reflection.cpp revision 7418:ef7449e07592
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/javaClasses.hpp" 27#include "classfile/stringTable.hpp" 28#include "classfile/systemDictionary.hpp" 29#include "classfile/verifier.hpp" 30#include "classfile/vmSymbols.hpp" 31#include "interpreter/linkResolver.hpp" 32#include "memory/oopFactory.hpp" 33#include "memory/resourceArea.hpp" 34#include "memory/universe.inline.hpp" 35#include "oops/instanceKlass.hpp" 36#include "oops/objArrayKlass.hpp" 37#include "oops/objArrayOop.hpp" 38#include "prims/jvm.h" 39#include "prims/jvmtiExport.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 48static void trace_class_resolution(Klass* to_class) { 49 ResourceMark rm; 50 int line_number = -1; 51 const char * source_file = NULL; 52 Klass* caller = NULL; 53 JavaThread* jthread = JavaThread::current(); 54 if (jthread->has_last_Java_frame()) { 55 vframeStream vfst(jthread); 56 // skip over any frames belonging to java.lang.Class 57 while (!vfst.at_end() && 58 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { 59 vfst.next(); 60 } 61 if (!vfst.at_end()) { 62 // this frame is a likely suspect 63 caller = vfst.method()->method_holder(); 64 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 65 Symbol* s = vfst.method()->method_holder()->source_file_name(); 66 if (s != NULL) { 67 source_file = s->as_C_string(); 68 } 69 } 70 } 71 if (caller != NULL) { 72 const char * from = caller->external_name(); 73 const char * to = to_class->external_name(); 74 // print in a single call to reduce interleaving between threads 75 if (source_file != NULL) { 76 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); 77 } else { 78 tty->print("RESOLVE %s %s (reflection)\n", from, to); 79 } 80 } 81} 82 83 84oop Reflection::box(jvalue* value, BasicType type, TRAPS) { 85 if (type == T_VOID) { 86 return NULL; 87 } 88 if (type == T_OBJECT || type == T_ARRAY) { 89 // regular objects are not boxed 90 return (oop) value->l; 91 } 92 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); 93 if (result == NULL) { 94 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); 95 } 96 return result; 97} 98 99 100BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { 101 if (box == NULL) { 102 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); 103 } 104 return java_lang_boxing_object::get_value(box, value); 105} 106 107BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { 108 // Note: box is really the unboxed oop. It might even be a Short, etc.! 109 value->l = (jobject) box; 110 return T_OBJECT; 111} 112 113 114void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { 115 assert(wide_type != current_type, "widen should not be called with identical types"); 116 switch (wide_type) { 117 case T_BOOLEAN: 118 case T_BYTE: 119 case T_CHAR: 120 break; // fail 121 case T_SHORT: 122 switch (current_type) { 123 case T_BYTE: 124 value->s = (jshort) value->b; 125 return; 126 } 127 break; // fail 128 case T_INT: 129 switch (current_type) { 130 case T_BYTE: 131 value->i = (jint) value->b; 132 return; 133 case T_CHAR: 134 value->i = (jint) value->c; 135 return; 136 case T_SHORT: 137 value->i = (jint) value->s; 138 return; 139 } 140 break; // fail 141 case T_LONG: 142 switch (current_type) { 143 case T_BYTE: 144 value->j = (jlong) value->b; 145 return; 146 case T_CHAR: 147 value->j = (jlong) value->c; 148 return; 149 case T_SHORT: 150 value->j = (jlong) value->s; 151 return; 152 case T_INT: 153 value->j = (jlong) value->i; 154 return; 155 } 156 break; // fail 157 case T_FLOAT: 158 switch (current_type) { 159 case T_BYTE: 160 value->f = (jfloat) value->b; 161 return; 162 case T_CHAR: 163 value->f = (jfloat) value->c; 164 return; 165 case T_SHORT: 166 value->f = (jfloat) value->s; 167 return; 168 case T_INT: 169 value->f = (jfloat) value->i; 170 return; 171 case T_LONG: 172 value->f = (jfloat) value->j; 173 return; 174 } 175 break; // fail 176 case T_DOUBLE: 177 switch (current_type) { 178 case T_BYTE: 179 value->d = (jdouble) value->b; 180 return; 181 case T_CHAR: 182 value->d = (jdouble) value->c; 183 return; 184 case T_SHORT: 185 value->d = (jdouble) value->s; 186 return; 187 case T_INT: 188 value->d = (jdouble) value->i; 189 return; 190 case T_FLOAT: 191 value->d = (jdouble) value->f; 192 return; 193 case T_LONG: 194 value->d = (jdouble) value->j; 195 return; 196 } 197 break; // fail 198 default: 199 break; // fail 200 } 201 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 202} 203 204 205BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { 206 if (!a->is_within_bounds(index)) { 207 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); 208 } 209 if (a->is_objArray()) { 210 value->l = (jobject) objArrayOop(a)->obj_at(index); 211 return T_OBJECT; 212 } else { 213 assert(a->is_typeArray(), "just checking"); 214 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 215 switch (type) { 216 case T_BOOLEAN: 217 value->z = typeArrayOop(a)->bool_at(index); 218 break; 219 case T_CHAR: 220 value->c = typeArrayOop(a)->char_at(index); 221 break; 222 case T_FLOAT: 223 value->f = typeArrayOop(a)->float_at(index); 224 break; 225 case T_DOUBLE: 226 value->d = typeArrayOop(a)->double_at(index); 227 break; 228 case T_BYTE: 229 value->b = typeArrayOop(a)->byte_at(index); 230 break; 231 case T_SHORT: 232 value->s = typeArrayOop(a)->short_at(index); 233 break; 234 case T_INT: 235 value->i = typeArrayOop(a)->int_at(index); 236 break; 237 case T_LONG: 238 value->j = typeArrayOop(a)->long_at(index); 239 break; 240 default: 241 return T_ILLEGAL; 242 } 243 return type; 244 } 245} 246 247 248void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { 249 if (!a->is_within_bounds(index)) { 250 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 251 } 252 if (a->is_objArray()) { 253 if (value_type == T_OBJECT) { 254 oop obj = (oop) value->l; 255 if (obj != NULL) { 256 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); 257 if (!obj->is_a(element_klass)) { 258 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); 259 } 260 } 261 objArrayOop(a)->obj_at_put(index, obj); 262 } 263 } else { 264 assert(a->is_typeArray(), "just checking"); 265 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); 266 if (array_type != value_type) { 267 // The widen operation can potentially throw an exception, but cannot block, 268 // so typeArrayOop a is safe if the call succeeds. 269 widen(value, value_type, array_type, CHECK); 270 } 271 switch (array_type) { 272 case T_BOOLEAN: 273 typeArrayOop(a)->bool_at_put(index, value->z); 274 break; 275 case T_CHAR: 276 typeArrayOop(a)->char_at_put(index, value->c); 277 break; 278 case T_FLOAT: 279 typeArrayOop(a)->float_at_put(index, value->f); 280 break; 281 case T_DOUBLE: 282 typeArrayOop(a)->double_at_put(index, value->d); 283 break; 284 case T_BYTE: 285 typeArrayOop(a)->byte_at_put(index, value->b); 286 break; 287 case T_SHORT: 288 typeArrayOop(a)->short_at_put(index, value->s); 289 break; 290 case T_INT: 291 typeArrayOop(a)->int_at_put(index, value->i); 292 break; 293 case T_LONG: 294 typeArrayOop(a)->long_at_put(index, value->j); 295 break; 296 default: 297 THROW(vmSymbols::java_lang_IllegalArgumentException()); 298 } 299 } 300} 301 302 303Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { 304 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 305 BasicType type = java_lang_Class::primitive_type(basic_type_mirror); 306 if (type == T_VOID) { 307 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 308 } else { 309 return Universe::typeArrayKlassObj(type); 310 } 311} 312 313 314oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { 315 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); 316 return Universe::java_mirror(type); 317} 318 319 320arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { 321 if (element_mirror == NULL) { 322 THROW_0(vmSymbols::java_lang_NullPointerException()); 323 } 324 if (length < 0) { 325 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 326 } 327 if (java_lang_Class::is_primitive(element_mirror)) { 328 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 329 return TypeArrayKlass::cast(tak)->allocate(length, THREAD); 330 } else { 331 Klass* k = java_lang_Class::as_Klass(element_mirror); 332 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { 333 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 334 } 335 return oopFactory::new_objArray(k, length, THREAD); 336 } 337} 338 339 340arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { 341 assert(dim_array->is_typeArray(), "just checking"); 342 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); 343 344 if (element_mirror == NULL) { 345 THROW_0(vmSymbols::java_lang_NullPointerException()); 346 } 347 348 int len = dim_array->length(); 349 if (len <= 0 || len > MAX_DIM) { 350 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 351 } 352 353 jint dimensions[MAX_DIM]; // C array copy of intArrayOop 354 for (int i = 0; i < len; i++) { 355 int d = dim_array->int_at(i); 356 if (d < 0) { 357 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 358 } 359 dimensions[i] = d; 360 } 361 362 Klass* klass; 363 int dim = len; 364 if (java_lang_Class::is_primitive(element_mirror)) { 365 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); 366 } else { 367 klass = java_lang_Class::as_Klass(element_mirror); 368 if (klass->oop_is_array()) { 369 int k_dim = ArrayKlass::cast(klass)->dimension(); 370 if (k_dim + len > MAX_DIM) { 371 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 372 } 373 dim += k_dim; 374 } 375 } 376 klass = klass->array_klass(dim, CHECK_NULL); 377 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); 378 assert(obj->is_array(), "just checking"); 379 return arrayOop(obj); 380} 381 382 383oop Reflection::array_component_type(oop mirror, TRAPS) { 384 if (java_lang_Class::is_primitive(mirror)) { 385 return NULL; 386 } 387 388 Klass* klass = java_lang_Class::as_Klass(mirror); 389 if (!klass->oop_is_array()) { 390 return NULL; 391 } 392 393 oop result = java_lang_Class::component_mirror(mirror); 394#ifdef ASSERT 395 oop result2 = NULL; 396 if (ArrayKlass::cast(klass)->dimension() == 1) { 397 if (klass->oop_is_typeArray()) { 398 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); 399 } else { 400 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); 401 } 402 } else { 403 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); 404 assert(lower_dim->oop_is_array(), "just checking"); 405 result2 = lower_dim->java_mirror(); 406 } 407 assert(result == result2, "results must be consistent"); 408#endif //ASSERT 409 return result; 410} 411 412 413bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) { 414 // Verify that current_class can access new_class. If the classloader_only 415 // flag is set, we automatically allow any accesses in which current_class 416 // doesn't have a classloader. 417 if ((current_class == NULL) || 418 (current_class == new_class) || 419 (new_class->is_public()) || 420 is_same_class_package(current_class, new_class)) { 421 return true; 422 } 423 // Allow all accesses from sun/reflect/MagicAccessorImpl subclasses to 424 // succeed trivially. 425 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 426 return true; 427 } 428 429 return can_relax_access_check_for(current_class, new_class, classloader_only); 430} 431 432static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) { 433 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); 434 for (;;) { 435 Klass* hc = (Klass*) ik->host_klass(); 436 if (hc == NULL) return false; 437 if (hc == host_klass) return true; 438 ik = InstanceKlass::cast(hc); 439 440 // There's no way to make a host class loop short of patching memory. 441 // Therefore there cannot be a loop here unless there's another bug. 442 // Still, let's check for it. 443 assert(--inf_loop_check > 0, "no host_klass loop"); 444 } 445} 446 447bool Reflection::can_relax_access_check_for( 448 Klass* accessor, Klass* accessee, bool classloader_only) { 449 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); 450 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); 451 452 // If either is on the other's host_klass chain, access is OK, 453 // because one is inside the other. 454 if (under_host_klass(accessor_ik, accessee) || 455 under_host_klass(accessee_ik, accessor)) 456 return true; 457 458 if ((RelaxAccessControlCheck && 459 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && 460 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || 461 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && 462 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { 463 return classloader_only && 464 Verifier::relax_verify_for(accessor_ik->class_loader()) && 465 accessor_ik->protection_domain() == accessee_ik->protection_domain() && 466 accessor_ik->class_loader() == accessee_ik->class_loader(); 467 } else { 468 return false; 469 } 470} 471 472bool Reflection::verify_field_access(Klass* current_class, 473 Klass* resolved_class, 474 Klass* field_class, 475 AccessFlags access, 476 bool classloader_only, 477 bool protected_restriction) { 478 // Verify that current_class can access a field of field_class, where that 479 // field's access bits are "access". We assume that we've already verified 480 // that current_class can access field_class. 481 // 482 // If the classloader_only flag is set, we automatically allow any accesses 483 // in which current_class doesn't have a classloader. 484 // 485 // "resolved_class" is the runtime type of "field_class". Sometimes we don't 486 // need this distinction (e.g. if all we have is the runtime type, or during 487 // class file parsing when we only care about the static type); in that case 488 // callers should ensure that resolved_class == field_class. 489 // 490 if ((current_class == NULL) || 491 (current_class == field_class) || 492 access.is_public()) { 493 return true; 494 } 495 496 Klass* host_class = current_class; 497 while (host_class->oop_is_instance() && 498 InstanceKlass::cast(host_class)->is_anonymous()) { 499 Klass* next_host_class = InstanceKlass::cast(host_class)->host_klass(); 500 if (next_host_class == NULL) break; 501 host_class = next_host_class; 502 } 503 if (host_class == field_class) { 504 return true; 505 } 506 507 if (access.is_protected()) { 508 if (!protected_restriction) { 509 // See if current_class (or outermost host class) is a subclass of field_class 510 // An interface may not access protected members of j.l.Object 511 if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) { 512 if (access.is_static() || // static fields are ok, see 6622385 513 current_class == resolved_class || 514 field_class == resolved_class || 515 host_class->is_subclass_of(resolved_class) || 516 resolved_class->is_subclass_of(host_class)) { 517 return true; 518 } 519 } 520 } 521 } 522 523 if (!access.is_private() && is_same_class_package(current_class, field_class)) { 524 return true; 525 } 526 527 // Allow all accesses from sun/reflect/MagicAccessorImpl subclasses to 528 // succeed trivially. 529 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { 530 return true; 531 } 532 533 return can_relax_access_check_for( 534 current_class, field_class, classloader_only); 535} 536 537 538bool Reflection::is_same_class_package(Klass* class1, Klass* class2) { 539 return InstanceKlass::cast(class1)->is_same_class_package(class2); 540} 541 542bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) { 543 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD); 544} 545 546 547// Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, 548// throw an incompatible class change exception 549// If inner_is_member, require the inner to be a member of the outer. 550// If !inner_is_member, require the inner to be anonymous (a non-member). 551// Caller is responsible for figuring out in advance which case must be true. 552void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 553 bool inner_is_member, TRAPS) { 554 InnerClassesIterator iter(outer); 555 constantPoolHandle cp (THREAD, outer->constants()); 556 for (; !iter.done(); iter.next()) { 557 int ioff = iter.inner_class_info_index(); 558 int ooff = iter.outer_class_info_index(); 559 560 if (inner_is_member && ioff != 0 && ooff != 0) { 561 Klass* o = cp->klass_at(ooff, CHECK); 562 if (o == outer()) { 563 Klass* i = cp->klass_at(ioff, CHECK); 564 if (i == inner()) { 565 return; 566 } 567 } 568 } 569 if (!inner_is_member && ioff != 0 && ooff == 0 && 570 cp->klass_name_at_matches(inner, ioff)) { 571 Klass* i = cp->klass_at(ioff, CHECK); 572 if (i == inner()) { 573 return; 574 } 575 } 576 } 577 578 // 'inner' not declared as an inner klass in outer 579 ResourceMark rm(THREAD); 580 Exceptions::fthrow( 581 THREAD_AND_LOCATION, 582 vmSymbols::java_lang_IncompatibleClassChangeError(), 583 "%s and %s disagree on InnerClasses attribute", 584 outer->external_name(), 585 inner->external_name() 586 ); 587} 588 589// Utility method converting a single SignatureStream element into java.lang.Class instance 590 591oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { 592 switch (ss->type()) { 593 default: 594 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); 595 return java_lang_Class::primitive_mirror(ss->type()); 596 case T_OBJECT: 597 case T_ARRAY: 598 Symbol* name = ss->as_symbol(CHECK_NULL); 599 oop loader = method->method_holder()->class_loader(); 600 oop protection_domain = method->method_holder()->protection_domain(); 601 Klass* k = SystemDictionary::resolve_or_fail( 602 name, 603 Handle(THREAD, loader), 604 Handle(THREAD, protection_domain), 605 true, CHECK_NULL); 606 if (TraceClassResolution) { 607 trace_class_resolution(k); 608 } 609 return k->java_mirror(); 610 }; 611} 612 613 614objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { 615 // Allocate array holding parameter types (java.lang.Class instances) 616 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); 617 objArrayHandle mirrors (THREAD, m); 618 int index = 0; 619 // Collect parameter types 620 ResourceMark rm(THREAD); 621 Symbol* signature = method->signature(); 622 SignatureStream ss(signature); 623 while (!ss.at_return_type()) { 624 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 625 mirrors->obj_at_put(index++, mirror); 626 ss.next(); 627 } 628 assert(index == parameter_count, "invalid parameter count"); 629 if (return_type != NULL) { 630 // Collect return type as well 631 assert(ss.at_return_type(), "return type should be present"); 632 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); 633 } 634 return mirrors; 635} 636 637objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { 638 return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); 639} 640 641 642Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) { 643 // Basic types 644 BasicType type = vmSymbols::signature_type(signature); 645 if (type != T_OBJECT) { 646 return Handle(THREAD, Universe::java_mirror(type)); 647 } 648 649 oop loader = InstanceKlass::cast(k())->class_loader(); 650 oop protection_domain = k()->protection_domain(); 651 Klass* result = SystemDictionary::resolve_or_fail(signature, 652 Handle(THREAD, loader), 653 Handle(THREAD, protection_domain), 654 true, CHECK_(Handle())); 655 656 if (TraceClassResolution) { 657 trace_class_resolution(result); 658 } 659 660 oop nt = result->java_mirror(); 661 return Handle(THREAD, nt); 662} 663 664 665oop Reflection::new_method(methodHandle method, bool for_constant_pool_access, TRAPS) { 666 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. 667 assert(!method()->is_initializer() || 668 (for_constant_pool_access && method()->is_static()), 669 "should call new_constructor instead"); 670 instanceKlassHandle holder (THREAD, method->method_holder()); 671 int slot = method->method_idnum(); 672 673 Symbol* signature = method->signature(); 674 int parameter_count = ArgumentCount(signature).size(); 675 oop return_type_oop = NULL; 676 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); 677 if (parameter_types.is_null() || return_type_oop == NULL) return NULL; 678 679 Handle return_type(THREAD, return_type_oop); 680 681 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 682 683 if (exception_types.is_null()) return NULL; 684 685 Symbol* method_name = method->name(); 686 oop name_oop = StringTable::intern(method_name, CHECK_NULL); 687 Handle name = Handle(THREAD, name_oop); 688 if (name == NULL) return NULL; 689 690 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 691 692 Handle mh = java_lang_reflect_Method::create(CHECK_NULL); 693 694 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); 695 java_lang_reflect_Method::set_slot(mh(), slot); 696 java_lang_reflect_Method::set_name(mh(), name()); 697 java_lang_reflect_Method::set_return_type(mh(), return_type()); 698 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); 699 java_lang_reflect_Method::set_exception_types(mh(), exception_types()); 700 java_lang_reflect_Method::set_modifiers(mh(), modifiers); 701 java_lang_reflect_Method::set_override(mh(), false); 702 if (java_lang_reflect_Method::has_signature_field() && 703 method->generic_signature() != NULL) { 704 Symbol* gs = method->generic_signature(); 705 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 706 java_lang_reflect_Method::set_signature(mh(), sig()); 707 } 708 if (java_lang_reflect_Method::has_annotations_field()) { 709 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 710 java_lang_reflect_Method::set_annotations(mh(), an_oop); 711 } 712 if (java_lang_reflect_Method::has_parameter_annotations_field()) { 713 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 714 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); 715 } 716 if (java_lang_reflect_Method::has_annotation_default_field()) { 717 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); 718 java_lang_reflect_Method::set_annotation_default(mh(), an_oop); 719 } 720 if (java_lang_reflect_Method::has_type_annotations_field()) { 721 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 722 java_lang_reflect_Method::set_type_annotations(mh(), an_oop); 723 } 724 return mh(); 725} 726 727 728oop Reflection::new_constructor(methodHandle method, TRAPS) { 729 assert(method()->is_initializer(), "should call new_method instead"); 730 731 instanceKlassHandle holder (THREAD, method->method_holder()); 732 int slot = method->method_idnum(); 733 734 Symbol* signature = method->signature(); 735 int parameter_count = ArgumentCount(signature).size(); 736 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); 737 if (parameter_types.is_null()) return NULL; 738 739 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); 740 if (exception_types.is_null()) return NULL; 741 742 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 743 744 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); 745 746 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); 747 java_lang_reflect_Constructor::set_slot(ch(), slot); 748 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); 749 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); 750 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); 751 java_lang_reflect_Constructor::set_override(ch(), false); 752 if (java_lang_reflect_Constructor::has_signature_field() && 753 method->generic_signature() != NULL) { 754 Symbol* gs = method->generic_signature(); 755 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 756 java_lang_reflect_Constructor::set_signature(ch(), sig()); 757 } 758 if (java_lang_reflect_Constructor::has_annotations_field()) { 759 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); 760 java_lang_reflect_Constructor::set_annotations(ch(), an_oop); 761 } 762 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { 763 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); 764 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); 765 } 766 if (java_lang_reflect_Constructor::has_type_annotations_field()) { 767 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); 768 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); 769 } 770 return ch(); 771} 772 773 774oop Reflection::new_field(fieldDescriptor* fd, TRAPS) { 775 Symbol* field_name = fd->name(); 776 oop name_oop = StringTable::intern(field_name, CHECK_NULL); 777 Handle name = Handle(THREAD, name_oop); 778 Symbol* signature = fd->signature(); 779 instanceKlassHandle holder (THREAD, fd->field_holder()); 780 Handle type = new_type(signature, holder, CHECK_NULL); 781 Handle rh = java_lang_reflect_Field::create(CHECK_NULL); 782 783 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); 784 java_lang_reflect_Field::set_slot(rh(), fd->index()); 785 java_lang_reflect_Field::set_name(rh(), name()); 786 java_lang_reflect_Field::set_type(rh(), type()); 787 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. 788 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); 789 java_lang_reflect_Field::set_override(rh(), false); 790 if (java_lang_reflect_Field::has_signature_field() && 791 fd->has_generic_signature()) { 792 Symbol* gs = fd->generic_signature(); 793 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); 794 java_lang_reflect_Field::set_signature(rh(), sig()); 795 } 796 if (java_lang_reflect_Field::has_annotations_field()) { 797 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); 798 java_lang_reflect_Field::set_annotations(rh(), an_oop); 799 } 800 if (java_lang_reflect_Field::has_type_annotations_field()) { 801 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); 802 java_lang_reflect_Field::set_type_annotations(rh(), an_oop); 803 } 804 return rh(); 805} 806 807oop Reflection::new_parameter(Handle method, int index, Symbol* sym, 808 int flags, TRAPS) { 809 Handle name; 810 811 // A null symbol here translates to the empty string 812 if(NULL != sym) { 813 name = java_lang_String::create_from_symbol(sym, CHECK_NULL); 814 } else { 815 name = java_lang_String::create_from_str("", CHECK_NULL); 816 } 817 818 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); 819 java_lang_reflect_Parameter::set_name(rh(), name()); 820 java_lang_reflect_Parameter::set_modifiers(rh(), flags); 821 java_lang_reflect_Parameter::set_executable(rh(), method()); 822 java_lang_reflect_Parameter::set_index(rh(), index); 823 return rh(); 824} 825 826 827methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, 828 KlassHandle recv_klass, Handle receiver, TRAPS) { 829 assert(!method.is_null() , "method should not be null"); 830 831 CallInfo info; 832 Symbol* signature = method->signature(); 833 Symbol* name = method->name(); 834 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, 835 name, signature, 836 KlassHandle(), false, true, 837 CHECK_(methodHandle())); 838 return info.selected_method(); 839} 840 841 842oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, 843 Handle receiver, bool override, objArrayHandle ptypes, 844 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { 845 ResourceMark rm(THREAD); 846 847 methodHandle method; // actual method to invoke 848 KlassHandle target_klass; // target klass, receiver's klass for non-static 849 850 // Ensure klass is initialized 851 klass->initialize(CHECK_NULL); 852 853 bool is_static = reflected_method->is_static(); 854 if (is_static) { 855 // ignore receiver argument 856 method = reflected_method; 857 target_klass = klass; 858 } else { 859 // check for null receiver 860 if (receiver.is_null()) { 861 THROW_0(vmSymbols::java_lang_NullPointerException()); 862 } 863 // Check class of receiver against class declaring method 864 if (!receiver->is_a(klass())) { 865 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); 866 } 867 // target klass is receiver's klass 868 target_klass = KlassHandle(THREAD, receiver->klass()); 869 // no need to resolve if method is private or <init> 870 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { 871 method = reflected_method; 872 } else { 873 // resolve based on the receiver 874 if (reflected_method->method_holder()->is_interface()) { 875 // resolve interface call 876 // 877 // Match resolution errors with those thrown due to reflection inlining 878 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() 879 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); 880 if (HAS_PENDING_EXCEPTION) { 881 // Method resolution threw an exception; wrap it in an InvocationTargetException 882 oop resolution_exception = PENDING_EXCEPTION; 883 CLEAR_PENDING_EXCEPTION; 884 // JVMTI has already reported the pending exception 885 // JVMTI internal flag reset is needed in order to report InvocationTargetException 886 if (THREAD->is_Java_thread()) { 887 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 888 } 889 JavaCallArguments args(Handle(THREAD, resolution_exception)); 890 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 891 vmSymbols::throwable_void_signature(), 892 &args); 893 } 894 } else { 895 // if the method can be overridden, we resolve using the vtable index. 896 assert(!reflected_method->has_itable_index(), ""); 897 int index = reflected_method->vtable_index(); 898 method = reflected_method; 899 if (index != Method::nonvirtual_vtable_index) { 900 // target_klass might be an arrayKlassOop but all vtables start at 901 // the same place. The cast is to avoid virtual call and assertion. 902 InstanceKlass* inst = (InstanceKlass*)target_klass(); 903 method = methodHandle(THREAD, inst->method_at_vtable(index)); 904 } 905 if (!method.is_null()) { 906 // Check for abstract methods as well 907 if (method->is_abstract()) { 908 // new default: 6531596 909 ResourceMark rm(THREAD); 910 Handle h_origexception = Exceptions::new_exception(THREAD, 911 vmSymbols::java_lang_AbstractMethodError(), 912 Method::name_and_sig_as_C_string(target_klass(), 913 method->name(), 914 method->signature())); 915 JavaCallArguments args(h_origexception); 916 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 917 vmSymbols::throwable_void_signature(), 918 &args); 919 } 920 } 921 } 922 } 923 } 924 925 // I believe this is a ShouldNotGetHere case which requires 926 // an internal vtable bug. If you ever get this please let Karen know. 927 if (method.is_null()) { 928 ResourceMark rm(THREAD); 929 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 930 Method::name_and_sig_as_C_string(klass(), 931 reflected_method->name(), 932 reflected_method->signature())); 933 } 934 935 assert(ptypes->is_objArray(), "just checking"); 936 int args_len = args.is_null() ? 0 : args->length(); 937 // Check number of arguments 938 if (ptypes->length() != args_len) { 939 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); 940 } 941 942 // Create object to contain parameters for the JavaCall 943 JavaCallArguments java_args(method->size_of_parameters()); 944 945 if (!is_static) { 946 java_args.push_oop(receiver); 947 } 948 949 for (int i = 0; i < args_len; i++) { 950 oop type_mirror = ptypes->obj_at(i); 951 oop arg = args->obj_at(i); 952 if (java_lang_Class::is_primitive(type_mirror)) { 953 jvalue value; 954 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); 955 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); 956 if (ptype != atype) { 957 widen(&value, atype, ptype, CHECK_NULL); 958 } 959 switch (ptype) { 960 case T_BOOLEAN: java_args.push_int(value.z); break; 961 case T_CHAR: java_args.push_int(value.c); break; 962 case T_BYTE: java_args.push_int(value.b); break; 963 case T_SHORT: java_args.push_int(value.s); break; 964 case T_INT: java_args.push_int(value.i); break; 965 case T_LONG: java_args.push_long(value.j); break; 966 case T_FLOAT: java_args.push_float(value.f); break; 967 case T_DOUBLE: java_args.push_double(value.d); break; 968 default: 969 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 970 } 971 } else { 972 if (arg != NULL) { 973 Klass* k = java_lang_Class::as_Klass(type_mirror); 974 if (!arg->is_a(k)) { 975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 976 } 977 } 978 Handle arg_handle(THREAD, arg); // Create handle for argument 979 java_args.push_oop(arg_handle); // Push handle 980 } 981 } 982 983 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); 984 985 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an 986 // oop (i.e., NOT as an handle) 987 JavaValue result(rtype); 988 JavaCalls::call(&result, method, &java_args, THREAD); 989 990 if (HAS_PENDING_EXCEPTION) { 991 // Method threw an exception; wrap it in an InvocationTargetException 992 oop target_exception = PENDING_EXCEPTION; 993 CLEAR_PENDING_EXCEPTION; 994 // JVMTI has already reported the pending exception 995 // JVMTI internal flag reset is needed in order to report InvocationTargetException 996 if (THREAD->is_Java_thread()) { 997 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 998 } 999 1000 JavaCallArguments args(Handle(THREAD, target_exception)); 1001 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), 1002 vmSymbols::throwable_void_signature(), 1003 &args); 1004 } else { 1005 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) 1006 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); 1007 return box((jvalue*) result.get_value_addr(), rtype, THREAD); 1008 } 1009} 1010 1011 1012void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { 1013 switch (narrow_type) { 1014 case T_BOOLEAN: 1015 value->z = (jboolean) value->i; 1016 return; 1017 case T_BYTE: 1018 value->b = (jbyte) value->i; 1019 return; 1020 case T_CHAR: 1021 value->c = (jchar) value->i; 1022 return; 1023 case T_SHORT: 1024 value->s = (jshort) value->i; 1025 return; 1026 default: 1027 break; // fail 1028 } 1029 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); 1030} 1031 1032 1033BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { 1034 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); 1035 return java_lang_Class::primitive_type(basic_type_mirror); 1036} 1037 1038// This would be nicer if, say, java.lang.reflect.Method was a subclass 1039// of java.lang.reflect.Constructor 1040 1041oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { 1042 oop mirror = java_lang_reflect_Method::clazz(method_mirror); 1043 int slot = java_lang_reflect_Method::slot(method_mirror); 1044 bool override = java_lang_reflect_Method::override(method_mirror) != 0; 1045 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); 1046 1047 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); 1048 BasicType rtype; 1049 if (java_lang_Class::is_primitive(return_type_mirror)) { 1050 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); 1051 } else { 1052 rtype = T_OBJECT; 1053 } 1054 1055 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1056 Method* m = klass->method_with_idnum(slot); 1057 if (m == NULL) { 1058 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1059 } 1060 methodHandle method(THREAD, m); 1061 1062 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); 1063} 1064 1065 1066oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { 1067 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); 1068 int slot = java_lang_reflect_Constructor::slot(constructor_mirror); 1069 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; 1070 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); 1071 1072 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); 1073 Method* m = klass->method_with_idnum(slot); 1074 if (m == NULL) { 1075 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); 1076 } 1077 methodHandle method(THREAD, m); 1078 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); 1079 1080 // Make sure klass gets initialize 1081 klass->initialize(CHECK_NULL); 1082 1083 // Create new instance (the receiver) 1084 klass->check_valid_for_instantiation(false, CHECK_NULL); 1085 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 1086 1087 // Ignore result from call and return receiver 1088 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); 1089 return receiver(); 1090} 1091