1 /* 2 * Copyright (c) 1997, 2013, 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 "runtime/arguments.hpp" 40 #include "runtime/handles.inline.hpp" 41 #include "runtime/javaCalls.hpp" 42 #include "runtime/reflection.hpp" 43 #include "runtime/reflectionUtils.hpp" 44 #include "runtime/signature.hpp" 45 #include "runtime/vframe.hpp" 46 47 static void trace_class_resolution(Klass* to_class) { 48 ResourceMark rm; 49 int line_number = -1; 50 const char * source_file = NULL; 51 Klass* caller = NULL; 52 JavaThread* jthread = JavaThread::current(); 53 if (jthread->has_last_Java_frame()) { 54 vframeStream vfst(jthread); 55 // skip over any frames belonging to java.lang.Class 56 while (!vfst.at_end() && 57 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 58 vfst.next(); 59 } 60 if (!vfst.at_end()) { 61 // this frame is a likely suspect 62 caller = vfst.method()->method_holder(); 63 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 64 Symbol* s = vfst.method()->method_holder()->source_file_name(); 65 if (s != NULL) { 66 source_file = s->as_C_string(); 67 } 68 } 69 } 70 if (caller != NULL) { 71 const char * from = caller->external_name(); 72 const char * to = to_class->external_name(); 73 // print in a single call to reduce interleaving between threads 74 if (source_file != NULL) { 75 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); 76 } else { 77 tty->print("RESOLVE %s %s (reflection)\n", from, to); 78 } 79 } 80 } 81 82 83 oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 84 if (type == T_VOID) { 85 return NULL; 86 } 87 if (type == T_OBJECT || type == T_ARRAY) { 88 // regular objects are not boxed 89 return (oop) value->l; 90 } 91 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 92 if (result == NULL) { 93 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 94 } 95 return result; 96 } 97 98 99 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 100 if (box == NULL) { 101 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 102 } 103 return java_lang_boxing_object::get_value(box, value); 104 } 105 106 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 107 // Note: box is really the unboxed oop. It might even be a Short, etc.! 108 value->l = (jobject) box; 109 return T_OBJECT; 110 } 111 112 113 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 114 assert(wide_type != current_type, "widen should not be called with identical types"); 115 switch (wide_type) { 116 case T_BOOLEAN: 117 case T_BYTE: 118 case T_CHAR: 119 break; // fail 120 case T_SHORT: 121 switch (current_type) { 122 case T_BYTE: 123 value->s = (jshort) value->b; 124 return; 125 } 126 break; // fail 127 case T_INT: 128 switch (current_type) { 129 case T_BYTE: 130 value->i = (jint) value->b; 131 return; 132 case T_CHAR: 133 value->i = (jint) value->c; 134 return; 135 case T_SHORT: 136 value->i = (jint) value->s; 137 return; 138 } 139 break; // fail 140 case T_LONG: 141 switch (current_type) { 142 case T_BYTE: 143 value->j = (jlong) value->b; 144 return; 145 case T_CHAR: 146 value->j = (jlong) value->c; 147 return; 148 case T_SHORT: 149 value->j = (jlong) value->s; 150 return; 151 case T_INT: 152 value->j = (jlong) value->i; 153 return; 154 } 155 break; // fail 156 case T_FLOAT: 157 switch (current_type) { 158 case T_BYTE: 159 value->f = (jfloat) value->b; 160 return; 161 case T_CHAR: 162 value->f = (jfloat) value->c; 163 return; 164 case T_SHORT: 165 value->f = (jfloat) value->s; 166 return; 167 case T_INT: 168 value->f = (jfloat) value->i; 169 return; 170 case T_LONG: 171 value->f = (jfloat) value->j; 172 return; 173 } 174 break; // fail 175 case T_DOUBLE: 176 switch (current_type) { 177 case T_BYTE: 178 value->d = (jdouble) value->b; 179 return; 180 case T_CHAR: 181 value->d = (jdouble) value->c; 182 return; 183 case T_SHORT: 184 value->d = (jdouble) value->s; 185 return; 186 case T_INT: 187 value->d = (jdouble) value->i; 188 return; 189 case T_FLOAT: 190 value->d = (jdouble) value->f; 191 return; 192 case T_LONG: 193 value->d = (jdouble) value->j; 194 return; 195 } 196 break; // fail 197 default: 198 break; // fail 199 } 200 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 201 } 202 203 204 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 205 if (!a->is_within_bounds(index)) { 206 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 207 } 208 if (a->is_objArray()) { 209 value->l = (jobject) objArrayOop(a)->obj_at(index); 210 return T_OBJECT; 211 } else { 212 assert(a->is_typeArray(), "just checking"); 213 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 214 switch (type) { 215 case T_BOOLEAN: 216 value->z = typeArrayOop(a)->bool_at(index); 217 break; 218 case T_CHAR: 219 value->c = typeArrayOop(a)->char_at(index); 220 break; 221 case T_FLOAT: 222 value->f = typeArrayOop(a)->float_at(index); 223 break; 224 case T_DOUBLE: 225 value->d = typeArrayOop(a)->double_at(index); 226 break; 227 case T_BYTE: 228 value->b = typeArrayOop(a)->byte_at(index); 229 break; 230 case T_SHORT: 231 value->s = typeArrayOop(a)->short_at(index); 232 break; 233 case T_INT: 234 value->i = typeArrayOop(a)->int_at(index); 235 break; 236 case T_LONG: 237 value->j = typeArrayOop(a)->long_at(index); 238 break; 239 default: 240 return T_ILLEGAL; 241 } 242 return type; 243 } 244 } 245 246 247 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 248 if (!a->is_within_bounds(index)) { 249 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 250 } 251 if (a->is_objArray()) { 252 if (value_type == T_OBJECT) { 253 oop obj = (oop) value->l; 254 if (obj != NULL) { 255 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 256 if (!obj->is_a(element_klass)) { 257 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 258 } 259 } 260 objArrayOop(a)->obj_at_put(index, obj); 261 } 262 } else { 263 assert(a->is_typeArray(), "just checking"); 264 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 265 if (array_type != value_type) { 266 // The widen operation can potentially throw an exception, but cannot block, 267 // so typeArrayOop a is safe if the call succeeds. 268 widen(value, value_type, array_type, CHECK); 269 } 270 switch (array_type) { 271 case T_BOOLEAN: 272 typeArrayOop(a)->bool_at_put(index, value->z); 273 break; 274 case T_CHAR: 275 typeArrayOop(a)->char_at_put(index, value->c); 276 break; 277 case T_FLOAT: 278 typeArrayOop(a)->float_at_put(index, value->f); 279 break; 280 case T_DOUBLE: 281 typeArrayOop(a)->double_at_put(index, value->d); 282 break; 283 case T_BYTE: 284 typeArrayOop(a)->byte_at_put(index, value->b); 285 break; 286 case T_SHORT: 287 typeArrayOop(a)->short_at_put(index, value->s); 288 break; 289 case T_INT: 290 typeArrayOop(a)->int_at_put(index, value->i); 291 break; 292 case T_LONG: 293 typeArrayOop(a)->long_at_put(index, value->j); 294 break; 295 default: 296 THROW(vmSymbols::java_lang_IllegalArgumentException()); 297 } 298 } 299 } 300 301 302 Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 303 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 304 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 305 if (type == T_VOID) { 306 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 307 } else { 308 return Universe::typeArrayKlassObj(type); 309 } 310 } 311 312 313 oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 314 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 315 return Universe::java_mirror(type); 316 } 317 318 319 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 320 if (element_mirror == NULL) { 321 THROW_0(vmSymbols::java_lang_NullPointerException()); 322 } 323 if (length < 0) { 324 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 325 } 326 if (java_lang_Class::is_primitive(element_mirror)) { 327 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 328 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 329 } else { 330 Klass* k = java_lang_Class::as_Klass(element_mirror); 331 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 332 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 333 } 334 return oopFactory::new_objArray(k, length, THREAD); 335 } 336 } 337 338 339 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 340 assert(dim_array->is_typeArray(), "just checking"); 341 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 342 343 if (element_mirror == NULL) { 344 THROW_0(vmSymbols::java_lang_NullPointerException()); 345 } 346 347 int len = dim_array->length(); 348 if (len <= 0 || len > MAX_DIM) { 349 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 350 } 351 352 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 353 for (int i = 0; i < len; i++) { 354 int d = dim_array->int_at(i); 355 if (d < 0) { 356 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 357 } 358 dimensions[i] = d; 359 } 360 361 Klass* klass; 362 int dim = len; 363 if (java_lang_Class::is_primitive(element_mirror)) { 364 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 365 } else { 366 klass = java_lang_Class::as_Klass(element_mirror); 367 if (klass->oop_is_array()) { 368 int k_dim = ArrayKlass::cast(klass)->dimension(); 369 if (k_dim + len > MAX_DIM) { 370 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 371 } 372 dim += k_dim; 373 } 374 } 375 klass = klass->array_klass(dim, CHECK_NULL); 376 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 377 assert(obj->is_array(), "just checking"); 378 return arrayOop(obj); 379 } 380 381 382 oop Reflection::array_component_type(oop mirror, TRAPS) { 383 if (java_lang_Class::is_primitive(mirror)) { 384 return NULL; 385 } 386 387 Klass* klass = java_lang_Class::as_Klass(mirror); 388 if (!klass->oop_is_array()) { 389 return NULL; 390 } 391 392 oop result = ArrayKlass::cast(klass)->component_mirror(); 393 #ifdef ASSERT 394 oop result2 = NULL; 395 if (ArrayKlass::cast(klass)->dimension() == 1) { 396 if (klass->oop_is_typeArray()) { 397 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 398 } else { 399 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 400 } 401 } else { 402 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 403 assert(lower_dim->oop_is_array(), "just checking"); 404 result2 = lower_dim->java_mirror(); 405 } 406 assert(result == result2, "results must be consistent"); 407 #endif //ASSERT 408 return result; 409 } 410 411 412 bool Reflection::reflect_check_access(Klass* field_class, AccessFlags acc, Klass* target_class, bool is_method_invoke, TRAPS) { 413 // field_class : declaring class 414 // acc : declared field access 415 // target_class : for protected 416 417 // Check if field or method is accessible to client. Throw an 418 // IllegalAccessException and return false if not. 419 420 // The "client" is the class associated with the nearest real frame 421 // getCallerClass already skips Method.invoke frames, so pass 0 in 422 // that case (same as classic). 423 ResourceMark rm(THREAD); 424 assert(THREAD->is_Java_thread(), "sanity check"); 425 Klass* client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1); 426 427 if (client_class != field_class) { 428 if (!verify_class_access(client_class, field_class, false) 429 || !verify_field_access(client_class, 430 field_class, 431 field_class, 432 acc, 433 false)) { 434 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 435 } 436 } 437 438 // Additional test for protected members: JLS 6.6.2 439 440 if (acc.is_protected()) { 441 if (target_class != client_class) { 442 if (!is_same_class_package(client_class, field_class)) { 443 if (!target_class->is_subclass_of(client_class)) { 444 THROW_(vmSymbols::java_lang_IllegalAccessException(), false); 445 } 446 } 447 } 448 } 449 450 // Passed all tests 451 return true; 452 } 453 454 455 bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) { 456 // Verify that current_class can access new_class. If the classloader_only 457 // flag is set, we automatically allow any accesses in which current_class 458 // doesn't have a classloader. 459 if ((current_class == NULL) || 460 (current_class == new_class) || 461 (new_class->is_public()) || 462 is_same_class_package(current_class, new_class)) { 463 return true; 464 } 465 // New (1.4) reflection implementation. Allow all accesses from 466 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. 467 if ( JDK_Version::is_gte_jdk14x_version() 468 && UseNewReflection 469 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 470 return true; 471 } 472 473 // Also allow all accesses from 474 // java/lang/invoke/MagicLambdaImpl subclasses to succeed trivially. 475 if (current_class->is_subclass_of(SystemDictionary::lambda_MagicLambdaImpl_klass())) { 476 return true; 477 } 478 479 return can_relax_access_check_for(current_class, new_class, classloader_only); 480 } 481 482 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) { 483 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 484 for (;;) { 485 Klass* hc = (Klass*) ik->host_klass(); 486 if (hc == NULL) return false; 487 if (hc == host_klass) return true; 488 ik = InstanceKlass::cast(hc); 489 490 // There's no way to make a host class loop short of patching memory. 491 // Therefore there cannot be a loop here unles there's another bug. 492 // Still, let's check for it. 493 assert(--inf_loop_check > 0, "no host_klass loop"); 494 } 495 } 496 497 bool Reflection::can_relax_access_check_for( 498 Klass* accessor, Klass* accessee, bool classloader_only) { 499 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 500 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 501 502 // If either is on the other's host_klass chain, access is OK, 503 // because one is inside the other. 504 if (under_host_klass(accessor_ik, accessee) || 505 under_host_klass(accessee_ik, accessor)) 506 return true; 507 508 if ((RelaxAccessControlCheck && 509 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 510 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 511 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 512 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_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(Klass* current_class, 523 Klass* resolved_class, 524 Klass* 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 (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 current_class->is_subclass_of(resolved_class) || 554 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 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 570 return true; 571 } 572 573 // Also allow all accesses from 574 // java/lang/invoke/MagicLambdaImpl subclasses to succeed trivially. 575 if (current_class->is_subclass_of(SystemDictionary::lambda_MagicLambdaImpl_klass())) { 576 return true; 577 } 578 579 return can_relax_access_check_for( 580 current_class, field_class, classloader_only); 581 } 582 583 584 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) { 585 return InstanceKlass::cast(class1)->is_same_class_package(class2); 586 } 587 588 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) { 589 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD); 590 } 591 592 593 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 594 // throw an incompatible class change exception 595 // If inner_is_member, require the inner to be a member of the outer. 596 // If !inner_is_member, require the inner to be anonymous (a non-member). 597 // Caller is responsible for figuring out in advance which case must be true. 598 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 599 bool inner_is_member, TRAPS) { 600 InnerClassesIterator iter(outer); 601 constantPoolHandle cp (THREAD, outer->constants()); 602 for (; !iter.done(); iter.next()) { 603 int ioff = iter.inner_class_info_index(); 604 int ooff = iter.outer_class_info_index(); 605 606 if (inner_is_member && ioff != 0 && ooff != 0) { 607 Klass* o = cp->klass_at(ooff, CHECK); 608 if (o == outer()) { 609 Klass* i = cp->klass_at(ioff, CHECK); 610 if (i == inner()) { 611 return; 612 } 613 } 614 } 615 if (!inner_is_member && ioff != 0 && ooff == 0 && 616 cp->klass_name_at_matches(inner, ioff)) { 617 Klass* i = cp->klass_at(ioff, CHECK); 618 if (i == inner()) { 619 return; 620 } 621 } 622 } 623 624 // 'inner' not declared as an inner klass in outer 625 ResourceMark rm(THREAD); 626 Exceptions::fthrow( 627 THREAD_AND_LOCATION, 628 vmSymbols::java_lang_IncompatibleClassChangeError(), 629 "%s and %s disagree on InnerClasses attribute", 630 outer->external_name(), 631 inner->external_name() 632 ); 633 } 634 635 // Utility method converting a single SignatureStream element into java.lang.Class instance 636 637 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 638 switch (ss->type()) { 639 default: 640 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 641 return java_lang_Class::primitive_mirror(ss->type()); 642 case T_OBJECT: 643 case T_ARRAY: 644 Symbol* name = ss->as_symbol(CHECK_NULL); 645 oop loader = method->method_holder()->class_loader(); 646 oop protection_domain = method->method_holder()->protection_domain(); 647 Klass* k = SystemDictionary::resolve_or_fail( 648 name, 649 Handle(THREAD, loader), 650 Handle(THREAD, protection_domain), 651 true, CHECK_NULL); 652 if (TraceClassResolution) { 653 trace_class_resolution(k); 654 } 655 return k->java_mirror(); 656 }; 657 } 658 659 660 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 661 // Allocate array holding parameter types (java.lang.Class instances) 662 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 663 objArrayHandle mirrors (THREAD, m); 664 int index = 0; 665 // Collect parameter types 666 ResourceMark rm(THREAD); 667 Symbol* signature = method->signature(); 668 SignatureStream ss(signature); 669 while (!ss.at_return_type()) { 670 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 671 mirrors->obj_at_put(index++, mirror); 672 ss.next(); 673 } 674 assert(index == parameter_count, "invalid parameter count"); 675 if (return_type != NULL) { 676 // Collect return type as well 677 assert(ss.at_return_type(), "return type should be present"); 678 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 679 } 680 return mirrors; 681 } 682 683 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 684 return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); 685 } 686 687 688 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) { 689 // Basic types 690 BasicType type = vmSymbols::signature_type(signature); 691 if (type != T_OBJECT) { 692 return Handle(THREAD, Universe::java_mirror(type)); 693 } 694 695 oop loader = InstanceKlass::cast(k())->class_loader(); 696 oop protection_domain = k()->protection_domain(); 697 Klass* result = SystemDictionary::resolve_or_fail(signature, 698 Handle(THREAD, loader), 699 Handle(THREAD, protection_domain), 700 true, CHECK_(Handle())); 701 702 if (TraceClassResolution) { 703 trace_class_resolution(result); 704 } 705 706 oop nt = result->java_mirror(); 707 return Handle(THREAD, nt); 708 } 709 710 711 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) { 712 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert. 713 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 714 assert(!method()->is_initializer() || 715 (for_constant_pool_access && method()->is_static()) || 716 (method()->name() == vmSymbols::class_initializer_name() 717 && method()->method_holder()->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead"); 718 instanceKlassHandle holder (THREAD, method->method_holder()); 719 int slot = method->method_idnum(); 720 721 Symbol* signature = method->signature(); 722 int parameter_count = ArgumentCount(signature).size(); 723 oop return_type_oop = NULL; 724 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 725 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 726 727 Handle return_type(THREAD, return_type_oop); 728 729 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 730 731 if (exception_types.is_null()) return NULL; 732 733 Symbol* method_name = method->name(); 734 Handle name; 735 if (intern_name) { 736 // intern_name is only true with UseNewReflection 737 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 738 name = Handle(THREAD, name_oop); 739 } else { 740 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL); 741 } 742 if (name == NULL) return NULL; 743 744 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 745 746 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 747 748 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 749 java_lang_reflect_Method::set_slot(mh(), slot); 750 java_lang_reflect_Method::set_name(mh(), name()); 751 java_lang_reflect_Method::set_return_type(mh(), return_type()); 752 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 753 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 754 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 755 java_lang_reflect_Method::set_override(mh(), false); 756 if (java_lang_reflect_Method::has_signature_field() && 757 method->generic_signature() != NULL) { 758 Symbol* gs = method->generic_signature(); 759 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 760 java_lang_reflect_Method::set_signature(mh(), sig()); 761 } 762 if (java_lang_reflect_Method::has_annotations_field()) { 763 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 764 java_lang_reflect_Method::set_annotations(mh(), an_oop); 765 } 766 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 767 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 768 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 769 } 770 if (java_lang_reflect_Method::has_annotation_default_field()) { 771 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 772 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 773 } 774 if (java_lang_reflect_Method::has_type_annotations_field()) { 775 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 776 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 777 } 778 return mh(); 779 } 780 781 782 oop Reflection::new_constructor(methodHandle method, TRAPS) { 783 assert(method()->is_initializer(), "should call new_method instead"); 784 785 instanceKlassHandle holder (THREAD, method->method_holder()); 786 int slot = method->method_idnum(); 787 788 Symbol* signature = method->signature(); 789 int parameter_count = ArgumentCount(signature).size(); 790 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 791 if (parameter_types.is_null()) return NULL; 792 793 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 794 if (exception_types.is_null()) return NULL; 795 796 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 797 798 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 799 800 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 801 java_lang_reflect_Constructor::set_slot(ch(), slot); 802 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 803 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 804 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 805 java_lang_reflect_Constructor::set_override(ch(), false); 806 if (java_lang_reflect_Constructor::has_signature_field() && 807 method->generic_signature() != NULL) { 808 Symbol* gs = method->generic_signature(); 809 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 810 java_lang_reflect_Constructor::set_signature(ch(), sig()); 811 } 812 if (java_lang_reflect_Constructor::has_annotations_field()) { 813 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 814 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 815 } 816 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 817 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 818 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 819 } 820 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 821 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 822 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 823 } 824 return ch(); 825 } 826 827 828 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) { 829 Symbol* field_name = fd->name(); 830 Handle name; 831 if (intern_name) { 832 // intern_name is only true with UseNewReflection 833 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 834 name = Handle(THREAD, name_oop); 835 } else { 836 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); 837 } 838 Symbol* signature = fd->signature(); 839 instanceKlassHandle holder (THREAD, fd->field_holder()); 840 Handle type = new_type(signature, holder, CHECK_NULL); 841 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 842 843 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 844 java_lang_reflect_Field::set_slot(rh(), fd->index()); 845 java_lang_reflect_Field::set_name(rh(), name()); 846 java_lang_reflect_Field::set_type(rh(), type()); 847 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 848 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 849 java_lang_reflect_Field::set_override(rh(), false); 850 if (java_lang_reflect_Field::has_signature_field() && 851 fd->has_generic_signature()) { 852 Symbol* gs = fd->generic_signature(); 853 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 854 java_lang_reflect_Field::set_signature(rh(), sig()); 855 } 856 if (java_lang_reflect_Field::has_annotations_field()) { 857 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 858 java_lang_reflect_Field::set_annotations(rh(), an_oop); 859 } 860 if (java_lang_reflect_Field::has_type_annotations_field()) { 861 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 862 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 863 } 864 return rh(); 865 } 866 867 oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 868 int flags, TRAPS) { 869 Handle name; 870 871 // A null symbol here translates to the empty string 872 if(NULL != sym) { 873 name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 874 } else { 875 name = java_lang_String::create_from_str("", CHECK_NULL); 876 } 877 878 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 879 java_lang_reflect_Parameter::set_name(rh(), name()); 880 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 881 java_lang_reflect_Parameter::set_executable(rh(), method()); 882 java_lang_reflect_Parameter::set_index(rh(), index); 883 return rh(); 884 } 885 886 887 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 888 KlassHandle recv_klass, Handle receiver, TRAPS) { 889 assert(!method.is_null() , "method should not be null"); 890 891 CallInfo info; 892 Symbol* signature = method->signature(); 893 Symbol* name = method->name(); 894 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, 895 name, signature, 896 KlassHandle(), false, true, 897 CHECK_(methodHandle())); 898 return info.selected_method(); 899 } 900 901 902 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 903 Handle receiver, bool override, objArrayHandle ptypes, 904 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 905 ResourceMark rm(THREAD); 906 907 methodHandle method; // actual method to invoke 908 KlassHandle target_klass; // target klass, receiver's klass for non-static 909 910 // Ensure klass is initialized 911 klass->initialize(CHECK_NULL); 912 913 bool is_static = reflected_method->is_static(); 914 if (is_static) { 915 // ignore receiver argument 916 method = reflected_method; 917 target_klass = klass; 918 } else { 919 // check for null receiver 920 if (receiver.is_null()) { 921 THROW_0(vmSymbols::java_lang_NullPointerException()); 922 } 923 // Check class of receiver against class declaring method 924 if (!receiver->is_a(klass())) { 925 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 926 } 927 // target klass is receiver's klass 928 target_klass = KlassHandle(THREAD, receiver->klass()); 929 // no need to resolve if method is private or <init> 930 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 931 method = reflected_method; 932 } else { 933 // resolve based on the receiver 934 if (reflected_method->method_holder()->is_interface()) { 935 // resolve interface call 936 if (ReflectionWrapResolutionErrors) { 937 // new default: 6531596 938 // Match resolution errors with those thrown due to reflection inlining 939 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 940 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 941 if (HAS_PENDING_EXCEPTION) { 942 // Method resolution threw an exception; wrap it in an InvocationTargetException 943 oop resolution_exception = PENDING_EXCEPTION; 944 CLEAR_PENDING_EXCEPTION; 945 JavaCallArguments args(Handle(THREAD, resolution_exception)); 946 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 947 vmSymbols::throwable_void_signature(), 948 &args); 949 } 950 } else { 951 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL)); 952 } 953 } else { 954 // if the method can be overridden, we resolve using the vtable index. 955 assert(!reflected_method->has_itable_index(), ""); 956 int index = reflected_method->vtable_index(); 957 method = reflected_method; 958 if (index != Method::nonvirtual_vtable_index) { 959 // target_klass might be an arrayKlassOop but all vtables start at 960 // the same place. The cast is to avoid virtual call and assertion. 961 InstanceKlass* inst = (InstanceKlass*)target_klass(); 962 method = methodHandle(THREAD, inst->method_at_vtable(index)); 963 } 964 if (!method.is_null()) { 965 // Check for abstract methods as well 966 if (method->is_abstract()) { 967 // new default: 6531596 968 if (ReflectionWrapResolutionErrors) { 969 ResourceMark rm(THREAD); 970 Handle h_origexception = Exceptions::new_exception(THREAD, 971 vmSymbols::java_lang_AbstractMethodError(), 972 Method::name_and_sig_as_C_string(target_klass(), 973 method->name(), 974 method->signature())); 975 JavaCallArguments args(h_origexception); 976 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 977 vmSymbols::throwable_void_signature(), 978 &args); 979 } else { 980 ResourceMark rm(THREAD); 981 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(), 982 Method::name_and_sig_as_C_string(target_klass(), 983 method->name(), 984 method->signature())); 985 } 986 } 987 } 988 } 989 } 990 } 991 992 // I believe this is a ShouldNotGetHere case which requires 993 // an internal vtable bug. If you ever get this please let Karen know. 994 if (method.is_null()) { 995 ResourceMark rm(THREAD); 996 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 997 Method::name_and_sig_as_C_string(klass(), 998 reflected_method->name(), 999 reflected_method->signature())); 1000 } 1001 1002 // In the JDK 1.4 reflection implementation, the security check is 1003 // done at the Java level 1004 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) { 1005 1006 // Access checking (unless overridden by Method) 1007 if (!override) { 1008 if (!(klass->is_public() && reflected_method->is_public())) { 1009 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL); 1010 if (!access) { 1011 return NULL; // exception 1012 } 1013 } 1014 } 1015 1016 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection) 1017 1018 assert(ptypes->is_objArray(), "just checking"); 1019 int args_len = args.is_null() ? 0 : args->length(); 1020 // Check number of arguments 1021 if (ptypes->length() != args_len) { 1022 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 1023 } 1024 1025 // Create object to contain parameters for the JavaCall 1026 JavaCallArguments java_args(method->size_of_parameters()); 1027 1028 if (!is_static) { 1029 java_args.push_oop(receiver); 1030 } 1031 1032 for (int i = 0; i < args_len; i++) { 1033 oop type_mirror = ptypes->obj_at(i); 1034 oop arg = args->obj_at(i); 1035 if (java_lang_Class::is_primitive(type_mirror)) { 1036 jvalue value; 1037 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 1038 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 1039 if (ptype != atype) { 1040 widen(&value, atype, ptype, CHECK_NULL); 1041 } 1042 switch (ptype) { 1043 case T_BOOLEAN: java_args.push_int(value.z); break; 1044 case T_CHAR: java_args.push_int(value.c); break; 1045 case T_BYTE: java_args.push_int(value.b); break; 1046 case T_SHORT: java_args.push_int(value.s); break; 1047 case T_INT: java_args.push_int(value.i); break; 1048 case T_LONG: java_args.push_long(value.j); break; 1049 case T_FLOAT: java_args.push_float(value.f); break; 1050 case T_DOUBLE: java_args.push_double(value.d); break; 1051 default: 1052 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1053 } 1054 } else { 1055 if (arg != NULL) { 1056 Klass* k = java_lang_Class::as_Klass(type_mirror); 1057 if (!arg->is_a(k)) { 1058 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1059 } 1060 } 1061 Handle arg_handle(THREAD, arg); // Create handle for argument 1062 java_args.push_oop(arg_handle); // Push handle 1063 } 1064 } 1065 1066 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 1067 1068 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 1069 // oop (i.e., NOT as an handle) 1070 JavaValue result(rtype); 1071 JavaCalls::call(&result, method, &java_args, THREAD); 1072 1073 if (HAS_PENDING_EXCEPTION) { 1074 // Method threw an exception; wrap it in an InvocationTargetException 1075 oop target_exception = PENDING_EXCEPTION; 1076 CLEAR_PENDING_EXCEPTION; 1077 JavaCallArguments args(Handle(THREAD, target_exception)); 1078 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1079 vmSymbols::throwable_void_signature(), 1080 &args); 1081 } else { 1082 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) 1083 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1084 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1085 } 1086 } 1087 1088 1089 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1090 switch (narrow_type) { 1091 case T_BOOLEAN: 1092 value->z = (jboolean) value->i; 1093 return; 1094 case T_BYTE: 1095 value->b = (jbyte) value->i; 1096 return; 1097 case T_CHAR: 1098 value->c = (jchar) value->i; 1099 return; 1100 case T_SHORT: 1101 value->s = (jshort) value->i; 1102 return; 1103 default: 1104 break; // fail 1105 } 1106 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1107 } 1108 1109 1110 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1111 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1112 return java_lang_Class::primitive_type(basic_type_mirror); 1113 } 1114 1115 // This would be nicer if, say, java.lang.reflect.Method was a subclass 1116 // of java.lang.reflect.Constructor 1117 1118 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1119 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1120 int slot = java_lang_reflect_Method::slot(method_mirror); 1121 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1122 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1123 1124 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1125 BasicType rtype; 1126 if (java_lang_Class::is_primitive(return_type_mirror)) { 1127 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1128 } else { 1129 rtype = T_OBJECT; 1130 } 1131 1132 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1133 Method* m = klass->method_with_idnum(slot); 1134 if (m == NULL) { 1135 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1136 } 1137 methodHandle method(THREAD, m); 1138 1139 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1140 } 1141 1142 1143 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1144 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1145 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1146 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1147 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1148 1149 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1150 Method* m = klass->method_with_idnum(slot); 1151 if (m == NULL) { 1152 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1153 } 1154 methodHandle method(THREAD, m); 1155 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1156 1157 // Make sure klass gets initialize 1158 klass->initialize(CHECK_NULL); 1159 1160 // Create new instance (the receiver) 1161 klass->check_valid_for_instantiation(false, CHECK_NULL); 1162 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1163 1164 // Ignore result from call and return receiver 1165 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1166 return receiver(); 1167 }