reflection.cpp revision 1472:c18cbe5936b8
150479Speter/* 244196Srnordier * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 344196Srnordier * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 474816Sru * 544196Srnordier * This code is free software; you can redistribute it and/or modify it 6204352Sru * under the terms of the GNU General Public License version 2 only, as 7204352Sru * published by the Free Software Foundation. 8148036Sphk * 9228656Sdim * This code is distributed in the hope that it will be useful, but WITHOUT 10228656Sdim * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1144196Srnordier * 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 "incls/_precompiled.incl" 26#include "incls/_reflection.cpp.incl" 27 28#define JAVA_1_5_VERSION 49 29 30static void trace_class_resolution(klassOop to_class) { 31 ResourceMark rm; 32 int line_number = -1; 33 const char * source_file = NULL; 34 klassOop caller = NULL; 35 JavaThread* jthread = JavaThread::current(); 36 if (jthread->has_last_Java_frame()) { 37 vframeStream vfst(jthread); 38 // skip over any frames belonging to java.lang.Class 39 while (!vfst.at_end() && 40 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) { 41 vfst.next(); 42 } 43 if (!vfst.at_end()) { 44 // this frame is a likely suspect 45 caller = vfst.method()->method_holder(); 46 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 47 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); 48 if (s != NULL) { 49 source_file = s->as_C_string(); 50 } 51 } 52 } 53 if (caller != NULL) { 54 const char * from = Klass::cast(caller)->external_name(); 55 const char * to = Klass::cast(to_class)->external_name(); 56 // print in a single call to reduce interleaving between threads 57 if (source_file != NULL) { 58 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); 59 } else { 60 tty->print("RESOLVE %s %s (reflection)\n", from, to); 61 } 62 } 63} 64 65 66oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 67 if (type == T_VOID) { 68 return NULL; 69 } 70 if (type == T_OBJECT || type == T_ARRAY) { 71 // regular objects are not boxed 72 return (oop) value->l; 73 } 74 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 75 if (result == NULL) { 76 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 77 } 78 return result; 79} 80 81 82BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 83 if (box == NULL) { 84 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 85 } 86 return java_lang_boxing_object::get_value(box, value); 87} 88 89BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 90 // Note: box is really the unboxed oop. It might even be a Short, etc.! 91 value->l = (jobject) box; 92 return T_OBJECT; 93} 94 95 96void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 97 assert(wide_type != current_type, "widen should not be called with identical types"); 98 switch (wide_type) { 99 case T_BOOLEAN: 100 case T_BYTE: 101 case T_CHAR: 102 break; // fail 103 case T_SHORT: 104 switch (current_type) { 105 case T_BYTE: 106 value->s = (jshort) value->b; 107 return; 108 } 109 break; // fail 110 case T_INT: 111 switch (current_type) { 112 case T_BYTE: 113 value->i = (jint) value->b; 114 return; 115 case T_CHAR: 116 value->i = (jint) value->c; 117 return; 118 case T_SHORT: 119 value->i = (jint) value->s; 120 return; 121 } 122 break; // fail 123 case T_LONG: 124 switch (current_type) { 125 case T_BYTE: 126 value->j = (jlong) value->b; 127 return; 128 case T_CHAR: 129 value->j = (jlong) value->c; 130 return; 131 case T_SHORT: 132 value->j = (jlong) value->s; 133 return; 134 case T_INT: 135 value->j = (jlong) value->i; 136 return; 137 } 138 break; // fail 139 case T_FLOAT: 140 switch (current_type) { 141 case T_BYTE: 142 value->f = (jfloat) value->b; 143 return; 144 case T_CHAR: 145 value->f = (jfloat) value->c; 146 return; 147 case T_SHORT: 148 value->f = (jfloat) value->s; 149 return; 150 case T_INT: 151 value->f = (jfloat) value->i; 152 return; 153 case T_LONG: 154 value->f = (jfloat) value->j; 155 return; 156 } 157 break; // fail 158 case T_DOUBLE: 159 switch (current_type) { 160 case T_BYTE: 161 value->d = (jdouble) value->b; 162 return; 163 case T_CHAR: 164 value->d = (jdouble) value->c; 165 return; 166 case T_SHORT: 167 value->d = (jdouble) value->s; 168 return; 169 case T_INT: 170 value->d = (jdouble) value->i; 171 return; 172 case T_FLOAT: 173 value->d = (jdouble) value->f; 174 return; 175 case T_LONG: 176 value->d = (jdouble) value->j; 177 return; 178 } 179 break; // fail 180 default: 181 break; // fail 182 } 183 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 184} 185 186 187BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 188 if (!a->is_within_bounds(index)) { 189 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 190 } 191 if (a->is_objArray()) { 192 value->l = (jobject) objArrayOop(a)->obj_at(index); 193 return T_OBJECT; 194 } else { 195 assert(a->is_typeArray(), "just checking"); 196 BasicType type = typeArrayKlass::cast(a->klass())->element_type(); 197 switch (type) { 198 case T_BOOLEAN: 199 value->z = typeArrayOop(a)->bool_at(index); 200 break; 201 case T_CHAR: 202 value->c = typeArrayOop(a)->char_at(index); 203 break; 204 case T_FLOAT: 205 value->f = typeArrayOop(a)->float_at(index); 206 break; 207 case T_DOUBLE: 208 value->d = typeArrayOop(a)->double_at(index); 209 break; 210 case T_BYTE: 211 value->b = typeArrayOop(a)->byte_at(index); 212 break; 213 case T_SHORT: 214 value->s = typeArrayOop(a)->short_at(index); 215 break; 216 case T_INT: 217 value->i = typeArrayOop(a)->int_at(index); 218 break; 219 case T_LONG: 220 value->j = typeArrayOop(a)->long_at(index); 221 break; 222 default: 223 return T_ILLEGAL; 224 } 225 return type; 226 } 227} 228 229 230void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 231 if (!a->is_within_bounds(index)) { 232 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 233 } 234 if (a->is_objArray()) { 235 if (value_type == T_OBJECT) { 236 oop obj = (oop) value->l; 237 if (obj != NULL) { 238 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass(); 239 if (!obj->is_a(element_klass)) { 240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 241 } 242 } 243 objArrayOop(a)->obj_at_put(index, obj); 244 } 245 } else { 246 assert(a->is_typeArray(), "just checking"); 247 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type(); 248 if (array_type != value_type) { 249 // The widen operation can potentially throw an exception, but cannot block, 250 // so typeArrayOop a is safe if the call succeeds. 251 widen(value, value_type, array_type, CHECK); 252 } 253 switch (array_type) { 254 case T_BOOLEAN: 255 typeArrayOop(a)->bool_at_put(index, value->z); 256 break; 257 case T_CHAR: 258 typeArrayOop(a)->char_at_put(index, value->c); 259 break; 260 case T_FLOAT: 261 typeArrayOop(a)->float_at_put(index, value->f); 262 break; 263 case T_DOUBLE: 264 typeArrayOop(a)->double_at_put(index, value->d); 265 break; 266 case T_BYTE: 267 typeArrayOop(a)->byte_at_put(index, value->b); 268 break; 269 case T_SHORT: 270 typeArrayOop(a)->short_at_put(index, value->s); 271 break; 272 case T_INT: 273 typeArrayOop(a)->int_at_put(index, value->i); 274 break; 275 case T_LONG: 276 typeArrayOop(a)->long_at_put(index, value->j); 277 break; 278 default: 279 THROW(vmSymbols::java_lang_IllegalArgumentException()); 280 } 281 } 282} 283 284 285klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 286 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 287 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 288 if (type == T_VOID) { 289 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 290 } else { 291 return Universe::typeArrayKlassObj(type); 292 } 293} 294 295 296oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) { 297 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type(); 298 return Universe::java_mirror(type); 299} 300 301 302arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 303 if (element_mirror == NULL) { 304 THROW_0(vmSymbols::java_lang_NullPointerException()); 305 } 306 if (length < 0) { 307 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 308 } 309 if (java_lang_Class::is_primitive(element_mirror)) { 310 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 311 return typeArrayKlass::cast(tak)->allocate(length, THREAD); 312 } else { 313 klassOop k = java_lang_Class::as_klassOop(element_mirror); 314 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) { 315 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 316 } 317 return oopFactory::new_objArray(k, length, THREAD); 318 } 319} 320 321 322arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 323 assert(dim_array->is_typeArray(), "just checking"); 324 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 325 326 if (element_mirror == NULL) { 327 THROW_0(vmSymbols::java_lang_NullPointerException()); 328 } 329 330 int len = dim_array->length(); 331 if (len <= 0 || len > MAX_DIM) { 332 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 333 } 334 335 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 336 for (int i = 0; i < len; i++) { 337 int d = dim_array->int_at(i); 338 if (d < 0) { 339 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 340 } 341 dimensions[i] = d; 342 } 343 344 klassOop klass; 345 int dim = len; 346 if (java_lang_Class::is_primitive(element_mirror)) { 347 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 348 } else { 349 klass = java_lang_Class::as_klassOop(element_mirror); 350 if (Klass::cast(klass)->oop_is_array()) { 351 int k_dim = arrayKlass::cast(klass)->dimension(); 352 if (k_dim + len > MAX_DIM) { 353 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 354 } 355 dim += k_dim; 356 } 357 } 358 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL); 359 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD); 360 assert(obj->is_array(), "just checking"); 361 return arrayOop(obj); 362} 363 364 365oop Reflection::array_component_type(oop mirror, TRAPS) { 366 if (java_lang_Class::is_primitive(mirror)) { 367 return NULL; 368 } 369 370 klassOop klass = java_lang_Class::as_klassOop(mirror); 371 if (!Klass::cast(klass)->oop_is_array()) { 372 return NULL; 373 } 374 375 oop result = arrayKlass::cast(klass)->component_mirror(); 376#ifdef ASSERT 377 oop result2 = NULL; 378 if (arrayKlass::cast(klass)->dimension() == 1) { 379 if (Klass::cast(klass)->oop_is_typeArray()) { 380 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 381 } else { 382 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror(); 383 } 384 } else { 385 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension(); 386 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking"); 387 result2 = Klass::cast(lower_dim)->java_mirror(); 388 } 389 assert(result == result2, "results must be consistent"); 390#endif //ASSERT 391 return result; 392} 393 394 395bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) { 396 // field_class : declaring class 397 // acc : declared field access 398 // target_class : for protected 399 400 // Check if field or method is accessible to client. Throw an 401 // IllegalAccessException and return false if not. 402 403 // The "client" is the class associated with the nearest real frame 404 // getCallerClass already skips Method.invoke frames, so pass 0 in 405 // that case (same as classic). 406 ResourceMark rm(THREAD); 407 assert(THREAD->is_Java_thread(), "sanity check"); 408 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1); 409 410 if (client_class != field_class) { 411 if (!verify_class_access(client_class, field_class, false) 412 || !verify_field_access(client_class, 413 field_class, 414 field_class, 415 acc, 416 false)) { 417 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 418 } 419 } 420 421 // Additional test for protected members: JLS 6.6.2 422 423 if (acc.is_protected()) { 424 if (target_class != client_class) { 425 if (!is_same_class_package(client_class, field_class)) { 426 if (!Klass::cast(target_class)->is_subclass_of(client_class)) { 427 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 428 } 429 } 430 } 431 } 432 433 // Passed all tests 434 return true; 435} 436 437 438bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) { 439 // Verify that current_class can access new_class. If the classloader_only 440 // flag is set, we automatically allow any accesses in which current_class 441 // doesn't have a classloader. 442 if ((current_class == NULL) || 443 (current_class == new_class) || 444 (instanceKlass::cast(new_class)->is_public()) || 445 is_same_class_package(current_class, new_class)) { 446 return true; 447 } 448 // New (1.4) reflection implementation. Allow all accesses from 449 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. 450 if ( JDK_Version::is_gte_jdk14x_version() 451 && UseNewReflection 452 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 453 return true; 454 } 455 456 return can_relax_access_check_for(current_class, new_class, classloader_only); 457} 458 459static bool under_host_klass(instanceKlass* ik, klassOop host_klass) { 460 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 461 for (;;) { 462 klassOop hc = (klassOop) ik->host_klass(); 463 if (hc == NULL) return false; 464 if (hc == host_klass) return true; 465 ik = instanceKlass::cast(hc); 466 467 // There's no way to make a host class loop short of patching memory. 468 // Therefore there cannot be a loop here unles there's another bug. 469 // Still, let's check for it. 470 assert(--inf_loop_check > 0, "no host_klass loop"); 471 } 472} 473 474bool Reflection::can_relax_access_check_for( 475 klassOop accessor, klassOop accessee, bool classloader_only) { 476 instanceKlass* accessor_ik = instanceKlass::cast(accessor); 477 instanceKlass* accessee_ik = instanceKlass::cast(accessee); 478 479 // If either is on the other's host_klass chain, access is OK, 480 // because one is inside the other. 481 if (under_host_klass(accessor_ik, accessee) || 482 under_host_klass(accessee_ik, accessor)) 483 return true; 484 485 // Adapter frames can access anything. 486 if (MethodHandleCompiler::klass_is_method_handle_adapter_holder(accessor)) 487 // This is an internal adapter frame from the MethodHandleCompiler. 488 return true; 489 490 if (RelaxAccessControlCheck || 491 (accessor_ik->major_version() < JAVA_1_5_VERSION && 492 accessee_ik->major_version() < JAVA_1_5_VERSION)) { 493 return classloader_only && 494 Verifier::relax_verify_for(accessor_ik->class_loader()) && 495 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 496 accessor_ik->class_loader() == accessee_ik->class_loader(); 497 } else { 498 return false; 499 } 500} 501 502bool Reflection::verify_field_access(klassOop current_class, 503 klassOop resolved_class, 504 klassOop field_class, 505 AccessFlags access, 506 bool classloader_only, 507 bool protected_restriction) { 508 // Verify that current_class can access a field of field_class, where that 509 // field's access bits are "access". We assume that we've already verified 510 // that current_class can access field_class. 511 // 512 // If the classloader_only flag is set, we automatically allow any accesses 513 // in which current_class doesn't have a classloader. 514 // 515 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 516 // need this distinction (e.g. if all we have is the runtime type, or during 517 // class file parsing when we only care about the static type); in that case 518 // callers should ensure that resolved_class == field_class. 519 // 520 if ((current_class == NULL) || 521 (current_class == field_class) || 522 access.is_public()) { 523 return true; 524 } 525 526 if (access.is_protected()) { 527 if (!protected_restriction) { 528 // See if current_class is a subclass of field_class 529 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 530 if (access.is_static() || // static fields are ok, see 6622385 531 current_class == resolved_class || 532 field_class == resolved_class || 533 Klass::cast(current_class)->is_subclass_of(resolved_class) || 534 Klass::cast(resolved_class)->is_subclass_of(current_class)) { 535 return true; 536 } 537 } 538 } 539 } 540 541 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 542 return true; 543 } 544 545 // New (1.4) reflection implementation. Allow all accesses from 546 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. 547 if ( JDK_Version::is_gte_jdk14x_version() 548 && UseNewReflection 549 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 550 return true; 551 } 552 553 return can_relax_access_check_for( 554 current_class, field_class, classloader_only); 555} 556 557 558bool Reflection::is_same_class_package(klassOop class1, klassOop class2) { 559 return instanceKlass::cast(class1)->is_same_class_package(class2); 560} 561 562bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) { 563 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD); 564} 565 566 567// Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 568// throw an incompatible class change exception 569// If inner_is_member, require the inner to be a member of the outer. 570// If !inner_is_member, require the inner to be anonymous (a non-member). 571// Caller is responsible for figuring out in advance which case must be true. 572void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 573 bool inner_is_member, TRAPS) { 574 const int inner_class_info_index = 0; 575 const int outer_class_info_index = 1; 576 577 typeArrayHandle icls (THREAD, outer->inner_classes()); 578 constantPoolHandle cp (THREAD, outer->constants()); 579 for(int i = 0; i < icls->length(); i += 4) { 580 int ioff = icls->ushort_at(i + inner_class_info_index); 581 int ooff = icls->ushort_at(i + outer_class_info_index); 582 583 if (inner_is_member && ioff != 0 && ooff != 0) { 584 klassOop o = cp->klass_at(ooff, CHECK); 585 if (o == outer()) { 586 klassOop i = cp->klass_at(ioff, CHECK); 587 if (i == inner()) { 588 return; 589 } 590 } 591 } 592 if (!inner_is_member && ioff != 0 && ooff == 0 && 593 cp->klass_name_at_matches(inner, ioff)) { 594 klassOop i = cp->klass_at(ioff, CHECK); 595 if (i == inner()) { 596 return; 597 } 598 } 599 } 600 601 // 'inner' not declared as an inner klass in outer 602 ResourceMark rm(THREAD); 603 Exceptions::fthrow( 604 THREAD_AND_LOCATION, 605 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), 606 "%s and %s disagree on InnerClasses attribute", 607 outer->external_name(), 608 inner->external_name() 609 ); 610} 611 612// Utility method converting a single SignatureStream element into java.lang.Class instance 613 614oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 615 switch (ss->type()) { 616 default: 617 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 618 return java_lang_Class::primitive_mirror(ss->type()); 619 case T_OBJECT: 620 case T_ARRAY: 621 symbolOop name = ss->as_symbol(CHECK_NULL); 622 oop loader = instanceKlass::cast(method->method_holder())->class_loader(); 623 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 624 klassOop k = SystemDictionary::resolve_or_fail( 625 symbolHandle(THREAD, name), 626 Handle(THREAD, loader), 627 Handle(THREAD, protection_domain), 628 true, CHECK_NULL); 629 if (TraceClassResolution) { 630 trace_class_resolution(k); 631 } 632 return k->klass_part()->java_mirror(); 633 }; 634} 635 636 637objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 638 // Allocate array holding parameter types (java.lang.Class instances) 639 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 640 objArrayHandle mirrors (THREAD, m); 641 int index = 0; 642 // Collect parameter types 643 symbolHandle signature (THREAD, method->signature()); 644 SignatureStream ss(signature); 645 while (!ss.at_return_type()) { 646 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 647 mirrors->obj_at_put(index++, mirror); 648 ss.next(); 649 } 650 assert(index == parameter_count, "invalid parameter count"); 651 if (return_type != NULL) { 652 // Collect return type as well 653 assert(ss.at_return_type(), "return type should be present"); 654 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 655 } 656 return mirrors; 657} 658 659objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 660 return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); 661} 662 663 664Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) { 665 // Basic types 666 BasicType type = vmSymbols::signature_type(signature()); 667 if (type != T_OBJECT) { 668 return Handle(THREAD, Universe::java_mirror(type)); 669 } 670 671 oop loader = instanceKlass::cast(k())->class_loader(); 672 oop protection_domain = Klass::cast(k())->protection_domain(); 673 klassOop result = SystemDictionary::resolve_or_fail(signature, 674 Handle(THREAD, loader), 675 Handle(THREAD, protection_domain), 676 true, CHECK_(Handle())); 677 678 if (TraceClassResolution) { 679 trace_class_resolution(result); 680 } 681 682 oop nt = Klass::cast(result)->java_mirror(); 683 return Handle(THREAD, nt); 684} 685 686 687oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) { 688 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert. 689 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 690 assert(!method()->is_initializer() || 691 (for_constant_pool_access && method()->is_static()) || 692 (method()->name() == vmSymbols::class_initializer_name() 693 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead"); 694 instanceKlassHandle holder (THREAD, method->method_holder()); 695 int slot = method->method_idnum(); 696 697 symbolHandle signature (THREAD, method->signature()); 698 int parameter_count = ArgumentCount(signature).size(); 699 oop return_type_oop = NULL; 700 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 701 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 702 703 Handle return_type(THREAD, return_type_oop); 704 705 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 706 707 if (exception_types.is_null()) return NULL; 708 709 symbolHandle method_name(THREAD, method->name()); 710 Handle name; 711 if (intern_name) { 712 // intern_name is only true with UseNewReflection 713 oop name_oop = StringTable::intern(method_name(), CHECK_NULL); 714 name = Handle(THREAD, name_oop); 715 } else { 716 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL); 717 } 718 if (name.is_null()) return NULL; 719 720 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 721 722 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 723 724 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 725 java_lang_reflect_Method::set_slot(mh(), slot); 726 java_lang_reflect_Method::set_name(mh(), name()); 727 java_lang_reflect_Method::set_return_type(mh(), return_type()); 728 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 729 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 730 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 731 java_lang_reflect_Method::set_override(mh(), false); 732 if (java_lang_reflect_Method::has_signature_field() && 733 method->generic_signature() != NULL) { 734 symbolHandle gs(THREAD, method->generic_signature()); 735 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 736 java_lang_reflect_Method::set_signature(mh(), sig()); 737 } 738 if (java_lang_reflect_Method::has_annotations_field()) { 739 java_lang_reflect_Method::set_annotations(mh(), method->annotations()); 740 } 741 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 742 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations()); 743 } 744 if (java_lang_reflect_Method::has_annotation_default_field()) { 745 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default()); 746 } 747 return mh(); 748} 749 750 751oop Reflection::new_constructor(methodHandle method, TRAPS) { 752 assert(method()->is_initializer(), "should call new_method instead"); 753 754 instanceKlassHandle holder (THREAD, method->method_holder()); 755 int slot = method->method_idnum(); 756 757 symbolHandle signature (THREAD, method->signature()); 758 int parameter_count = ArgumentCount(signature).size(); 759 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 760 if (parameter_types.is_null()) return NULL; 761 762 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 763 if (exception_types.is_null()) return NULL; 764 765 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 766 767 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 768 769 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 770 java_lang_reflect_Constructor::set_slot(ch(), slot); 771 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 772 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 773 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 774 java_lang_reflect_Constructor::set_override(ch(), false); 775 if (java_lang_reflect_Constructor::has_signature_field() && 776 method->generic_signature() != NULL) { 777 symbolHandle gs(THREAD, method->generic_signature()); 778 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 779 java_lang_reflect_Constructor::set_signature(ch(), sig()); 780 } 781 if (java_lang_reflect_Constructor::has_annotations_field()) { 782 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations()); 783 } 784 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 785 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations()); 786 } 787 return ch(); 788} 789 790 791oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) { 792 symbolHandle field_name(THREAD, fd->name()); 793 Handle name; 794 if (intern_name) { 795 // intern_name is only true with UseNewReflection 796 oop name_oop = StringTable::intern(field_name(), CHECK_NULL); 797 name = Handle(THREAD, name_oop); 798 } else { 799 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 800 } 801 symbolHandle signature (THREAD, fd->signature()); 802 KlassHandle holder (THREAD, fd->field_holder()); 803 Handle type = new_type(signature, holder, CHECK_NULL); 804 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 805 806 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror()); 807 java_lang_reflect_Field::set_slot(rh(), fd->index()); 808 java_lang_reflect_Field::set_name(rh(), name()); 809 java_lang_reflect_Field::set_type(rh(), type()); 810 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 811 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 812 java_lang_reflect_Field::set_override(rh(), false); 813 if (java_lang_reflect_Field::has_signature_field() && 814 fd->generic_signature() != NULL) { 815 symbolHandle gs(THREAD, fd->generic_signature()); 816 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 817 java_lang_reflect_Field::set_signature(rh(), sig()); 818 } 819 if (java_lang_reflect_Field::has_annotations_field()) { 820 java_lang_reflect_Field::set_annotations(rh(), fd->annotations()); 821 } 822 return rh(); 823} 824 825 826//--------------------------------------------------------------------------- 827// 828// Supporting routines for old native code-based reflection (pre-JDK 1.4). 829// 830// See reflection.hpp for details. 831// 832//--------------------------------------------------------------------------- 833 834#ifdef SUPPORT_OLD_REFLECTION 835 836methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 837 KlassHandle recv_klass, Handle receiver, TRAPS) { 838 assert(!method.is_null() , "method should not be null"); 839 840 CallInfo info; 841 symbolHandle signature (THREAD, method->signature()); 842 symbolHandle name (THREAD, method->name()); 843 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, 844 name, signature, 845 KlassHandle(), false, true, 846 CHECK_(methodHandle())); 847 return info.selected_method(); 848} 849 850 851oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 852 Handle receiver, bool override, objArrayHandle ptypes, 853 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 854 ResourceMark rm(THREAD); 855 856 methodHandle method; // actual method to invoke 857 KlassHandle target_klass; // target klass, receiver's klass for non-static 858 859 // Ensure klass is initialized 860 klass->initialize(CHECK_NULL); 861 862 bool is_static = reflected_method->is_static(); 863 if (is_static) { 864 // ignore receiver argument 865 method = reflected_method; 866 target_klass = klass; 867 } else { 868 // check for null receiver 869 if (receiver.is_null()) { 870 THROW_0(vmSymbols::java_lang_NullPointerException()); 871 } 872 // Check class of receiver against class declaring method 873 if (!receiver->is_a(klass())) { 874 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 875 } 876 // target klass is receiver's klass 877 target_klass = KlassHandle(THREAD, receiver->klass()); 878 // no need to resolve if method is private or <init> 879 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 880 method = reflected_method; 881 } else { 882 // resolve based on the receiver 883 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) { 884 // resolve interface call 885 if (ReflectionWrapResolutionErrors) { 886 // new default: 6531596 887 // Match resolution errors with those thrown due to reflection inlining 888 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 889 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 890 if (HAS_PENDING_EXCEPTION) { 891 // Method resolution threw an exception; wrap it in an InvocationTargetException 892 oop resolution_exception = PENDING_EXCEPTION; 893 CLEAR_PENDING_EXCEPTION; 894 JavaCallArguments args(Handle(THREAD, resolution_exception)); 895 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 896 vmSymbolHandles::throwable_void_signature(), 897 &args); 898 } 899 } else { 900 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL)); 901 } 902 } else { 903 // if the method can be overridden, we resolve using the vtable index. 904 int index = reflected_method->vtable_index(); 905 method = reflected_method; 906 if (index != methodOopDesc::nonvirtual_vtable_index) { 907 // target_klass might be an arrayKlassOop but all vtables start at 908 // the same place. The cast is to avoid virtual call and assertion. 909 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part(); 910 method = methodHandle(THREAD, inst->method_at_vtable(index)); 911 } 912 if (!method.is_null()) { 913 // Check for abstract methods as well 914 if (method->is_abstract()) { 915 // new default: 6531596 916 if (ReflectionWrapResolutionErrors) { 917 ResourceMark rm(THREAD); 918 Handle h_origexception = Exceptions::new_exception(THREAD, 919 vmSymbols::java_lang_AbstractMethodError(), 920 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 921 method->name(), 922 method->signature())); 923 JavaCallArguments args(h_origexception); 924 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 925 vmSymbolHandles::throwable_void_signature(), 926 &args); 927 } else { 928 ResourceMark rm(THREAD); 929 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(), 930 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 931 method->name(), 932 method->signature())); 933 } 934 } 935 } 936 } 937 } 938 } 939 940 // I believe this is a ShouldNotGetHere case which requires 941 // an internal vtable bug. If you ever get this please let Karen know. 942 if (method.is_null()) { 943 ResourceMark rm(THREAD); 944 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 945 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()), 946 reflected_method->name(), 947 reflected_method->signature())); 948 } 949 950 // In the JDK 1.4 reflection implementation, the security check is 951 // done at the Java level 952 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) { 953 954 // Access checking (unless overridden by Method) 955 if (!override) { 956 if (!(klass->is_public() && reflected_method->is_public())) { 957 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL); 958 if (!access) { 959 return NULL; // exception 960 } 961 } 962 } 963 964 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection) 965 966 assert(ptypes->is_objArray(), "just checking"); 967 int args_len = args.is_null() ? 0 : args->length(); 968 // Check number of arguments 969 if (ptypes->length() != args_len) { 970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 971 } 972 973 // Create object to contain parameters for the JavaCall 974 JavaCallArguments java_args(method->size_of_parameters()); 975 976 if (!is_static) { 977 java_args.push_oop(receiver); 978 } 979 980 for (int i = 0; i < args_len; i++) { 981 oop type_mirror = ptypes->obj_at(i); 982 oop arg = args->obj_at(i); 983 if (java_lang_Class::is_primitive(type_mirror)) { 984 jvalue value; 985 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 986 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 987 if (ptype != atype) { 988 widen(&value, atype, ptype, CHECK_NULL); 989 } 990 switch (ptype) { 991 case T_BOOLEAN: java_args.push_int(value.z); break; 992 case T_CHAR: java_args.push_int(value.c); break; 993 case T_BYTE: java_args.push_int(value.b); break; 994 case T_SHORT: java_args.push_int(value.s); break; 995 case T_INT: java_args.push_int(value.i); break; 996 case T_LONG: java_args.push_long(value.j); break; 997 case T_FLOAT: java_args.push_float(value.f); break; 998 case T_DOUBLE: java_args.push_double(value.d); break; 999 default: 1000 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1001 } 1002 } else { 1003 if (arg != NULL) { 1004 klassOop k = java_lang_Class::as_klassOop(type_mirror); 1005 if (!arg->is_a(k)) { 1006 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1007 } 1008 } 1009 Handle arg_handle(THREAD, arg); // Create handle for argument 1010 java_args.push_oop(arg_handle); // Push handle 1011 } 1012 } 1013 1014 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 1015 1016 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1017 // oop (i.e., NOT as an handle) 1018 JavaValue result(rtype); 1019 JavaCalls::call(&result, method, &java_args, THREAD); 1020 1021 if (HAS_PENDING_EXCEPTION) { 1022 // Method threw an exception; wrap it in an InvocationTargetException 1023 oop target_exception = PENDING_EXCEPTION; 1024 CLEAR_PENDING_EXCEPTION; 1025 JavaCallArguments args(Handle(THREAD, target_exception)); 1026 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 1027 vmSymbolHandles::throwable_void_signature(), 1028 &args); 1029 } else { 1030 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) 1031 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1032 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1033 } 1034} 1035 1036 1037void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1038 switch (narrow_type) { 1039 case T_BOOLEAN: 1040 value->z = (jboolean) value->i; 1041 return; 1042 case T_BYTE: 1043 value->b = (jbyte) value->i; 1044 return; 1045 case T_CHAR: 1046 value->c = (jchar) value->i; 1047 return; 1048 case T_SHORT: 1049 value->s = (jshort) value->i; 1050 return; 1051 default: 1052 break; // fail 1053 } 1054 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1055} 1056 1057 1058BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1059 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1060 return java_lang_Class::primitive_type(basic_type_mirror); 1061} 1062 1063 1064bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) { 1065 int types_len = types.is_null() ? 0 : types->length(); 1066 if (types_len != parameter_count) return false; 1067 if (parameter_count > 0) { 1068 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false); 1069 for (int index = 0; index < parameter_count; index++) { 1070 if (types->obj_at(index) != method_types->obj_at(index)) { 1071 return false; 1072 } 1073 } 1074 } 1075 return true; 1076} 1077 1078 1079oop Reflection::new_field(FieldStream* st, TRAPS) { 1080 symbolHandle field_name(THREAD, st->name()); 1081 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 1082 symbolHandle signature(THREAD, st->signature()); 1083 Handle type = new_type(signature, st->klass(), CHECK_NULL); 1084 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 1085 oop result = rh(); 1086 1087 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror()); 1088 java_lang_reflect_Field::set_slot(result, st->index()); 1089 java_lang_reflect_Field::set_name(result, name()); 1090 java_lang_reflect_Field::set_type(result, type()); 1091 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 1092 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 1093 java_lang_reflect_Field::set_override(result, false); 1094 return result; 1095} 1096 1097 1098bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) { 1099 if (field_mirror.is_null()) { 1100 THROW_(vmSymbols::java_lang_NullPointerException(), false); 1101 } 1102 1103 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror()))); 1104 int slot = java_lang_reflect_Field::slot(field_mirror()); 1105 1106 // Ensure klass is initialized 1107 klass->initialize(CHECK_false); 1108 fd->initialize(klass(), slot); 1109 1110 bool is_static = fd->is_static(); 1111 KlassHandle receiver_klass; 1112 1113 if (is_static) { 1114 receiver = KlassHandle(THREAD, klass()); 1115 receiver_klass = klass; 1116 } else { 1117 // Check object is a non-null instance of declaring class 1118 if (receiver.is_null()) { 1119 THROW_(vmSymbols::java_lang_NullPointerException(), false); 1120 } 1121 if (!receiver->is_a(klass())) { 1122 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false); 1123 } 1124 receiver_klass = KlassHandle(THREAD, receiver->klass()); 1125 } 1126 1127 // Access checking (unless overridden by Field) 1128 if (!java_lang_reflect_Field::override(field_mirror())) { 1129 if (!(klass->is_public() && fd->is_public())) { 1130 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false); 1131 if (!access_check) { 1132 return false; // exception 1133 } 1134 } 1135 } 1136 1137 if (check_final && fd->is_final()) { 1138 // In 1.3 we always throw an error when attempting to set a final field. 1139 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true). 1140 // We currently maintain backwards compatibility. See bug 4250960. 1141 bool strict_final_check = !JDK_Version::is_jdk12x_version(); 1142 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) { 1143 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false); 1144 } 1145 } 1146 return true; 1147} 1148 1149 1150BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) { 1151 BasicType field_type = fd->field_type(); 1152 int offset = fd->offset(); 1153 switch (field_type) { 1154 case T_BOOLEAN: 1155 value->z = receiver->bool_field(offset); 1156 break; 1157 case T_CHAR: 1158 value->c = receiver->char_field(offset); 1159 break; 1160 case T_FLOAT: 1161 value->f = receiver->float_field(offset); 1162 break; 1163 case T_DOUBLE: 1164 value->d = receiver->double_field(offset); 1165 break; 1166 case T_BYTE: 1167 value->b = receiver->byte_field(offset); 1168 break; 1169 case T_SHORT: 1170 value->s = receiver->short_field(offset); 1171 break; 1172 case T_INT: 1173 value->i = receiver->int_field(offset); 1174 break; 1175 case T_LONG: 1176 value->j = receiver->long_field(offset); 1177 break; 1178 case T_OBJECT: 1179 case T_ARRAY: 1180 value->l = (jobject) receiver->obj_field(offset); 1181 break; 1182 default: 1183 return T_ILLEGAL; 1184 } 1185 return field_type; 1186} 1187 1188 1189void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) { 1190 BasicType field_type = fd->field_type(); 1191 if (field_type != value_type) { 1192 widen(value, value_type, field_type, CHECK); 1193 } 1194 1195 int offset = fd->offset(); 1196 switch (field_type) { 1197 case T_BOOLEAN: 1198 receiver->bool_field_put(offset, value->z); 1199 break; 1200 case T_CHAR: 1201 receiver->char_field_put(offset, value->c); 1202 break; 1203 case T_FLOAT: 1204 receiver->float_field_put(offset, value->f); 1205 break; 1206 case T_DOUBLE: 1207 receiver->double_field_put(offset, value->d); 1208 break; 1209 case T_BYTE: 1210 receiver->byte_field_put(offset, value->b); 1211 break; 1212 case T_SHORT: 1213 receiver->short_field_put(offset, value->s); 1214 break; 1215 case T_INT: 1216 receiver->int_field_put(offset, value->i); 1217 break; 1218 case T_LONG: 1219 receiver->long_field_put(offset, value->j); 1220 break; 1221 case T_OBJECT: 1222 case T_ARRAY: { 1223 Handle obj(THREAD, (oop) value->l); 1224 if (obj.not_null()) { 1225 symbolHandle signature(THREAD, fd->signature()); 1226 Handle loader (THREAD, fd->loader()); 1227 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain()); 1228 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block 1229 if (!obj->is_a(k)) { 1230 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch"); 1231 } 1232 } 1233 receiver->obj_field_put(offset, obj()); 1234 break; 1235 } 1236 default: 1237 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch"); 1238 } 1239} 1240 1241 1242oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) { 1243 // Exclude primitive types and array types 1244 if (java_lang_Class::is_primitive(mirror)) return NULL; 1245 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL; 1246 1247 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror)); 1248 bool local_fields_only = (which == DECLARED); 1249 1250 // Ensure class is linked 1251 k->link_class(CHECK_NULL); 1252 1253 // Search class and interface fields 1254 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1255 if (st.name() == field_name) { 1256 if (local_fields_only || st.access_flags().is_public()) { 1257 return new_field(&st, THREAD); 1258 } 1259 } 1260 } 1261 1262 return NULL; 1263} 1264 1265 1266objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) { 1267 // Exclude primitive types and array types 1268 if (java_lang_Class::is_primitive(mirror) 1269 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1270 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1271 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1272 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array 1273 } 1274 1275 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror)); 1276 1277 // Ensure class is linked 1278 k->link_class(CHECK_NULL); 1279 1280 bool local_fields_only = (which == DECLARED); 1281 int count = 0; 1282 { // Compute fields count for class and interface fields 1283 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1284 if (local_fields_only || st.access_flags().is_public()) { 1285 count++; 1286 } 1287 } 1288 } 1289 1290 // Allocate result 1291 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1292 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1293 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1294 objArrayHandle result (THREAD, r); 1295 1296 // Fill in results backwards 1297 { 1298 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1299 if (local_fields_only || st.access_flags().is_public()) { 1300 oop field = new_field(&st, CHECK_NULL); 1301 result->obj_at_put(--count, field); 1302 } 1303 } 1304 assert(count == 0, "just checking"); 1305 } 1306 return result(); 1307} 1308 1309 1310oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) { 1311 if (java_lang_Class::is_primitive(mirror)) return NULL; 1312 klassOop klass = java_lang_Class::as_klassOop(mirror); 1313 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL; 1314 1315 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1316 klass = SystemDictionary::Object_klass(); 1317 } 1318 instanceKlassHandle h_k(THREAD, klass); 1319 1320 // Ensure klass is linked (need not be initialized) 1321 h_k->link_class(CHECK_NULL); 1322 1323 // For interfaces include static initializers under jdk1.2.x (since classic does that) 1324 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface(); 1325 1326 switch (which) { 1327 case MEMBER_PUBLIC: 1328 // First the public non-static methods (works if method holder is an interface) 1329 // Note that we can ignore checks for overridden methods, since we go up the hierarchy. 1330 { 1331 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1332 methodHandle m(THREAD, st.method()); 1333 // For interfaces include static initializers since classic does that! 1334 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) { 1335 symbolHandle signature(THREAD, m->signature()); 1336 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1337 if (parameter_match) { 1338 return new_method(m, false, false, THREAD); 1339 } 1340 } 1341 } 1342 } 1343 // Then the public static methods (works if method holder is an interface) 1344 { 1345 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1346 methodHandle m(THREAD, st.method()); 1347 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) { 1348 symbolHandle signature(THREAD, m->signature()); 1349 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1350 if (parameter_match) { 1351 return new_method(m, false, false, THREAD); 1352 } 1353 } 1354 } 1355 } 1356 break; 1357 case MEMBER_DECLARED: 1358 // All local methods 1359 { 1360 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1361 methodHandle m(THREAD, st.method()); 1362 if (method_name() == m->name() && !m->is_initializer()) { 1363 symbolHandle signature(THREAD, m->signature()); 1364 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1365 if (parameter_match) { 1366 return new_method(m, false, false, THREAD); 1367 } 1368 } 1369 } 1370 } 1371 break; 1372 default: 1373 break; 1374 } 1375 return NULL; 1376} 1377 1378 1379objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) { 1380 // Exclude primitive types 1381 if (java_lang_Class::is_primitive(mirror) || 1382 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) { 1383 klassOop klass = SystemDictionary::reflect_Method_klass(); 1384 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array 1385 } 1386 1387 klassOop klass = java_lang_Class::as_klassOop(mirror); 1388 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1389 klass = SystemDictionary::Object_klass(); 1390 } 1391 instanceKlassHandle h_k(THREAD, klass); 1392 1393 // Ensure klass is linked (need not be initialized) 1394 h_k->link_class(CHECK_NULL); 1395 1396 // We search the (super)interfaces only if h_k is an interface itself 1397 bool is_interface = h_k->is_interface(); 1398 1399 // For interfaces include static initializers under jdk1.2.x (since classic does that) 1400 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface; 1401 1402 switch (which) { 1403 case MEMBER_PUBLIC: 1404 { 1405 1406 // Count public methods (non-static and static) 1407 int count = 0; 1408 { 1409 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1410 methodOop m = st.method(); 1411 // For interfaces include static initializers since classic does that! 1412 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) { 1413 count++; 1414 } 1415 } 1416 } 1417 1418 // Allocate result 1419 klassOop klass = SystemDictionary::reflect_Method_klass(); 1420 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1421 objArrayHandle h_result (THREAD, r); 1422 1423 // Fill in results backwards 1424 { 1425 // First the non-static public methods 1426 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1427 methodHandle m (THREAD, st.method()); 1428 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) { 1429 oop method = new_method(m, false, false, CHECK_NULL); 1430 if (method == NULL) { 1431 return NULL; 1432 } else { 1433 h_result->obj_at_put(--count, method); 1434 } 1435 } 1436 } 1437 } 1438 { 1439 // Then the static public methods 1440 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) { 1441 methodHandle m (THREAD, st.method()); 1442 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) { 1443 oop method = new_method(m, false, false, CHECK_NULL); 1444 if (method == NULL) { 1445 return NULL; 1446 } else { 1447 h_result->obj_at_put(--count, method); 1448 } 1449 } 1450 } 1451 } 1452 1453 assert(count == 0, "just checking"); 1454 return h_result(); 1455 } 1456 1457 case MEMBER_DECLARED: 1458 { 1459 // Count all methods 1460 int count = 0; 1461 { 1462 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) { 1463 methodOop m = st.method(); 1464 if (!m->is_initializer()) { 1465 count++; 1466 } 1467 } 1468 } 1469 // Allocate result 1470 klassOop klass = SystemDictionary::reflect_Method_klass(); 1471 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1472 objArrayHandle h_result (THREAD, r); 1473 1474 // Fill in results backwards 1475 { 1476 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1477 methodHandle m (THREAD, st.method()); 1478 if (!m->is_initializer()) { 1479 oop method = new_method(m, false, false, CHECK_NULL); 1480 if (method == NULL) { 1481 return NULL; 1482 } else { 1483 h_result->obj_at_put(--count, method); 1484 } 1485 } 1486 } 1487 } 1488 assert(count == 0, "just checking"); 1489 return h_result(); 1490 } 1491 } 1492 ShouldNotReachHere(); 1493 return NULL; 1494} 1495 1496 1497oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) { 1498 1499 // Exclude primitive, interface and array types 1500 bool prim = java_lang_Class::is_primitive(mirror); 1501 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror)); 1502 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL; 1503 1504 // Must be instance klass 1505 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror)); 1506 1507 // Ensure klass is linked (need not be initialized) 1508 h_k->link_class(CHECK_NULL); 1509 1510 bool local_only = (which == MEMBER_DECLARED); 1511 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1512 methodHandle m(THREAD, st.method()); 1513 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1514 symbolHandle signature(THREAD, m->signature()); 1515 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1516 if (parameter_match) { 1517 return new_constructor(m, THREAD); 1518 } 1519 } 1520 } 1521 1522 return NULL; 1523} 1524 1525 1526objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) { 1527 // Exclude primitive, interface and array types 1528 bool prim = java_lang_Class::is_primitive(mirror); 1529 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror)); 1530 if (prim || k->is_interface() || k->oop_is_array()) { 1531 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array 1532 } 1533 1534 // Must be instanceKlass at this point 1535 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror)); 1536 1537 // Ensure klass is linked (need not be initialized) 1538 h_k->link_class(CHECK_NULL); 1539 1540 bool local_only = (which == MEMBER_DECLARED); 1541 int count = 0; 1542 { 1543 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1544 methodOop m = st.method(); 1545 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1546 count++; 1547 } 1548 } 1549 } 1550 1551 // Allocate result 1552 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1553 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1554 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1555 objArrayHandle h_result (THREAD, r); 1556 1557 // Fill in results backwards 1558 { 1559 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1560 methodHandle m (THREAD, st.method()); 1561 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1562 oop constr = new_constructor(m, CHECK_NULL); 1563 if (constr == NULL) { 1564 return NULL; 1565 } else { 1566 h_result->obj_at_put(--count, constr); 1567 } 1568 } 1569 } 1570 assert(count == 0, "just checking"); 1571 } 1572 return h_result(); 1573} 1574 1575 1576// This would be nicer if, say, java.lang.reflect.Method was a subclass 1577// of java.lang.reflect.Constructor 1578 1579oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1580 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1581 int slot = java_lang_reflect_Method::slot(method_mirror); 1582 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1583 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1584 1585 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1586 BasicType rtype; 1587 if (java_lang_Class::is_primitive(return_type_mirror)) { 1588 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1589 } else { 1590 rtype = T_OBJECT; 1591 } 1592 1593 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1594 methodOop m = klass->method_with_idnum(slot); 1595 if (m == NULL) { 1596 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1597 } 1598 methodHandle method(THREAD, m); 1599 1600 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1601} 1602 1603 1604oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1605 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1606 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1607 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1608 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1609 1610 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1611 methodOop m = klass->method_with_idnum(slot); 1612 if (m == NULL) { 1613 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1614 } 1615 methodHandle method(THREAD, m); 1616 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1617 1618 // Make sure klass gets initialize 1619 klass->initialize(CHECK_NULL); 1620 1621 // Create new instance (the receiver) 1622 klass->check_valid_for_instantiation(false, CHECK_NULL); 1623 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1624 1625 // Ignore result from call and return receiver 1626 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1627 return receiver(); 1628} 1629 1630 1631#endif /* SUPPORT_OLD_REFLECTION */ 1632