1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 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 "memory/oopFactory.hpp" 36 #include "memory/resourceArea.hpp" 37 #include "memory/universe.inline.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/objArrayKlass.hpp" 40 #include "oops/objArrayOop.inline.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/jvmtiExport.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/handles.inline.hpp" 45 #include "runtime/javaCalls.hpp" 46 #include "runtime/reflection.hpp" 47 #include "runtime/reflectionUtils.hpp" 48 #include "runtime/signature.hpp" 49 #include "runtime/vframe.hpp" 50 51 static void trace_class_resolution(const Klass* to_class) { 52 ResourceMark rm; 53 int line_number = -1; 54 const char * source_file = NULL; 55 Klass* caller = NULL; 56 JavaThread* jthread = JavaThread::current(); 57 if (jthread->has_last_Java_frame()) { 58 vframeStream vfst(jthread); 59 // skip over any frames belonging to java.lang.Class 60 while (!vfst.at_end() && 61 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 62 vfst.next(); 63 } 64 if (!vfst.at_end()) { 65 // this frame is a likely suspect 66 caller = vfst.method()->method_holder(); 67 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 68 Symbol* s = vfst.method()->method_holder()->source_file_name(); 69 if (s != NULL) { 70 source_file = s->as_C_string(); 71 } 72 } 73 } 74 if (caller != NULL) { 75 const char * from = caller->external_name(); 76 const char * to = to_class->external_name(); 77 // print in a single call to reduce interleaving between threads 78 if (source_file != NULL) { 79 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number); 80 } else { 81 log_debug(class, resolve)("%s %s (reflection)", from, to); 82 } 83 } 84 } 85 86 87 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 88 if (type == T_VOID) { 89 return NULL; 90 } 91 if (type == T_OBJECT || type == T_ARRAY) { 92 // regular objects are not boxed 93 return (oop) value->l; 94 } 95 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 96 if (result == NULL) { 97 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 98 } 99 return result; 100 } 101 102 103 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 104 if (box == NULL) { 105 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 106 } 107 return java_lang_boxing_object::get_value(box, value); 108 } 109 110 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 111 // Note: box is really the unboxed oop. It might even be a Short, etc.! 112 value->l = (jobject) box; 113 return T_OBJECT; 114 } 115 116 117 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 118 assert(wide_type != current_type, "widen should not be called with identical types"); 119 switch (wide_type) { 120 case T_BOOLEAN: 121 case T_BYTE: 122 case T_CHAR: 123 break; // fail 124 case T_SHORT: 125 switch (current_type) { 126 case T_BYTE: 127 value->s = (jshort) value->b; 128 return; 129 default: 130 break; 131 } 132 break; // fail 133 case T_INT: 134 switch (current_type) { 135 case T_BYTE: 136 value->i = (jint) value->b; 137 return; 138 case T_CHAR: 139 value->i = (jint) value->c; 140 return; 141 case T_SHORT: 142 value->i = (jint) value->s; 143 return; 144 default: 145 break; 146 } 147 break; // fail 148 case T_LONG: 149 switch (current_type) { 150 case T_BYTE: 151 value->j = (jlong) value->b; 152 return; 153 case T_CHAR: 154 value->j = (jlong) value->c; 155 return; 156 case T_SHORT: 157 value->j = (jlong) value->s; 158 return; 159 case T_INT: 160 value->j = (jlong) value->i; 161 return; 162 default: 163 break; 164 } 165 break; // fail 166 case T_FLOAT: 167 switch (current_type) { 168 case T_BYTE: 169 value->f = (jfloat) value->b; 170 return; 171 case T_CHAR: 172 value->f = (jfloat) value->c; 173 return; 174 case T_SHORT: 175 value->f = (jfloat) value->s; 176 return; 177 case T_INT: 178 value->f = (jfloat) value->i; 179 return; 180 case T_LONG: 181 value->f = (jfloat) value->j; 182 return; 183 default: 184 break; 185 } 186 break; // fail 187 case T_DOUBLE: 188 switch (current_type) { 189 case T_BYTE: 190 value->d = (jdouble) value->b; 191 return; 192 case T_CHAR: 193 value->d = (jdouble) value->c; 194 return; 195 case T_SHORT: 196 value->d = (jdouble) value->s; 197 return; 198 case T_INT: 199 value->d = (jdouble) value->i; 200 return; 201 case T_FLOAT: 202 value->d = (jdouble) value->f; 203 return; 204 case T_LONG: 205 value->d = (jdouble) value->j; 206 return; 207 default: 208 break; 209 } 210 break; // fail 211 default: 212 break; // fail 213 } 214 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 215 } 216 217 218 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 219 if (!a->is_within_bounds(index)) { 220 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 221 } 222 if (a->is_objArray()) { 223 value->l = (jobject) objArrayOop(a)->obj_at(index); 224 return T_OBJECT; 225 } else { 226 assert(a->is_typeArray(), "just checking"); 227 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 228 switch (type) { 229 case T_BOOLEAN: 230 value->z = typeArrayOop(a)->bool_at(index); 231 break; 232 case T_CHAR: 233 value->c = typeArrayOop(a)->char_at(index); 234 break; 235 case T_FLOAT: 236 value->f = typeArrayOop(a)->float_at(index); 237 break; 238 case T_DOUBLE: 239 value->d = typeArrayOop(a)->double_at(index); 240 break; 241 case T_BYTE: 242 value->b = typeArrayOop(a)->byte_at(index); 243 break; 244 case T_SHORT: 245 value->s = typeArrayOop(a)->short_at(index); 246 break; 247 case T_INT: 248 value->i = typeArrayOop(a)->int_at(index); 249 break; 250 case T_LONG: 251 value->j = typeArrayOop(a)->long_at(index); 252 break; 253 default: 254 return T_ILLEGAL; 255 } 256 return type; 257 } 258 } 259 260 261 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 262 if (!a->is_within_bounds(index)) { 263 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 264 } 265 if (a->is_objArray()) { 266 if (value_type == T_OBJECT) { 267 oop obj = (oop) value->l; 268 if (obj != NULL) { 269 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 270 if (!obj->is_a(element_klass)) { 271 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 272 } 273 } 274 objArrayOop(a)->obj_at_put(index, obj); 275 } 276 } else { 277 assert(a->is_typeArray(), "just checking"); 278 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 279 if (array_type != value_type) { 280 // The widen operation can potentially throw an exception, but cannot block, 281 // so typeArrayOop a is safe if the call succeeds. 282 widen(value, value_type, array_type, CHECK); 283 } 284 switch (array_type) { 285 case T_BOOLEAN: 286 typeArrayOop(a)->bool_at_put(index, value->z); 287 break; 288 case T_CHAR: 289 typeArrayOop(a)->char_at_put(index, value->c); 290 break; 291 case T_FLOAT: 292 typeArrayOop(a)->float_at_put(index, value->f); 293 break; 294 case T_DOUBLE: 295 typeArrayOop(a)->double_at_put(index, value->d); 296 break; 297 case T_BYTE: 298 typeArrayOop(a)->byte_at_put(index, value->b); 299 break; 300 case T_SHORT: 301 typeArrayOop(a)->short_at_put(index, value->s); 302 break; 303 case T_INT: 304 typeArrayOop(a)->int_at_put(index, value->i); 305 break; 306 case T_LONG: 307 typeArrayOop(a)->long_at_put(index, value->j); 308 break; 309 default: 310 THROW(vmSymbols::java_lang_IllegalArgumentException()); 311 } 312 } 313 } 314 315 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 316 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 317 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 318 if (type == T_VOID) { 319 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 320 } 321 else { 322 return Universe::typeArrayKlassObj(type); 323 } 324 } 325 326 #ifdef ASSERT 327 static oop basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 328 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 329 return Universe::java_mirror(type); 330 } 331 #endif 332 333 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 334 if (element_mirror == NULL) { 335 THROW_0(vmSymbols::java_lang_NullPointerException()); 336 } 337 if (length < 0) { 338 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 339 } 340 if (java_lang_Class::is_primitive(element_mirror)) { 341 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 342 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 343 } else { 344 Klass* k = java_lang_Class::as_Klass(element_mirror); 345 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 346 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 347 } 348 return oopFactory::new_array(k, length, THREAD); 349 } 350 } 351 352 353 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 354 assert(dim_array->is_typeArray(), "just checking"); 355 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 356 357 if (element_mirror == NULL) { 358 THROW_0(vmSymbols::java_lang_NullPointerException()); 359 } 360 361 int len = dim_array->length(); 362 if (len <= 0 || len > MAX_DIM) { 363 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 364 } 365 366 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 367 for (int i = 0; i < len; i++) { 368 int d = dim_array->int_at(i); 369 if (d < 0) { 370 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 371 } 372 dimensions[i] = d; 373 } 374 375 Klass* klass; 376 int dim = len; 377 if (java_lang_Class::is_primitive(element_mirror)) { 378 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 379 } else { 380 klass = java_lang_Class::as_Klass(element_mirror); 381 if (klass->is_array_klass()) { 382 int k_dim = ArrayKlass::cast(klass)->dimension(); 383 if (k_dim + len > MAX_DIM) { 384 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 385 } 386 dim += k_dim; 387 } 388 } 389 klass = klass->array_klass(dim, CHECK_NULL); 390 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 391 assert(obj->is_array(), "just checking"); 392 return arrayOop(obj); 393 } 394 395 396 oop Reflection::array_component_type(oop mirror, TRAPS) { 397 if (java_lang_Class::is_primitive(mirror)) { 398 return NULL; 399 } 400 401 Klass* klass = java_lang_Class::as_Klass(mirror); 402 if (!klass->is_array_klass()) { 403 return NULL; 404 } 405 406 oop result = java_lang_Class::component_mirror(mirror); 407 #ifdef ASSERT 408 oop result2 = NULL; 409 if (ArrayKlass::cast(klass)->dimension() == 1) { 410 if (klass->is_typeArray_klass()) { 411 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 412 } else { 413 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 414 } 415 } else { 416 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 417 assert(lower_dim->is_array_klass(), "just checking"); 418 result2 = lower_dim->java_mirror(); 419 } 420 assert(result == result2, "results must be consistent"); 421 #endif //ASSERT 422 return result; 423 } 424 425 static bool under_host_klass(const InstanceKlass* ik, const InstanceKlass* host_klass) { 426 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 427 for (;;) { 428 const InstanceKlass* hc = ik->host_klass(); 429 if (hc == NULL) return false; 430 if (hc == host_klass) return true; 431 ik = hc; 432 433 // There's no way to make a host class loop short of patching memory. 434 // Therefore there cannot be a loop here unless there's another bug. 435 // Still, let's check for it. 436 assert(--inf_loop_check > 0, "no host_klass loop"); 437 } 438 } 439 440 static bool can_relax_access_check_for(const Klass* accessor, 441 const Klass* accessee, 442 bool classloader_only) { 443 444 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 445 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 446 447 // If either is on the other's host_klass chain, access is OK, 448 // because one is inside the other. 449 if (under_host_klass(accessor_ik, accessee_ik) || 450 under_host_klass(accessee_ik, accessor_ik)) 451 return true; 452 453 if ((RelaxAccessControlCheck && 454 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 455 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 456 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 457 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { 458 return classloader_only && 459 Verifier::relax_access_for(accessor_ik->class_loader()) && 460 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 461 accessor_ik->class_loader() == accessee_ik->class_loader(); 462 } 463 464 return false; 465 } 466 467 /* 468 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if: 469 470 Callee T in Callee T in package PT, 471 unnamed module runtime module MT 472 ------------------------------------------------------------------------------------------------ 473 474 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES 475 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES 476 unnamed module: YES 477 Else if (MS can read MT (establish readability) && 478 ((MT exports PT to MS or to all modules) || 479 (MT is open))): YES 480 481 ------------------------------------------------------------------------------------------------ 482 Caller S in unnamed YES Readability exists because unnamed module 483 module UM "reads" all modules 484 if (MT exports PT to UM or to all modules): YES 485 486 ------------------------------------------------------------------------------------------------ 487 488 Note: a loose module is a module that can read all current and future unnamed modules. 489 */ 490 Reflection::VerifyClassAccessResults Reflection::verify_class_access( 491 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) { 492 493 // Verify that current_class can access new_class. If the classloader_only 494 // flag is set, we automatically allow any accesses in which current_class 495 // doesn't have a classloader. 496 if ((current_class == NULL) || 497 (current_class == new_class) || 498 is_same_class_package(current_class, new_class)) { 499 return ACCESS_OK; 500 } 501 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 502 // succeed trivially. 503 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 504 return ACCESS_OK; 505 } 506 507 // module boundaries 508 if (new_class->is_public()) { 509 // Ignore modules for DumpSharedSpaces because we do not have any package 510 // or module information for modules other than java.base. 511 if (DumpSharedSpaces) { 512 return ACCESS_OK; 513 } 514 515 // Find the module entry for current_class, the accessor 516 ModuleEntry* module_from = current_class->module(); 517 // Find the module entry for new_class, the accessee 518 ModuleEntry* module_to = new_class->module(); 519 520 // both in same (possibly unnamed) module 521 if (module_from == module_to) { 522 return ACCESS_OK; 523 } 524 525 // Acceptable access to a type in an unnamed module. Note that since 526 // unnamed modules can read all unnamed modules, this also handles the 527 // case where module_from is also unnamed but in a different class loader. 528 if (!module_to->is_named() && 529 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) { 530 return ACCESS_OK; 531 } 532 533 // Establish readability, check if module_from is allowed to read module_to. 534 if (!module_from->can_read(module_to)) { 535 return MODULE_NOT_READABLE; 536 } 537 538 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported 539 if (module_to->is_open()) { 540 return ACCESS_OK; 541 } 542 543 PackageEntry* package_to = new_class->package(); 544 assert(package_to != NULL, "can not obtain new_class' package"); 545 546 { 547 MutexLocker m1(Module_lock); 548 549 // Once readability is established, if module_to exports T unqualifiedly, 550 // (to all modules), than whether module_from is in the unnamed module 551 // or not does not matter, access is allowed. 552 if (package_to->is_unqual_exported()) { 553 return ACCESS_OK; 554 } 555 556 // Access is allowed if both 1 & 2 hold: 557 // 1. Readability, module_from can read module_to (established above). 558 // 2. Either module_to exports T to module_from qualifiedly. 559 // or 560 // module_to exports T to all unnamed modules and module_from is unnamed. 561 // or 562 // module_to exports T unqualifiedly to all modules (checked above). 563 if (!package_to->is_qexported_to(module_from)) { 564 return TYPE_NOT_EXPORTED; 565 } 566 } 567 return ACCESS_OK; 568 } 569 570 if (can_relax_access_check_for(current_class, new_class, classloader_only)) { 571 return ACCESS_OK; 572 } 573 return OTHER_PROBLEM; 574 } 575 576 // Return an error message specific to the specified Klass*'s and result. 577 // This function must be called from within a block containing a ResourceMark. 578 char* Reflection::verify_class_access_msg(const Klass* current_class, 579 const InstanceKlass* new_class, 580 const VerifyClassAccessResults result) { 581 assert(result != ACCESS_OK, "must be failure result"); 582 char * msg = NULL; 583 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) { 584 // Find the module entry for current_class, the accessor 585 ModuleEntry* module_from = current_class->module(); 586 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE; 587 const char * current_class_name = current_class->external_name(); 588 589 // Find the module entry for new_class, the accessee 590 ModuleEntry* module_to = NULL; 591 module_to = new_class->module(); 592 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE; 593 const char * new_class_name = new_class->external_name(); 594 595 if (result == MODULE_NOT_READABLE) { 596 assert(module_from->is_named(), "Unnamed modules can read all modules"); 597 if (module_to->is_named()) { 598 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) + 599 strlen(new_class_name) + 2*strlen(module_to_name); 600 msg = NEW_RESOURCE_ARRAY(char, len); 601 jio_snprintf(msg, len - 1, 602 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s", 603 current_class_name, module_from_name, new_class_name, 604 module_to_name, module_from_name, module_to_name); 605 } else { 606 oop jlm = module_to->module(); 607 assert(jlm != NULL, "Null jlm in module_to ModuleEntry"); 608 intptr_t identity_hash = jlm->identity_hash(); 609 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) + 610 strlen(new_class_name) + 2*sizeof(uintx); 611 msg = NEW_RESOURCE_ARRAY(char, len); 612 jio_snprintf(msg, len - 1, 613 "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, 614 current_class_name, module_from_name, new_class_name, uintx(identity_hash), 615 module_from_name, uintx(identity_hash)); 616 } 617 618 } else if (result == TYPE_NOT_EXPORTED) { 619 assert(new_class->package() != NULL, 620 "Unnamed packages are always exported"); 621 const char * package_name = 622 new_class->package()->name()->as_klass_external_name(); 623 assert(module_to->is_named(), "Unnamed modules export all packages"); 624 if (module_from->is_named()) { 625 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) + 626 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name); 627 msg = NEW_RESOURCE_ARRAY(char, len); 628 jio_snprintf(msg, len - 1, 629 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s", 630 current_class_name, module_from_name, new_class_name, 631 module_to_name, module_to_name, package_name, module_from_name); 632 } else { 633 oop jlm = module_from->module(); 634 assert(jlm != NULL, "Null jlm in module_from ModuleEntry"); 635 intptr_t identity_hash = jlm->identity_hash(); 636 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) + 637 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx); 638 msg = NEW_RESOURCE_ARRAY(char, len); 639 jio_snprintf(msg, len - 1, 640 "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, 641 current_class_name, uintx(identity_hash), new_class_name, module_to_name, 642 module_to_name, package_name, uintx(identity_hash)); 643 } 644 } else { 645 ShouldNotReachHere(); 646 } 647 } // result != OTHER_PROBLEM... 648 return msg; 649 } 650 651 bool Reflection::verify_field_access(const Klass* current_class, 652 const Klass* resolved_class, 653 const Klass* field_class, 654 AccessFlags access, 655 bool classloader_only, 656 bool protected_restriction) { 657 // Verify that current_class can access a field of field_class, where that 658 // field's access bits are "access". We assume that we've already verified 659 // that current_class can access field_class. 660 // 661 // If the classloader_only flag is set, we automatically allow any accesses 662 // in which current_class doesn't have a classloader. 663 // 664 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 665 // need this distinction (e.g. if all we have is the runtime type, or during 666 // class file parsing when we only care about the static type); in that case 667 // callers should ensure that resolved_class == field_class. 668 // 669 if ((current_class == NULL) || 670 (current_class == field_class) || 671 access.is_public()) { 672 return true; 673 } 674 675 const Klass* host_class = current_class; 676 if (host_class->is_instance_klass() && 677 InstanceKlass::cast(host_class)->is_anonymous()) { 678 host_class = InstanceKlass::cast(host_class)->host_klass(); 679 assert(host_class != NULL, "Anonymous class has null host class"); 680 assert(!(host_class->is_instance_klass() && 681 InstanceKlass::cast(host_class)->is_anonymous()), 682 "host_class should not be anonymous"); 683 684 // For Minimal Value Types check if the field class is a value type 685 // if so check if it has a Value Capable Class that is the host class, 686 // if so use the field class the host class 687 if (field_class->is_value() && 688 InstanceKlass::cast(field_class)->get_vcc_klass() == host_class) { 689 host_class = field_class; 690 } 691 } 692 if (host_class == field_class) { 693 return true; 694 } 695 696 if (access.is_protected()) { 697 if (!protected_restriction) { 698 // See if current_class (or outermost host class) is a subclass of field_class 699 // An interface may not access protected members of j.l.Object 700 if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) { 701 if (access.is_static() || // static fields are ok, see 6622385 702 current_class == resolved_class || 703 field_class == resolved_class || 704 host_class->is_subclass_of(resolved_class) || 705 resolved_class->is_subclass_of(host_class)) { 706 return true; 707 } 708 } 709 } 710 } 711 712 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 713 return true; 714 } 715 716 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 717 // succeed trivially. 718 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 719 return true; 720 } 721 722 return can_relax_access_check_for( 723 current_class, field_class, classloader_only); 724 } 725 726 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) { 727 return InstanceKlass::cast(class1)->is_same_class_package(class2); 728 } 729 730 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 731 // throw an incompatible class change exception 732 // If inner_is_member, require the inner to be a member of the outer. 733 // If !inner_is_member, require the inner to be anonymous (a non-member). 734 // Caller is responsible for figuring out in advance which case must be true. 735 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner, 736 bool inner_is_member, TRAPS) { 737 InnerClassesIterator iter(outer); 738 constantPoolHandle cp (THREAD, outer->constants()); 739 for (; !iter.done(); iter.next()) { 740 int ioff = iter.inner_class_info_index(); 741 int ooff = iter.outer_class_info_index(); 742 743 if (inner_is_member && ioff != 0 && ooff != 0) { 744 Klass* o = cp->klass_at(ooff, CHECK); 745 if (o == outer) { 746 Klass* i = cp->klass_at(ioff, CHECK); 747 if (i == inner) { 748 return; 749 } 750 } 751 } 752 if (!inner_is_member && ioff != 0 && ooff == 0 && 753 cp->klass_name_at_matches(inner, ioff)) { 754 Klass* i = cp->klass_at(ioff, CHECK); 755 if (i == inner) { 756 return; 757 } 758 } 759 } 760 761 // 'inner' not declared as an inner klass in outer 762 ResourceMark rm(THREAD); 763 Exceptions::fthrow( 764 THREAD_AND_LOCATION, 765 vmSymbols::java_lang_IncompatibleClassChangeError(), 766 "%s and %s disagree on InnerClasses attribute", 767 outer->external_name(), 768 inner->external_name() 769 ); 770 } 771 772 // Utility method converting a single SignatureStream element into java.lang.Class instance 773 static oop get_mirror_from_signature(const methodHandle& method, 774 SignatureStream* ss, 775 TRAPS) { 776 777 778 if (T_OBJECT == ss->type() || T_ARRAY == ss->type() || T_VALUETYPE == ss->type()) { 779 Symbol* name = ss->as_symbol(CHECK_NULL); 780 oop loader = method->method_holder()->class_loader(); 781 oop protection_domain = method->method_holder()->protection_domain(); 782 const Klass* k = SystemDictionary::resolve_or_fail(name, 783 Handle(THREAD, loader), 784 Handle(THREAD, protection_domain), 785 true, 786 CHECK_NULL); 787 if (log_is_enabled(Debug, class, resolve)) { 788 trace_class_resolution(k); 789 } 790 return k->java_mirror(); 791 } 792 793 assert(ss->type() != T_VOID || ss->at_return_type(), 794 "T_VOID should only appear as return type"); 795 796 return java_lang_Class::primitive_mirror(ss->type()); 797 } 798 799 static objArrayHandle get_parameter_types(const methodHandle& method, 800 int parameter_count, 801 oop* return_type, 802 TRAPS) { 803 // Allocate array holding parameter types (java.lang.Class instances) 804 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 805 objArrayHandle mirrors(THREAD, m); 806 int index = 0; 807 // Collect parameter types 808 ResourceMark rm(THREAD); 809 Symbol* signature = method->signature(); 810 SignatureStream ss(signature); 811 while (!ss.at_return_type()) { 812 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 813 mirrors->obj_at_put(index++, mirror); 814 ss.next(); 815 } 816 assert(index == parameter_count, "invalid parameter count"); 817 if (return_type != NULL) { 818 // Collect return type as well 819 assert(ss.at_return_type(), "return type should be present"); 820 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 821 } 822 return mirrors; 823 } 824 825 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) { 826 return method->resolved_checked_exceptions(THREAD); 827 } 828 829 static Handle new_type(Symbol* signature, Klass* k, TRAPS) { 830 // Basic types 831 BasicType type = vmSymbols::signature_type(signature); 832 if (type != T_OBJECT && type != T_VALUETYPE) { 833 return Handle(THREAD, Universe::java_mirror(type)); 834 } 835 836 Klass* result = 837 SystemDictionary::resolve_or_fail(signature, 838 Handle(THREAD, k->class_loader()), 839 Handle(THREAD, k->protection_domain()), 840 true, CHECK_(Handle())); 841 842 if (log_is_enabled(Debug, class, resolve)) { 843 trace_class_resolution(result); 844 } 845 846 oop nt = result->java_mirror(); 847 return Handle(THREAD, nt); 848 } 849 850 851 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) { 852 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 853 assert(!method()->is_initializer() || 854 (for_constant_pool_access && method()->is_static()), 855 "should call new_constructor instead"); 856 InstanceKlass* holder = method->method_holder(); 857 int slot = method->method_idnum(); 858 859 Symbol* signature = method->signature(); 860 int parameter_count = ArgumentCount(signature).size(); 861 oop return_type_oop = NULL; 862 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 863 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 864 865 Handle return_type(THREAD, return_type_oop); 866 867 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 868 869 if (exception_types.is_null()) return NULL; 870 871 Symbol* method_name = method->name(); 872 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 873 Handle name = Handle(THREAD, name_oop); 874 if (name == NULL) return NULL; 875 876 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 877 878 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 879 880 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 881 java_lang_reflect_Method::set_slot(mh(), slot); 882 java_lang_reflect_Method::set_name(mh(), name()); 883 java_lang_reflect_Method::set_return_type(mh(), return_type()); 884 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 885 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 886 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 887 java_lang_reflect_Method::set_override(mh(), false); 888 if (java_lang_reflect_Method::has_signature_field() && 889 method->generic_signature() != NULL) { 890 Symbol* gs = method->generic_signature(); 891 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 892 java_lang_reflect_Method::set_signature(mh(), sig()); 893 } 894 if (java_lang_reflect_Method::has_annotations_field()) { 895 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 896 java_lang_reflect_Method::set_annotations(mh(), an_oop); 897 } 898 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 899 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 900 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 901 } 902 if (java_lang_reflect_Method::has_annotation_default_field()) { 903 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 904 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 905 } 906 if (java_lang_reflect_Method::has_type_annotations_field()) { 907 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 908 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 909 } 910 return mh(); 911 } 912 913 914 oop Reflection::new_constructor(const methodHandle& method, TRAPS) { 915 assert(method()->is_initializer(), "should call new_method instead"); 916 917 InstanceKlass* holder = method->method_holder(); 918 int slot = method->method_idnum(); 919 920 Symbol* signature = method->signature(); 921 int parameter_count = ArgumentCount(signature).size(); 922 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 923 if (parameter_types.is_null()) return NULL; 924 925 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 926 if (exception_types.is_null()) return NULL; 927 928 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 929 930 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 931 932 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 933 java_lang_reflect_Constructor::set_slot(ch(), slot); 934 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 935 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 936 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 937 java_lang_reflect_Constructor::set_override(ch(), false); 938 if (java_lang_reflect_Constructor::has_signature_field() && 939 method->generic_signature() != NULL) { 940 Symbol* gs = method->generic_signature(); 941 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 942 java_lang_reflect_Constructor::set_signature(ch(), sig()); 943 } 944 if (java_lang_reflect_Constructor::has_annotations_field()) { 945 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 946 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 947 } 948 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 949 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 950 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 951 } 952 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 953 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 954 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 955 } 956 return ch(); 957 } 958 959 960 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 961 Symbol* field_name = fd->name(); 962 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 963 Handle name = Handle(THREAD, name_oop); 964 Symbol* signature = fd->signature(); 965 InstanceKlass* holder = fd->field_holder(); 966 Handle type = new_type(signature, holder, CHECK_NULL); 967 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 968 969 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 970 java_lang_reflect_Field::set_slot(rh(), fd->index()); 971 java_lang_reflect_Field::set_name(rh(), name()); 972 java_lang_reflect_Field::set_type(rh(), type()); 973 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 974 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 975 java_lang_reflect_Field::set_override(rh(), false); 976 if (java_lang_reflect_Field::has_signature_field() && 977 fd->has_generic_signature()) { 978 Symbol* gs = fd->generic_signature(); 979 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 980 java_lang_reflect_Field::set_signature(rh(), sig()); 981 } 982 if (java_lang_reflect_Field::has_annotations_field()) { 983 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 984 java_lang_reflect_Field::set_annotations(rh(), an_oop); 985 } 986 if (java_lang_reflect_Field::has_type_annotations_field()) { 987 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 988 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 989 } 990 return rh(); 991 } 992 993 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 994 int flags, TRAPS) { 995 996 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 997 998 if(NULL != sym) { 999 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1000 java_lang_reflect_Parameter::set_name(rh(), name()); 1001 } else { 1002 java_lang_reflect_Parameter::set_name(rh(), NULL); 1003 } 1004 1005 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 1006 java_lang_reflect_Parameter::set_executable(rh(), method()); 1007 java_lang_reflect_Parameter::set_index(rh(), index); 1008 return rh(); 1009 } 1010 1011 1012 static methodHandle resolve_interface_call(InstanceKlass* klass, 1013 const methodHandle& method, 1014 Klass* recv_klass, 1015 Handle receiver, 1016 TRAPS) { 1017 1018 assert(!method.is_null() , "method should not be null"); 1019 1020 CallInfo info; 1021 Symbol* signature = method->signature(); 1022 Symbol* name = method->name(); 1023 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 1024 LinkInfo(klass, name, signature), 1025 true, 1026 CHECK_(methodHandle())); 1027 return info.selected_method(); 1028 } 1029 1030 // Conversion 1031 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1032 assert(java_lang_Class::is_primitive(basic_type_mirror), 1033 "just checking"); 1034 return java_lang_Class::primitive_type(basic_type_mirror); 1035 } 1036 1037 // Narrowing of basic types. Used to create correct jvalues for 1038 // boolean, byte, char and short return return values from interpreter 1039 // which are returned as ints. Throws IllegalArgumentException. 1040 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1041 switch (narrow_type) { 1042 case T_BOOLEAN: 1043 value->z = (jboolean) (value->i & 1); 1044 return; 1045 case T_BYTE: 1046 value->b = (jbyte)value->i; 1047 return; 1048 case T_CHAR: 1049 value->c = (jchar)value->i; 1050 return; 1051 case T_SHORT: 1052 value->s = (jshort)value->i; 1053 return; 1054 default: 1055 break; // fail 1056 } 1057 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1058 } 1059 1060 1061 // Method call (shared by invoke_method and invoke_constructor) 1062 static oop invoke(InstanceKlass* klass, 1063 const methodHandle& reflected_method, 1064 Handle receiver, 1065 bool override, 1066 objArrayHandle ptypes, 1067 BasicType rtype, 1068 objArrayHandle args, 1069 bool is_method_invoke, 1070 TRAPS) { 1071 1072 ResourceMark rm(THREAD); 1073 1074 methodHandle method; // actual method to invoke 1075 Klass* target_klass; // target klass, receiver's klass for non-static 1076 1077 // Ensure klass is initialized 1078 klass->initialize(CHECK_NULL); 1079 1080 bool is_static = reflected_method->is_static(); 1081 if (is_static) { 1082 // ignore receiver argument 1083 method = reflected_method; 1084 target_klass = klass; 1085 } else { 1086 // check for null receiver 1087 if (receiver.is_null()) { 1088 THROW_0(vmSymbols::java_lang_NullPointerException()); 1089 } 1090 // Check class of receiver against class declaring method 1091 if (!receiver->is_a(klass)) { 1092 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 1093 } 1094 // target klass is receiver's klass 1095 target_klass = receiver->klass(); 1096 // no need to resolve if method is private or <init> 1097 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 1098 method = reflected_method; 1099 } else { 1100 // resolve based on the receiver 1101 if (reflected_method->method_holder()->is_interface()) { 1102 // resolve interface call 1103 // 1104 // Match resolution errors with those thrown due to reflection inlining 1105 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 1106 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 1107 if (HAS_PENDING_EXCEPTION) { 1108 // Method resolution threw an exception; wrap it in an InvocationTargetException 1109 oop resolution_exception = PENDING_EXCEPTION; 1110 CLEAR_PENDING_EXCEPTION; 1111 // JVMTI has already reported the pending exception 1112 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1113 if (THREAD->is_Java_thread()) { 1114 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1115 } 1116 JavaCallArguments args(Handle(THREAD, resolution_exception)); 1117 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1118 vmSymbols::throwable_void_signature(), 1119 &args); 1120 } 1121 } else { 1122 // if the method can be overridden, we resolve using the vtable index. 1123 assert(!reflected_method->has_itable_index(), ""); 1124 int index = reflected_method->vtable_index(); 1125 method = reflected_method; 1126 if (index != Method::nonvirtual_vtable_index) { 1127 method = methodHandle(THREAD, target_klass->method_at_vtable(index)); 1128 } 1129 if (!method.is_null()) { 1130 // Check for abstract methods as well 1131 if (method->is_abstract()) { 1132 // new default: 6531596 1133 ResourceMark rm(THREAD); 1134 Handle h_origexception = Exceptions::new_exception(THREAD, 1135 vmSymbols::java_lang_AbstractMethodError(), 1136 Method::name_and_sig_as_C_string(target_klass, 1137 method->name(), 1138 method->signature())); 1139 JavaCallArguments args(h_origexception); 1140 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1141 vmSymbols::throwable_void_signature(), 1142 &args); 1143 } 1144 } 1145 } 1146 } 1147 } 1148 1149 // I believe this is a ShouldNotGetHere case which requires 1150 // an internal vtable bug. If you ever get this please let Karen know. 1151 if (method.is_null()) { 1152 ResourceMark rm(THREAD); 1153 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 1154 Method::name_and_sig_as_C_string(klass, 1155 reflected_method->name(), 1156 reflected_method->signature())); 1157 } 1158 1159 assert(ptypes->is_objArray(), "just checking"); 1160 int args_len = args.is_null() ? 0 : args->length(); 1161 // Check number of arguments 1162 if (ptypes->length() != args_len) { 1163 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1164 "wrong number of arguments"); 1165 } 1166 1167 // Create object to contain parameters for the JavaCall 1168 JavaCallArguments java_args(method->size_of_parameters()); 1169 1170 if (!is_static) { 1171 java_args.push_oop(receiver); 1172 } 1173 1174 for (int i = 0; i < args_len; i++) { 1175 oop type_mirror = ptypes->obj_at(i); 1176 oop arg = args->obj_at(i); 1177 if (java_lang_Class::is_primitive(type_mirror)) { 1178 jvalue value; 1179 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1180 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL); 1181 if (ptype != atype) { 1182 Reflection::widen(&value, atype, ptype, CHECK_NULL); 1183 } 1184 switch (ptype) { 1185 case T_BOOLEAN: java_args.push_int(value.z); break; 1186 case T_CHAR: java_args.push_int(value.c); break; 1187 case T_BYTE: java_args.push_int(value.b); break; 1188 case T_SHORT: java_args.push_int(value.s); break; 1189 case T_INT: java_args.push_int(value.i); break; 1190 case T_LONG: java_args.push_long(value.j); break; 1191 case T_FLOAT: java_args.push_float(value.f); break; 1192 case T_DOUBLE: java_args.push_double(value.d); break; 1193 default: 1194 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1195 } 1196 } else { 1197 if (arg != NULL) { 1198 Klass* k = java_lang_Class::as_Klass(type_mirror); 1199 if (!arg->is_a(k)) { 1200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1201 "argument type mismatch"); 1202 } 1203 } 1204 Handle arg_handle(THREAD, arg); // Create handle for argument 1205 java_args.push_oop(arg_handle); // Push handle 1206 } 1207 } 1208 1209 assert(java_args.size_of_parameters() == method->size_of_parameters(), 1210 "just checking"); 1211 1212 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1213 // oop (i.e., NOT as an handle) 1214 JavaValue result(rtype); 1215 JavaCalls::call(&result, method, &java_args, THREAD); 1216 1217 if (HAS_PENDING_EXCEPTION) { 1218 // Method threw an exception; wrap it in an InvocationTargetException 1219 oop target_exception = PENDING_EXCEPTION; 1220 CLEAR_PENDING_EXCEPTION; 1221 // JVMTI has already reported the pending exception 1222 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1223 if (THREAD->is_Java_thread()) { 1224 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1225 } 1226 1227 JavaCallArguments args(Handle(THREAD, target_exception)); 1228 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1229 vmSymbols::throwable_void_signature(), 1230 &args); 1231 } else { 1232 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1233 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL); 1234 } 1235 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD); 1236 } 1237 } 1238 1239 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1240 // of java.lang.reflect.Constructor 1241 1242 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1243 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1244 int slot = java_lang_reflect_Method::slot(method_mirror); 1245 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1246 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1247 1248 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1249 BasicType rtype; 1250 if (java_lang_Class::is_primitive(return_type_mirror)) { 1251 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1252 } else { 1253 rtype = T_OBJECT; 1254 } 1255 1256 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1257 Method* m = klass->method_with_idnum(slot); 1258 if (m == NULL) { 1259 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1260 } 1261 methodHandle method(THREAD, m); 1262 1263 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1264 } 1265 1266 1267 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1268 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1269 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1270 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1271 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1272 1273 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1274 Method* m = klass->method_with_idnum(slot); 1275 if (m == NULL) { 1276 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1277 } 1278 methodHandle method(THREAD, m); 1279 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1280 1281 // Make sure klass gets initialize 1282 klass->initialize(CHECK_NULL); 1283 1284 // Create new instance (the receiver) 1285 klass->check_valid_for_instantiation(false, CHECK_NULL); 1286 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1287 1288 // Ignore result from call and return receiver 1289 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1290 return receiver(); 1291 }