1 /* 2 * Copyright (c) 1997, 2011, 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 Symbol* 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 InnerClassesIterator iter(outer); 595 constantPoolHandle cp (THREAD, outer->constants()); 596 for (; !iter.done(); iter.next()) { 597 int ioff = iter.inner_class_info_index(); 598 int ooff = iter.outer_class_info_index(); 599 600 if (inner_is_member && ioff != 0 && ooff != 0) { 601 klassOop o = cp->klass_at(ooff, CHECK); 602 if (o == outer()) { 603 klassOop i = cp->klass_at(ioff, CHECK); 604 if (i == inner()) { 605 return; 606 } 607 } 608 } 609 if (!inner_is_member && ioff != 0 && ooff == 0 && 610 cp->klass_name_at_matches(inner, ioff)) { 611 klassOop i = cp->klass_at(ioff, CHECK); 612 if (i == inner()) { 613 return; 614 } 615 } 616 } 617 618 // 'inner' not declared as an inner klass in outer 619 ResourceMark rm(THREAD); 620 Exceptions::fthrow( 621 THREAD_AND_LOCATION, 622 vmSymbols::java_lang_IncompatibleClassChangeError(), 623 "%s and %s disagree on InnerClasses attribute", 624 outer->external_name(), 625 inner->external_name() 626 ); 627 } 628 629 // Utility method converting a single SignatureStream element into java.lang.Class instance 630 631 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 632 switch (ss->type()) { 633 default: 634 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 635 return java_lang_Class::primitive_mirror(ss->type()); 636 case T_OBJECT: 637 case T_ARRAY: 638 Symbol* name = ss->as_symbol(CHECK_NULL); 639 oop loader = instanceKlass::cast(method->method_holder())->class_loader(); 640 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 641 klassOop k = SystemDictionary::resolve_or_fail( 642 name, 643 Handle(THREAD, loader), 644 Handle(THREAD, protection_domain), 645 true, CHECK_NULL); 646 if (TraceClassResolution) { 647 trace_class_resolution(k); 648 } 649 return k->java_mirror(); 650 }; 651 } 652 653 654 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 655 // Allocate array holding parameter types (java.lang.Class instances) 656 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 657 objArrayHandle mirrors (THREAD, m); 658 int index = 0; 659 // Collect parameter types 660 ResourceMark rm(THREAD); 661 Symbol* signature = method->signature(); 662 SignatureStream ss(signature); 663 while (!ss.at_return_type()) { 664 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 665 mirrors->obj_at_put(index++, mirror); 666 ss.next(); 667 } 668 assert(index == parameter_count, "invalid parameter count"); 669 if (return_type != NULL) { 670 // Collect return type as well 671 assert(ss.at_return_type(), "return type should be present"); 672 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 673 } 674 return mirrors; 675 } 676 677 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 678 return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); 679 } 680 681 682 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) { 683 // Basic types 684 BasicType type = vmSymbols::signature_type(signature); 685 if (type != T_OBJECT) { 686 return Handle(THREAD, Universe::java_mirror(type)); 687 } 688 689 oop loader = instanceKlass::cast(k())->class_loader(); 690 oop protection_domain = Klass::cast(k())->protection_domain(); 691 klassOop result = SystemDictionary::resolve_or_fail(signature, 692 Handle(THREAD, loader), 693 Handle(THREAD, protection_domain), 694 true, CHECK_(Handle())); 695 696 if (TraceClassResolution) { 697 trace_class_resolution(result); 698 } 699 700 oop nt = Klass::cast(result)->java_mirror(); 701 return Handle(THREAD, nt); 702 } 703 704 705 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) { 706 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert. 707 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 708 assert(!method()->is_initializer() || 709 (for_constant_pool_access && method()->is_static()) || 710 (method()->name() == vmSymbols::class_initializer_name() 711 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead"); 712 instanceKlassHandle holder (THREAD, method->method_holder()); 713 int slot = method->method_idnum(); 714 715 Symbol* signature = method->signature(); 716 int parameter_count = ArgumentCount(signature).size(); 717 oop return_type_oop = NULL; 718 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 719 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 720 721 Handle return_type(THREAD, return_type_oop); 722 723 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 724 725 if (exception_types.is_null()) return NULL; 726 727 Symbol* method_name = method->name(); 728 Handle name; 729 if (intern_name) { 730 // intern_name is only true with UseNewReflection 731 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 732 name = Handle(THREAD, name_oop); 733 } else { 734 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL); 735 } 736 if (name == NULL) return NULL; 737 738 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 739 740 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 741 742 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 743 java_lang_reflect_Method::set_slot(mh(), slot); 744 java_lang_reflect_Method::set_name(mh(), name()); 745 java_lang_reflect_Method::set_return_type(mh(), return_type()); 746 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 747 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 748 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 749 java_lang_reflect_Method::set_override(mh(), false); 750 if (java_lang_reflect_Method::has_signature_field() && 751 method->generic_signature() != NULL) { 752 Symbol* gs = method->generic_signature(); 753 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 754 java_lang_reflect_Method::set_signature(mh(), sig()); 755 } 756 if (java_lang_reflect_Method::has_annotations_field()) { 757 java_lang_reflect_Method::set_annotations(mh(), method->annotations()); 758 } 759 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 760 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations()); 761 } 762 if (java_lang_reflect_Method::has_annotation_default_field()) { 763 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default()); 764 } 765 return mh(); 766 } 767 768 769 oop Reflection::new_constructor(methodHandle method, TRAPS) { 770 assert(method()->is_initializer(), "should call new_method instead"); 771 772 instanceKlassHandle holder (THREAD, method->method_holder()); 773 int slot = method->method_idnum(); 774 775 Symbol* signature = method->signature(); 776 int parameter_count = ArgumentCount(signature).size(); 777 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 778 if (parameter_types.is_null()) return NULL; 779 780 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 781 if (exception_types.is_null()) return NULL; 782 783 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 784 785 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 786 787 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 788 java_lang_reflect_Constructor::set_slot(ch(), slot); 789 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 790 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 791 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 792 java_lang_reflect_Constructor::set_override(ch(), false); 793 if (java_lang_reflect_Constructor::has_signature_field() && 794 method->generic_signature() != NULL) { 795 Symbol* gs = method->generic_signature(); 796 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 797 java_lang_reflect_Constructor::set_signature(ch(), sig()); 798 } 799 if (java_lang_reflect_Constructor::has_annotations_field()) { 800 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations()); 801 } 802 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 803 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations()); 804 } 805 return ch(); 806 } 807 808 809 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) { 810 Symbol* field_name = fd->name(); 811 Handle name; 812 if (intern_name) { 813 // intern_name is only true with UseNewReflection 814 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 815 name = Handle(THREAD, name_oop); 816 } else { 817 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 818 } 819 Symbol* signature = fd->signature(); 820 KlassHandle holder (THREAD, fd->field_holder()); 821 Handle type = new_type(signature, holder, CHECK_NULL); 822 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 823 824 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror()); 825 java_lang_reflect_Field::set_slot(rh(), fd->index()); 826 java_lang_reflect_Field::set_name(rh(), name()); 827 java_lang_reflect_Field::set_type(rh(), type()); 828 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 829 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 830 java_lang_reflect_Field::set_override(rh(), false); 831 if (java_lang_reflect_Field::has_signature_field() && 832 fd->has_generic_signature()) { 833 Symbol* gs = fd->generic_signature(); 834 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 835 java_lang_reflect_Field::set_signature(rh(), sig()); 836 } 837 if (java_lang_reflect_Field::has_annotations_field()) { 838 java_lang_reflect_Field::set_annotations(rh(), fd->annotations()); 839 } 840 return rh(); 841 } 842 843 844 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 845 KlassHandle recv_klass, Handle receiver, TRAPS) { 846 assert(!method.is_null() , "method should not be null"); 847 848 CallInfo info; 849 Symbol* signature = method->signature(); 850 Symbol* name = method->name(); 851 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, 852 name, signature, 853 KlassHandle(), false, true, 854 CHECK_(methodHandle())); 855 return info.selected_method(); 856 } 857 858 859 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 860 Handle receiver, bool override, objArrayHandle ptypes, 861 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 862 ResourceMark rm(THREAD); 863 864 methodHandle method; // actual method to invoke 865 KlassHandle target_klass; // target klass, receiver's klass for non-static 866 867 // Ensure klass is initialized 868 klass->initialize(CHECK_NULL); 869 870 bool is_static = reflected_method->is_static(); 871 if (is_static) { 872 // ignore receiver argument 873 method = reflected_method; 874 target_klass = klass; 875 } else { 876 // check for null receiver 877 if (receiver.is_null()) { 878 THROW_0(vmSymbols::java_lang_NullPointerException()); 879 } 880 // Check class of receiver against class declaring method 881 if (!receiver->is_a(klass())) { 882 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 883 } 884 // target klass is receiver's klass 885 target_klass = KlassHandle(THREAD, receiver->klass()); 886 // no need to resolve if method is private or <init> 887 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 888 method = reflected_method; 889 } else { 890 // resolve based on the receiver 891 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) { 892 // resolve interface call 893 if (ReflectionWrapResolutionErrors) { 894 // new default: 6531596 895 // Match resolution errors with those thrown due to reflection inlining 896 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 897 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 898 if (HAS_PENDING_EXCEPTION) { 899 // Method resolution threw an exception; wrap it in an InvocationTargetException 900 oop resolution_exception = PENDING_EXCEPTION; 901 CLEAR_PENDING_EXCEPTION; 902 JavaCallArguments args(Handle(THREAD, resolution_exception)); 903 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 904 vmSymbols::throwable_void_signature(), 905 &args); 906 } 907 } else { 908 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL)); 909 } 910 } else { 911 // if the method can be overridden, we resolve using the vtable index. 912 int index = reflected_method->vtable_index(); 913 method = reflected_method; 914 if (index != methodOopDesc::nonvirtual_vtable_index) { 915 // target_klass might be an arrayKlassOop but all vtables start at 916 // the same place. The cast is to avoid virtual call and assertion. 917 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part(); 918 method = methodHandle(THREAD, inst->method_at_vtable(index)); 919 } 920 if (!method.is_null()) { 921 // Check for abstract methods as well 922 if (method->is_abstract()) { 923 // new default: 6531596 924 if (ReflectionWrapResolutionErrors) { 925 ResourceMark rm(THREAD); 926 Handle h_origexception = Exceptions::new_exception(THREAD, 927 vmSymbols::java_lang_AbstractMethodError(), 928 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 929 method->name(), 930 method->signature())); 931 JavaCallArguments args(h_origexception); 932 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 933 vmSymbols::throwable_void_signature(), 934 &args); 935 } else { 936 ResourceMark rm(THREAD); 937 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(), 938 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()), 939 method->name(), 940 method->signature())); 941 } 942 } 943 } 944 } 945 } 946 } 947 948 // I believe this is a ShouldNotGetHere case which requires 949 // an internal vtable bug. If you ever get this please let Karen know. 950 if (method.is_null()) { 951 ResourceMark rm(THREAD); 952 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 953 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()), 954 reflected_method->name(), 955 reflected_method->signature())); 956 } 957 958 // In the JDK 1.4 reflection implementation, the security check is 959 // done at the Java level 960 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) { 961 962 // Access checking (unless overridden by Method) 963 if (!override) { 964 if (!(klass->is_public() && reflected_method->is_public())) { 965 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL); 966 if (!access) { 967 return NULL; // exception 968 } 969 } 970 } 971 972 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection) 973 974 assert(ptypes->is_objArray(), "just checking"); 975 int args_len = args.is_null() ? 0 : args->length(); 976 // Check number of arguments 977 if (ptypes->length() != args_len) { 978 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 979 } 980 981 // Create object to contain parameters for the JavaCall 982 JavaCallArguments java_args(method->size_of_parameters()); 983 984 if (!is_static) { 985 java_args.push_oop(receiver); 986 } 987 988 for (int i = 0; i < args_len; i++) { 989 oop type_mirror = ptypes->obj_at(i); 990 oop arg = args->obj_at(i); 991 if (java_lang_Class::is_primitive(type_mirror)) { 992 jvalue value; 993 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 994 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 995 if (ptype != atype) { 996 widen(&value, atype, ptype, CHECK_NULL); 997 } 998 switch (ptype) { 999 case T_BOOLEAN: java_args.push_int(value.z); break; 1000 case T_CHAR: java_args.push_int(value.c); break; 1001 case T_BYTE: java_args.push_int(value.b); break; 1002 case T_SHORT: java_args.push_int(value.s); break; 1003 case T_INT: java_args.push_int(value.i); break; 1004 case T_LONG: java_args.push_long(value.j); break; 1005 case T_FLOAT: java_args.push_float(value.f); break; 1006 case T_DOUBLE: java_args.push_double(value.d); break; 1007 default: 1008 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1009 } 1010 } else { 1011 if (arg != NULL) { 1012 klassOop k = java_lang_Class::as_klassOop(type_mirror); 1013 if (!arg->is_a(k)) { 1014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1015 } 1016 } 1017 Handle arg_handle(THREAD, arg); // Create handle for argument 1018 java_args.push_oop(arg_handle); // Push handle 1019 } 1020 } 1021 1022 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 1023 1024 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1025 // oop (i.e., NOT as an handle) 1026 JavaValue result(rtype); 1027 JavaCalls::call(&result, method, &java_args, THREAD); 1028 1029 if (HAS_PENDING_EXCEPTION) { 1030 // Method threw an exception; wrap it in an InvocationTargetException 1031 oop target_exception = PENDING_EXCEPTION; 1032 CLEAR_PENDING_EXCEPTION; 1033 JavaCallArguments args(Handle(THREAD, target_exception)); 1034 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1035 vmSymbols::throwable_void_signature(), 1036 &args); 1037 } else { 1038 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) 1039 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1040 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1041 } 1042 } 1043 1044 1045 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1046 switch (narrow_type) { 1047 case T_BOOLEAN: 1048 value->z = (jboolean) value->i; 1049 return; 1050 case T_BYTE: 1051 value->b = (jbyte) value->i; 1052 return; 1053 case T_CHAR: 1054 value->c = (jchar) value->i; 1055 return; 1056 case T_SHORT: 1057 value->s = (jshort) value->i; 1058 return; 1059 default: 1060 break; // fail 1061 } 1062 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1063 } 1064 1065 1066 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1067 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1068 return java_lang_Class::primitive_type(basic_type_mirror); 1069 } 1070 1071 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1072 // of java.lang.reflect.Constructor 1073 1074 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1075 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1076 int slot = java_lang_reflect_Method::slot(method_mirror); 1077 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1078 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1079 1080 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1081 BasicType rtype; 1082 if (java_lang_Class::is_primitive(return_type_mirror)) { 1083 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1084 } else { 1085 rtype = T_OBJECT; 1086 } 1087 1088 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1089 methodOop m = klass->method_with_idnum(slot); 1090 if (m == NULL) { 1091 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1092 } 1093 methodHandle method(THREAD, m); 1094 1095 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1096 } 1097 1098 1099 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1100 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1101 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1102 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1103 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1104 1105 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror)); 1106 methodOop m = klass->method_with_idnum(slot); 1107 if (m == NULL) { 1108 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1109 } 1110 methodHandle method(THREAD, m); 1111 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1112 1113 // Make sure klass gets initialize 1114 klass->initialize(CHECK_NULL); 1115 1116 // Create new instance (the receiver) 1117 klass->check_valid_for_instantiation(false, CHECK_NULL); 1118 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1119 1120 // Ignore result from call and return receiver 1121 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1122 return receiver(); 1123 }