->l = (jobject) box; 115 return T_OBJECT; 116 } 117 118 119 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 120 assert(wide_type != current_type, "widen should not be called with identical types"); 121 switch (wide_type) { 122 case T_BOOLEAN: 123 case T_BYTE: 124 case T_CHAR: 125 break; // fail 126 case T_SHORT: 127 switch (current_type) { 128 case T_BYTE: 129 value->s = (jshort) value->b; 130 return; 131 default: 132 break; 133 } 134 break; // fail 135 case T_INT: 136 switch (current_type) { 137 case T_BYTE: 138 value->i = (jint) value->b; 139 return; 140 case T_CHAR: 141 value->i = (jint) value->c; 142 return; 143 case T_SHORT: 144 value->i = (jint) value->s; 145 return; 146 default: 147 break; 148 } 149 break; // fail 150 case T_LONG: 151 switch (current_type) { 152 case T_BYTE: 153 value->j = (jlong) value->b; 154 return; 155 case T_CHAR: 156 value->j = (jlong) value->c; 157 return; 158 case T_SHORT: 159 value->j = (jlong) value->s; 160 return; 161 case T_INT: 162 value->j = (jlong) value->i; 163 return; 164 default: 165 break; 166 } 167 break; // fail 168 case T_FLOAT: 169 switch (current_type) { 170 case T_BYTE: 171 value->f = (jfloat) value->b; 172 return; 173 case T_CHAR: 174 value->f = (jfloat) value->c; 175 return; 176 case T_SHORT: 177 value->f = (jfloat) value->s; 178 return; 179 case T_INT: 180 value->f = (jfloat) value->i; 181 return; 182 case T_LONG: 183 value->f = (jfloat) value->j; 184 return; 185 default: 186 break; 187 } 188 break; // fail 189 case T_DOUBLE: 190 switch (current_type) { 191 case T_BYTE: 192 value->d = (jdouble) value->b; 193 return; 194 case T_CHAR: 195 value->d = (jdouble) value->c; 196 return; 197 case T_SHORT: 198 value->d = (jdouble) value->s; 199 return; 200 case T_INT: 201 value->d = (jdouble) value->i; 202 return; 203 case T_FLOAT: 204 value->d = (jdouble) value->f; 205 return; 206 case T_LONG: 207 value->d = (jdouble) value->j; 208 return; 209 default: 210 break; 211 } 212 break; // fail 213 default: 214 break; // fail 215 } 216 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 217 } 218 219 220 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 221 if (!a->is_within_bounds(index)) { 222 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 223 } 224 if (a->is_objArray()) { 225 value->l = (jobject) objArrayOop(a)->obj_at(index); 226 return T_OBJECT; 227 } else { 228 assert(a->is_typeArray(), "just checking"); 229 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 230 switch (type) { 231 case T_BOOLEAN: 232 value->z = typeArrayOop(a)->bool_at(index); 233 break; 234 case T_CHAR: 235 value->c = typeArrayOop(a)->char_at(index); 236 break; 237 case T_FLOAT: 238 value->f = typeArrayOop(a)->float_at(index); 239 break; 240 case T_DOUBLE: 241 value->d = typeArrayOop(a)->double_at(index); 242 break; 243 case T_BYTE: 244 value->b = typeArrayOop(a)->byte_at(index); 245 break; 246 case T_SHORT: 247 value->s = typeArrayOop(a)->short_at(index); 248 break; 249 case T_INT: 250 value->i = typeArrayOop(a)->int_at(index); 251 break; 252 case T_LONG: 253 value->j = typeArrayOop(a)->long_at(index); 254 break; 255 default: 256 return T_ILLEGAL; 257 } 258 return type; 259 } 260 } 261 262 263 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 264 if (!a->is_within_bounds(index)) { 265 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 266 } 267 if (a->is_objArray()) { 268 if (value_type == T_OBJECT) { 269 oop obj = (oop) value->l; 270 if (obj != NULL) { 271 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 272 if (!obj->is_a(element_klass)) { 273 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 274 } 275 } 276 objArrayOop(a)->obj_at_put(index, obj); 277 } 278 } else { 279 assert(a->is_typeArray(), "just checking"); 280 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 281 if (array_type != value_type) { 282 // The widen operation can potentially throw an exception, but cannot block, 283 // so typeArrayOop a is safe if the call succeeds. 284 widen(value, value_type, array_type, CHECK); 285 } 286 switch (array_type) { 287 case T_BOOLEAN: 288 typeArrayOop(a)->bool_at_put(index, value->z); 289 break; 290 case T_CHAR: 291 typeArrayOop(a)->char_at_put(index, value->c); 292 break; 293 case T_FLOAT: 294 typeArrayOop(a)->float_at_put(index, value->f); 295 break; 296 case T_DOUBLE: 297 typeArrayOop(a)->double_at_put(index, value->d); 298 break; 299 case T_BYTE: 300 typeArrayOop(a)->byte_at_put(index, value->b); 301 break; 302 case T_SHORT: 303 typeArrayOop(a)->short_at_put(index, value->s); 304 break; 305 case T_INT: 306 typeArrayOop(a)->int_at_put(index, value->i); 307 break; 308 case T_LONG: 309 typeArrayOop(a)->long_at_put(index, value->j); 310 break; 311 default: 312 THROW(vmSymbols::java_lang_IllegalArgumentException()); 313 } 314 } 315 } 316 317 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 318 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 319 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 320 if (type == T_VOID) { 321 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 322 } 323 else { 324 return Universe::typeArrayKlassObj(type); 325 } 326 } 327 328 #ifdef ASSERT 329 static oop basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 330 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 331 return Universe::java_mirror(type); 332 } 333 #endif 334 335 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 336 if (element_mirror == NULL) { 337 THROW_0(vmSymbols::java_lang_NullPointerException()); 338 } 339 if (length < 0) { 340 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 341 } 342 if (java_lang_Class::is_primitive(element_mirror)) { 343 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 344 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 345 } else { 346 Klass* k = java_lang_Class::as_Klass(element_mirror); 347 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 348 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 349 } 350 return oopFactory::new_objArray(k, length, THREAD); 351 } 352 } 353 354 355 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 356 assert(dim_array->is_typeArray(), "just checking"); 357 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 358 359 if (element_mirror == NULL) { 360 THROW_0(vmSymbols::java_lang_NullPointerException()); 361 } 362 363 int len = dim_array->length(); 364 if (len <= 0 || len > MAX_DIM) { 365 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 366 } 367 368 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 369 for (int i = 0; i < len; i++) { 370 int d = dim_array->int_at(i); 371 if (d < 0) { 372 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 373 } 374 dimensions[i] = d; 375 } 376 377 Klass* klass; 378 int dim = len; 379 if (java_lang_Class::is_primitive(element_mirror)) { 380 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 381 } else { 382 klass = java_lang_Class::as_Klass(element_mirror); 383 if (klass->is_array_klass()) { 384 int k_dim = ArrayKlass::cast(klass)->dimension(); 385 if (k_dim + len > MAX_DIM) { 386 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 387 } 388 dim += k_dim; 389 } 390 } 391 klass = klass->array_klass(dim, CHECK_NULL); 392 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 393 assert(obj->is_array(), "just checking"); 394 return arrayOop(obj); 395 } 396 397 398 oop Reflection::array_component_type(oop mirror, TRAPS) { 399 if (java_lang_Class::is_primitive(mirror)) { 400 return NULL; 401 } 402 403 Klass* klass = java_lang_Class::as_Klass(mirror); 404 if (!klass->is_array_klass()) { 405 return NULL; 406 } 407 408 oop result = java_lang_Class::component_mirror(mirror); 409 #ifdef ASSERT 410 oop result2 = NULL; 411 if (ArrayKlass::cast(klass)->dimension() == 1) { 412 if (klass->is_typeArray_klass()) { 413 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 414 } else { 415 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 416 } 417 } else { 418 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 419 assert(lower_dim->is_array_klass(), "just checking"); 420 result2 = lower_dim->java_mirror(); 421 } 422 assert(oopDesc::equals(result, result2), "results must be consistent"); 423 #endif //ASSERT 424 return result; 425 } 426 427 static bool under_host_klass(const InstanceKlass* ik, const InstanceKlass* host_klass) { 428 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 429 for (;;) { 430 const InstanceKlass* hc = ik->host_klass(); 431 if (hc == NULL) return false; 432 if (hc == host_klass) return true; 433 ik = hc; 434 435 // There's no way to make a host class loop short of patching memory. 436 // Therefore there cannot be a loop here unless there's another bug. 437 // Still, let's check for it. 438 assert(--inf_loop_check > 0, "no host_klass loop"); 439 } 440 } 441 442 static bool can_relax_access_check_for(const Klass* accessor, 443 const Klass* accessee, 444 bool classloader_only) { 445 446 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 447 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 448 449 // If either is on the other's host_klass chain, access is OK, 450 // because one is inside the other. 451 if (under_host_klass(accessor_ik, accessee_ik) || 452 under_host_klass(accessee_ik, accessor_ik)) 453 return true; 454 455 if ((RelaxAccessControlCheck && 456 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 457 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 458 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 459 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { 460 return classloader_only && 461 Verifier::relax_access_for(accessor_ik->class_loader()) && 462 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 463 accessor_ik->class_loader() == accessee_ik->class_loader(); 464 } 465 466 return false; 467 } 468 469 /* 470 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if: 471 472 Callee T in Callee T in package PT, 473 unnamed module runtime module MT 474 ------------------------------------------------------------------------------------------------ 475 476 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES 477 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES 478 unnamed module: YES 479 Else if (MS can read MT (establish readability) && 480 ((MT exports PT to MS or to all modules) || 481 (MT is open))): YES 482 483 ------------------------------------------------------------------------------------------------ 484 Caller S in unnamed YES Readability exists because unnamed module 485 module UM "reads" all modules 486 if (MT exports PT to UM or to all modules): YES 487 488 ------------------------------------------------------------------------------------------------ 489 490 Note: a loose module is a module that can read all current and future unnamed modules. 491 */ 492 Reflection::VerifyClassAccessResults Reflection::verify_class_access( 493 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) { 494 495 // Verify that current_class can access new_class. If the classloader_only 496 // flag is set, we automatically allow any accesses in which current_class 497 // doesn't have a classloader. 498 if ((current_class == NULL) || 499 (current_class == new_class) || 500 is_same_class_package(current_class, new_class)) { 501 return ACCESS_OK; 502 } 503 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 504 // succeed trivially. 505 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 506 return ACCESS_OK; 507 } 508 509 // module boundaries 510 if (new_class->is_public()) { 511 // Ignore modules for DumpSharedSpaces because we do not have any package 512 // or module information for modules other than java.base. 513 if (DumpSharedSpaces) { 514 return ACCESS_OK; 515 } 516 517 // Find the module entry for current_class, the accessor 518 ModuleEntry* module_from = current_class->module(); 519 // Find the module entry for new_class, the accessee 520 ModuleEntry* module_to = new_class->module(); 521 522 // both in same (possibly unnamed) module 523 if (module_from == module_to) { 524 return ACCESS_OK; 525 } 526 527 // Acceptable access to a type in an unnamed module. Note that since 528 // unnamed modules can read all unnamed modules, this also handles the 529 // case where module_from is also unnamed but in a different class loader. 530 if (!module_to->is_named() && 531 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) { 532 return ACCESS_OK; 533 } 534 535 // Establish readability, check if module_from is allowed to read module_to. 536 if (!module_from->can_read(module_to)) { 537 return MODULE_NOT_READABLE; 538 } 539 540 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported 541 if (module_to->is_open()) { 542 return ACCESS_OK; 543 } 544 545 PackageEntry* package_to = new_class->package(); 546 assert(package_to != NULL, "can not obtain new_class' package"); 547 548 { 549 MutexLocker m1(Module_lock); 550 551 // Once readability is established, if module_to exports T unqualifiedly, 552 // (to all modules), than whether module_from is in the unnamed module 553 // or not does not matter, access is allowed. 554 if (package_to->is_unqual_exported()) { 555 return ACCESS_OK; 556 } 557 558 // Access is allowed if both 1 & 2 hold: 559 // 1. Readability, module_from can read module_to (established above). 560 // 2. Either module_to exports T to module_from qualifiedly. 561 // or 562 // module_to exports T to all unnamed modules and module_from is unnamed. 563 // or 564 // module_to exports T unqualifiedly to all modules (checked above). 565 if (!package_to->is_qexported_to(module_from)) { 566 return TYPE_NOT_EXPORTED; 567 } 568 } 569 return ACCESS_OK; 570 } 571 572 if (can_relax_access_check_for(current_class, new_class, classloader_only)) { 573 return ACCESS_OK; 574 } 575 return OTHER_PROBLEM; 576 } 577 578 // Return an error message specific to the specified Klass*'s and result. 579 // This function must be called from within a block containing a ResourceMark. 580 char* Reflection::verify_class_access_msg(const Klass* current_class, 581 const InstanceKlass* new_class, 582 const VerifyClassAccessResults result) { 583 assert(result != ACCESS_OK, "must be failure result"); 584 char * msg = NULL; 585 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) { 586 // Find the module entry for current_class, the accessor 587 ModuleEntry* module_from = current_class->module(); 588 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE; 589 const char * current_class_name = current_class->external_name(); 590 591 // Find the module entry for new_class, the accessee 592 ModuleEntry* module_to = NULL; 593 module_to = new_class->module(); 594 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE; 595 const char * new_class_name = new_class->external_name(); 596 597 if (result == MODULE_NOT_READABLE) { 598 assert(module_from->is_named(), "Unnamed modules can read all modules"); 599 if (module_to->is_named()) { 600 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) + 601 strlen(new_class_name) + 2*strlen(module_to_name); 602 msg = NEW_RESOURCE_ARRAY(char, len); 603 jio_snprintf(msg, len - 1, 604 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s", 605 current_class_name, module_from_name, new_class_name, 606 module_to_name, module_from_name, module_to_name); 607 } else { 608 oop jlm = module_to->module(); 609 assert(jlm != NULL, "Null jlm in module_to ModuleEntry"); 610 intptr_t identity_hash = jlm->identity_hash(); 611 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) + 612 strlen(new_class_name) + 2*sizeof(uintx); 613 msg = NEW_RESOURCE_ARRAY(char, len); 614 jio_snprintf(msg, len - 1, 615 "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, 616 current_class_name, module_from_name, new_class_name, uintx(identity_hash), 617 module_from_name, uintx(identity_hash)); 618 } 619 620 } else if (result == TYPE_NOT_EXPORTED) { 621 assert(new_class->package() != NULL, 622 "Unnamed packages are always exported"); 623 const char * package_name = 624 new_class->package()->name()->as_klass_external_name(); 625 assert(module_to->is_named(), "Unnamed modules export all packages"); 626 if (module_from->is_named()) { 627 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) + 628 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name); 629 msg = NEW_RESOURCE_ARRAY(char, len); 630 jio_snprintf(msg, len - 1, 631 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s", 632 current_class_name, module_from_name, new_class_name, 633 module_to_name, module_to_name, package_name, module_from_name); 634 } else { 635 oop jlm = module_from->module(); 636 assert(jlm != NULL, "Null jlm in module_from ModuleEntry"); 637 intptr_t identity_hash = jlm->identity_hash(); 638 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) + 639 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx); 640 msg = NEW_RESOURCE_ARRAY(char, len); 641 jio_snprintf(msg, len - 1, 642 "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, 643 current_class_name, uintx(identity_hash), new_class_name, module_to_name, 644 module_to_name, package_name, uintx(identity_hash)); 645 } 646 } else { 647 ShouldNotReachHere(); 648 } 649 } // result != OTHER_PROBLEM... 650 return msg; 651 } 652 653 bool Reflection::verify_field_access(const Klass* current_class, 654 const Klass* resolved_class, 655 const Klass* field_class, 656 AccessFlags access, 657 bool classloader_only, 658 bool protected_restriction) { 659 // Verify that current_class can access a field of field_class, where that 660 // field's access bits are "access". We assume that we've already verified 661 // that current_class can access field_class. 662 // 663 // If the classloader_only flag is set, we automatically allow any accesses 664 // in which current_class doesn't have a classloader. 665 // 666 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 667 // need this distinction (e.g. if all we have is the runtime type, or during 668 // class file parsing when we only care about the static type); in that case 669 // callers should ensure that resolved_class == field_class. 670 // 671 if ((current_class == NULL) || 672 (current_class == field_class) || 673 access.is_public()) { 674 return true; 675 } 676 677 const Klass* host_class = current_class; 678 if (host_class->is_instance_klass() && 679 InstanceKlass::cast(host_class)->is_anonymous()) { 680 host_class = InstanceKlass::cast(host_class)->host_klass(); 681 assert(host_class != NULL, "Anonymous class has null host class"); 682 assert(!(host_class->is_instance_klass() && 683 InstanceKlass::cast(host_class)->is_anonymous()), 684 "host_class should not be anonymous"); 685 } 686 if (host_class == field_class) { 687 return true; 688 } 689 690 if (access.is_protected()) { 691 if (!protected_restriction) { 692 // See if current_class (or outermost host class) is a subclass of field_class 693 // An interface may not access protected members of j.l.Object 694 if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) { 695 if (access.is_static() || // static fields are ok, see 6622385 696 current_class == resolved_class || 697 field_class == resolved_class || 698 host_class->is_subclass_of(resolved_class) || 699 resolved_class->is_subclass_of(host_class)) { 700 return true; 701 } 702 } 703 } 704 } 705 706 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 707 return true; 708 } 709 710 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 711 // succeed trivially. 712 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 713 return true; 714 } 715 716 return can_relax_access_check_for( 717 current_class, field_class, classloader_only); 718 } 719 720 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) { 721 return InstanceKlass::cast(class1)->is_same_class_package(class2); 722 } 723 724 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 725 // throw an incompatible class change exception 726 // If inner_is_member, require the inner to be a member of the outer. 727 // If !inner_is_member, require the inner to be anonymous (a non-member). 728 // Caller is responsible for figuring out in advance which case must be true. 729 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner, 730 bool inner_is_member, TRAPS) { 731 InnerClassesIterator iter(outer); 732 constantPoolHandle cp (THREAD, outer->constants()); 733 for (; !iter.done(); iter.next()) { 734 int ioff = iter.inner_class_info_index(); 735 int ooff = iter.outer_class_info_index(); 736 737 if (inner_is_member && ioff != 0 && ooff != 0) { 738 Klass* o = cp->klass_at(ooff, CHECK); 739 if (o == outer) { 740 Klass* i = cp->klass_at(ioff, CHECK); 741 if (i == inner) { 742 return; 743 } 744 } 745 } 746 if (!inner_is_member && ioff != 0 && ooff == 0 && 747 cp->klass_name_at_matches(inner, ioff)) { 748 Klass* i = cp->klass_at(ioff, CHECK); 749 if (i == inner) { 750 return; 751 } 752 } 753 } 754 755 // 'inner' not declared as an inner klass in outer 756 ResourceMark rm(THREAD); 757 Exceptions::fthrow( 758 THREAD_AND_LOCATION, 759 vmSymbols::java_lang_IncompatibleClassChangeError(), 760 "%s and %s disagree on InnerClasses attribute", 761 outer->external_name(), 762 inner->external_name() 763 ); 764 } 765 766 // Utility method converting a single SignatureStream element into java.lang.Class instance 767 static oop get_mirror_from_signature(const methodHandle& method, 768 SignatureStream* ss, 769 TRAPS) { 770 771 772 if (T_OBJECT == ss->type() || T_ARRAY == ss->type()) { 773 Symbol* name = ss->as_symbol(CHECK_NULL); 774 oop loader = method->method_holder()->class_loader(); 775 oop protection_domain = method->method_holder()->protection_domain(); 776 const Klass* k = SystemDictionary::resolve_or_fail(name, 777 Handle(THREAD, loader), 778 Handle(THREAD, protection_domain), 779 true, 780 CHECK_NULL); 781 if (log_is_enabled(Debug, class, resolve)) { 782 trace_class_resolution(k); 783 } 784 return k->java_mirror(); 785 } 786 787 assert(ss->type() != T_VOID || ss->at_return_type(), 788 "T_VOID should only appear as return type"); 789 790 return java_lang_Class::primitive_mirror(ss->type()); 791 } 792 793 static objArrayHandle get_parameter_types(const methodHandle& method, 794 int parameter_count, 795 oop* return_type, 796 TRAPS) { 797 // Allocate array holding parameter types (java.lang.Class instances) 798 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 799 objArrayHandle mirrors(THREAD, m); 800 int index = 0; 801 // Collect parameter types 802 ResourceMark rm(THREAD); 803 Symbol* signature = method->signature(); 804 SignatureStream ss(signature); 805 while (!ss.at_return_type()) { 806 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 807 mirrors->obj_at_put(index++, mirror); 808 ss.next(); 809 } 810 assert(index == parameter_count, "invalid parameter count"); 811 if (return_type != NULL) { 812 // Collect return type as well 813 assert(ss.at_return_type(), "return type should be present"); 814 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 815 } 816 return mirrors; 817 } 818 819 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) { 820 return method->resolved_checked_exceptions(THREAD); 821 } 822 823 static Handle new_type(Symbol* signature, Klass* k, TRAPS) { 824 // Basic types 825 BasicType type = vmSymbols::signature_type(signature); 826 if (type != T_OBJECT) { 827 return Handle(THREAD, Universe::java_mirror(type)); 828 } 829 830 Klass* result = 831 SystemDictionary::resolve_or_fail(signature, 832 Handle(THREAD, k->class_loader()), 833 Handle(THREAD, k->protection_domain()), 834 true, CHECK_(Handle())); 835 836 if (log_is_enabled(Debug, class, resolve)) { 837 trace_class_resolution(result); 838 } 839 840 oop nt = result->java_mirror(); 841 return Handle(THREAD, nt); 842 } 843 844 845 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) { 846 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 847 assert(!method()->is_initializer() || 848 (for_constant_pool_access && method()->is_static()), 849 "should call new_constructor instead"); 850 InstanceKlass* holder = method->method_holder(); 851 int slot = method->method_idnum(); 852 853 Symbol* signature = method->signature(); 854 int parameter_count = ArgumentCount(signature).size(); 855 oop return_type_oop = NULL; 856 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 857 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 858 859 Handle return_type(THREAD, return_type_oop); 860 861 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 862 863 if (exception_types.is_null()) return NULL; 864 865 Symbol* method_name = method->name(); 866 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 867 Handle name = Handle(THREAD, name_oop); 868 if (name == NULL) return NULL; 869 870 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 871 872 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 873 874 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 875 java_lang_reflect_Method::set_slot(mh(), slot); 876 java_lang_reflect_Method::set_name(mh(), name()); 877 java_lang_reflect_Method::set_return_type(mh(), return_type()); 878 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 879 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 880 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 881 java_lang_reflect_Method::set_override(mh(), false); 882 if (java_lang_reflect_Method::has_signature_field() && 883 method->generic_signature() != NULL) { 884 Symbol* gs = method->generic_signature(); 885 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 886 java_lang_reflect_Method::set_signature(mh(), sig()); 887 } 888 if (java_lang_reflect_Method::has_annotations_field()) { 889 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 890 java_lang_reflect_Method::set_annotations(mh(), an_oop); 891 } 892 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 893 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 894 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 895 } 896 if (java_lang_reflect_Method::has_annotation_default_field()) { 897 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 898 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 899 } 900 if (java_lang_reflect_Method::has_type_annotations_field()) { 901 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 902 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 903 } 904 return mh(); 905 } 906 907 908 oop Reflection::new_constructor(const methodHandle& method, TRAPS) { 909 assert(method()->is_initializer(), "should call new_method instead"); 910 911 InstanceKlass* holder = method->method_holder(); 912 int slot = method->method_idnum(); 913 914 Symbol* signature = method->signature(); 915 int parameter_count = ArgumentCount(signature).size(); 916 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 917 if (parameter_types.is_null()) return NULL; 918 919 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 920 if (exception_types.is_null()) return NULL; 921 922 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 923 924 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 925 926 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 927 java_lang_reflect_Constructor::set_slot(ch(), slot); 928 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 929 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 930 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 931 java_lang_reflect_Constructor::set_override(ch(), false); 932 if (java_lang_reflect_Constructor::has_signature_field() && 933 method->generic_signature() != NULL) { 934 Symbol* gs = method->generic_signature(); 935 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 936 java_lang_reflect_Constructor::set_signature(ch(), sig()); 937 } 938 if (java_lang_reflect_Constructor::has_annotations_field()) { 939 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 940 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 941 } 942 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 943 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 944 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 945 } 946 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 947 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 948 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 949 } 950 return ch(); 951 } 952 953 954 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 955 Symbol* field_name = fd->name(); 956 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 957 Handle name = Handle(THREAD, name_oop); 958 Symbol* signature = fd->signature(); 959 InstanceKlass* holder = fd->field_holder(); 960 Handle type = new_type(signature, holder, CHECK_NULL); 961 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 962 963 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 964 java_lang_reflect_Field::set_slot(rh(), fd->index()); 965 java_lang_reflect_Field::set_name(rh(), name()); 966 java_lang_reflect_Field::set_type(rh(), type()); 967 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 968 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 969 java_lang_reflect_Field::set_override(rh(), false); 970 if (java_lang_reflect_Field::has_signature_field() && 971 fd->has_generic_signature()) { 972 Symbol* gs = fd->generic_signature(); 973 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 974 java_lang_reflect_Field::set_signature(rh(), sig()); 975 } 976 if (java_lang_reflect_Field::has_annotations_field()) { 977 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 978 java_lang_reflect_Field::set_annotations(rh(), an_oop); 979 } 980 if (java_lang_reflect_Field::has_type_annotations_field()) { 981 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 982 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 983 } 984 return rh(); 985 } 986 987 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 988 int flags, TRAPS) { 989 990 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 991 992 if(NULL != sym) { 993 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 994 java_lang_reflect_Parameter::set_name(rh(), name()); 995 } else { 996 java_lang_reflect_Parameter::set_name(rh(), NULL); 997 } 998 999 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 1000 java_lang_reflect_Parameter::set_executable(rh(), method()); 1001 java_lang_reflect_Parameter::set_index(rh(), index); 1002 return rh(); 1003 } 1004 1005 1006 static methodHandle resolve_interface_call(InstanceKlass* klass, 1007 const methodHandle& method, 1008 Klass* recv_klass, 1009 Handle receiver, 1010 TRAPS) { 1011 1012 assert(!method.is_null() , "method should not be null"); 1013 1014 CallInfo info; 1015 Symbol* signature = method->signature(); 1016 Symbol* name = method->name(); 1017 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 1018 LinkInfo(klass, name, signature), 1019 true, 1020 CHECK_(methodHandle())); 1021 return info.selected_method(); 1022 } 1023 1024 // Conversion 1025 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1026 assert(java_lang_Class::is_primitive(basic_type_mirror), 1027 "just checking"); 1028 return java_lang_Class::primitive_type(basic_type_mirror); 1029 } 1030 1031 // Narrowing of basic types. Used to create correct jvalues for 1032 // boolean, byte, char and short return return values from interpreter 1033 // which are returned as ints. Throws IllegalArgumentException. 1034 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1035 switch (narrow_type) { 1036 case T_BOOLEAN: 1037 value->z = (jboolean) (value->i & 1); 1038 return; 1039 case T_BYTE: 1040 value->b = (jbyte)value->i; 1041 return; 1042 case T_CHAR: 1043 value->c = (jchar)value->i; 1044 return; 1045 case T_SHORT: 1046 value->s = (jshort)value->i; 1047 return; 1048 default: 1049 break; // fail 1050 } 1051 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1052 } 1053 1054 1055 // Method call (shared by invoke_method and invoke_constructor) 1056 static oop invoke(InstanceKlass* klass, 1057 const methodHandle& reflected_method, 1058 Handle receiver, 1059 bool override, 1060 objArrayHandle ptypes, 1061 BasicType rtype, 1062 objArrayHandle args, 1063 bool is_method_invoke, 1064 TRAPS) { 1065 1066 ResourceMark rm(THREAD); 1067 1068 methodHandle method; // actual method to invoke 1069 Klass* target_klass; // target klass, receiver's klass for non-static 1070 1071 // Ensure klass is initialized 1072 klass->initialize(CHECK_NULL); 1073 1074 bool is_static = reflected_method->is_static(); 1075 if (is_static) { 1076 // ignore receiver argument 1077 method = reflected_method; 1078 target_klass = klass; 1079 } else { 1080 // check for null receiver 1081 if (receiver.is_null()) { 1082 THROW_0(vmSymbols::java_lang_NullPointerException()); 1083 } 1084 // Check class of receiver against class declaring method 1085 if (!receiver->is_a(klass)) { 1086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 1087 } 1088 // target klass is receiver's klass 1089 target_klass = receiver->klass(); 1090 // no need to resolve if method is private or <init> 1091 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 1092 method = reflected_method; 1093 } else { 1094 // resolve based on the receiver 1095 if (reflected_method->method_holder()->is_interface()) { 1096 // resolve interface call 1097 // 1098 // Match resolution errors with those thrown due to reflection inlining 1099 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 1100 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 1101 if (HAS_PENDING_EXCEPTION) { 1102 // Method resolution threw an exception; wrap it in an InvocationTargetException 1103 oop resolution_exception = PENDING_EXCEPTION; 1104 CLEAR_PENDING_EXCEPTION; 1105 // JVMTI has already reported the pending exception 1106 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1107 if (THREAD->is_Java_thread()) { 1108 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1109 } 1110 JavaCallArguments args(Handle(THREAD, resolution_exception)); 1111 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1112 vmSymbols::throwable_void_signature(), 1113 &args); 1114 } 1115 } else { 1116 // if the method can be overridden, we resolve using the vtable index. 1117 assert(!reflected_method->has_itable_index(), ""); 1118 int index = reflected_method->vtable_index(); 1119 method = reflected_method; 1120 if (index != Method::nonvirtual_vtable_index) { 1121 method = methodHandle(THREAD, target_klass->method_at_vtable(index)); 1122 } 1123 if (!method.is_null()) { 1124 // Check for abstract methods as well 1125 if (method->is_abstract()) { 1126 // new default: 6531596 1127 ResourceMark rm(THREAD); 1128 Handle h_origexception = Exceptions::new_exception(THREAD, 1129 vmSymbols::java_lang_AbstractMethodError(), 1130 Method::name_and_sig_as_C_string(target_klass, 1131 method->name(), 1132 method->signature())); 1133 JavaCallArguments args(h_origexception); 1134 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1135 vmSymbols::throwable_void_signature(), 1136 &args); 1137 } 1138 } 1139 } 1140 } 1141 } 1142 1143 // I believe this is a ShouldNotGetHere case which requires 1144 // an internal vtable bug. If you ever get this please let Karen know. 1145 if (method.is_null()) { 1146 ResourceMark rm(THREAD); 1147 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 1148 Method::name_and_sig_as_C_string(klass, 1149 reflected_method->name(), 1150 reflected_method->signature())); 1151 } 1152 1153 assert(ptypes->is_objArray(), "just checking"); 1154 int args_len = args.is_null() ? 0 : args->length(); 1155 // Check number of arguments 1156 if (ptypes->length() != args_len) { 1157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1158 "wrong number of arguments"); 1159 } 1160 1161 // Create object to contain parameters for the JavaCall 1162 JavaCallArguments java_args(method->size_of_parameters()); 1163 1164 if (!is_static) { 1165 java_args.push_oop(receiver); 1166 } 1167 1168 for (int i = 0; i < args_len; i++) { 1169 oop type_mirror = ptypes->obj_at(i); 1170 oop arg = args->obj_at(i); 1171 if (java_lang_Class::is_primitive(type_mirror)) { 1172 jvalue value; 1173 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1174 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL); 1175 if (ptype != atype) { 1176 Reflection::widen(&value, atype, ptype, CHECK_NULL); 1177 } 1178 switch (ptype) { 1179 case T_BOOLEAN: java_args.push_int(value.z); break; 1180 case T_CHAR: java_args.push_int(value.c); break; 1181 case T_BYTE: java_args.push_int(value.b); break; 1182 case T_SHORT: java_args.push_int(value.s); break; 1183 case T_INT: java_args.push_int(value.i); break; 1184 case T_LONG: java_args.push_long(value.j); break; 1185 case T_FLOAT: java_args.push_float(value.f); break; 1186 case T_DOUBLE: java_args.push_double(value.d); break; 1187 default: 1188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1189 } 1190 } else { 1191 if (arg != NULL) { 1192 Klass* k = java_lang_Class::as_Klass(type_mirror); 1193 if (!arg->is_a(k)) { 1194 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1195 "argument type mismatch"); 1196 } 1197 } 1198 Handle arg_handle(THREAD, arg); // Create handle for argument 1199 java_args.push_oop(arg_handle); // Push handle 1200 } 1201 } 1202 1203 assert(java_args.size_of_parameters() == method->size_of_parameters(), 1204 "just checking"); 1205 1206 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1207 // oop (i.e., NOT as an handle) 1208 JavaValue result(rtype); 1209 JavaCalls::call(&result, method, &java_args, THREAD); 1210 1211 if (HAS_PENDING_EXCEPTION) { 1212 // Method threw an exception; wrap it in an InvocationTargetException 1213 oop target_exception = PENDING_EXCEPTION; 1214 CLEAR_PENDING_EXCEPTION; 1215 // JVMTI has already reported the pending exception 1216 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1217 if (THREAD->is_Java_thread()) { 1218 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1219 } 1220 1221 JavaCallArguments args(Handle(THREAD, target_exception)); 1222 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1223 vmSymbols::throwable_void_signature(), 1224 &args); 1225 } else { 1226 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1227 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL); 1228 } 1229 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD); 1230 } 1231 } 1232 1233 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1234 // of java.lang.reflect.Constructor 1235 1236 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1237 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1238 int slot = java_lang_reflect_Method::slot(method_mirror); 1239 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1240 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1241 1242 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1243 BasicType rtype; 1244 if (java_lang_Class::is_primitive(return_type_mirror)) { 1245 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1246 } else { 1247 rtype = T_OBJECT; 1248 } 1249 1250 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1251 Method* m = klass->method_with_idnum(slot); 1252 if (m == NULL) { 1253 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1254 } 1255 methodHandle method(THREAD, m); 1256 1257 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1258 } 1259 1260 1261 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1262 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1263 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1264 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1265 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1266 1267 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1268 Method* m = klass->method_with_idnum(slot); 1269 if (m == NULL) { 1270 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1271 } 1272 methodHandle method(THREAD, m); 1273 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1274 1275 // Make sure klass gets initialize 1276 klass->initialize(CHECK_NULL); 1277 1278 // Create new instance (the receiver) 1279 klass->check_valid_for_instantiation(false, CHECK_NULL); 1280 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1281 1282 // Ignore result from call and return receiver 1283 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1284 return receiver(); 1285 }