1 /* 2 * Copyright (c) 1997, 2015, 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 "classfile/javaClasses.hpp" 27 #include "classfile/stringTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/verifier.hpp" 30 #include "classfile/vmSymbols.hpp" 31 #include "interpreter/linkResolver.hpp" 32 #include "memory/oopFactory.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/instanceKlass.hpp" 36 #include "oops/objArrayKlass.hpp" 37 #include "oops/objArrayOop.inline.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "prims/jvm.h" 40 #include "prims/jvmtiExport.hpp" 41 #include "runtime/arguments.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/javaCalls.hpp" 44 #include "runtime/reflection.hpp" 45 #include "runtime/reflectionUtils.hpp" 46 #include "runtime/signature.hpp" 47 #include "runtime/vframe.hpp" 48 49 static void trace_class_resolution(Klass* to_class) { 50 ResourceMark rm; 51 int line_number = -1; 52 const char * source_file = NULL; 53 Klass* caller = NULL; 54 JavaThread* jthread = JavaThread::current(); 55 if (jthread->has_last_Java_frame()) { 56 vframeStream vfst(jthread); 57 // skip over any frames belonging to java.lang.Class 58 while (!vfst.at_end() && 59 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 60 vfst.next(); 61 } 62 if (!vfst.at_end()) { 63 // this frame is a likely suspect 64 caller = vfst.method()->method_holder(); 65 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 66 Symbol* s = vfst.method()->method_holder()->source_file_name(); 67 if (s != NULL) { 68 source_file = s->as_C_string(); 69 } 70 } 71 } 72 if (caller != NULL) { 73 const char * from = caller->external_name(); 74 const char * to = to_class->external_name(); 75 // print in a single call to reduce interleaving between threads 76 if (source_file != NULL) { 77 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); 78 } else { 79 tty->print("RESOLVE %s %s (reflection)\n", from, to); 80 } 81 } 82 } 83 84 85 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 86 if (type == T_VOID) { 87 return NULL; 88 } 89 if (type == T_OBJECT || type == T_ARRAY) { 90 // regular objects are not boxed 91 return (oop) value->l; 92 } 93 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 94 if (result == NULL) { 95 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 96 } 97 return result; 98 } 99 100 101 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 102 if (box == NULL) { 103 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 104 } 105 return java_lang_boxing_object::get_value(box, value); 106 } 107 108 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 109 // Note: box is really the unboxed oop. It might even be a Short, etc.! 110 value->l = (jobject) box; 111 return T_OBJECT; 112 } 113 114 115 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 116 assert(wide_type != current_type, "widen should not be called with identical types"); 117 switch (wide_type) { 118 case T_BOOLEAN: 119 case T_BYTE: 120 case T_CHAR: 121 break; // fail 122 case T_SHORT: 123 switch (current_type) { 124 case T_BYTE: 125 value->s = (jshort) value->b; 126 return; 127 } 128 break; // fail 129 case T_INT: 130 switch (current_type) { 131 case T_BYTE: 132 value->i = (jint) value->b; 133 return; 134 case T_CHAR: 135 value->i = (jint) value->c; 136 return; 137 case T_SHORT: 138 value->i = (jint) value->s; 139 return; 140 } 141 break; // fail 142 case T_LONG: 143 switch (current_type) { 144 case T_BYTE: 145 value->j = (jlong) value->b; 146 return; 147 case T_CHAR: 148 value->j = (jlong) value->c; 149 return; 150 case T_SHORT: 151 value->j = (jlong) value->s; 152 return; 153 case T_INT: 154 value->j = (jlong) value->i; 155 return; 156 } 157 break; // fail 158 case T_FLOAT: 159 switch (current_type) { 160 case T_BYTE: 161 value->f = (jfloat) value->b; 162 return; 163 case T_CHAR: 164 value->f = (jfloat) value->c; 165 return; 166 case T_SHORT: 167 value->f = (jfloat) value->s; 168 return; 169 case T_INT: 170 value->f = (jfloat) value->i; 171 return; 172 case T_LONG: 173 value->f = (jfloat) value->j; 174 return; 175 } 176 break; // fail 177 case T_DOUBLE: 178 switch (current_type) { 179 case T_BYTE: 180 value->d = (jdouble) value->b; 181 return; 182 case T_CHAR: 183 value->d = (jdouble) value->c; 184 return; 185 case T_SHORT: 186 value->d = (jdouble) value->s; 187 return; 188 case T_INT: 189 value->d = (jdouble) value->i; 190 return; 191 case T_FLOAT: 192 value->d = (jdouble) value->f; 193 return; 194 case T_LONG: 195 value->d = (jdouble) value->j; 196 return; 197 } 198 break; // fail 199 default: 200 break; // fail 201 } 202 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 203 } 204 205 206 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 207 if (!a->is_within_bounds(index)) { 208 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 209 } 210 if (a->is_objArray()) { 211 value->l = (jobject) objArrayOop(a)->obj_at(index); 212 return T_OBJECT; 213 } else { 214 assert(a->is_typeArray(), "just checking"); 215 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 216 switch (type) { 217 case T_BOOLEAN: 218 value->z = typeArrayOop(a)->bool_at(index); 219 break; 220 case T_CHAR: 221 value->c = typeArrayOop(a)->char_at(index); 222 break; 223 case T_FLOAT: 224 value->f = typeArrayOop(a)->float_at(index); 225 break; 226 case T_DOUBLE: 227 value->d = typeArrayOop(a)->double_at(index); 228 break; 229 case T_BYTE: 230 value->b = typeArrayOop(a)->byte_at(index); 231 break; 232 case T_SHORT: 233 value->s = typeArrayOop(a)->short_at(index); 234 break; 235 case T_INT: 236 value->i = typeArrayOop(a)->int_at(index); 237 break; 238 case T_LONG: 239 value->j = typeArrayOop(a)->long_at(index); 240 break; 241 default: 242 return T_ILLEGAL; 243 } 244 return type; 245 } 246 } 247 248 249 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 250 if (!a->is_within_bounds(index)) { 251 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 252 } 253 if (a->is_objArray()) { 254 if (value_type == T_OBJECT) { 255 oop obj = (oop) value->l; 256 if (obj != NULL) { 257 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 258 if (!obj->is_a(element_klass)) { 259 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 260 } 261 } 262 objArrayOop(a)->obj_at_put(index, obj); 263 } 264 } else { 265 assert(a->is_typeArray(), "just checking"); 266 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 267 if (array_type != value_type) { 268 // The widen operation can potentially throw an exception, but cannot block, 269 // so typeArrayOop a is safe if the call succeeds. 270 widen(value, value_type, array_type, CHECK); 271 } 272 switch (array_type) { 273 case T_BOOLEAN: 274 typeArrayOop(a)->bool_at_put(index, value->z); 275 break; 276 case T_CHAR: 277 typeArrayOop(a)->char_at_put(index, value->c); 278 break; 279 case T_FLOAT: 280 typeArrayOop(a)->float_at_put(index, value->f); 281 break; 282 case T_DOUBLE: 283 typeArrayOop(a)->double_at_put(index, value->d); 284 break; 285 case T_BYTE: 286 typeArrayOop(a)->byte_at_put(index, value->b); 287 break; 288 case T_SHORT: 289 typeArrayOop(a)->short_at_put(index, value->s); 290 break; 291 case T_INT: 292 typeArrayOop(a)->int_at_put(index, value->i); 293 break; 294 case T_LONG: 295 typeArrayOop(a)->long_at_put(index, value->j); 296 break; 297 default: 298 THROW(vmSymbols::java_lang_IllegalArgumentException()); 299 } 300 } 301 } 302 303 304 Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 305 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 306 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 307 if (type == T_VOID) { 308 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 309 } else { 310 return Universe::typeArrayKlassObj(type); 311 } 312 } 313 314 315 oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 316 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 317 return Universe::java_mirror(type); 318 } 319 320 321 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 322 if (element_mirror == NULL) { 323 THROW_0(vmSymbols::java_lang_NullPointerException()); 324 } 325 if (length < 0) { 326 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 327 } 328 if (java_lang_Class::is_primitive(element_mirror)) { 329 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 330 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 331 } else { 332 Klass* k = java_lang_Class::as_Klass(element_mirror); 333 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 334 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 335 } 336 return oopFactory::new_objArray(k, length, THREAD); 337 } 338 } 339 340 341 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 342 assert(dim_array->is_typeArray(), "just checking"); 343 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 344 345 if (element_mirror == NULL) { 346 THROW_0(vmSymbols::java_lang_NullPointerException()); 347 } 348 349 int len = dim_array->length(); 350 if (len <= 0 || len > MAX_DIM) { 351 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 352 } 353 354 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 355 for (int i = 0; i < len; i++) { 356 int d = dim_array->int_at(i); 357 if (d < 0) { 358 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 359 } 360 dimensions[i] = d; 361 } 362 363 Klass* klass; 364 int dim = len; 365 if (java_lang_Class::is_primitive(element_mirror)) { 366 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 367 } else { 368 klass = java_lang_Class::as_Klass(element_mirror); 369 if (klass->oop_is_array()) { 370 int k_dim = ArrayKlass::cast(klass)->dimension(); 371 if (k_dim + len > MAX_DIM) { 372 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 373 } 374 dim += k_dim; 375 } 376 } 377 klass = klass->array_klass(dim, CHECK_NULL); 378 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 379 assert(obj->is_array(), "just checking"); 380 return arrayOop(obj); 381 } 382 383 384 oop Reflection::array_component_type(oop mirror, TRAPS) { 385 if (java_lang_Class::is_primitive(mirror)) { 386 return NULL; 387 } 388 389 Klass* klass = java_lang_Class::as_Klass(mirror); 390 if (!klass->oop_is_array()) { 391 return NULL; 392 } 393 394 oop result = java_lang_Class::component_mirror(mirror); 395 #ifdef ASSERT 396 oop result2 = NULL; 397 if (ArrayKlass::cast(klass)->dimension() == 1) { 398 if (klass->oop_is_typeArray()) { 399 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 400 } else { 401 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 402 } 403 } else { 404 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 405 assert(lower_dim->oop_is_array(), "just checking"); 406 result2 = lower_dim->java_mirror(); 407 } 408 assert(result == result2, "results must be consistent"); 409 #endif //ASSERT 410 return result; 411 } 412 413 414 bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) { 415 // Verify that current_class can access new_class. If the classloader_only 416 // flag is set, we automatically allow any accesses in which current_class 417 // doesn't have a classloader. 418 if ((current_class == NULL) || 419 (current_class == new_class) || 420 (new_class->is_public()) || 421 is_same_class_package(current_class, new_class)) { 422 return true; 423 } 424 // Allow all accesses from sun/reflect/MagicAccessorImpl subclasses to 425 // succeed trivially. 426 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 427 return true; 428 } 429 430 return can_relax_access_check_for(current_class, new_class, classloader_only); 431 } 432 433 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) { 434 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 435 for (;;) { 436 Klass* hc = (Klass*) ik->host_klass(); 437 if (hc == NULL) return false; 438 if (hc == host_klass) return true; 439 ik = InstanceKlass::cast(hc); 440 441 // There's no way to make a host class loop short of patching memory. 442 // Therefore there cannot be a loop here unless there's another bug. 443 // Still, let's check for it. 444 assert(--inf_loop_check > 0, "no host_klass loop"); 445 } 446 } 447 448 bool Reflection::can_relax_access_check_for( 449 Klass* accessor, Klass* accessee, bool classloader_only) { 450 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 451 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 452 453 // If either is on the other's host_klass chain, access is OK, 454 // because one is inside the other. 455 if (under_host_klass(accessor_ik, accessee) || 456 under_host_klass(accessee_ik, accessor)) 457 return true; 458 459 if ((RelaxAccessControlCheck && 460 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 461 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 462 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 463 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { 464 return classloader_only && 465 Verifier::relax_verify_for(accessor_ik->class_loader()) && 466 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 467 accessor_ik->class_loader() == accessee_ik->class_loader(); 468 } else { 469 return false; 470 } 471 } 472 473 bool Reflection::verify_field_access(Klass* current_class, 474 Klass* resolved_class, 475 Klass* field_class, 476 AccessFlags access, 477 bool classloader_only, 478 bool protected_restriction) { 479 // Verify that current_class can access a field of field_class, where that 480 // field's access bits are "access". We assume that we've already verified 481 // that current_class can access field_class. 482 // 483 // If the classloader_only flag is set, we automatically allow any accesses 484 // in which current_class doesn't have a classloader. 485 // 486 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 487 // need this distinction (e.g. if all we have is the runtime type, or during 488 // class file parsing when we only care about the static type); in that case 489 // callers should ensure that resolved_class == field_class. 490 // 491 if ((current_class == NULL) || 492 (current_class == field_class) || 493 access.is_public()) { 494 return true; 495 } 496 497 Klass* host_class = current_class; 498 while (host_class->oop_is_instance() && 499 InstanceKlass::cast(host_class)->is_anonymous()) { 500 Klass* next_host_class = InstanceKlass::cast(host_class)->host_klass(); 501 if (next_host_class == NULL) break; 502 host_class = next_host_class; 503 } 504 if (host_class == field_class) { 505 return true; 506 } 507 508 if (access.is_protected()) { 509 if (!protected_restriction) { 510 // See if current_class (or outermost host class) is a subclass of field_class 511 // An interface may not access protected members of j.l.Object 512 if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) { 513 if (access.is_static() || // static fields are ok, see 6622385 514 current_class == resolved_class || 515 field_class == resolved_class || 516 host_class->is_subclass_of(resolved_class) || 517 resolved_class->is_subclass_of(host_class)) { 518 return true; 519 } 520 } 521 } 522 } 523 524 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 525 return true; 526 } 527 528 // Allow all accesses from sun/reflect/MagicAccessorImpl subclasses to 529 // succeed trivially. 530 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 531 return true; 532 } 533 534 return can_relax_access_check_for( 535 current_class, field_class, classloader_only); 536 } 537 538 539 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) { 540 return InstanceKlass::cast(class1)->is_same_class_package(class2); 541 } 542 543 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) { 544 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD); 545 } 546 547 548 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 549 // throw an incompatible class change exception 550 // If inner_is_member, require the inner to be a member of the outer. 551 // If !inner_is_member, require the inner to be anonymous (a non-member). 552 // Caller is responsible for figuring out in advance which case must be true. 553 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 554 bool inner_is_member, TRAPS) { 555 InnerClassesIterator iter(outer); 556 constantPoolHandle cp (THREAD, outer->constants()); 557 for (; !iter.done(); iter.next()) { 558 int ioff = iter.inner_class_info_index(); 559 int ooff = iter.outer_class_info_index(); 560 561 if (inner_is_member && ioff != 0 && ooff != 0) { 562 Klass* o = cp->klass_at(ooff, CHECK); 563 if (o == outer()) { 564 Klass* i = cp->klass_at(ioff, CHECK); 565 if (i == inner()) { 566 return; 567 } 568 } 569 } 570 if (!inner_is_member && ioff != 0 && ooff == 0 && 571 cp->klass_name_at_matches(inner, ioff)) { 572 Klass* i = cp->klass_at(ioff, CHECK); 573 if (i == inner()) { 574 return; 575 } 576 } 577 } 578 579 // 'inner' not declared as an inner klass in outer 580 ResourceMark rm(THREAD); 581 Exceptions::fthrow( 582 THREAD_AND_LOCATION, 583 vmSymbols::java_lang_IncompatibleClassChangeError(), 584 "%s and %s disagree on InnerClasses attribute", 585 outer->external_name(), 586 inner->external_name() 587 ); 588 } 589 590 // Utility method converting a single SignatureStream element into java.lang.Class instance 591 592 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 593 switch (ss->type()) { 594 default: 595 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 596 return java_lang_Class::primitive_mirror(ss->type()); 597 case T_OBJECT: 598 case T_ARRAY: 599 Symbol* name = ss->as_symbol(CHECK_NULL); 600 oop loader = method->method_holder()->class_loader(); 601 oop protection_domain = method->method_holder()->protection_domain(); 602 Klass* k = SystemDictionary::resolve_or_fail( 603 name, 604 Handle(THREAD, loader), 605 Handle(THREAD, protection_domain), 606 true, CHECK_NULL); 607 if (TraceClassResolution) { 608 trace_class_resolution(k); 609 } 610 return k->java_mirror(); 611 }; 612 } 613 614 615 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 616 // Allocate array holding parameter types (java.lang.Class instances) 617 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 618 objArrayHandle mirrors (THREAD, m); 619 int index = 0; 620 // Collect parameter types 621 ResourceMark rm(THREAD); 622 Symbol* signature = method->signature(); 623 SignatureStream ss(signature); 624 while (!ss.at_return_type()) { 625 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 626 mirrors->obj_at_put(index++, mirror); 627 ss.next(); 628 } 629 assert(index == parameter_count, "invalid parameter count"); 630 if (return_type != NULL) { 631 // Collect return type as well 632 assert(ss.at_return_type(), "return type should be present"); 633 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 634 } 635 return mirrors; 636 } 637 638 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 639 return method->resolved_checked_exceptions(THREAD); 640 } 641 642 643 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) { 644 // Basic types 645 BasicType type = vmSymbols::signature_type(signature); 646 if (type != T_OBJECT) { 647 return Handle(THREAD, Universe::java_mirror(type)); 648 } 649 650 oop loader = InstanceKlass::cast(k())->class_loader(); 651 oop protection_domain = k()->protection_domain(); 652 Klass* result = SystemDictionary::resolve_or_fail(signature, 653 Handle(THREAD, loader), 654 Handle(THREAD, protection_domain), 655 true, CHECK_(Handle())); 656 657 if (TraceClassResolution) { 658 trace_class_resolution(result); 659 } 660 661 oop nt = result->java_mirror(); 662 return Handle(THREAD, nt); 663 } 664 665 666 oop Reflection::new_method(methodHandle method, bool for_constant_pool_access, TRAPS) { 667 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 668 assert(!method()->is_initializer() || 669 (for_constant_pool_access && method()->is_static()), 670 "should call new_constructor instead"); 671 instanceKlassHandle holder (THREAD, method->method_holder()); 672 int slot = method->method_idnum(); 673 674 Symbol* signature = method->signature(); 675 int parameter_count = ArgumentCount(signature).size(); 676 oop return_type_oop = NULL; 677 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 678 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 679 680 Handle return_type(THREAD, return_type_oop); 681 682 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 683 684 if (exception_types.is_null()) return NULL; 685 686 Symbol* method_name = method->name(); 687 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 688 Handle name = Handle(THREAD, name_oop); 689 if (name == NULL) return NULL; 690 691 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 692 693 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 694 695 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 696 java_lang_reflect_Method::set_slot(mh(), slot); 697 java_lang_reflect_Method::set_name(mh(), name()); 698 java_lang_reflect_Method::set_return_type(mh(), return_type()); 699 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 700 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 701 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 702 java_lang_reflect_Method::set_override(mh(), false); 703 if (java_lang_reflect_Method::has_signature_field() && 704 method->generic_signature() != NULL) { 705 Symbol* gs = method->generic_signature(); 706 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 707 java_lang_reflect_Method::set_signature(mh(), sig()); 708 } 709 if (java_lang_reflect_Method::has_annotations_field()) { 710 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 711 java_lang_reflect_Method::set_annotations(mh(), an_oop); 712 } 713 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 714 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 715 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 716 } 717 if (java_lang_reflect_Method::has_annotation_default_field()) { 718 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 719 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 720 } 721 if (java_lang_reflect_Method::has_type_annotations_field()) { 722 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 723 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 724 } 725 return mh(); 726 } 727 728 729 oop Reflection::new_constructor(methodHandle method, TRAPS) { 730 assert(method()->is_initializer(), "should call new_method instead"); 731 732 instanceKlassHandle holder (THREAD, method->method_holder()); 733 int slot = method->method_idnum(); 734 735 Symbol* signature = method->signature(); 736 int parameter_count = ArgumentCount(signature).size(); 737 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 738 if (parameter_types.is_null()) return NULL; 739 740 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 741 if (exception_types.is_null()) return NULL; 742 743 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 744 745 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 746 747 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 748 java_lang_reflect_Constructor::set_slot(ch(), slot); 749 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 750 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 751 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 752 java_lang_reflect_Constructor::set_override(ch(), false); 753 if (java_lang_reflect_Constructor::has_signature_field() && 754 method->generic_signature() != NULL) { 755 Symbol* gs = method->generic_signature(); 756 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 757 java_lang_reflect_Constructor::set_signature(ch(), sig()); 758 } 759 if (java_lang_reflect_Constructor::has_annotations_field()) { 760 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 761 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 762 } 763 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 764 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 765 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 766 } 767 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 768 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 769 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 770 } 771 return ch(); 772 } 773 774 775 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 776 Symbol* field_name = fd->name(); 777 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 778 Handle name = Handle(THREAD, name_oop); 779 Symbol* signature = fd->signature(); 780 instanceKlassHandle holder (THREAD, fd->field_holder()); 781 Handle type = new_type(signature, holder, CHECK_NULL); 782 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 783 784 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 785 java_lang_reflect_Field::set_slot(rh(), fd->index()); 786 java_lang_reflect_Field::set_name(rh(), name()); 787 java_lang_reflect_Field::set_type(rh(), type()); 788 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 789 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 790 java_lang_reflect_Field::set_override(rh(), false); 791 if (java_lang_reflect_Field::has_signature_field() && 792 fd->has_generic_signature()) { 793 Symbol* gs = fd->generic_signature(); 794 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 795 java_lang_reflect_Field::set_signature(rh(), sig()); 796 } 797 if (java_lang_reflect_Field::has_annotations_field()) { 798 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 799 java_lang_reflect_Field::set_annotations(rh(), an_oop); 800 } 801 if (java_lang_reflect_Field::has_type_annotations_field()) { 802 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 803 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 804 } 805 return rh(); 806 } 807 808 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 809 int flags, TRAPS) { 810 811 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 812 813 if(NULL != sym) { 814 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 815 java_lang_reflect_Parameter::set_name(rh(), name()); 816 } else { 817 java_lang_reflect_Parameter::set_name(rh(), NULL); 818 } 819 820 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 821 java_lang_reflect_Parameter::set_executable(rh(), method()); 822 java_lang_reflect_Parameter::set_index(rh(), index); 823 return rh(); 824 } 825 826 827 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 828 KlassHandle recv_klass, Handle receiver, TRAPS) { 829 assert(!method.is_null() , "method should not be null"); 830 831 CallInfo info; 832 Symbol* signature = method->signature(); 833 Symbol* name = method->name(); 834 LinkResolver::resolve_interface_call(info, receiver, recv_klass, 835 LinkInfo(klass, name, signature, KlassHandle(), false), 836 true, 837 CHECK_(methodHandle())); 838 return info.selected_method(); 839 } 840 841 842 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 843 Handle receiver, bool override, objArrayHandle ptypes, 844 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 845 ResourceMark rm(THREAD); 846 847 methodHandle method; // actual method to invoke 848 KlassHandle target_klass; // target klass, receiver's klass for non-static 849 850 // Ensure klass is initialized 851 klass->initialize(CHECK_NULL); 852 853 bool is_static = reflected_method->is_static(); 854 if (is_static) { 855 // ignore receiver argument 856 method = reflected_method; 857 target_klass = klass; 858 } else { 859 // check for null receiver 860 if (receiver.is_null()) { 861 THROW_0(vmSymbols::java_lang_NullPointerException()); 862 } 863 // Check class of receiver against class declaring method 864 if (!receiver->is_a(klass())) { 865 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 866 } 867 // target klass is receiver's klass 868 target_klass = KlassHandle(THREAD, receiver->klass()); 869 // no need to resolve if method is private or <init> 870 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 871 method = reflected_method; 872 } else { 873 // resolve based on the receiver 874 if (reflected_method->method_holder()->is_interface()) { 875 // resolve interface call 876 // 877 // Match resolution errors with those thrown due to reflection inlining 878 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 879 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 880 if (HAS_PENDING_EXCEPTION) { 881 // Method resolution threw an exception; wrap it in an InvocationTargetException 882 oop resolution_exception = PENDING_EXCEPTION; 883 CLEAR_PENDING_EXCEPTION; 884 // JVMTI has already reported the pending exception 885 // JVMTI internal flag reset is needed in order to report InvocationTargetException 886 if (THREAD->is_Java_thread()) { 887 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 888 } 889 JavaCallArguments args(Handle(THREAD, resolution_exception)); 890 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 891 vmSymbols::throwable_void_signature(), 892 &args); 893 } 894 } else { 895 // if the method can be overridden, we resolve using the vtable index. 896 assert(!reflected_method->has_itable_index(), ""); 897 int index = reflected_method->vtable_index(); 898 method = reflected_method; 899 if (index != Method::nonvirtual_vtable_index) { 900 // target_klass might be an arrayKlassOop but all vtables start at 901 // the same place. The cast is to avoid virtual call and assertion. 902 InstanceKlass* inst = (InstanceKlass*)target_klass(); 903 method = methodHandle(THREAD, inst->method_at_vtable(index)); 904 } 905 if (!method.is_null()) { 906 // Check for abstract methods as well 907 if (method->is_abstract()) { 908 // new default: 6531596 909 ResourceMark rm(THREAD); 910 Handle h_origexception = Exceptions::new_exception(THREAD, 911 vmSymbols::java_lang_AbstractMethodError(), 912 Method::name_and_sig_as_C_string(target_klass(), 913 method->name(), 914 method->signature())); 915 JavaCallArguments args(h_origexception); 916 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 917 vmSymbols::throwable_void_signature(), 918 &args); 919 } 920 } 921 } 922 } 923 } 924 925 // I believe this is a ShouldNotGetHere case which requires 926 // an internal vtable bug. If you ever get this please let Karen know. 927 if (method.is_null()) { 928 ResourceMark rm(THREAD); 929 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 930 Method::name_and_sig_as_C_string(klass(), 931 reflected_method->name(), 932 reflected_method->signature())); 933 } 934 935 assert(ptypes->is_objArray(), "just checking"); 936 int args_len = args.is_null() ? 0 : args->length(); 937 // Check number of arguments 938 if (ptypes->length() != args_len) { 939 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 940 } 941 942 // Create object to contain parameters for the JavaCall 943 JavaCallArguments java_args(method->size_of_parameters()); 944 945 if (!is_static) { 946 java_args.push_oop(receiver); 947 } 948 949 for (int i = 0; i < args_len; i++) { 950 oop type_mirror = ptypes->obj_at(i); 951 oop arg = args->obj_at(i); 952 if (java_lang_Class::is_primitive(type_mirror)) { 953 jvalue value; 954 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 955 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 956 if (ptype != atype) { 957 widen(&value, atype, ptype, CHECK_NULL); 958 } 959 switch (ptype) { 960 case T_BOOLEAN: java_args.push_int(value.z); break; 961 case T_CHAR: java_args.push_int(value.c); break; 962 case T_BYTE: java_args.push_int(value.b); break; 963 case T_SHORT: java_args.push_int(value.s); break; 964 case T_INT: java_args.push_int(value.i); break; 965 case T_LONG: java_args.push_long(value.j); break; 966 case T_FLOAT: java_args.push_float(value.f); break; 967 case T_DOUBLE: java_args.push_double(value.d); break; 968 default: 969 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 970 } 971 } else { 972 if (arg != NULL) { 973 Klass* k = java_lang_Class::as_Klass(type_mirror); 974 if (!arg->is_a(k)) { 975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 976 } 977 } 978 Handle arg_handle(THREAD, arg); // Create handle for argument 979 java_args.push_oop(arg_handle); // Push handle 980 } 981 } 982 983 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 984 985 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 986 // oop (i.e., NOT as an handle) 987 JavaValue result(rtype); 988 JavaCalls::call(&result, method, &java_args, THREAD); 989 990 if (HAS_PENDING_EXCEPTION) { 991 // Method threw an exception; wrap it in an InvocationTargetException 992 oop target_exception = PENDING_EXCEPTION; 993 CLEAR_PENDING_EXCEPTION; 994 // JVMTI has already reported the pending exception 995 // JVMTI internal flag reset is needed in order to report InvocationTargetException 996 if (THREAD->is_Java_thread()) { 997 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 998 } 999 1000 JavaCallArguments args(Handle(THREAD, target_exception)); 1001 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1002 vmSymbols::throwable_void_signature(), 1003 &args); 1004 } else { 1005 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) { 1006 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1007 } 1008 return box((jvalue*) result.get_value_addr(), rtype, THREAD); 1009 } 1010 } 1011 1012 1013 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1014 switch (narrow_type) { 1015 case T_BOOLEAN: 1016 value->z = (jboolean) value->i; 1017 return; 1018 case T_BYTE: 1019 value->b = (jbyte) value->i; 1020 return; 1021 case T_CHAR: 1022 value->c = (jchar) value->i; 1023 return; 1024 case T_SHORT: 1025 value->s = (jshort) value->i; 1026 return; 1027 default: 1028 break; // fail 1029 } 1030 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1031 } 1032 1033 1034 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1035 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1036 return java_lang_Class::primitive_type(basic_type_mirror); 1037 } 1038 1039 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1040 // of java.lang.reflect.Constructor 1041 1042 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1043 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1044 int slot = java_lang_reflect_Method::slot(method_mirror); 1045 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1046 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1047 1048 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1049 BasicType rtype; 1050 if (java_lang_Class::is_primitive(return_type_mirror)) { 1051 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1052 } else { 1053 rtype = T_OBJECT; 1054 } 1055 1056 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1057 Method* m = klass->method_with_idnum(slot); 1058 if (m == NULL) { 1059 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1060 } 1061 methodHandle method(THREAD, m); 1062 1063 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1064 } 1065 1066 1067 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1068 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1069 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1070 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1071 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1072 1073 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1074 Method* m = klass->method_with_idnum(slot); 1075 if (m == NULL) { 1076 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1077 } 1078 methodHandle method(THREAD, m); 1079 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1080 1081 // Make sure klass gets initialize 1082 klass->initialize(CHECK_NULL); 1083 1084 // Create new instance (the receiver) 1085 klass->check_valid_for_instantiation(false, CHECK_NULL); 1086 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1087 1088 // Ignore result from call and return receiver 1089 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1090 return receiver(); 1091 }