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/fieldDescriptor.inline.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/reflection.hpp" 50 #include "runtime/reflectionUtils.hpp" 51 #include "runtime/signature.hpp" 52 #include "runtime/vframe.inline.hpp" 53 54 static void trace_class_resolution(const Klass* to_class) { 55 ResourceMark rm; 56 int line_number = -1; 57 const char * source_file = NULL; 58 Klass* caller = NULL; 59 JavaThread* jthread = JavaThread::current(); 60 if (jthread->has_last_Java_frame()) { 61 vframeStream vfst(jthread); 62 // skip over any frames belonging to java.lang.Class 63 while (!vfst.at_end() && 64 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 65 vfst.next(); 66 } 67 if (!vfst.at_end()) { 68 // this frame is a likely suspect 69 caller = vfst.method()->method_holder(); 70 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 71 Symbol* s = vfst.method()->method_holder()->source_file_name(); 72 if (s != NULL) { 73 source_file = s->as_C_string(); 74 } 75 } 76 } 77 if (caller != NULL) { 78 const char * from = caller->external_name(); 79 const char * to = to_class->external_name(); 80 // print in a single call to reduce interleaving between threads 81 if (source_file != NULL) { 82 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number); 83 } else { 84 log_debug(class, resolve)("%s %s (reflection)", from, to); 85 } 86 } 87 } 88 89 90 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 91 if (type == T_VOID) { 92 return NULL; 93 } 94 if (type == T_OBJECT || type == T_ARRAY) { 95 // regular objects are not boxed 96 return (oop) value->l; 97 } 98 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 99 if (result == NULL) { 100 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 101 } 102 return result; 103 } 104 105 106 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 107 if (box == NULL) { 108 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 109 } 110 return java_lang_boxing_object::get_value(box, value); 111 } 112 113 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 114 // Note: box is really the unboxed oop. It might even be a Short, etc.! 115 value->l = (jobject) box; 116 return T_OBJECT; 117 } 118 119 120 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 121 assert(wide_type != current_type, "widen should not be called with identical types"); 122 switch (wide_type) { 123 case T_BOOLEAN: 124 case T_BYTE: 125 case T_CHAR: 126 break; // fail 127 case T_SHORT: 128 switch (current_type) { 129 case T_BYTE: 130 value->s = (jshort) value->b; 131 return; 132 default: 133 break; 134 } 135 break; // fail 136 case T_INT: 137 switch (current_type) { 138 case T_BYTE: 139 value->i = (jint) value->b; 140 return; 141 case T_CHAR: 142 value->i = (jint) value->c; 143 return; 144 case T_SHORT: 145 value->i = (jint) value->s; 146 return; 147 default: 148 break; 149 } 150 break; // fail 151 case T_LONG: 152 switch (current_type) { 153 case T_BYTE: 154 value->j = (jlong) value->b; 155 return; 156 case T_CHAR: 157 value->j = (jlong) value->c; 158 return; 159 case T_SHORT: 160 value->j = (jlong) value->s; 161 return; 162 case T_INT: 163 value->j = (jlong) value->i; 164 return; 165 default: 166 break; 167 } 168 break; // fail 169 case T_FLOAT: 170 switch (current_type) { 171 case T_BYTE: 172 value->f = (jfloat) value->b; 173 return; 174 case T_CHAR: 175 value->f = (jfloat) value->c; 176 return; 177 case T_SHORT: 178 value->f = (jfloat) value->s; 179 return; 180 case T_INT: 181 value->f = (jfloat) value->i; 182 return; 183 case T_LONG: 184 value->f = (jfloat) value->j; 185 return; 186 default: 187 break; 188 } 189 break; // fail 190 case T_DOUBLE: 191 switch (current_type) { 192 case T_BYTE: 193 value->d = (jdouble) value->b; 194 return; 195 case T_CHAR: 196 value->d = (jdouble) value->c; 197 return; 198 case T_SHORT: 199 value->d = (jdouble) value->s; 200 return; 201 case T_INT: 202 value->d = (jdouble) value->i; 203 return; 204 case T_FLOAT: 205 value->d = (jdouble) value->f; 206 return; 207 case T_LONG: 208 value->d = (jdouble) value->j; 209 return; 210 default: 211 break; 212 } 213 break; // fail 214 default: 215 break; // fail 216 } 217 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 218 } 219 220 221 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 222 if (!a->is_within_bounds(index)) { 223 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 224 } 225 if (a->is_objArray()) { 226 value->l = (jobject) objArrayOop(a)->obj_at(index); 227 return T_OBJECT; 228 } else { 229 assert(a->is_typeArray(), "just checking"); 230 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 231 switch (type) { 232 case T_BOOLEAN: 233 value->z = typeArrayOop(a)->bool_at(index); 234 break; 235 case T_CHAR: 236 value->c = typeArrayOop(a)->char_at(index); 237 break; 238 case T_FLOAT: 239 value->f = typeArrayOop(a)->float_at(index); 240 break; 241 case T_DOUBLE: 242 value->d = typeArrayOop(a)->double_at(index); 243 break; 244 case T_BYTE: 245 value->b = typeArrayOop(a)->byte_at(index); 246 break; 247 case T_SHORT: 248 value->s = typeArrayOop(a)->short_at(index); 249 break; 250 case T_INT: 251 value->i = typeArrayOop(a)->int_at(index); 252 break; 253 case T_LONG: 254 value->j = typeArrayOop(a)->long_at(index); 255 break; 256 default: 257 return T_ILLEGAL; 258 } 259 return type; 260 } 261 } 262 263 264 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 265 if (!a->is_within_bounds(index)) { 266 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 267 } 268 if (a->is_objArray()) { 269 if (value_type == T_OBJECT) { 270 oop obj = (oop) value->l; 271 if (obj != NULL) { 272 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 273 if (!obj->is_a(element_klass)) { 274 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 275 } 276 } 277 objArrayOop(a)->obj_at_put(index, obj); 278 } 279 } else { 280 assert(a->is_typeArray(), "just checking"); 281 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 282 if (array_type != value_type) { 283 // The widen operation can potentially throw an exception, but cannot block, 284 // so typeArrayOop a is safe if the call succeeds. 285 widen(value, value_type, array_type, CHECK); 286 } 287 switch (array_type) { 288 case T_BOOLEAN: 289 typeArrayOop(a)->bool_at_put(index, value->z); 290 break; 291 case T_CHAR: 292 typeArrayOop(a)->char_at_put(index, value->c); 293 break; 294 case T_FLOAT: 295 typeArrayOop(a)->float_at_put(index, value->f); 296 break; 297 case T_DOUBLE: 298 typeArrayOop(a)->double_at_put(index, value->d); 299 break; 300 case T_BYTE: 301 typeArrayOop(a)->byte_at_put(index, value->b); 302 break; 303 case T_SHORT: 304 typeArrayOop(a)->short_at_put(index, value->s); 305 break; 306 case T_INT: 307 typeArrayOop(a)->int_at_put(index, value->i); 308 break; 309 case T_LONG: 310 typeArrayOop(a)->long_at_put(index, value->j); 311 break; 312 default: 313 THROW(vmSymbols::java_lang_IllegalArgumentException()); 314 } 315 } 316 } 317 318 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 319 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 320 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 321 if (type == T_VOID) { 322 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 323 } 324 else { 325 return Universe::typeArrayKlassObj(type); 326 } 327 } 328 329 #ifdef ASSERT 330 static oop basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 331 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 332 return Universe::java_mirror(type); 333 } 334 #endif 335 336 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 337 if (element_mirror == NULL) { 338 THROW_0(vmSymbols::java_lang_NullPointerException()); 339 } 340 if (length < 0) { 341 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length)); 342 } 343 if (java_lang_Class::is_primitive(element_mirror)) { 344 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 345 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 346 } else { 347 Klass* k = java_lang_Class::as_Klass(element_mirror); 348 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 349 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 350 } 351 return oopFactory::new_array(k, length, THREAD); 352 } 353 } 354 355 356 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 357 assert(dim_array->is_typeArray(), "just checking"); 358 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 359 360 if (element_mirror == NULL) { 361 THROW_0(vmSymbols::java_lang_NullPointerException()); 362 } 363 364 int len = dim_array->length(); 365 if (len <= 0 || len > MAX_DIM) { 366 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 367 } 368 369 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 370 for (int i = 0; i < len; i++) { 371 int d = dim_array->int_at(i); 372 if (d < 0) { 373 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d)); 374 } 375 dimensions[i] = d; 376 } 377 378 Klass* klass; 379 int dim = len; 380 if (java_lang_Class::is_primitive(element_mirror)) { 381 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 382 } else { 383 klass = java_lang_Class::as_Klass(element_mirror); 384 if (klass->is_array_klass()) { 385 int k_dim = ArrayKlass::cast(klass)->dimension(); 386 if (k_dim + len > MAX_DIM) { 387 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 388 } 389 dim += k_dim; 390 } 391 } 392 klass = klass->array_klass(dim, CHECK_NULL); 393 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 394 assert(obj->is_array(), "just checking"); 395 return arrayOop(obj); 396 } 397 398 399 oop Reflection::array_component_type(oop mirror, TRAPS) { 400 if (java_lang_Class::is_primitive(mirror)) { 401 return NULL; 402 } 403 404 Klass* klass = java_lang_Class::as_Klass(mirror); 405 if (!klass->is_array_klass()) { 406 return NULL; 407 } 408 409 oop result = java_lang_Class::component_mirror(mirror); 410 #ifdef ASSERT 411 oop result2 = NULL; 412 if (ArrayKlass::cast(klass)->dimension() == 1) { 413 if (klass->is_typeArray_klass()) { 414 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 415 } else { 416 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 417 } 418 } else { 419 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 420 assert(lower_dim->is_array_klass(), "just checking"); 421 result2 = lower_dim->java_mirror(); 422 } 423 assert(oopDesc::equals(result, result2), "results must be consistent"); 424 #endif //ASSERT 425 return result; 426 } 427 428 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) { 429 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 430 for (;;) { 431 const InstanceKlass* hc = ik->unsafe_anonymous_host(); 432 if (hc == NULL) return false; 433 if (hc == unsafe_anonymous_host) return true; 434 ik = hc; 435 436 // There's no way to make a host class loop short of patching memory. 437 // Therefore there cannot be a loop here unless there's another bug. 438 // Still, let's check for it. 439 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop"); 440 } 441 } 442 443 static bool can_relax_access_check_for(const Klass* accessor, 444 const Klass* accessee, 445 bool classloader_only) { 446 447 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 448 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 449 450 // If either is on the other's unsafe_anonymous_host chain, access is OK, 451 // because one is inside the other. 452 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) || 453 under_unsafe_anonymous_host(accessee_ik, accessor_ik)) 454 return true; 455 456 if ((RelaxAccessControlCheck && 457 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 458 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 459 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 460 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { 461 return classloader_only && 462 Verifier::relax_access_for(accessor_ik->class_loader()) && 463 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 464 accessor_ik->class_loader() == accessee_ik->class_loader(); 465 } 466 467 return false; 468 } 469 470 /* 471 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if: 472 473 Callee T in Callee T in package PT, 474 unnamed module runtime module MT 475 ------------------------------------------------------------------------------------------------ 476 477 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES 478 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES 479 unnamed module: YES 480 Else if (MS can read MT (establish readability) && 481 ((MT exports PT to MS or to all modules) || 482 (MT is open))): YES 483 484 ------------------------------------------------------------------------------------------------ 485 Caller S in unnamed YES Readability exists because unnamed module 486 module UM "reads" all modules 487 if (MT exports PT to UM or to all modules): YES 488 489 ------------------------------------------------------------------------------------------------ 490 491 Note: a loose module is a module that can read all current and future unnamed modules. 492 */ 493 Reflection::VerifyClassAccessResults Reflection::verify_class_access( 494 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) { 495 496 // Verify that current_class can access new_class. If the classloader_only 497 // flag is set, we automatically allow any accesses in which current_class 498 // doesn't have a classloader. 499 if ((current_class == NULL) || 500 (current_class == new_class) || 501 is_same_class_package(current_class, new_class)) { 502 return ACCESS_OK; 503 } 504 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 505 // succeed trivially. 506 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 507 return ACCESS_OK; 508 } 509 510 // module boundaries 511 if (new_class->is_public()) { 512 // Ignore modules for DumpSharedSpaces because we do not have any package 513 // or module information for modules other than java.base. 514 if (DumpSharedSpaces) { 515 return ACCESS_OK; 516 } 517 518 // Find the module entry for current_class, the accessor 519 ModuleEntry* module_from = current_class->module(); 520 // Find the module entry for new_class, the accessee 521 ModuleEntry* module_to = new_class->module(); 522 523 // both in same (possibly unnamed) module 524 if (module_from == module_to) { 525 return ACCESS_OK; 526 } 527 528 // Acceptable access to a type in an unnamed module. Note that since 529 // unnamed modules can read all unnamed modules, this also handles the 530 // case where module_from is also unnamed but in a different class loader. 531 if (!module_to->is_named() && 532 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) { 533 return ACCESS_OK; 534 } 535 536 // Establish readability, check if module_from is allowed to read module_to. 537 if (!module_from->can_read(module_to)) { 538 return MODULE_NOT_READABLE; 539 } 540 541 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported 542 if (module_to->is_open()) { 543 return ACCESS_OK; 544 } 545 546 PackageEntry* package_to = new_class->package(); 547 assert(package_to != NULL, "can not obtain new_class' package"); 548 549 { 550 MutexLocker m1(Module_lock); 551 552 // Once readability is established, if module_to exports T unqualifiedly, 553 // (to all modules), than whether module_from is in the unnamed module 554 // or not does not matter, access is allowed. 555 if (package_to->is_unqual_exported()) { 556 return ACCESS_OK; 557 } 558 559 // Access is allowed if both 1 & 2 hold: 560 // 1. Readability, module_from can read module_to (established above). 561 // 2. Either module_to exports T to module_from qualifiedly. 562 // or 563 // module_to exports T to all unnamed modules and module_from is unnamed. 564 // or 565 // module_to exports T unqualifiedly to all modules (checked above). 566 if (!package_to->is_qexported_to(module_from)) { 567 return TYPE_NOT_EXPORTED; 568 } 569 } 570 return ACCESS_OK; 571 } 572 573 if (can_relax_access_check_for(current_class, new_class, classloader_only)) { 574 return ACCESS_OK; 575 } 576 return OTHER_PROBLEM; 577 } 578 579 // Return an error message specific to the specified Klass*'s and result. 580 // This function must be called from within a block containing a ResourceMark. 581 char* Reflection::verify_class_access_msg(const Klass* current_class, 582 const InstanceKlass* new_class, 583 const VerifyClassAccessResults result) { 584 assert(result != ACCESS_OK, "must be failure result"); 585 char * msg = NULL; 586 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) { 587 // Find the module entry for current_class, the accessor 588 ModuleEntry* module_from = current_class->module(); 589 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE; 590 const char * current_class_name = current_class->external_name(); 591 592 // Find the module entry for new_class, the accessee 593 ModuleEntry* module_to = NULL; 594 module_to = new_class->module(); 595 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE; 596 const char * new_class_name = new_class->external_name(); 597 598 if (result == MODULE_NOT_READABLE) { 599 assert(module_from->is_named(), "Unnamed modules can read all modules"); 600 if (module_to->is_named()) { 601 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) + 602 strlen(new_class_name) + 2*strlen(module_to_name); 603 msg = NEW_RESOURCE_ARRAY(char, len); 604 jio_snprintf(msg, len - 1, 605 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s", 606 current_class_name, module_from_name, new_class_name, 607 module_to_name, module_from_name, module_to_name); 608 } else { 609 oop jlm = module_to->module(); 610 assert(jlm != NULL, "Null jlm in module_to ModuleEntry"); 611 intptr_t identity_hash = jlm->identity_hash(); 612 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) + 613 strlen(new_class_name) + 2*sizeof(uintx); 614 msg = NEW_RESOURCE_ARRAY(char, len); 615 jio_snprintf(msg, len - 1, 616 "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, 617 current_class_name, module_from_name, new_class_name, uintx(identity_hash), 618 module_from_name, uintx(identity_hash)); 619 } 620 621 } else if (result == TYPE_NOT_EXPORTED) { 622 assert(new_class->package() != NULL, 623 "Unnamed packages are always exported"); 624 const char * package_name = 625 new_class->package()->name()->as_klass_external_name(); 626 assert(module_to->is_named(), "Unnamed modules export all packages"); 627 if (module_from->is_named()) { 628 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) + 629 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name); 630 msg = NEW_RESOURCE_ARRAY(char, len); 631 jio_snprintf(msg, len - 1, 632 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s", 633 current_class_name, module_from_name, new_class_name, 634 module_to_name, module_to_name, package_name, module_from_name); 635 } else { 636 oop jlm = module_from->module(); 637 assert(jlm != NULL, "Null jlm in module_from ModuleEntry"); 638 intptr_t identity_hash = jlm->identity_hash(); 639 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) + 640 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx); 641 msg = NEW_RESOURCE_ARRAY(char, len); 642 jio_snprintf(msg, len - 1, 643 "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, 644 current_class_name, uintx(identity_hash), new_class_name, module_to_name, 645 module_to_name, package_name, uintx(identity_hash)); 646 } 647 } else { 648 ShouldNotReachHere(); 649 } 650 } // result != OTHER_PROBLEM... 651 return msg; 652 } 653 654 bool Reflection::verify_member_access(const Klass* current_class, 655 const Klass* resolved_class, 656 const Klass* member_class, 657 AccessFlags access, 658 bool classloader_only, 659 bool protected_restriction, 660 TRAPS) { 661 // Verify that current_class can access a member of member_class, where that 662 // field's access bits are "access". We assume that we've already verified 663 // that current_class can access member_class. 664 // 665 // If the classloader_only flag is set, we automatically allow any accesses 666 // in which current_class doesn't have a classloader. 667 // 668 // "resolved_class" is the runtime type of "member_class". Sometimes we don't 669 // need this distinction (e.g. if all we have is the runtime type, or during 670 // class file parsing when we only care about the static type); in that case 671 // callers should ensure that resolved_class == member_class. 672 // 673 if ((current_class == NULL) || 674 (current_class == member_class) || 675 access.is_public()) { 676 return true; 677 } 678 679 const Klass* host_class = current_class; 680 if (current_class->is_instance_klass() && 681 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) { 682 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host(); 683 assert(host_class != NULL, "Unsafe anonymous class has null host class"); 684 assert(!(host_class->is_instance_klass() && 685 InstanceKlass::cast(host_class)->is_unsafe_anonymous()), 686 "unsafe_anonymous_host should not be unsafe anonymous itself"); 687 } 688 if (host_class == member_class) { 689 return true; 690 } 691 692 if (access.is_protected()) { 693 if (!protected_restriction) { 694 // See if current_class (or outermost host class) is a subclass of member_class 695 // An interface may not access protected members of j.l.Object 696 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) { 697 if (access.is_static() || // static fields are ok, see 6622385 698 current_class == resolved_class || 699 member_class == resolved_class || 700 host_class->is_subclass_of(resolved_class) || 701 resolved_class->is_subclass_of(host_class)) { 702 return true; 703 } 704 } 705 } 706 } 707 708 // package access 709 if (!access.is_private() && is_same_class_package(current_class, member_class)) { 710 return true; 711 } 712 713 // private access between different classes needs a nestmate check, but 714 // not for unsafe anonymous classes - so check host_class 715 if (access.is_private() && host_class == current_class) { 716 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) { 717 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class)); 718 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class)); 719 // Nestmate access checks may require resolution and validation of the nest-host. 720 // It is up to the caller to check for pending exceptions and handle appropriately. 721 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false); 722 if (access) { 723 guarantee(resolved_class->is_subclass_of(member_class), "must be!"); 724 return true; 725 } 726 } 727 } 728 729 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to 730 // succeed trivially. 731 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 732 return true; 733 } 734 735 // Check for special relaxations 736 return can_relax_access_check_for(current_class, member_class, classloader_only); 737 } 738 739 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) { 740 return InstanceKlass::cast(class1)->is_same_class_package(class2); 741 } 742 743 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 744 // throw an incompatible class change exception 745 // If inner_is_member, require the inner to be a member of the outer. 746 // If !inner_is_member, require the inner to be unsafe anonymous (a non-member). 747 // Caller is responsible for figuring out in advance which case must be true. 748 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner, 749 bool inner_is_member, TRAPS) { 750 InnerClassesIterator iter(outer); 751 constantPoolHandle cp (THREAD, outer->constants()); 752 for (; !iter.done(); iter.next()) { 753 int ioff = iter.inner_class_info_index(); 754 int ooff = iter.outer_class_info_index(); 755 756 if (inner_is_member && ioff != 0 && ooff != 0) { 757 Klass* o = cp->klass_at(ooff, CHECK); 758 if (o == outer) { 759 Klass* i = cp->klass_at(ioff, CHECK); 760 if (i == inner) { 761 return; 762 } 763 } 764 } 765 if (!inner_is_member && ioff != 0 && ooff == 0 && 766 cp->klass_name_at_matches(inner, ioff)) { 767 Klass* i = cp->klass_at(ioff, CHECK); 768 if (i == inner) { 769 return; 770 } 771 } 772 } 773 774 // 'inner' not declared as an inner klass in outer 775 ResourceMark rm(THREAD); 776 Exceptions::fthrow( 777 THREAD_AND_LOCATION, 778 vmSymbols::java_lang_IncompatibleClassChangeError(), 779 "%s and %s disagree on InnerClasses attribute", 780 outer->external_name(), 781 inner->external_name() 782 ); 783 } 784 785 // Utility method converting a single SignatureStream element into java.lang.Class instance 786 static oop get_mirror_from_signature(const methodHandle& method, 787 SignatureStream* ss, 788 TRAPS) { 789 790 791 if (T_OBJECT == ss->type() || T_ARRAY == ss->type() || T_VALUETYPE == ss->type()) { 792 Symbol* name = ss->as_symbol(CHECK_NULL); 793 oop loader = method->method_holder()->class_loader(); 794 oop protection_domain = method->method_holder()->protection_domain(); 795 const Klass* k = SystemDictionary::resolve_or_fail(name, 796 Handle(THREAD, loader), 797 Handle(THREAD, protection_domain), 798 true, 799 CHECK_NULL); 800 if (log_is_enabled(Debug, class, resolve)) { 801 trace_class_resolution(k); 802 } 803 return k->java_mirror(); 804 } 805 806 assert(ss->type() != T_VOID || ss->at_return_type(), 807 "T_VOID should only appear as return type"); 808 809 return java_lang_Class::primitive_mirror(ss->type()); 810 } 811 812 static objArrayHandle get_parameter_types(const methodHandle& method, 813 int parameter_count, 814 oop* return_type, 815 TRAPS) { 816 // Allocate array holding parameter types (java.lang.Class instances) 817 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 818 objArrayHandle mirrors(THREAD, m); 819 int index = 0; 820 // Collect parameter types 821 ResourceMark rm(THREAD); 822 Symbol* signature = method->signature(); 823 SignatureStream ss(signature); 824 while (!ss.at_return_type()) { 825 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 826 mirrors->obj_at_put(index++, mirror); 827 ss.next(); 828 } 829 assert(index == parameter_count, "invalid parameter count"); 830 if (return_type != NULL) { 831 // Collect return type as well 832 assert(ss.at_return_type(), "return type should be present"); 833 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 834 } 835 return mirrors; 836 } 837 838 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) { 839 return method->resolved_checked_exceptions(THREAD); 840 } 841 842 static Handle new_type(Symbol* signature, Klass* k, TRAPS) { 843 // Basic types 844 BasicType type = vmSymbols::signature_type(signature); 845 if (type != T_OBJECT && type != T_VALUETYPE) { 846 return Handle(THREAD, Universe::java_mirror(type)); 847 } 848 849 Klass* result = 850 SystemDictionary::resolve_or_fail(signature, 851 Handle(THREAD, k->class_loader()), 852 Handle(THREAD, k->protection_domain()), 853 true, CHECK_(Handle())); 854 855 if (log_is_enabled(Debug, class, resolve)) { 856 trace_class_resolution(result); 857 } 858 859 oop nt = result->java_mirror(); 860 return Handle(THREAD, nt); 861 } 862 863 864 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) { 865 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 866 assert(!method()->is_initializer() || 867 (for_constant_pool_access && method()->is_static()), 868 "should call new_constructor instead"); 869 InstanceKlass* holder = method->method_holder(); 870 int slot = method->method_idnum(); 871 872 Symbol* signature = method->signature(); 873 int parameter_count = ArgumentCount(signature).size(); 874 oop return_type_oop = NULL; 875 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 876 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 877 878 Handle return_type(THREAD, return_type_oop); 879 880 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 881 882 if (exception_types.is_null()) return NULL; 883 884 Symbol* method_name = method->name(); 885 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 886 Handle name = Handle(THREAD, name_oop); 887 if (name == NULL) return NULL; 888 889 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 890 891 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 892 893 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 894 java_lang_reflect_Method::set_slot(mh(), slot); 895 java_lang_reflect_Method::set_name(mh(), name()); 896 java_lang_reflect_Method::set_return_type(mh(), return_type()); 897 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 898 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 899 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 900 java_lang_reflect_Method::set_override(mh(), false); 901 if (java_lang_reflect_Method::has_signature_field() && 902 method->generic_signature() != NULL) { 903 Symbol* gs = method->generic_signature(); 904 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 905 java_lang_reflect_Method::set_signature(mh(), sig()); 906 } 907 if (java_lang_reflect_Method::has_annotations_field()) { 908 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 909 java_lang_reflect_Method::set_annotations(mh(), an_oop); 910 } 911 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 912 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 913 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 914 } 915 if (java_lang_reflect_Method::has_annotation_default_field()) { 916 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 917 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 918 } 919 if (java_lang_reflect_Method::has_type_annotations_field()) { 920 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 921 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 922 } 923 return mh(); 924 } 925 926 927 oop Reflection::new_constructor(const methodHandle& method, TRAPS) { 928 assert(method()->is_initializer(), "should call new_method instead"); 929 930 InstanceKlass* holder = method->method_holder(); 931 int slot = method->method_idnum(); 932 933 Symbol* signature = method->signature(); 934 int parameter_count = ArgumentCount(signature).size(); 935 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 936 if (parameter_types.is_null()) return NULL; 937 938 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 939 if (exception_types.is_null()) return NULL; 940 941 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 942 943 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 944 945 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 946 java_lang_reflect_Constructor::set_slot(ch(), slot); 947 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 948 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 949 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 950 java_lang_reflect_Constructor::set_override(ch(), false); 951 if (java_lang_reflect_Constructor::has_signature_field() && 952 method->generic_signature() != NULL) { 953 Symbol* gs = method->generic_signature(); 954 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 955 java_lang_reflect_Constructor::set_signature(ch(), sig()); 956 } 957 if (java_lang_reflect_Constructor::has_annotations_field()) { 958 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 959 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 960 } 961 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 962 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 963 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 964 } 965 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 966 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 967 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 968 } 969 return ch(); 970 } 971 972 973 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 974 Symbol* field_name = fd->name(); 975 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 976 Handle name = Handle(THREAD, name_oop); 977 Symbol* signature = fd->signature(); 978 InstanceKlass* holder = fd->field_holder(); 979 Handle type = new_type(signature, holder, CHECK_NULL); 980 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 981 982 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 983 java_lang_reflect_Field::set_slot(rh(), fd->index()); 984 java_lang_reflect_Field::set_name(rh(), name()); 985 java_lang_reflect_Field::set_type(rh(), type()); 986 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 987 int modifiers = fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS; 988 if (fd->is_flattenable()) { 989 modifiers |= JVM_ACC_FLATTENABLE; 990 } 991 if (fd->is_flattened()) { 992 modifiers |= JVM_ACC_FIELD_FLATTENED; 993 } 994 java_lang_reflect_Field::set_modifiers(rh(), modifiers); 995 java_lang_reflect_Field::set_override(rh(), false); 996 if (java_lang_reflect_Field::has_signature_field() && 997 fd->has_generic_signature()) { 998 Symbol* gs = fd->generic_signature(); 999 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 1000 java_lang_reflect_Field::set_signature(rh(), sig()); 1001 } 1002 if (java_lang_reflect_Field::has_annotations_field()) { 1003 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 1004 java_lang_reflect_Field::set_annotations(rh(), an_oop); 1005 } 1006 if (java_lang_reflect_Field::has_type_annotations_field()) { 1007 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 1008 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 1009 } 1010 return rh(); 1011 } 1012 1013 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 1014 int flags, TRAPS) { 1015 1016 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 1017 1018 if(NULL != sym) { 1019 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1020 java_lang_reflect_Parameter::set_name(rh(), name()); 1021 } else { 1022 java_lang_reflect_Parameter::set_name(rh(), NULL); 1023 } 1024 1025 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 1026 java_lang_reflect_Parameter::set_executable(rh(), method()); 1027 java_lang_reflect_Parameter::set_index(rh(), index); 1028 return rh(); 1029 } 1030 1031 1032 static methodHandle resolve_interface_call(InstanceKlass* klass, 1033 const methodHandle& method, 1034 Klass* recv_klass, 1035 Handle receiver, 1036 TRAPS) { 1037 1038 assert(!method.is_null() , "method should not be null"); 1039 1040 CallInfo info; 1041 Symbol* signature = method->signature(); 1042 Symbol* name = method->name(); 1043 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 1044 LinkInfo(klass, name, signature), 1045 true, 1046 CHECK_(methodHandle())); 1047 return info.selected_method(); 1048 } 1049 1050 // Conversion 1051 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1052 assert(java_lang_Class::is_primitive(basic_type_mirror), 1053 "just checking"); 1054 return java_lang_Class::primitive_type(basic_type_mirror); 1055 } 1056 1057 // Narrowing of basic types. Used to create correct jvalues for 1058 // boolean, byte, char and short return return values from interpreter 1059 // which are returned as ints. Throws IllegalArgumentException. 1060 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1061 switch (narrow_type) { 1062 case T_BOOLEAN: 1063 value->z = (jboolean) (value->i & 1); 1064 return; 1065 case T_BYTE: 1066 value->b = (jbyte)value->i; 1067 return; 1068 case T_CHAR: 1069 value->c = (jchar)value->i; 1070 return; 1071 case T_SHORT: 1072 value->s = (jshort)value->i; 1073 return; 1074 default: 1075 break; // fail 1076 } 1077 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1078 } 1079 1080 1081 // Method call (shared by invoke_method and invoke_constructor) 1082 static oop invoke(InstanceKlass* klass, 1083 const methodHandle& reflected_method, 1084 Handle receiver, 1085 bool override, 1086 objArrayHandle ptypes, 1087 BasicType rtype, 1088 objArrayHandle args, 1089 bool is_method_invoke, 1090 TRAPS) { 1091 1092 ResourceMark rm(THREAD); 1093 1094 methodHandle method; // actual method to invoke 1095 Klass* target_klass; // target klass, receiver's klass for non-static 1096 1097 // Ensure klass is initialized 1098 klass->initialize(CHECK_NULL); 1099 1100 bool is_static = reflected_method->is_static(); 1101 if (is_static) { 1102 // ignore receiver argument 1103 method = reflected_method; 1104 target_klass = klass; 1105 } else { 1106 // check for null receiver 1107 if (receiver.is_null()) { 1108 THROW_0(vmSymbols::java_lang_NullPointerException()); 1109 } 1110 // Check class of receiver against class declaring method 1111 if (!receiver->is_a(klass)) { 1112 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 1113 } 1114 // target klass is receiver's klass 1115 target_klass = receiver->klass(); 1116 // no need to resolve if method is private or <init> 1117 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 1118 method = reflected_method; 1119 } else { 1120 // resolve based on the receiver 1121 if (reflected_method->method_holder()->is_interface()) { 1122 // resolve interface call 1123 // 1124 // Match resolution errors with those thrown due to reflection inlining 1125 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 1126 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 1127 if (HAS_PENDING_EXCEPTION) { 1128 // Method resolution threw an exception; wrap it in an InvocationTargetException 1129 oop resolution_exception = PENDING_EXCEPTION; 1130 CLEAR_PENDING_EXCEPTION; 1131 // JVMTI has already reported the pending exception 1132 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1133 if (THREAD->is_Java_thread()) { 1134 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1135 } 1136 JavaCallArguments args(Handle(THREAD, resolution_exception)); 1137 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1138 vmSymbols::throwable_void_signature(), 1139 &args); 1140 } 1141 } else { 1142 // if the method can be overridden, we resolve using the vtable index. 1143 assert(!reflected_method->has_itable_index(), ""); 1144 int index = reflected_method->vtable_index(); 1145 method = reflected_method; 1146 if (index != Method::nonvirtual_vtable_index) { 1147 method = methodHandle(THREAD, target_klass->method_at_vtable(index)); 1148 } 1149 if (!method.is_null()) { 1150 // Check for abstract methods as well 1151 if (method->is_abstract()) { 1152 // new default: 6531596 1153 ResourceMark rm(THREAD); 1154 Handle h_origexception = Exceptions::new_exception(THREAD, 1155 vmSymbols::java_lang_AbstractMethodError(), 1156 Method::name_and_sig_as_C_string(target_klass, 1157 method->name(), 1158 method->signature())); 1159 JavaCallArguments args(h_origexception); 1160 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1161 vmSymbols::throwable_void_signature(), 1162 &args); 1163 } 1164 } 1165 } 1166 } 1167 } 1168 1169 // I believe this is a ShouldNotGetHere case which requires 1170 // an internal vtable bug. If you ever get this please let Karen know. 1171 if (method.is_null()) { 1172 ResourceMark rm(THREAD); 1173 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 1174 Method::name_and_sig_as_C_string(klass, 1175 reflected_method->name(), 1176 reflected_method->signature())); 1177 } 1178 1179 assert(ptypes->is_objArray(), "just checking"); 1180 int args_len = args.is_null() ? 0 : args->length(); 1181 // Check number of arguments 1182 if (ptypes->length() != args_len) { 1183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1184 "wrong number of arguments"); 1185 } 1186 1187 // Create object to contain parameters for the JavaCall 1188 JavaCallArguments java_args(method->size_of_parameters()); 1189 1190 if (!is_static) { 1191 java_args.push_oop(receiver); 1192 } 1193 1194 for (int i = 0; i < args_len; i++) { 1195 oop type_mirror = ptypes->obj_at(i); 1196 oop arg = args->obj_at(i); 1197 if (java_lang_Class::is_primitive(type_mirror)) { 1198 jvalue value; 1199 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1200 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL); 1201 if (ptype != atype) { 1202 Reflection::widen(&value, atype, ptype, CHECK_NULL); 1203 } 1204 switch (ptype) { 1205 case T_BOOLEAN: java_args.push_int(value.z); break; 1206 case T_CHAR: java_args.push_int(value.c); break; 1207 case T_BYTE: java_args.push_int(value.b); break; 1208 case T_SHORT: java_args.push_int(value.s); break; 1209 case T_INT: java_args.push_int(value.i); break; 1210 case T_LONG: java_args.push_long(value.j); break; 1211 case T_FLOAT: java_args.push_float(value.f); break; 1212 case T_DOUBLE: java_args.push_double(value.d); break; 1213 default: 1214 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1215 } 1216 } else { 1217 if (arg != NULL) { 1218 Klass* k = java_lang_Class::as_Klass(type_mirror); 1219 if (!arg->is_a(k)) { 1220 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1221 "argument type mismatch"); 1222 } 1223 } 1224 Handle arg_handle(THREAD, arg); // Create handle for argument 1225 java_args.push_oop(arg_handle); // Push handle 1226 } 1227 } 1228 1229 assert(java_args.size_of_parameters() == method->size_of_parameters(), 1230 "just checking"); 1231 1232 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1233 // oop (i.e., NOT as an handle) 1234 JavaValue result(rtype); 1235 JavaCalls::call(&result, method, &java_args, THREAD); 1236 1237 if (HAS_PENDING_EXCEPTION) { 1238 // Method threw an exception; wrap it in an InvocationTargetException 1239 oop target_exception = PENDING_EXCEPTION; 1240 CLEAR_PENDING_EXCEPTION; 1241 // JVMTI has already reported the pending exception 1242 // JVMTI internal flag reset is needed in order to report InvocationTargetException 1243 if (THREAD->is_Java_thread()) { 1244 JvmtiExport::clear_detected_exception((JavaThread*)THREAD); 1245 } 1246 1247 JavaCallArguments args(Handle(THREAD, target_exception)); 1248 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1249 vmSymbols::throwable_void_signature(), 1250 &args); 1251 } else { 1252 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1253 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL); 1254 } 1255 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD); 1256 } 1257 } 1258 1259 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1260 // of java.lang.reflect.Constructor 1261 1262 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1263 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1264 int slot = java_lang_reflect_Method::slot(method_mirror); 1265 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1266 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1267 1268 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1269 BasicType rtype; 1270 if (java_lang_Class::is_primitive(return_type_mirror)) { 1271 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1272 } else { 1273 rtype = T_OBJECT; 1274 } 1275 1276 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1277 Method* m = klass->method_with_idnum(slot); 1278 if (m == NULL) { 1279 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1280 } 1281 methodHandle method(THREAD, m); 1282 1283 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1284 } 1285 1286 1287 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1288 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1289 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1290 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1291 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1292 1293 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror)); 1294 Method* m = klass->method_with_idnum(slot); 1295 if (m == NULL) { 1296 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1297 } 1298 methodHandle method(THREAD, m); 1299 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1300 1301 // Make sure klass gets initialize 1302 klass->initialize(CHECK_NULL); 1303 1304 // Create new instance (the receiver) 1305 klass->check_valid_for_instantiation(false, CHECK_NULL); 1306 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1307 1308 // Ignore result from call and return receiver 1309 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1310 return receiver(); 1311 }