1 /* 2 * Copyright (c) 1997, 2010, 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/symbolTable.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.hpp" 38 #include "prims/jvm.h" 39 #include "prims/methodHandleWalk.hpp" 40 #include "runtime/arguments.hpp" 41 #include "runtime/handles.inline.hpp" 42 #include "runtime/javaCalls.hpp" 43 #include "runtime/reflection.hpp" 44 #include "runtime/reflectionUtils.hpp" 45 #include "runtime/signature.hpp" 46 #include "runtime/vframe.hpp" 47 48 #define JAVA_1_5_VERSION 49 49 50 static void trace_class_resolution(klassOop to_class) { 51 ResourceMark rm; 52 int line_number = -1; 53 const char * source_file = NULL; 54 klassOop caller = NULL; 55 JavaThread* jthread = JavaThread::current(); 56 if (jthread->has_last_Java_frame()) { 57 vframeStream vfst(jthread); 58 // skip over any frames belonging to java.lang.Class 59 while (!vfst.at_end() && 60 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) { 61 vfst.next(); 62 } 63 if (!vfst.at_end()) { 64 // this frame is a likely suspect 65 caller = vfst.method()->method_holder(); 66 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 67 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); 68 if (s != NULL) { 69 source_file = s->as_C_string(); 70 } 71 } 72 } 73 if (caller != NULL) { 74 const char * from = Klass::cast(caller)->external_name(); 75 const char * to = Klass::cast(to_class)->external_name(); 76 // print in a single call to reduce interleaving between threads 77 if (source_file != NULL) { 78 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); 79 } else { 80 tty->print("RESOLVE %s %s (reflection)\n", from, to); 81 } 82 } 83 } 84 85 86 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 87 if (type == T_VOID) { 88 return NULL; 89 } 90 if (type == T_OBJECT || type == T_ARRAY) { 91 // regular objects are not boxed 92 return (oop) value->l; 93 } 94 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 95 if (result == NULL) { 96 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 97 } 98 return result; 99 } 100 101 102 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 103 if (box == NULL) { 104 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 105 } 106 return java_lang_boxing_object::get_value(box, value); 107 } 108 109 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 110 // Note: box is really the unboxed oop. It might even be a Short, etc.! 111 value->l = (jobject) box; 112 return T_OBJECT; 113 } 114 115 116 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 117 assert(wide_type != current_type, "widen should not be called with identical types"); 118 switch (wide_type) { 119 case T_BOOLEAN: 120 case T_BYTE: 121 case T_CHAR: 122 break; // fail 123 case T_SHORT: 124 switch (current_type) { 125 case T_BYTE: 126 value->s = (jshort) value->b; 127 return; 128 } 129 break; // fail 130 case T_INT: 131 switch (current_type) { 132 case T_BYTE: 133 value->i = (jint) value->b; 134 return; 135 case T_CHAR: 136 value->i = (jint) value->c; 137 return; 138 case T_SHORT: 139 value->i = (jint) value->s; 140 return; 141 } 142 break; // fail 143 case T_LONG: 144 switch (current_type) { 145 case T_BYTE: 146 value->j = (jlong) value->b; 147 return; 148 case T_CHAR: 149 value->j = (jlong) value->c; 150 return; 151 case T_SHORT: 152 value->j = (jlong) value->s; 153 return; 154 case T_INT: 155 value->j = (jlong) value->i; 156 return; 157 } 158 break; // fail 159 case T_FLOAT: 160 switch (current_type) { 161 case T_BYTE: 162 value->f = (jfloat) value->b; 163 return; 164 case T_CHAR: 165 value->f = (jfloat) value->c; 166 return; 167 case T_SHORT: 168 value->f = (jfloat) value->s; 169 return; 170 case T_INT: 171 value->f = (jfloat) value->i; 172 return; 173 case T_LONG: 174 value->f = (jfloat) value->j; 175 return; 176 } 177 break; // fail 178 case T_DOUBLE: 179 switch (current_type) { 180 case T_BYTE: 181 value->d = (jdouble) value->b; 182 return; 183 case T_CHAR: 184 value->d = (jdouble) value->c; 185 return; 186 case T_SHORT: 187 value->d = (jdouble) value->s; 188 return; 189 case T_INT: 190 value->d = (jdouble) value->i; 191 return; 192 case T_FLOAT: 193 value->d = (jdouble) value->f; 194 return; 195 case T_LONG: 196 value->d = (jdouble) value->j; 197 return; 198 } 199 break; // fail 200 default: 201 break; // fail 202 } 203 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 204 } 205 206 207 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 208 if (!a->is_within_bounds(index)) { 209 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 210 } 211 if (a->is_objArray()) { 212 value->l = (jobject) objArrayOop(a)->obj_at(index); 213 return T_OBJECT; 214 } else { 215 assert(a->is_typeArray(), "just checking"); 216 BasicType type = typeArrayKlass::cast(a->klass())->element_type(); 217 switch (type) { 218 case T_BOOLEAN: 219 value->z = typeArrayOop(a)->bool_at(index); 220 break; 221 case T_CHAR: 222 value->c = typeArrayOop(a)->char_at(index); 223 break; 224 case T_FLOAT: 225 value->f = typeArrayOop(a)->float_at(index); 226 break; 227 case T_DOUBLE: 228 value->d = typeArrayOop(a)->double_at(index); 229 break; 230 case T_BYTE: 231 value->b = typeArrayOop(a)->byte_at(index); 232 break; 233 case T_SHORT: 234 value->s = typeArrayOop(a)->short_at(index); 235 break; 236 case T_INT: 237 value->i = typeArrayOop(a)->int_at(index); 238 break; 239 case T_LONG: 240 value->j = typeArrayOop(a)->long_at(index); 241 break; 242 default: 243 return T_ILLEGAL; 244 } 245 return type; 246 } 247 } 248 249 250 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 251 if (!a->is_within_bounds(index)) { 252 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 253 } 254 if (a->is_objArray()) { 255 if (value_type == T_OBJECT) { 256 oop obj = (oop) value->l; 257 if (obj != NULL) { 258 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass(); 259 if (!obj->is_a(element_klass)) { 260 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 261 } 262 } 263 objArrayOop(a)->obj_at_put(index, obj); 264 } 265 } else { 266 assert(a->is_typeArray(), "just checking"); 267 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type(); 268 if (array_type != value_type) { 269 // The widen operation can potentially throw an exception, but cannot block, 270 // so typeArrayOop a is safe if the call succeeds. 271 widen(value, value_type, array_type, CHECK); 272 } 273 switch (array_type) { 274 case T_BOOLEAN: 275 typeArrayOop(a)->bool_at_put(index, value->z); 276 break; 277 case T_CHAR: 278 typeArrayOop(a)->char_at_put(index, value->c); 279 break; 280 case T_FLOAT: 281 typeArrayOop(a)->float_at_put(index, value->f); 282 break; 283 case T_DOUBLE: 284 typeArrayOop(a)->double_at_put(index, value->d); 285 break; 286 case T_BYTE: 287 typeArrayOop(a)->byte_at_put(index, value->b); 288 break; 289 case T_SHORT: 290 typeArrayOop(a)->short_at_put(index, value->s); 291 break; 292 case T_INT: 293 typeArrayOop(a)->int_at_put(index, value->i); 294 break; 295 case T_LONG: 296 typeArrayOop(a)->long_at_put(index, value->j); 297 break; 298 default: 299 THROW(vmSymbols::java_lang_IllegalArgumentException()); 300 } 301 } 302 } 303 304 305 klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 306 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 307 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 308 if (type == T_VOID) { 309 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 310 } else { 311 return Universe::typeArrayKlassObj(type); 312 } 313 } 314 315 316 oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) { 317 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type(); 318 return Universe::java_mirror(type); 319 } 320 321 322 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 323 if (element_mirror == NULL) { 324 THROW_0(vmSymbols::java_lang_NullPointerException()); 325 } 326 if (length < 0) { 327 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 328 } 329 if (java_lang_Class::is_primitive(element_mirror)) { 330 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 331 return typeArrayKlass::cast(tak)->allocate(length, THREAD); 332 } else { 333 klassOop k = java_lang_Class::as_klassOop(element_mirror); 334 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) { 335 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 336 } 337 return oopFactory::new_objArray(k, length, THREAD); 338 } 339 } 340 341 342 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 343 assert(dim_array->is_typeArray(), "just checking"); 344 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 345 346 if (element_mirror == NULL) { 347 THROW_0(vmSymbols::java_lang_NullPointerException()); 348 } 349 350 int len = dim_array->length(); 351 if (len <= 0 || len > MAX_DIM) { 352 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 353 } 354 355 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 356 for (int i = 0; i < len; i++) { 357 int d = dim_array->int_at(i); 358 if (d < 0) { 359 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 360 } 361 dimensions[i] = d; 362 } 363 364 klassOop klass; 365 int dim = len; 366 if (java_lang_Class::is_primitive(element_mirror)) { 367 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 368 } else { 369 klass = java_lang_Class::as_klassOop(element_mirror); 370 if (Klass::cast(klass)->oop_is_array()) { 371 int k_dim = arrayKlass::cast(klass)->dimension(); 372 if (k_dim + len > MAX_DIM) { 373 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 374 } 375 dim += k_dim; 376 } 377 } 378 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL); 379 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD); 380 assert(obj->is_array(), "just checking"); 381 return arrayOop(obj); 382 } 383 384 385 oop Reflection::array_component_type(oop mirror, TRAPS) { 386 if (java_lang_Class::is_primitive(mirror)) { 387 return NULL; 388 } 389 390 klassOop klass = java_lang_Class::as_klassOop(mirror); 391 if (!Klass::cast(klass)->oop_is_array()) { 392 return NULL; 393 } 394 395 oop result = arrayKlass::cast(klass)->component_mirror(); 396 #ifdef ASSERT 397 oop result2 = NULL; 398 if (arrayKlass::cast(klass)->dimension() == 1) { 399 if (Klass::cast(klass)->oop_is_typeArray()) { 400 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 401 } else { 402 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror(); 403 } 404 } else { 405 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension(); 406 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking"); 407 result2 = Klass::cast(lower_dim)->java_mirror(); 408 } 409 assert(result == result2, "results must be consistent"); 410 #endif //ASSERT 411 return result; 412 } 413 414 415 bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) { 416 // field_class : declaring class 417 // acc : declared field access 418 // target_class : for protected 419 420 // Check if field or method is accessible to client. Throw an 421 // IllegalAccessException and return false if not. 422 423 // The "client" is the class associated with the nearest real frame 424 // getCallerClass already skips Method.invoke frames, so pass 0 in 425 // that case (same as classic). 426 ResourceMark rm(THREAD); 427 assert(THREAD->is_Java_thread(), "sanity check"); 428 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1); 429 430 if (client_class != field_class) { 431 if (!verify_class_access(client_class, field_class, false) 432 || !verify_field_access(client_class, 433 field_class, 434 field_class, 435 acc, 436 false)) { 437 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 438 } 439 } 440 441 // Additional test for protected members: JLS 6.6.2 442 443 if (acc.is_protected()) { 444 if (target_class != client_class) { 445 if (!is_same_class_package(client_class, field_class)) { 446 if (!Klass::cast(target_class)->is_subclass_of(client_class)) { 447 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 448 } 449 } 450 } 451 } 452 453 // Passed all tests 454 return true; 455 } 456 457 458 bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) { 459 // Verify that current_class can access new_class. If the classloader_only 460 // flag is set, we automatically allow any accesses in which current_class 461 // doesn't have a classloader. 462 if ((current_class == NULL) || 463 (current_class == new_class) || 464 (instanceKlass::cast(new_class)->is_public()) || 465 is_same_class_package(current_class, new_class)) { 466 return true; 467 } 468 // New (1.4) reflection implementation. Allow all accesses from 469 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. 470 if ( JDK_Version::is_gte_jdk14x_version() 471 && UseNewReflection 472 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 473 return true; 474 } 475 476 return can_relax_access_check_for(current_class, new_class, classloader_only); 477 } 478 479 static bool under_host_klass(instanceKlass* ik, klassOop host_klass) { 480 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 481 for (;;) { 482 klassOop hc = (klassOop) ik->host_klass(); 483 if (hc == NULL) return false; 484 if (hc == host_klass) return true; 485 ik = instanceKlass::cast(hc); 486 487 // There's no way to make a host class loop short of patching memory. 488 // Therefore there cannot be a loop here unles there's another bug. 489 // Still, let's check for it. 490 assert(--inf_loop_check > 0, "no host_klass loop"); 491 } 492 } 493 494 bool Reflection::can_relax_access_check_for( 495 klassOop accessor, klassOop accessee, bool classloader_only) { 496 instanceKlass* accessor_ik = instanceKlass::cast(accessor); 497 instanceKlass* accessee_ik = instanceKlass::cast(accessee); 498 499 // If either is on the other's host_klass chain, access is OK, 500 // because one is inside the other. 501 if (under_host_klass(accessor_ik, accessee) || 502 under_host_klass(accessee_ik, accessor)) 503 return true; 504 505 // Adapter frames can access anything. 506 if (MethodHandleCompiler::klass_is_method_handle_adapter_holder(accessor)) 507 // This is an internal adapter frame from the MethodHandleCompiler. 508 return true; 509 510 if (RelaxAccessControlCheck || 511 (accessor_ik->major_version() < JAVA_1_5_VERSION && 512 accessee_ik->major_version() < JAVA_1_5_VERSION)) { 513 return classloader_only && 514 Verifier::relax_verify_for(accessor_ik->class_loader()) && 515 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 516 accessor_ik->class_loader() == accessee_ik->class_loader(); 517 } else { 518 return false; 519 } 520 } 521 522 bool Reflection::verify_field_access(klassOop current_class, 523 klassOop resolved_class, 524 klassOop field_class, 525 AccessFlags access, 526 bool classloader_only, 527 bool protected_restriction) { 528 // Verify that current_class can access a field of field_class, where that 529 // field's access bits are "access". We assume that we've already verified 530 // that current_class can access field_class. 531 // 532 // If the classloader_only flag is set, we automatically allow any accesses 533 // in which current_class doesn't have a classloader. 534 // 535 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 536 // need this distinction (e.g. if all we have is the runtime type, or during 537 // class file parsing when we only care about the static type); in that case 538 // callers should ensure that resolved_class == field_class. 539 // 540 if ((current_class == NULL) || 541 (current_class == field_class) || 542 access.is_public()) { 543 return true; 544 } 545 546 if (access.is_protected()) { 547 if (!protected_restriction) { 548 // See if current_class is a subclass of field_class 549 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 550 if (access.is_static() || // static fields are ok, see 6622385 551 current_class == resolved_class || 552 field_class == resolved_class || 553 Klass::cast(current_class)->is_subclass_of(resolved_class) || 554 Klass::cast(resolved_class)->is_subclass_of(current_class)) { 555 return true; 556 } 557 } 558 } 559 } 560 561 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 562 return true; 563 } 564 565 // New (1.4) reflection implementation. Allow all accesses from 566 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. 567 if ( JDK_Version::is_gte_jdk14x_version() 568 && UseNewReflection 569 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 570 return true; 571 } 572 573 return can_relax_access_check_for( 574 current_class, field_class, classloader_only); 575 } 576 577 578 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) { 579 return instanceKlass::cast(class1)->is_same_class_package(class2); 580 } 581 582 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) { 583 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD); 584 } 585 586 587 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 588 // throw an incompatible class change exception 589 // If inner_is_member, require the inner to be a member of the outer. 590 // If !inner_is_member, require the inner to be anonymous (a non-member). 591 // Caller is responsible for figuring out in advance which case must be true. 592 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 593 bool inner_is_member, TRAPS) { 594 const int inner_class_info_index = 0; 595 const int outer_class_info_index = 1; 596 597 typeArrayHandle icls (THREAD, outer->inner_classes()); 598 constantPoolHandle cp (THREAD, outer->constants()); 599 for(int i = 0; i < icls->length(); i += 4) { 600 int ioff = icls->ushort_at(i + inner_class_info_index); 601 int ooff = icls->ushort_at(i + outer_class_info_index); 602 603 if (inner_is_member && ioff != 0 && ooff != 0) { 604 klassOop o = cp->klass_at(ooff, CHECK); 605 if (o == outer()) { 606 klassOop i = cp->klass_at(ioff, CHECK); 607 if (i == inner()) { 608 return; 609 } 610 } 611 } 612 if (!inner_is_member && ioff != 0 && ooff == 0 && 613 cp->klass_name_at_matches(inner, ioff)) { 614 klassOop i = cp->klass_at(ioff, CHECK); 615 if (i == inner()) { 616 return; 617 } 618 } 619 } 620 621 // 'inner' not declared as an inner klass in outer 622 ResourceMark rm(THREAD); 623 Exceptions::fthrow( 624 THREAD_AND_LOCATION, 625 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), 626 "%s and %s disagree on InnerClasses attribute", 627 outer->external_name(), 628 inner->external_name() 629 ); 630 } 631 632 // Utility method converting a single SignatureStream element into java.lang.Class instance 633 634 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 635 switch (ss->type()) { 636 default: 637 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 638 return java_lang_Class::primitive_mirror(ss->type()); 639 case T_OBJECT: 640 case T_ARRAY: 641 symbolOop name = ss->as_symbol(CHECK_NULL); 642 oop loader = instanceKlass::cast(method->method_holder())->class_loader(); 643 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 644 klassOop k = SystemDictionary::resolve_or_fail( 645 symbolHandle(THREAD, name), 646 Handle(THREAD, loader), 647 Handle(THREAD, protection_domain), 648 true, CHECK_NULL); 649 if (TraceClassResolution) { 650 trace_class_resolution(k); 651 } 652 return k->klass_part()->java_mirror(); 653 }; 654 } 655 656 657 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 658 // Allocate array holding parameter types (java.lang.Class instances) 659 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 660 objArrayHandle mirrors (THREAD, m); 661 int index = 0; 662 // Collect parameter types 663 symbolHandle signature (THREAD, method->signature()); 664 SignatureStream ss(signature); 665 while (!ss.at_return_type()) { 666 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 667 mirrors->obj_at_put(index++, mirror); 668 ss.next(); 669 } 670 assert(index == parameter_count, "invalid parameter count"); 671 if (return_type != NULL) { 672 // Collect return type as well 673 assert(ss.at_return_type(), "return type should be present"); 674 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 675 } 676 return mirrors; 677 } 678 679 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 680 return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); 681 } 682 683 684 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) { 685 // Basic types 686 BasicType type = vmSymbols::signature_type(signature()); 687 if (type != T_OBJECT) { 688 return Handle(THREAD, Universe::java_mirror(type)); 689 } 690 691 oop loader = instanceKlass::cast(k())->class_loader(); 692 oop protection_domain = Klass::cast(k())->protection_domain(); 693 klassOop result = SystemDictionary::resolve_or_fail(signature, 694 Handle(THREAD, loader), 695 Handle(THREAD, protection_domain), 696 true, CHECK_(Handle())); 697 698 if (TraceClassResolution) { 699 trace_class_resolution(result); 700 } 701 702 oop nt = Klass::cast(result)->java_mirror(); 703 return Handle(THREAD, nt); 704 } 705 706 707 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) { 708 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert. 709 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 710 assert(!method()->is_initializer() || 711 (for_constant_pool_access && method()->is_static()) || 712 (method()->name() == vmSymbols::class_initializer_name() 713 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead"); 714 instanceKlassHandle holder (THREAD, method->method_holder()); 715 int slot = method->method_idnum(); 716 717 symbolHandle signature (THREAD, method->signature()); 718 int parameter_count = ArgumentCount(signature).size(); 719 oop return_type_oop = NULL; 720 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 721 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 722 723 Handle return_type(THREAD, return_type_oop); 724 725 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 726 727 if (exception_types.is_null()) return NULL; 728 729 symbolHandle method_name(THREAD, method->name()); 730 Handle name; 731 if (intern_name) { 732 // intern_name is only true with UseNewReflection 733 oop name_oop = StringTable::intern(method_name(), CHECK_NULL); 734 name = Handle(THREAD, name_oop); 735 } else { 736 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL); 737 } 738 if (name.is_null()) return NULL; 739 740 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 741 742 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 743 744 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 745 java_lang_reflect_Method::set_slot(mh(), slot); 746 java_lang_reflect_Method::set_name(mh(), name()); 747 java_lang_reflect_Method::set_return_type(mh(), return_type()); 748 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 749 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 750 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 751 java_lang_reflect_Method::set_override(mh(), false); 752 if (java_lang_reflect_Method::has_signature_field() && 753 method->generic_signature() != NULL) { 754 symbolHandle gs(THREAD, method->generic_signature()); 755 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 756 java_lang_reflect_Method::set_signature(mh(), sig()); 757 } 758 if (java_lang_reflect_Method::has_annotations_field()) { 759 java_lang_reflect_Method::set_annotations(mh(), method->annotations()); 760 } 761 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 762 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations()); 763 } 764 if (java_lang_reflect_Method::has_annotation_default_field()) { 765 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default()); 766 } 767 return mh(); 768 } 769 770 771 oop Reflection::new_constructor(methodHandle method, TRAPS) { 772 assert(method()->is_initializer(), "should call new_method instead"); 773 774 instanceKlassHandle holder (THREAD, method->method_holder()); 775 int slot = method->method_idnum(); 776 777 symbolHandle signature (THREAD, method->signature()); 778 int parameter_count = ArgumentCount(signature).size(); 779 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 780 if (parameter_types.is_null()) return NULL; 781 782 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 783 if (exception_types.is_null()) return NULL; 784 785 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 786 787 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 788 789 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 790 java_lang_reflect_Constructor::set_slot(ch(), slot); 791 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 792 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 793 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 794 java_lang_reflect_Constructor::set_override(ch(), false); 795 if (java_lang_reflect_Constructor::has_signature_field() && 796 method->generic_signature() != NULL) { 797 symbolHandle gs(THREAD, method->generic_signature()); 798 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 799 java_lang_reflect_Constructor::set_signature(ch(), sig()); 800 } 801 if (java_lang_reflect_Constructor::has_annotations_field()) { 802 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations()); 803 } 804 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 805 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations()); 806 } 807 return ch(); 808 } 809 810 811 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) { 812 symbolHandle field_name(THREAD, fd->name()); 813 Handle name; 814 if (intern_name) { 815 // intern_name is only true with UseNewReflection 816 oop name_oop = StringTable::intern(field_name(), CHECK_NULL); 817 name = Handle(THREAD, name_oop); 818 } else { 819 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 820 } 821 symbolHandle signature (THREAD, fd->signature()); 822 KlassHandle holder (THREAD, fd->field_holder()); 823 Handle type = new_type(signature, holder, CHECK_NULL); 824 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 825 826 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror()); 827 java_lang_reflect_Field::set_slot(rh(), fd->index()); 828 java_lang_reflect_Field::set_name(rh(), name()); 829 java_lang_reflect_Field::set_type(rh(), type()); 830 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 831 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 832 java_lang_reflect_Field::set_override(rh(), false); 833 if (java_lang_reflect_Field::has_signature_field() && 834 fd->generic_signature() != NULL) { 835 symbolHandle gs(THREAD, fd->generic_signature()); 836 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 837 java_lang_reflect_Field::set_signature(rh(), sig()); 838 } 839 if (java_lang_reflect_Field::has_annotations_field()) { 840 java_lang_reflect_Field::set_annotations(rh(), fd->annotations()); 841 } 842 return rh(); 843 } 844 845 846 //--------------------------------------------------------------------------- 847 // 848 // Supporting routines for old native code-based reflection (pre-JDK 1.4). 849 // 850 // See reflection.hpp for details. 851 // 852 //--------------------------------------------------------------------------- 853 854 #ifdef SUPPORT_OLD_REFLECTION 855 856 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 857 KlassHandle recv_klass, Handle receiver, TRAPS) { 858 assert(!method.is_null() , "method should not be null"); 859 860 CallInfo info; 861 symbolHandle signature (THREAD, method->signature()); 862 symbolHandle name (THREAD, method->name()); 863 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, 864 name, signature, 865 KlassHandle(), false, true, 866 CHECK_(methodHandle())); 867 return info.selected_method(); 868 } 869 870 871 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 872 Handle receiver, bool override, objArrayHandle ptypes, 873 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 874 ResourceMark rm(THREAD); 875 876 methodHandle method; // actual method to invoke 877 KlassHandle target_klass; // target klass, receiver's klass for non-static 878 879 // Ensure klass is initialized 880 klass->initialize(CHECK_NULL); 881 882 bool is_static = reflected_method->is_static(); 883 if (is_static) { 884 // ignore receiver argument 885 method = reflected_method; 886 target_klass = klass; 887 } else { 888 // check for null receiver 889 if (receiver.is_null()) { 890 THROW_0(vmSymbols::java_lang_NullPointerException()); 891 } 892 // Check class of receiver against class declaring method 893 if (!receiver->is_a(klass())) { 894 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 895 } 896 // target klass is receiver's klass 897 target_klass = KlassHandle(THREAD, receiver->klass()); 898 // no need to resolve if method is private or <init> 899 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 900 method = reflected_method; 901 } else { 902 // resolve based on the receiver 903 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) { 904 // resolve interface call 905 if (ReflectionWrapResolutionErrors) { 906 // new default: 6531596 907 // Match resolution errors with those thrown due to reflection inlining 908 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 909 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 910 if (HAS_PENDING_EXCEPTION) { 911 // Method resolution threw an exception; wrap it in an InvocationTargetException 912 oop resolution_exception = PENDING_EXCEPTION; 913 CLEAR_PENDING_EXCEPTION; 914 JavaCallArguments args(Handle(THREAD, resolution_exception)); 915 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 916 vmSymbolHandles::throwable_void_signature(), 917 &args); 918 } 919 } else { 920 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL)); 921 } 922 } else { 923 // if the method can be overridden, we resolve using the vtable index. 924 int index = reflected_method->vtable_index(); 925 method = reflected_method; 926 if (index != methodOopDesc::nonvirtual_vtable_index) { 927 // target_klass might be an arrayKlassOop but all vtables start at 928 // the same place. The cast is to avoid virtual call and assertion. 929 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part(); 930 method = methodHandle(THREAD, inst->method_at_vtable(index)); 931 } 932 if (!method.is_null()) { 933 // Check for abstract methods as well 934 if (method->is_abstract()) { 935 // new default: 6531596 936 if (ReflectionWrapResolutionErrors) { 937 ResourceMark rm(THREAD); 938 Handle h_origexception = Exceptions::new_exception(THREAD, 939 vmSymbols::java_lang_AbstractMethodError(), 940 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 941 method->name(), 942 method->signature())); 943 JavaCallArguments args(h_origexception); 944 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 945 vmSymbolHandles::throwable_void_signature(), 946 &args); 947 } else { 948 ResourceMark rm(THREAD); 949 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(), 950 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 951 method->name(), 952 method->signature())); 953 } 954 } 955 } 956 } 957 } 958 } 959 960 // I believe this is a ShouldNotGetHere case which requires 961 // an internal vtable bug. If you ever get this please let Karen know. 962 if (method.is_null()) { 963 ResourceMark rm(THREAD); 964 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 965 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()), 966 reflected_method->name(), 967 reflected_method->signature())); 968 } 969 970 // In the JDK 1.4 reflection implementation, the security check is 971 // done at the Java level 972 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) { 973 974 // Access checking (unless overridden by Method) 975 if (!override) { 976 if (!(klass->is_public() && reflected_method->is_public())) { 977 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL); 978 if (!access) { 979 return NULL; // exception 980 } 981 } 982 } 983 984 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection) 985 986 assert(ptypes->is_objArray(), "just checking"); 987 int args_len = args.is_null() ? 0 : args->length(); 988 // Check number of arguments 989 if (ptypes->length() != args_len) { 990 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 991 } 992 993 // Create object to contain parameters for the JavaCall 994 JavaCallArguments java_args(method->size_of_parameters()); 995 996 if (!is_static) { 997 java_args.push_oop(receiver); 998 } 999 1000 for (int i = 0; i < args_len; i++) { 1001 oop type_mirror = ptypes->obj_at(i); 1002 oop arg = args->obj_at(i); 1003 if (java_lang_Class::is_primitive(type_mirror)) { 1004 jvalue value; 1005 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1006 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 1007 if (ptype != atype) { 1008 widen(&value, atype, ptype, CHECK_NULL); 1009 } 1010 switch (ptype) { 1011 case T_BOOLEAN: java_args.push_int(value.z); break; 1012 case T_CHAR: java_args.push_int(value.c); break; 1013 case T_BYTE: java_args.push_int(value.b); break; 1014 case T_SHORT: java_args.push_int(value.s); break; 1015 case T_INT: java_args.push_int(value.i); break; 1016 case T_LONG: java_args.push_long(value.j); break; 1017 case T_FLOAT: java_args.push_float(value.f); break; 1018 case T_DOUBLE: java_args.push_double(value.d); break; 1019 default: 1020 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1021 } 1022 } else { 1023 if (arg != NULL) { 1024 klassOop k = java_lang_Class::as_klassOop(type_mirror); 1025 if (!arg->is_a(k)) { 1026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1027 } 1028 } 1029 Handle arg_handle(THREAD, arg); // Create handle for argument 1030 java_args.push_oop(arg_handle); // Push handle 1031 } 1032 } 1033 1034 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 1035 1036 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1037 // oop (i.e., NOT as an handle) 1038 JavaValue result(rtype); 1039 JavaCalls::call(&result, method, &java_args, THREAD); 1040 1041 if (HAS_PENDING_EXCEPTION) { 1042 // Method threw an exception; wrap it in an InvocationTargetException 1043 oop target_exception = PENDING_EXCEPTION; 1044 CLEAR_PENDING_EXCEPTION; 1045 JavaCallArguments args(Handle(THREAD, target_exception)); 1046 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(), 1047 vmSymbolHandles::throwable_void_signature(), 1048 &args); 1049 } else { 1050 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) 1051 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1052 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1053 } 1054 } 1055 1056 1057 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1058 switch (narrow_type) { 1059 case T_BOOLEAN: 1060 value->z = (jboolean) value->i; 1061 return; 1062 case T_BYTE: 1063 value->b = (jbyte) value->i; 1064 return; 1065 case T_CHAR: 1066 value->c = (jchar) value->i; 1067 return; 1068 case T_SHORT: 1069 value->s = (jshort) value->i; 1070 return; 1071 default: 1072 break; // fail 1073 } 1074 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1075 } 1076 1077 1078 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1079 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1080 return java_lang_Class::primitive_type(basic_type_mirror); 1081 } 1082 1083 1084 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) { 1085 int types_len = types.is_null() ? 0 : types->length(); 1086 if (types_len != parameter_count) return false; 1087 if (parameter_count > 0) { 1088 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false); 1089 for (int index = 0; index < parameter_count; index++) { 1090 if (types->obj_at(index) != method_types->obj_at(index)) { 1091 return false; 1092 } 1093 } 1094 } 1095 return true; 1096 } 1097 1098 1099 oop Reflection::new_field(FieldStream* st, TRAPS) { 1100 symbolHandle field_name(THREAD, st->name()); 1101 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 1102 symbolHandle signature(THREAD, st->signature()); 1103 Handle type = new_type(signature, st->klass(), CHECK_NULL); 1104 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 1105 oop result = rh(); 1106 1107 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror()); 1108 java_lang_reflect_Field::set_slot(result, st->index()); 1109 java_lang_reflect_Field::set_name(result, name()); 1110 java_lang_reflect_Field::set_type(result, type()); 1111 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 1112 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 1113 java_lang_reflect_Field::set_override(result, false); 1114 return result; 1115 } 1116 1117 1118 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) { 1119 if (field_mirror.is_null()) { 1120 THROW_(vmSymbols::java_lang_NullPointerException(), false); 1121 } 1122 1123 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror()))); 1124 int slot = java_lang_reflect_Field::slot(field_mirror()); 1125 1126 // Ensure klass is initialized 1127 klass->initialize(CHECK_false); 1128 fd->initialize(klass(), slot); 1129 1130 bool is_static = fd->is_static(); 1131 KlassHandle receiver_klass; 1132 1133 if (is_static) { 1134 receiver = KlassHandle(THREAD, klass()); 1135 receiver_klass = klass; 1136 } else { 1137 // Check object is a non-null instance of declaring class 1138 if (receiver.is_null()) { 1139 THROW_(vmSymbols::java_lang_NullPointerException(), false); 1140 } 1141 if (!receiver->is_a(klass())) { 1142 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false); 1143 } 1144 receiver_klass = KlassHandle(THREAD, receiver->klass()); 1145 } 1146 1147 // Access checking (unless overridden by Field) 1148 if (!java_lang_reflect_Field::override(field_mirror())) { 1149 if (!(klass->is_public() && fd->is_public())) { 1150 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false); 1151 if (!access_check) { 1152 return false; // exception 1153 } 1154 } 1155 } 1156 1157 if (check_final && fd->is_final()) { 1158 // In 1.3 we always throw an error when attempting to set a final field. 1159 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true). 1160 // We currently maintain backwards compatibility. See bug 4250960. 1161 bool strict_final_check = !JDK_Version::is_jdk12x_version(); 1162 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) { 1163 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false); 1164 } 1165 } 1166 return true; 1167 } 1168 1169 1170 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) { 1171 BasicType field_type = fd->field_type(); 1172 int offset = fd->offset(); 1173 switch (field_type) { 1174 case T_BOOLEAN: 1175 value->z = receiver->bool_field(offset); 1176 break; 1177 case T_CHAR: 1178 value->c = receiver->char_field(offset); 1179 break; 1180 case T_FLOAT: 1181 value->f = receiver->float_field(offset); 1182 break; 1183 case T_DOUBLE: 1184 value->d = receiver->double_field(offset); 1185 break; 1186 case T_BYTE: 1187 value->b = receiver->byte_field(offset); 1188 break; 1189 case T_SHORT: 1190 value->s = receiver->short_field(offset); 1191 break; 1192 case T_INT: 1193 value->i = receiver->int_field(offset); 1194 break; 1195 case T_LONG: 1196 value->j = receiver->long_field(offset); 1197 break; 1198 case T_OBJECT: 1199 case T_ARRAY: 1200 value->l = (jobject) receiver->obj_field(offset); 1201 break; 1202 default: 1203 return T_ILLEGAL; 1204 } 1205 return field_type; 1206 } 1207 1208 1209 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) { 1210 BasicType field_type = fd->field_type(); 1211 if (field_type != value_type) { 1212 widen(value, value_type, field_type, CHECK); 1213 } 1214 1215 int offset = fd->offset(); 1216 switch (field_type) { 1217 case T_BOOLEAN: 1218 receiver->bool_field_put(offset, value->z); 1219 break; 1220 case T_CHAR: 1221 receiver->char_field_put(offset, value->c); 1222 break; 1223 case T_FLOAT: 1224 receiver->float_field_put(offset, value->f); 1225 break; 1226 case T_DOUBLE: 1227 receiver->double_field_put(offset, value->d); 1228 break; 1229 case T_BYTE: 1230 receiver->byte_field_put(offset, value->b); 1231 break; 1232 case T_SHORT: 1233 receiver->short_field_put(offset, value->s); 1234 break; 1235 case T_INT: 1236 receiver->int_field_put(offset, value->i); 1237 break; 1238 case T_LONG: 1239 receiver->long_field_put(offset, value->j); 1240 break; 1241 case T_OBJECT: 1242 case T_ARRAY: { 1243 Handle obj(THREAD, (oop) value->l); 1244 if (obj.not_null()) { 1245 symbolHandle signature(THREAD, fd->signature()); 1246 Handle loader (THREAD, fd->loader()); 1247 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain()); 1248 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block 1249 if (!obj->is_a(k)) { 1250 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch"); 1251 } 1252 } 1253 receiver->obj_field_put(offset, obj()); 1254 break; 1255 } 1256 default: 1257 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch"); 1258 } 1259 } 1260 1261 1262 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) { 1263 // Exclude primitive types and array types 1264 if (java_lang_Class::is_primitive(mirror)) return NULL; 1265 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL; 1266 1267 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror)); 1268 bool local_fields_only = (which == DECLARED); 1269 1270 // Ensure class is linked 1271 k->link_class(CHECK_NULL); 1272 1273 // Search class and interface fields 1274 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1275 if (st.name() == field_name) { 1276 if (local_fields_only || st.access_flags().is_public()) { 1277 return new_field(&st, THREAD); 1278 } 1279 } 1280 } 1281 1282 return NULL; 1283 } 1284 1285 1286 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) { 1287 // Exclude primitive types and array types 1288 if (java_lang_Class::is_primitive(mirror) 1289 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1290 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1291 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1292 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array 1293 } 1294 1295 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror)); 1296 1297 // Ensure class is linked 1298 k->link_class(CHECK_NULL); 1299 1300 bool local_fields_only = (which == DECLARED); 1301 int count = 0; 1302 { // Compute fields count for class and interface fields 1303 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1304 if (local_fields_only || st.access_flags().is_public()) { 1305 count++; 1306 } 1307 } 1308 } 1309 1310 // Allocate result 1311 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1312 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1313 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1314 objArrayHandle result (THREAD, r); 1315 1316 // Fill in results backwards 1317 { 1318 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) { 1319 if (local_fields_only || st.access_flags().is_public()) { 1320 oop field = new_field(&st, CHECK_NULL); 1321 result->obj_at_put(--count, field); 1322 } 1323 } 1324 assert(count == 0, "just checking"); 1325 } 1326 return result(); 1327 } 1328 1329 1330 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) { 1331 if (java_lang_Class::is_primitive(mirror)) return NULL; 1332 klassOop klass = java_lang_Class::as_klassOop(mirror); 1333 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL; 1334 1335 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1336 klass = SystemDictionary::Object_klass(); 1337 } 1338 instanceKlassHandle h_k(THREAD, klass); 1339 1340 // Ensure klass is linked (need not be initialized) 1341 h_k->link_class(CHECK_NULL); 1342 1343 // For interfaces include static initializers under jdk1.2.x (since classic does that) 1344 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface(); 1345 1346 switch (which) { 1347 case MEMBER_PUBLIC: 1348 // First the public non-static methods (works if method holder is an interface) 1349 // Note that we can ignore checks for overridden methods, since we go up the hierarchy. 1350 { 1351 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1352 methodHandle m(THREAD, st.method()); 1353 // For interfaces include static initializers since classic does that! 1354 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) { 1355 symbolHandle signature(THREAD, m->signature()); 1356 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1357 if (parameter_match) { 1358 return new_method(m, false, false, THREAD); 1359 } 1360 } 1361 } 1362 } 1363 // Then the public static methods (works if method holder is an interface) 1364 { 1365 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1366 methodHandle m(THREAD, st.method()); 1367 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) { 1368 symbolHandle signature(THREAD, m->signature()); 1369 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1370 if (parameter_match) { 1371 return new_method(m, false, false, THREAD); 1372 } 1373 } 1374 } 1375 } 1376 break; 1377 case MEMBER_DECLARED: 1378 // All local methods 1379 { 1380 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1381 methodHandle m(THREAD, st.method()); 1382 if (method_name() == m->name() && !m->is_initializer()) { 1383 symbolHandle signature(THREAD, m->signature()); 1384 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1385 if (parameter_match) { 1386 return new_method(m, false, false, THREAD); 1387 } 1388 } 1389 } 1390 } 1391 break; 1392 default: 1393 break; 1394 } 1395 return NULL; 1396 } 1397 1398 1399 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) { 1400 // Exclude primitive types 1401 if (java_lang_Class::is_primitive(mirror) || 1402 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) { 1403 klassOop klass = SystemDictionary::reflect_Method_klass(); 1404 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array 1405 } 1406 1407 klassOop klass = java_lang_Class::as_klassOop(mirror); 1408 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) { 1409 klass = SystemDictionary::Object_klass(); 1410 } 1411 instanceKlassHandle h_k(THREAD, klass); 1412 1413 // Ensure klass is linked (need not be initialized) 1414 h_k->link_class(CHECK_NULL); 1415 1416 // We search the (super)interfaces only if h_k is an interface itself 1417 bool is_interface = h_k->is_interface(); 1418 1419 // For interfaces include static initializers under jdk1.2.x (since classic does that) 1420 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface; 1421 1422 switch (which) { 1423 case MEMBER_PUBLIC: 1424 { 1425 1426 // Count public methods (non-static and static) 1427 int count = 0; 1428 { 1429 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1430 methodOop m = st.method(); 1431 // For interfaces include static initializers since classic does that! 1432 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) { 1433 count++; 1434 } 1435 } 1436 } 1437 1438 // Allocate result 1439 klassOop klass = SystemDictionary::reflect_Method_klass(); 1440 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1441 objArrayHandle h_result (THREAD, r); 1442 1443 // Fill in results backwards 1444 { 1445 // First the non-static public methods 1446 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) { 1447 methodHandle m (THREAD, st.method()); 1448 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) { 1449 oop method = new_method(m, false, false, CHECK_NULL); 1450 if (method == NULL) { 1451 return NULL; 1452 } else { 1453 h_result->obj_at_put(--count, method); 1454 } 1455 } 1456 } 1457 } 1458 { 1459 // Then the static public methods 1460 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) { 1461 methodHandle m (THREAD, st.method()); 1462 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) { 1463 oop method = new_method(m, false, false, CHECK_NULL); 1464 if (method == NULL) { 1465 return NULL; 1466 } else { 1467 h_result->obj_at_put(--count, method); 1468 } 1469 } 1470 } 1471 } 1472 1473 assert(count == 0, "just checking"); 1474 return h_result(); 1475 } 1476 1477 case MEMBER_DECLARED: 1478 { 1479 // Count all methods 1480 int count = 0; 1481 { 1482 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) { 1483 methodOop m = st.method(); 1484 if (!m->is_initializer()) { 1485 count++; 1486 } 1487 } 1488 } 1489 // Allocate result 1490 klassOop klass = SystemDictionary::reflect_Method_klass(); 1491 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1492 objArrayHandle h_result (THREAD, r); 1493 1494 // Fill in results backwards 1495 { 1496 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1497 methodHandle m (THREAD, st.method()); 1498 if (!m->is_initializer()) { 1499 oop method = new_method(m, false, false, CHECK_NULL); 1500 if (method == NULL) { 1501 return NULL; 1502 } else { 1503 h_result->obj_at_put(--count, method); 1504 } 1505 } 1506 } 1507 } 1508 assert(count == 0, "just checking"); 1509 return h_result(); 1510 } 1511 } 1512 ShouldNotReachHere(); 1513 return NULL; 1514 } 1515 1516 1517 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) { 1518 1519 // Exclude primitive, interface and array types 1520 bool prim = java_lang_Class::is_primitive(mirror); 1521 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror)); 1522 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL; 1523 1524 // Must be instance klass 1525 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror)); 1526 1527 // Ensure klass is linked (need not be initialized) 1528 h_k->link_class(CHECK_NULL); 1529 1530 bool local_only = (which == MEMBER_DECLARED); 1531 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1532 methodHandle m(THREAD, st.method()); 1533 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1534 symbolHandle signature(THREAD, m->signature()); 1535 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL); 1536 if (parameter_match) { 1537 return new_constructor(m, THREAD); 1538 } 1539 } 1540 } 1541 1542 return NULL; 1543 } 1544 1545 1546 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) { 1547 // Exclude primitive, interface and array types 1548 bool prim = java_lang_Class::is_primitive(mirror); 1549 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror)); 1550 if (prim || k->is_interface() || k->oop_is_array()) { 1551 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array 1552 } 1553 1554 // Must be instanceKlass at this point 1555 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror)); 1556 1557 // Ensure klass is linked (need not be initialized) 1558 h_k->link_class(CHECK_NULL); 1559 1560 bool local_only = (which == MEMBER_DECLARED); 1561 int count = 0; 1562 { 1563 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1564 methodOop m = st.method(); 1565 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1566 count++; 1567 } 1568 } 1569 } 1570 1571 // Allocate result 1572 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1573 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL); 1574 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL); 1575 objArrayHandle h_result (THREAD, r); 1576 1577 // Fill in results backwards 1578 { 1579 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) { 1580 methodHandle m (THREAD, st.method()); 1581 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) { 1582 oop constr = new_constructor(m, CHECK_NULL); 1583 if (constr == NULL) { 1584 return NULL; 1585 } else { 1586 h_result->obj_at_put(--count, constr); 1587 } 1588 } 1589 } 1590 assert(count == 0, "just checking"); 1591 } 1592 return h_result(); 1593 } 1594 1595 1596 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1597 // of java.lang.reflect.Constructor 1598 1599 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1600 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1601 int slot = java_lang_reflect_Method::slot(method_mirror); 1602 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1603 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1604 1605 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1606 BasicType rtype; 1607 if (java_lang_Class::is_primitive(return_type_mirror)) { 1608 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1609 } else { 1610 rtype = T_OBJECT; 1611 } 1612 1613 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1614 methodOop m = klass->method_with_idnum(slot); 1615 if (m == NULL) { 1616 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1617 } 1618 methodHandle method(THREAD, m); 1619 1620 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1621 } 1622 1623 1624 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1625 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1626 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1627 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1628 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1629 1630 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1631 methodOop m = klass->method_with_idnum(slot); 1632 if (m == NULL) { 1633 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1634 } 1635 methodHandle method(THREAD, m); 1636 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1637 1638 // Make sure klass gets initialize 1639 klass->initialize(CHECK_NULL); 1640 1641 // Create new instance (the receiver) 1642 klass->check_valid_for_instantiation(false, CHECK_NULL); 1643 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1644 1645 // Ignore result from call and return receiver 1646 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1647 return receiver(); 1648 } 1649 1650 1651 #endif /* SUPPORT_OLD_REFLECTION */