1 /* 2 * Copyright (c) 1997, 2017, 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 "jvm.h" 27 #include "classfile/defaultMethods.hpp" 28 #include "classfile/javaClasses.hpp" 29 #include "classfile/resolutionErrors.hpp" 30 #include "classfile/symbolTable.hpp" 31 #include "classfile/systemDictionary.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "gc/shared/collectedHeap.inline.hpp" 35 #include "interpreter/bytecode.hpp" 36 #include "interpreter/interpreterRuntime.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logStream.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "memory/universe.inline.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/method.hpp" 44 #include "oops/objArrayOop.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "prims/methodHandles.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "runtime/compilationPolicy.hpp" 49 #include "runtime/fieldDescriptor.hpp" 50 #include "runtime/frame.inline.hpp" 51 #include "runtime/handles.inline.hpp" 52 #include "runtime/reflection.hpp" 53 #include "runtime/signature.hpp" 54 #include "runtime/thread.inline.hpp" 55 #include "runtime/vmThread.hpp" 56 57 58 //------------------------------------------------------------------------------------------------------------------------ 59 // Implementation of CallInfo 60 61 62 void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) { 63 int vtable_index = Method::nonvirtual_vtable_index; 64 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 65 } 66 67 68 void CallInfo::set_interface(Klass* resolved_klass, 69 Klass* selected_klass, 70 const methodHandle& resolved_method, 71 const methodHandle& selected_method, 72 int itable_index, TRAPS) { 73 // This is only called for interface methods. If the resolved_method 74 // comes from java/lang/Object, it can be the subject of a virtual call, so 75 // we should pick the vtable index from the resolved method. 76 // In that case, the caller must call set_virtual instead of set_interface. 77 assert(resolved_method->method_holder()->is_interface(), ""); 78 assert(itable_index == resolved_method()->itable_index(), ""); 79 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK); 80 } 81 82 void CallInfo::set_virtual(Klass* resolved_klass, 83 Klass* selected_klass, 84 const methodHandle& resolved_method, 85 const methodHandle& selected_method, 86 int vtable_index, TRAPS) { 87 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); 88 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), ""); 89 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call); 90 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK); 91 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); 92 } 93 94 void CallInfo::set_handle(const methodHandle& resolved_method, 95 Handle resolved_appendix, 96 Handle resolved_method_type, TRAPS) { 97 set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK); 98 } 99 100 void CallInfo::set_handle(Klass* resolved_klass, 101 const methodHandle& resolved_method, 102 Handle resolved_appendix, 103 Handle resolved_method_type, TRAPS) { 104 if (resolved_method.is_null()) { 105 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); 106 } 107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || 108 resolved_method->is_compiled_lambda_form(), 109 "linkMethod must return one of these"); 110 int vtable_index = Method::nonvirtual_vtable_index; 111 assert(!resolved_method->has_vtable_index(), ""); 112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 113 _resolved_appendix = resolved_appendix; 114 _resolved_method_type = resolved_method_type; 115 } 116 117 void CallInfo::set_common(Klass* resolved_klass, 118 Klass* selected_klass, 119 const methodHandle& resolved_method, 120 const methodHandle& selected_method, 121 CallKind kind, 122 int index, 123 TRAPS) { 124 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); 125 _resolved_klass = resolved_klass; 126 _selected_klass = selected_klass; 127 _resolved_method = resolved_method; 128 _selected_method = selected_method; 129 _call_kind = kind; 130 _call_index = index; 131 _resolved_appendix = Handle(); 132 DEBUG_ONLY(verify()); // verify before making side effects 133 134 CompilationPolicy::compile_if_required(selected_method, THREAD); 135 } 136 137 // utility query for unreflecting a method 138 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) { 139 Klass* resolved_method_holder = resolved_method->method_holder(); 140 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st 141 resolved_klass = resolved_method_holder; 142 } 143 _resolved_klass = resolved_klass; 144 _selected_klass = resolved_klass; 145 _resolved_method = resolved_method; 146 _selected_method = resolved_method; 147 // classify: 148 CallKind kind = CallInfo::unknown_kind; 149 int index = resolved_method->vtable_index(); 150 if (resolved_method->can_be_statically_bound()) { 151 kind = CallInfo::direct_call; 152 } else if (!resolved_method_holder->is_interface()) { 153 // Could be an Object method inherited into an interface, but still a vtable call. 154 kind = CallInfo::vtable_call; 155 } else if (!resolved_klass->is_interface()) { 156 // A default or miranda method. Compute the vtable index. 157 index = LinkResolver::vtable_index_of_interface_method(resolved_klass, 158 resolved_method); 159 assert(index >= 0 , "we should have valid vtable index at this point"); 160 161 kind = CallInfo::vtable_call; 162 } else if (resolved_method->has_vtable_index()) { 163 // Can occur if an interface redeclares a method of Object. 164 165 #ifdef ASSERT 166 // Ensure that this is really the case. 167 Klass* object_klass = SystemDictionary::Object_klass(); 168 Method * object_resolved_method = object_klass->vtable().method_at(index); 169 assert(object_resolved_method->name() == resolved_method->name(), 170 "Object and interface method names should match at vtable index %d, %s != %s", 171 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()); 172 assert(object_resolved_method->signature() == resolved_method->signature(), 173 "Object and interface method signatures should match at vtable index %d, %s != %s", 174 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()); 175 #endif // ASSERT 176 177 kind = CallInfo::vtable_call; 178 } else { 179 // A regular interface call. 180 kind = CallInfo::itable_call; 181 index = resolved_method->itable_index(); 182 } 183 assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index); 184 _call_kind = kind; 185 _call_index = index; 186 _resolved_appendix = Handle(); 187 // Find or create a ResolvedMethod instance for this Method* 188 set_resolved_method_name(CHECK); 189 190 DEBUG_ONLY(verify()); 191 } 192 193 void CallInfo::set_resolved_method_name(TRAPS) { 194 Method* m = _resolved_method(); 195 assert(m != NULL, "Should already have a Method*"); 196 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 197 _resolved_method_name = Handle(THREAD, rmethod_name); 198 } 199 200 #ifdef ASSERT 201 void CallInfo::verify() { 202 switch (call_kind()) { // the meaning and allowed value of index depends on kind 203 case CallInfo::direct_call: 204 if (_call_index == Method::nonvirtual_vtable_index) break; 205 // else fall through to check vtable index: 206 case CallInfo::vtable_call: 207 assert(resolved_klass()->verify_vtable_index(_call_index), ""); 208 break; 209 case CallInfo::itable_call: 210 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), ""); 211 break; 212 case CallInfo::unknown_kind: 213 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set"); 214 break; 215 default: 216 fatal("Unexpected call kind %d", call_kind()); 217 } 218 } 219 #endif //ASSERT 220 221 #ifndef PRODUCT 222 void CallInfo::print() { 223 ResourceMark rm; 224 const char* kindstr; 225 switch (_call_kind) { 226 case direct_call: kindstr = "direct"; break; 227 case vtable_call: kindstr = "vtable"; break; 228 case itable_call: kindstr = "itable"; break; 229 default : kindstr = "unknown"; break; 230 } 231 tty->print_cr("Call %s@%d %s", kindstr, _call_index, 232 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string()); 233 } 234 #endif 235 236 //------------------------------------------------------------------------------------------------------------------------ 237 // Implementation of LinkInfo 238 239 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) { 240 // resolve klass 241 _resolved_klass = pool->klass_ref_at(index, CHECK); 242 243 // Get name, signature, and static klass 244 _name = pool->name_ref_at(index); 245 _signature = pool->signature_ref_at(index); 246 _tag = pool->tag_ref_at(index); 247 _current_klass = pool->pool_holder(); 248 _current_method = current_method; 249 250 // Coming from the constant pool always checks access 251 _check_access = true; 252 } 253 254 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) { 255 // resolve klass 256 _resolved_klass = pool->klass_ref_at(index, CHECK); 257 258 // Get name, signature, and static klass 259 _name = pool->name_ref_at(index); 260 _signature = pool->signature_ref_at(index); 261 _tag = pool->tag_ref_at(index); 262 _current_klass = pool->pool_holder(); 263 _current_method = methodHandle(); 264 265 // Coming from the constant pool always checks access 266 _check_access = true; 267 } 268 269 char* LinkInfo::method_string() const { 270 return Method::name_and_sig_as_C_string(_resolved_klass, _name, _signature); 271 } 272 273 #ifndef PRODUCT 274 void LinkInfo::print() { 275 ResourceMark rm; 276 tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s", 277 _resolved_klass->name()->as_C_string(), 278 _name->as_C_string(), 279 _signature->as_C_string(), 280 _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(), 281 _check_access ? "true" : "false"); 282 } 283 #endif // PRODUCT 284 //------------------------------------------------------------------------------------------------------------------------ 285 // Klass resolution 286 287 void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass, TRAPS) { 288 Reflection::VerifyClassAccessResults vca_result = 289 Reflection::verify_class_access(ref_klass, InstanceKlass::cast(sel_klass), true); 290 if (vca_result != Reflection::ACCESS_OK) { 291 ResourceMark rm(THREAD); 292 char* msg = Reflection::verify_class_access_msg(ref_klass, 293 InstanceKlass::cast(sel_klass), 294 vca_result); 295 if (msg == NULL) { 296 Exceptions::fthrow( 297 THREAD_AND_LOCATION, 298 vmSymbols::java_lang_IllegalAccessError(), 299 "failed to access class %s from class %s", 300 sel_klass->external_name(), 301 ref_klass->external_name()); 302 } else { 303 // Use module specific message returned by verify_class_access_msg(). 304 Exceptions::fthrow( 305 THREAD_AND_LOCATION, 306 vmSymbols::java_lang_IllegalAccessError(), 307 "%s", msg); 308 } 309 } 310 } 311 312 //------------------------------------------------------------------------------------------------------------------------ 313 // Method resolution 314 // 315 // According to JVM spec. $5.4.3c & $5.4.3d 316 317 // Look up method in klasses, including static methods 318 // Then look up local default methods 319 Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info, 320 bool checkpolymorphism, 321 bool in_imethod_resolve) { 322 NoSafepointVerifier nsv; // Method* returned may not be reclaimed 323 324 Klass* klass = link_info.resolved_klass(); 325 Symbol* name = link_info.name(); 326 Symbol* signature = link_info.signature(); 327 328 // Ignore overpasses so statics can be found during resolution 329 Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass); 330 331 if (klass->is_array_klass()) { 332 // Only consider klass and super klass for arrays 333 return result; 334 } 335 336 InstanceKlass* ik = InstanceKlass::cast(klass); 337 338 // JDK 8, JVMS 5.4.3.4: Interface method resolution should 339 // ignore static and non-public methods of java.lang.Object, 340 // like clone, finalize, registerNatives. 341 if (in_imethod_resolve && 342 result != NULL && 343 ik->is_interface() && 344 (result->is_static() || !result->is_public()) && 345 result->method_holder() == SystemDictionary::Object_klass()) { 346 result = NULL; 347 } 348 349 // Before considering default methods, check for an overpass in the 350 // current class if a method has not been found. 351 if (result == NULL) { 352 result = ik->find_method(name, signature); 353 } 354 355 if (result == NULL) { 356 Array<Method*>* default_methods = ik->default_methods(); 357 if (default_methods != NULL) { 358 result = InstanceKlass::find_method(default_methods, name, signature); 359 } 360 } 361 362 if (checkpolymorphism && result != NULL) { 363 vmIntrinsics::ID iid = result->intrinsic_id(); 364 if (MethodHandles::is_signature_polymorphic(iid)) { 365 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. 366 return NULL; 367 } 368 } 369 return result; 370 } 371 372 // returns first instance method 373 // Looks up method in classes, then looks up local default methods 374 methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass, 375 Symbol* name, 376 Symbol* signature, TRAPS) { 377 Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass); 378 379 while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) { 380 Klass* super_klass = result->method_holder()->super(); 381 result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass); 382 } 383 384 if (klass->is_array_klass()) { 385 // Only consider klass and super klass for arrays 386 return methodHandle(THREAD, result); 387 } 388 389 if (result == NULL) { 390 Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods(); 391 if (default_methods != NULL) { 392 result = InstanceKlass::find_method(default_methods, name, signature); 393 assert(result == NULL || !result->is_static(), "static defaults not allowed"); 394 } 395 } 396 return methodHandle(THREAD, result); 397 } 398 399 int LinkResolver::vtable_index_of_interface_method(Klass* klass, 400 const methodHandle& resolved_method) { 401 402 int vtable_index = Method::invalid_vtable_index; 403 Symbol* name = resolved_method->name(); 404 Symbol* signature = resolved_method->signature(); 405 InstanceKlass* ik = InstanceKlass::cast(klass); 406 407 // First check in default method array 408 if (!resolved_method->is_abstract() && ik->default_methods() != NULL) { 409 int index = InstanceKlass::find_method_index(ik->default_methods(), 410 name, signature, Klass::find_overpass, 411 Klass::find_static, Klass::find_private); 412 if (index >= 0 ) { 413 vtable_index = ik->default_vtable_indices()->at(index); 414 } 415 } 416 if (vtable_index == Method::invalid_vtable_index) { 417 // get vtable_index for miranda methods 418 klassVtable vt = ik->vtable(); 419 vtable_index = vt.index_of_miranda(name, signature); 420 } 421 return vtable_index; 422 } 423 424 Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) { 425 InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass()); 426 427 // Specify 'true' in order to skip default methods when searching the 428 // interfaces. Function lookup_method_in_klasses() already looked for 429 // the method in the default methods table. 430 return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults); 431 } 432 433 methodHandle LinkResolver::lookup_polymorphic_method( 434 const LinkInfo& link_info, 435 Handle *appendix_result_or_null, 436 Handle *method_type_result, 437 TRAPS) { 438 Klass* klass = link_info.resolved_klass(); 439 Symbol* name = link_info.name(); 440 Symbol* full_signature = link_info.signature(); 441 442 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); 443 if (TraceMethodHandles) { 444 ResourceMark rm(THREAD); 445 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", 446 vmIntrinsics::name_at(iid), klass->external_name(), 447 name->as_C_string(), full_signature->as_C_string()); 448 } 449 if ((klass == SystemDictionary::MethodHandle_klass() || 450 klass == SystemDictionary::VarHandle_klass()) && 451 iid != vmIntrinsics::_none) { 452 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { 453 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. 454 // Do not erase last argument type (MemberName) if it is a static linkTo method. 455 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); 456 TempNewSymbol basic_signature = 457 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL); 458 if (TraceMethodHandles) { 459 ResourceMark rm(THREAD); 460 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", 461 name->as_C_string(), 462 full_signature->as_C_string(), 463 basic_signature->as_C_string()); 464 } 465 methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid, 466 basic_signature, 467 CHECK_NULL); 468 if (result.not_null()) { 469 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); 470 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); 471 assert(basic_signature == result->signature(), "predict the result signature"); 472 if (TraceMethodHandles) { 473 ttyLocker ttyl; 474 tty->print("lookup_polymorphic_method => intrinsic "); 475 result->print_on(tty); 476 } 477 } 478 return result; 479 } else if (iid == vmIntrinsics::_invokeGeneric 480 && THREAD->can_call_java() 481 && appendix_result_or_null != NULL) { 482 // This is a method with type-checking semantics. 483 // We will ask Java code to spin an adapter method for it. 484 if (!MethodHandles::enabled()) { 485 // Make sure the Java part of the runtime has been booted up. 486 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); 487 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { 488 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 489 Handle(), 490 Handle(), 491 true, 492 CHECK_NULL); 493 } 494 } 495 496 Handle appendix; 497 Handle method_type; 498 methodHandle result = SystemDictionary::find_method_handle_invoker( 499 klass, 500 name, 501 full_signature, 502 link_info.current_klass(), 503 &appendix, 504 &method_type, 505 CHECK_NULL); 506 if (TraceMethodHandles) { 507 ttyLocker ttyl; 508 tty->print("lookup_polymorphic_method => (via Java) "); 509 result->print_on(tty); 510 tty->print(" lookup_polymorphic_method => appendix = "); 511 if (appendix.is_null()) tty->print_cr("(none)"); 512 else appendix->print_on(tty); 513 } 514 if (result.not_null()) { 515 #ifdef ASSERT 516 ResourceMark rm(THREAD); 517 518 TempNewSymbol basic_signature = 519 MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL); 520 int actual_size_of_params = result->size_of_parameters(); 521 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); 522 // +1 for MethodHandle.this, +1 for trailing MethodType 523 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; 524 if (appendix.not_null()) expected_size_of_params += 1; 525 if (actual_size_of_params != expected_size_of_params) { 526 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); 527 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); 528 result->print(); 529 } 530 assert(actual_size_of_params == expected_size_of_params, 531 "%d != %d", actual_size_of_params, expected_size_of_params); 532 #endif //ASSERT 533 534 assert(appendix_result_or_null != NULL, ""); 535 (*appendix_result_or_null) = appendix; 536 (*method_type_result) = method_type; 537 } 538 return result; 539 } 540 } 541 return NULL; 542 } 543 544 void LinkResolver::check_method_accessability(Klass* ref_klass, 545 Klass* resolved_klass, 546 Klass* sel_klass, 547 const methodHandle& sel_method, 548 TRAPS) { 549 550 AccessFlags flags = sel_method->access_flags(); 551 552 // Special case: arrays always override "clone". JVMS 2.15. 553 // If the resolved klass is an array class, and the declaring class 554 // is java.lang.Object and the method is "clone", set the flags 555 // to public. 556 // 557 // We'll check for the method name first, as that's most likely 558 // to be false (so we'll short-circuit out of these tests). 559 if (sel_method->name() == vmSymbols::clone_name() && 560 sel_klass == SystemDictionary::Object_klass() && 561 resolved_klass->is_array_klass()) { 562 // We need to change "protected" to "public". 563 assert(flags.is_protected(), "clone not protected?"); 564 jint new_flags = flags.as_int(); 565 new_flags = new_flags & (~JVM_ACC_PROTECTED); 566 new_flags = new_flags | JVM_ACC_PUBLIC; 567 flags.set_flags(new_flags); 568 } 569 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); 570 571 if (!Reflection::verify_field_access(ref_klass, 572 resolved_klass, 573 sel_klass, 574 flags, 575 true)) { 576 ResourceMark rm(THREAD); 577 Exceptions::fthrow( 578 THREAD_AND_LOCATION, 579 vmSymbols::java_lang_IllegalAccessError(), 580 "tried to access method %s.%s%s from class %s", 581 sel_klass->external_name(), 582 sel_method->name()->as_C_string(), 583 sel_method->signature()->as_C_string(), 584 ref_klass->external_name() 585 ); 586 return; 587 } 588 } 589 590 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code, 591 const constantPoolHandle& pool, int index, TRAPS) { 592 // This method is used only 593 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call), 594 // and 595 // (2) in Bytecode_invoke::static_target 596 // It appears to fail when applied to an invokeinterface call site. 597 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points. 598 // resolve klass 599 if (code == Bytecodes::_invokedynamic) { 600 Klass* resolved_klass = SystemDictionary::MethodHandle_klass(); 601 Symbol* method_name = vmSymbols::invoke_name(); 602 Symbol* method_signature = pool->signature_ref_at(index); 603 Klass* current_klass = pool->pool_holder(); 604 LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass); 605 return resolve_method(link_info, code, THREAD); 606 } 607 608 LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL); 609 Klass* resolved_klass = link_info.resolved_klass(); 610 611 if (pool->has_preresolution() 612 || (resolved_klass == SystemDictionary::MethodHandle_klass() && 613 MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) { 614 Method* result = ConstantPool::method_at_if_loaded(pool, index); 615 if (result != NULL) { 616 return methodHandle(THREAD, result); 617 } 618 } 619 620 if (code == Bytecodes::_invokeinterface) { 621 return resolve_interface_method(link_info, code, THREAD); 622 } else if (code == Bytecodes::_invokevirtual) { 623 return resolve_method(link_info, code, THREAD); 624 } else if (!resolved_klass->is_interface()) { 625 return resolve_method(link_info, code, THREAD); 626 } else { 627 return resolve_interface_method(link_info, code, THREAD); 628 } 629 } 630 631 // Check and print a loader constraint violation message for method or interface method 632 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info, 633 const methodHandle& resolved_method, 634 const char* method_type, TRAPS) { 635 Handle current_loader(THREAD, link_info.current_klass()->class_loader()); 636 Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader()); 637 638 ResourceMark rm(THREAD); 639 Symbol* failed_type_symbol = 640 SystemDictionary::check_signature_loaders(link_info.signature(), current_loader, 641 resolved_loader, true, CHECK); 642 if (failed_type_symbol != NULL) { 643 const char* msg = "loader constraint violation: when resolving %s" 644 " \"%s\" the class loader (instance of %s) of the current class, %s," 645 " and the class loader (instance of %s) for the method's defining class, %s, have" 646 " different Class objects for the type %s used in the signature"; 647 char* sig = link_info.method_string(); 648 const char* loader1_name = SystemDictionary::loader_name(current_loader()); 649 char* current = link_info.current_klass()->name()->as_C_string(); 650 const char* loader2_name = SystemDictionary::loader_name(resolved_loader()); 651 char* target = resolved_method->method_holder()->name()->as_C_string(); 652 char* failed_type_name = failed_type_symbol->as_C_string(); 653 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) + 654 strlen(current) + strlen(loader2_name) + strlen(target) + 655 strlen(failed_type_name) + strlen(method_type) + 1; 656 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 657 jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name, 658 target, failed_type_name); 659 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 660 } 661 } 662 663 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig, 664 Klass* current_klass, 665 Klass* sel_klass, TRAPS) { 666 Handle ref_loader(THREAD, current_klass->class_loader()); 667 Handle sel_loader(THREAD, sel_klass->class_loader()); 668 669 ResourceMark rm(THREAD); // needed for check_signature_loaders 670 Symbol* failed_type_symbol = 671 SystemDictionary::check_signature_loaders(sig, 672 ref_loader, sel_loader, 673 false, 674 CHECK); 675 if (failed_type_symbol != NULL) { 676 const char* msg = "loader constraint violation: when resolving field" 677 " \"%s\" the class loader (instance of %s) of the referring class, " 678 "%s, and the class loader (instance of %s) for the field's resolved " 679 "type, %s, have different Class objects for that type"; 680 char* field_name = field->as_C_string(); 681 const char* loader1_name = SystemDictionary::loader_name(ref_loader()); 682 char* sel = sel_klass->name()->as_C_string(); 683 const char* loader2_name = SystemDictionary::loader_name(sel_loader()); 684 char* failed_type_name = failed_type_symbol->as_C_string(); 685 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) + 686 strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1; 687 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 688 jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name, 689 failed_type_name); 690 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 691 } 692 } 693 694 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info, 695 Bytecodes::Code code, TRAPS) { 696 697 Handle nested_exception; 698 Klass* resolved_klass = link_info.resolved_klass(); 699 700 // 1. For invokevirtual, cannot call an interface method 701 if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) { 702 ResourceMark rm(THREAD); 703 char buf[200]; 704 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", 705 resolved_klass->external_name()); 706 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 707 } 708 709 // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref 710 if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) { 711 ResourceMark rm(THREAD); 712 char buf[200]; 713 jio_snprintf(buf, sizeof(buf), "Method %s must be Methodref constant", link_info.method_string()); 714 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 715 } 716 717 // 3. lookup method in resolved klass and its super klasses 718 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false)); 719 720 // 4. lookup method in all the interfaces implemented by the resolved klass 721 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy 722 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info)); 723 724 if (resolved_method.is_null()) { 725 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc 726 resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD); 727 if (HAS_PENDING_EXCEPTION) { 728 nested_exception = Handle(THREAD, PENDING_EXCEPTION); 729 CLEAR_PENDING_EXCEPTION; 730 } 731 } 732 } 733 734 // 5. method lookup failed 735 if (resolved_method.is_null()) { 736 ResourceMark rm(THREAD); 737 THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(), 738 Method::name_and_sig_as_C_string(resolved_klass, 739 link_info.name(), 740 link_info.signature()), 741 nested_exception, NULL); 742 } 743 744 // 5. access checks, access checking may be turned off when calling from within the VM. 745 Klass* current_klass = link_info.current_klass(); 746 if (link_info.check_access()) { 747 assert(current_klass != NULL , "current_klass should not be null"); 748 749 // check if method can be accessed by the referring class 750 check_method_accessability(current_klass, 751 resolved_klass, 752 resolved_method->method_holder(), 753 resolved_method, 754 CHECK_NULL); 755 756 // check loader constraints 757 check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL); 758 } 759 760 return resolved_method; 761 } 762 763 static void trace_method_resolution(const char* prefix, 764 Klass* klass, 765 Klass* resolved_klass, 766 const methodHandle& method, 767 bool logitables, 768 int index = -1) { 769 #ifndef PRODUCT 770 ResourceMark rm; 771 Log(itables) logi; 772 LogStream lsi(logi.trace()); 773 Log(vtables) logv; 774 LogStream lsv(logv.trace()); 775 outputStream* st; 776 if (logitables) { 777 st = &lsi; 778 } else { 779 st = &lsv; 780 } 781 st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 782 prefix, 783 (klass == NULL ? "<NULL>" : klass->internal_name()), 784 (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()), 785 Method::name_and_sig_as_C_string(resolved_klass, 786 method->name(), 787 method->signature()), 788 method->method_holder()->internal_name()); 789 method->print_linkage_flags(st); 790 if (index != -1) { 791 st->print("vtable_index:%d", index); 792 } 793 st->cr(); 794 #endif // PRODUCT 795 } 796 797 // Do linktime resolution of a method in the interface within the context of the specied bytecode. 798 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) { 799 800 Klass* resolved_klass = link_info.resolved_klass(); 801 802 // check if klass is interface 803 if (!resolved_klass->is_interface()) { 804 ResourceMark rm(THREAD); 805 char buf[200]; 806 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name()); 807 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 808 } 809 810 // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref 811 if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) { 812 ResourceMark rm(THREAD); 813 char buf[200]; 814 jio_snprintf(buf, sizeof(buf), "Method %s must be InterfaceMethodref constant", link_info.method_string()); 815 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 816 } 817 818 // lookup method in this interface or its super, java.lang.Object 819 // JDK8: also look for static methods 820 methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true)); 821 822 if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { 823 // lookup method in all the super-interfaces 824 resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info)); 825 } 826 827 if (resolved_method.is_null()) { 828 // no method found 829 ResourceMark rm(THREAD); 830 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), 831 Method::name_and_sig_as_C_string(resolved_klass, 832 link_info.name(), 833 link_info.signature())); 834 } 835 836 if (link_info.check_access()) { 837 // JDK8 adds non-public interface methods, and accessability check requirement 838 Klass* current_klass = link_info.current_klass(); 839 840 assert(current_klass != NULL , "current_klass should not be null"); 841 842 // check if method can be accessed by the referring class 843 check_method_accessability(current_klass, 844 resolved_klass, 845 resolved_method->method_holder(), 846 resolved_method, 847 CHECK_NULL); 848 849 check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL); 850 } 851 852 if (code != Bytecodes::_invokestatic && resolved_method->is_static()) { 853 ResourceMark rm(THREAD); 854 char buf[200]; 855 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", 856 Method::name_and_sig_as_C_string(resolved_klass, 857 resolved_method->name(), resolved_method->signature())); 858 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 859 } 860 861 if (code == Bytecodes::_invokeinterface && resolved_method->is_private()) { 862 ResourceMark rm(THREAD); 863 char buf[200]; 864 865 Klass* current_klass = link_info.current_klass(); 866 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s, caller-class:%s", 867 Method::name_and_sig_as_C_string(resolved_klass, 868 resolved_method->name(), 869 resolved_method->signature()), 870 (current_klass == NULL ? "<NULL>" : current_klass->internal_name())); 871 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 872 } 873 874 if (log_develop_is_enabled(Trace, itables)) { 875 char buf[200]; 876 jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:", 877 Bytecodes::name(code)); 878 trace_method_resolution(buf, link_info.current_klass(), resolved_klass, 879 resolved_method, true); 880 } 881 882 return resolved_method; 883 } 884 885 //------------------------------------------------------------------------------------------------------------------------ 886 // Field resolution 887 888 void LinkResolver::check_field_accessability(Klass* ref_klass, 889 Klass* resolved_klass, 890 Klass* sel_klass, 891 const fieldDescriptor& fd, 892 TRAPS) { 893 if (!Reflection::verify_field_access(ref_klass, 894 resolved_klass, 895 sel_klass, 896 fd.access_flags(), 897 true)) { 898 ResourceMark rm(THREAD); 899 Exceptions::fthrow( 900 THREAD_AND_LOCATION, 901 vmSymbols::java_lang_IllegalAccessError(), 902 "tried to access field %s.%s from class %s", 903 sel_klass->external_name(), 904 fd.name()->as_C_string(), 905 ref_klass->external_name() 906 ); 907 return; 908 } 909 } 910 911 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) { 912 LinkInfo link_info(pool, index, method, CHECK); 913 resolve_field(fd, link_info, byte, true, CHECK); 914 } 915 916 void LinkResolver::resolve_field(fieldDescriptor& fd, 917 const LinkInfo& link_info, 918 Bytecodes::Code byte, bool initialize_class, 919 TRAPS) { 920 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 921 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield || 922 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield || 923 (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode"); 924 925 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 926 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield); 927 // Check if there's a resolved klass containing the field 928 Klass* resolved_klass = link_info.resolved_klass(); 929 Symbol* field = link_info.name(); 930 Symbol* sig = link_info.signature(); 931 932 if (resolved_klass == NULL) { 933 ResourceMark rm(THREAD); 934 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 935 } 936 937 // Resolve instance field 938 Klass* sel_klass = resolved_klass->find_field(field, sig, &fd); 939 // check if field exists; i.e., if a klass containing the field def has been selected 940 if (sel_klass == NULL) { 941 ResourceMark rm(THREAD); 942 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 943 } 944 945 if (!link_info.check_access()) 946 // Access checking may be turned off when calling from within the VM. 947 return; 948 949 // check access 950 Klass* current_klass = link_info.current_klass(); 951 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK); 952 953 // check for errors 954 if (is_static != fd.is_static()) { 955 ResourceMark rm(THREAD); 956 char msg[200]; 957 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string()); 958 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 959 } 960 961 // A final field can be modified only 962 // (1) by methods declared in the class declaring the field and 963 // (2) by the <clinit> method (in case of a static field) 964 // or by the <init> method (in case of an instance field). 965 if (is_put && fd.access_flags().is_final()) { 966 ResourceMark rm(THREAD); 967 stringStream ss; 968 969 if (sel_klass != current_klass) { 970 ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class", 971 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(), 972 current_klass->external_name()); 973 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string()); 974 } 975 976 if (fd.constants()->pool_holder()->major_version() >= 53) { 977 methodHandle m = link_info.current_method(); 978 assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes"); 979 bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic && 980 fd.is_static() && 981 !m()->is_static_initializer()); 982 bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) && 983 !fd.is_static() && 984 !m->is_object_initializer()); 985 986 if (is_initialized_static_final_update || is_initialized_instance_final_update) { 987 ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ", 988 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(), 989 m()->name()->as_C_string(), 990 is_static ? "<clinit>" : "<init>"); 991 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string()); 992 } 993 } 994 } 995 996 // initialize resolved_klass if necessary 997 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 998 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 999 // 1000 // note 2: we don't want to force initialization if we are just checking 1001 // if the field access is legal; e.g., during compilation 1002 if (is_static && initialize_class) { 1003 sel_klass->initialize(CHECK); 1004 } 1005 1006 if (sel_klass != current_klass) { 1007 check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK); 1008 } 1009 1010 // return information. note that the klass is set to the actual klass containing the 1011 // field, otherwise access of static fields in superclasses will not work. 1012 } 1013 1014 1015 //------------------------------------------------------------------------------------------------------------------------ 1016 // Invoke resolution 1017 // 1018 // Naming conventions: 1019 // 1020 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 1021 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 1022 // resolved_klass the specified klass (i.e., specified via constant pool index) 1023 // recv_klass the receiver klass 1024 1025 1026 void LinkResolver::resolve_static_call(CallInfo& result, 1027 const LinkInfo& link_info, 1028 bool initialize_class, TRAPS) { 1029 methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK); 1030 1031 // The resolved class can change as a result of this resolution. 1032 Klass* resolved_klass = resolved_method->method_holder(); 1033 1034 // Initialize klass (this should only happen if everything is ok) 1035 if (initialize_class && resolved_klass->should_be_initialized()) { 1036 resolved_klass->initialize(CHECK); 1037 // Use updated LinkInfo to reresolve with resolved method holder 1038 LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(), 1039 link_info.current_klass(), 1040 link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 1041 resolved_method = linktime_resolve_static_method(new_info, CHECK); 1042 } 1043 1044 // setup result 1045 result.set_static(resolved_klass, resolved_method, CHECK); 1046 } 1047 1048 // throws linktime exceptions 1049 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) { 1050 1051 Klass* resolved_klass = link_info.resolved_klass(); 1052 methodHandle resolved_method; 1053 if (!resolved_klass->is_interface()) { 1054 resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL); 1055 } else { 1056 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL); 1057 } 1058 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 1059 1060 // check if static 1061 if (!resolved_method->is_static()) { 1062 ResourceMark rm(THREAD); 1063 char buf[200]; 1064 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass, 1065 resolved_method->name(), 1066 resolved_method->signature())); 1067 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1068 } 1069 return resolved_method; 1070 } 1071 1072 1073 void LinkResolver::resolve_special_call(CallInfo& result, 1074 Handle recv, 1075 const LinkInfo& link_info, 1076 TRAPS) { 1077 methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK); 1078 runtime_resolve_special_method(result, resolved_method, 1079 link_info.resolved_klass(), 1080 link_info.current_klass(), 1081 recv, 1082 link_info.check_access(), CHECK); 1083 } 1084 1085 // throws linktime exceptions 1086 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info, 1087 TRAPS) { 1088 1089 // Invokespecial is called for multiple special reasons: 1090 // <init> 1091 // local private method invocation, for classes and interfaces 1092 // superclass.method, which can also resolve to a default method 1093 // and the selected method is recalculated relative to the direct superclass 1094 // superinterface.method, which explicitly does not check shadowing 1095 Klass* resolved_klass = link_info.resolved_klass(); 1096 methodHandle resolved_method; 1097 1098 if (!resolved_klass->is_interface()) { 1099 resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL); 1100 } else { 1101 resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL); 1102 } 1103 1104 // check if method name is <init>, that it is found in same klass as static type 1105 if (resolved_method->name() == vmSymbols::object_initializer_name() && 1106 resolved_method->method_holder() != resolved_klass) { 1107 ResourceMark rm(THREAD); 1108 Exceptions::fthrow( 1109 THREAD_AND_LOCATION, 1110 vmSymbols::java_lang_NoSuchMethodError(), 1111 "%s: method %s%s not found", 1112 resolved_klass->external_name(), 1113 resolved_method->name()->as_C_string(), 1114 resolved_method->signature()->as_C_string() 1115 ); 1116 return NULL; 1117 } 1118 1119 // check if invokespecial's interface method reference is in an indirect superinterface 1120 Klass* current_klass = link_info.current_klass(); 1121 if (current_klass != NULL && resolved_klass->is_interface()) { 1122 InstanceKlass* ck = InstanceKlass::cast(current_klass); 1123 InstanceKlass *klass_to_check = !ck->is_anonymous() ? 1124 ck : 1125 InstanceKlass::cast(ck->host_klass()); 1126 // Disable verification for the dynamically-generated reflection bytecodes. 1127 bool is_reflect = klass_to_check->is_subclass_of( 1128 SystemDictionary::reflect_MagicAccessorImpl_klass()); 1129 1130 if (!is_reflect && 1131 !klass_to_check->is_same_or_direct_interface(resolved_klass)) { 1132 ResourceMark rm(THREAD); 1133 char buf[200]; 1134 jio_snprintf(buf, sizeof(buf), 1135 "Interface method reference: %s, is in an indirect superinterface of %s", 1136 Method::name_and_sig_as_C_string(resolved_klass, 1137 resolved_method->name(), 1138 resolved_method->signature()), 1139 current_klass->external_name()); 1140 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1141 } 1142 } 1143 1144 // check if not static 1145 if (resolved_method->is_static()) { 1146 ResourceMark rm(THREAD); 1147 char buf[200]; 1148 jio_snprintf(buf, sizeof(buf), 1149 "Expecting non-static method %s", 1150 Method::name_and_sig_as_C_string(resolved_klass, 1151 resolved_method->name(), 1152 resolved_method->signature())); 1153 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1154 } 1155 1156 if (log_develop_is_enabled(Trace, itables)) { 1157 trace_method_resolution("invokespecial resolved method: caller-class:", 1158 current_klass, resolved_klass, resolved_method, true); 1159 } 1160 1161 return resolved_method; 1162 } 1163 1164 // throws runtime exceptions 1165 void LinkResolver::runtime_resolve_special_method(CallInfo& result, 1166 const methodHandle& resolved_method, 1167 Klass* resolved_klass, 1168 Klass* current_klass, 1169 Handle recv, 1170 bool check_access, TRAPS) { 1171 1172 // resolved method is selected method unless we have an old-style lookup 1173 // for a superclass method 1174 // Invokespecial for a superinterface, resolved method is selected method, 1175 // no checks for shadowing 1176 methodHandle sel_method(THREAD, resolved_method()); 1177 1178 if (check_access && 1179 // check if the method is not <init> 1180 resolved_method->name() != vmSymbols::object_initializer_name()) { 1181 1182 // check if this is an old-style super call and do a new lookup if so 1183 // a) check if ACC_SUPER flag is set for the current class 1184 if ((current_klass->is_super() || !AllowNonVirtualCalls) && 1185 // b) check if the class of the resolved_klass is a superclass 1186 // (not supertype in order to exclude interface classes) of the current class. 1187 // This check is not performed for super.invoke for interface methods 1188 // in super interfaces. 1189 current_klass->is_subclass_of(resolved_klass) && 1190 current_klass != resolved_klass) { 1191 // Lookup super method 1192 Klass* super_klass = current_klass->super(); 1193 sel_method = lookup_instance_method_in_klasses(super_klass, 1194 resolved_method->name(), 1195 resolved_method->signature(), CHECK); 1196 // check if found 1197 if (sel_method.is_null()) { 1198 ResourceMark rm(THREAD); 1199 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1200 Method::name_and_sig_as_C_string(resolved_klass, 1201 resolved_method->name(), 1202 resolved_method->signature())); 1203 } 1204 } 1205 1206 // Check that the class of objectref (the receiver) is the current class or interface, 1207 // or a subtype of the current class or interface (the sender), otherwise invokespecial 1208 // throws IllegalAccessError. 1209 // The verifier checks that the sender is a subtype of the class in the I/MR operand. 1210 // The verifier also checks that the receiver is a subtype of the sender, if the sender is 1211 // a class. If the sender is an interface, the check has to be performed at runtime. 1212 InstanceKlass* sender = InstanceKlass::cast(current_klass); 1213 sender = sender->is_anonymous() ? sender->host_klass() : sender; 1214 if (sender->is_interface() && recv.not_null()) { 1215 Klass* receiver_klass = recv->klass(); 1216 if (!receiver_klass->is_subtype_of(sender)) { 1217 ResourceMark rm(THREAD); 1218 char buf[500]; 1219 jio_snprintf(buf, sizeof(buf), 1220 "Receiver class %s must be the current class or a subtype of interface %s", 1221 receiver_klass->name()->as_C_string(), 1222 sender->name()->as_C_string()); 1223 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf); 1224 } 1225 } 1226 } 1227 1228 // check if not static 1229 if (sel_method->is_static()) { 1230 ResourceMark rm(THREAD); 1231 char buf[200]; 1232 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass, 1233 resolved_method->name(), 1234 resolved_method->signature())); 1235 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1236 } 1237 1238 // check if abstract 1239 if (sel_method->is_abstract()) { 1240 ResourceMark rm(THREAD); 1241 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1242 Method::name_and_sig_as_C_string(resolved_klass, 1243 sel_method->name(), 1244 sel_method->signature())); 1245 } 1246 1247 if (log_develop_is_enabled(Trace, itables)) { 1248 trace_method_resolution("invokespecial selected method: resolved-class:", 1249 resolved_klass, resolved_klass, sel_method, true); 1250 } 1251 1252 // setup result 1253 result.set_static(resolved_klass, sel_method, CHECK); 1254 } 1255 1256 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass, 1257 const LinkInfo& link_info, 1258 bool check_null_and_abstract, TRAPS) { 1259 methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK); 1260 runtime_resolve_virtual_method(result, resolved_method, 1261 link_info.resolved_klass(), 1262 recv, receiver_klass, 1263 check_null_and_abstract, CHECK); 1264 } 1265 1266 // throws linktime exceptions 1267 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info, 1268 TRAPS) { 1269 // normal method resolution 1270 methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL); 1271 1272 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1273 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1274 1275 // check if private interface method 1276 Klass* resolved_klass = link_info.resolved_klass(); 1277 Klass* current_klass = link_info.current_klass(); 1278 1279 // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method 1280 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1281 ResourceMark rm(THREAD); 1282 char buf[200]; 1283 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s", 1284 Method::name_and_sig_as_C_string(resolved_klass, 1285 resolved_method->name(), 1286 resolved_method->signature()), 1287 (current_klass == NULL ? "<NULL>" : current_klass->internal_name())); 1288 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1289 } 1290 1291 // check if not static 1292 if (resolved_method->is_static()) { 1293 ResourceMark rm(THREAD); 1294 char buf[200]; 1295 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass, 1296 resolved_method->name(), 1297 resolved_method->signature())); 1298 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1299 } 1300 1301 if (log_develop_is_enabled(Trace, vtables)) { 1302 trace_method_resolution("invokevirtual resolved method: caller-class:", 1303 current_klass, resolved_klass, resolved_method, false); 1304 } 1305 1306 return resolved_method; 1307 } 1308 1309 // throws runtime exceptions 1310 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 1311 const methodHandle& resolved_method, 1312 Klass* resolved_klass, 1313 Handle recv, 1314 Klass* recv_klass, 1315 bool check_null_and_abstract, 1316 TRAPS) { 1317 1318 // setup default return values 1319 int vtable_index = Method::invalid_vtable_index; 1320 methodHandle selected_method; 1321 1322 // runtime method resolution 1323 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 1324 THROW(vmSymbols::java_lang_NullPointerException()); 1325 } 1326 1327 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s 1328 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 1329 // a missing receiver might result in a bogus lookup. 1330 assert(resolved_method->method_holder()->is_linked(), "must be linked"); 1331 1332 // do lookup based on receiver klass using the vtable index 1333 if (resolved_method->method_holder()->is_interface()) { // default or miranda method 1334 vtable_index = vtable_index_of_interface_method(resolved_klass, 1335 resolved_method); 1336 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 1337 1338 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index)); 1339 } else { 1340 // at this point we are sure that resolved_method is virtual and not 1341 // a default or miranda method; therefore, it must have a valid vtable index. 1342 assert(!resolved_method->has_itable_index(), ""); 1343 vtable_index = resolved_method->vtable_index(); 1344 // We could get a negative vtable_index for final methods, 1345 // because as an optimization they are they are never put in the vtable, 1346 // unless they override an existing method. 1347 // If we do get a negative, it means the resolved method is the the selected 1348 // method, and it can never be changed by an override. 1349 if (vtable_index == Method::nonvirtual_vtable_index) { 1350 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 1351 selected_method = resolved_method; 1352 } else { 1353 selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index)); 1354 } 1355 } 1356 1357 // check if method exists 1358 if (selected_method.is_null()) { 1359 ResourceMark rm(THREAD); 1360 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1361 Method::name_and_sig_as_C_string(resolved_klass, 1362 resolved_method->name(), 1363 resolved_method->signature())); 1364 } 1365 1366 // check if abstract 1367 if (check_null_and_abstract && selected_method->is_abstract()) { 1368 ResourceMark rm(THREAD); 1369 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1370 Method::name_and_sig_as_C_string(resolved_klass, 1371 selected_method->name(), 1372 selected_method->signature())); 1373 } 1374 1375 if (log_develop_is_enabled(Trace, vtables)) { 1376 trace_method_resolution("invokevirtual selected method: receiver-class:", 1377 recv_klass, resolved_klass, selected_method, 1378 false, vtable_index); 1379 } 1380 // setup result 1381 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 1382 } 1383 1384 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass, 1385 const LinkInfo& link_info, 1386 bool check_null_and_abstract, TRAPS) { 1387 // throws linktime exceptions 1388 methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK); 1389 runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(), 1390 recv, recv_klass, check_null_and_abstract, CHECK); 1391 } 1392 1393 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info, 1394 TRAPS) { 1395 // normal interface method resolution 1396 methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL); 1397 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1398 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1399 1400 return resolved_method; 1401 } 1402 1403 // throws runtime exceptions 1404 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, 1405 const methodHandle& resolved_method, 1406 Klass* resolved_klass, 1407 Handle recv, 1408 Klass* recv_klass, 1409 bool check_null_and_abstract, TRAPS) { 1410 // check if receiver exists 1411 if (check_null_and_abstract && recv.is_null()) { 1412 THROW(vmSymbols::java_lang_NullPointerException()); 1413 } 1414 1415 // check if receiver klass implements the resolved interface 1416 if (!recv_klass->is_subtype_of(resolved_klass)) { 1417 ResourceMark rm(THREAD); 1418 char buf[200]; 1419 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 1420 recv_klass->external_name(), 1421 resolved_klass->external_name()); 1422 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1423 } 1424 1425 // do lookup based on receiver klass 1426 // This search must match the linktime preparation search for itable initialization 1427 // to correctly enforce loader constraints for interface method inheritance 1428 methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass, 1429 resolved_method->name(), 1430 resolved_method->signature(), CHECK); 1431 if (sel_method.is_null() && !check_null_and_abstract) { 1432 // In theory this is a harmless placeholder value, but 1433 // in practice leaving in null affects the nsk default method tests. 1434 // This needs further study. 1435 sel_method = resolved_method; 1436 } 1437 // check if method exists 1438 if (sel_method.is_null()) { 1439 ResourceMark rm(THREAD); 1440 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1441 Method::name_and_sig_as_C_string(recv_klass, 1442 resolved_method->name(), 1443 resolved_method->signature())); 1444 } 1445 // check access 1446 // Throw Illegal Access Error if sel_method is not public. 1447 if (!sel_method->is_public()) { 1448 ResourceMark rm(THREAD); 1449 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 1450 Method::name_and_sig_as_C_string(recv_klass, 1451 sel_method->name(), 1452 sel_method->signature())); 1453 } 1454 // check if abstract 1455 if (check_null_and_abstract && sel_method->is_abstract()) { 1456 ResourceMark rm(THREAD); 1457 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1458 Method::name_and_sig_as_C_string(recv_klass, 1459 sel_method->name(), 1460 sel_method->signature())); 1461 } 1462 1463 if (log_develop_is_enabled(Trace, itables)) { 1464 trace_method_resolution("invokeinterface selected method: receiver-class:", 1465 recv_klass, resolved_klass, sel_method, true); 1466 } 1467 // setup result 1468 if (!resolved_method->has_itable_index()) { 1469 int vtable_index = resolved_method->vtable_index(); 1470 assert(vtable_index == sel_method->vtable_index(), "sanity check"); 1471 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK); 1472 } else { 1473 int itable_index = resolved_method()->itable_index(); 1474 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK); 1475 } 1476 } 1477 1478 1479 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1480 const LinkInfo& link_info) { 1481 EXCEPTION_MARK; 1482 methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD); 1483 if (HAS_PENDING_EXCEPTION) { 1484 CLEAR_PENDING_EXCEPTION; 1485 return methodHandle(); 1486 } else { 1487 return method_result; 1488 } 1489 } 1490 1491 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1492 const LinkInfo& link_info) { 1493 EXCEPTION_MARK; 1494 methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD); 1495 if (HAS_PENDING_EXCEPTION) { 1496 CLEAR_PENDING_EXCEPTION; 1497 return methodHandle(); 1498 } else { 1499 return method_result; 1500 } 1501 } 1502 1503 methodHandle LinkResolver::resolve_virtual_call_or_null( 1504 Klass* receiver_klass, 1505 const LinkInfo& link_info) { 1506 EXCEPTION_MARK; 1507 CallInfo info; 1508 resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD); 1509 if (HAS_PENDING_EXCEPTION) { 1510 CLEAR_PENDING_EXCEPTION; 1511 return methodHandle(); 1512 } 1513 return info.selected_method(); 1514 } 1515 1516 methodHandle LinkResolver::resolve_interface_call_or_null( 1517 Klass* receiver_klass, 1518 const LinkInfo& link_info) { 1519 EXCEPTION_MARK; 1520 CallInfo info; 1521 resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD); 1522 if (HAS_PENDING_EXCEPTION) { 1523 CLEAR_PENDING_EXCEPTION; 1524 return methodHandle(); 1525 } 1526 return info.selected_method(); 1527 } 1528 1529 int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass, 1530 const LinkInfo& link_info) { 1531 EXCEPTION_MARK; 1532 CallInfo info; 1533 resolve_virtual_call(info, Handle(), receiver_klass, link_info, 1534 /*check_null_or_abstract*/false, THREAD); 1535 if (HAS_PENDING_EXCEPTION) { 1536 CLEAR_PENDING_EXCEPTION; 1537 return Method::invalid_vtable_index; 1538 } 1539 return info.vtable_index(); 1540 } 1541 1542 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) { 1543 EXCEPTION_MARK; 1544 CallInfo info; 1545 resolve_static_call(info, link_info, /*initialize_class*/false, THREAD); 1546 if (HAS_PENDING_EXCEPTION) { 1547 CLEAR_PENDING_EXCEPTION; 1548 return methodHandle(); 1549 } 1550 return info.selected_method(); 1551 } 1552 1553 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) { 1554 EXCEPTION_MARK; 1555 CallInfo info; 1556 resolve_special_call(info, Handle(), link_info, THREAD); 1557 if (HAS_PENDING_EXCEPTION) { 1558 CLEAR_PENDING_EXCEPTION; 1559 return methodHandle(); 1560 } 1561 return info.selected_method(); 1562 } 1563 1564 1565 1566 //------------------------------------------------------------------------------------------------------------------------ 1567 // ConstantPool entries 1568 1569 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) { 1570 switch (byte) { 1571 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1572 case Bytecodes::_invokespecial : resolve_invokespecial (result, recv, pool, index, CHECK); break; 1573 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1574 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1575 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1576 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1577 default : break; 1578 } 1579 return; 1580 } 1581 1582 void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv, 1583 const methodHandle& attached_method, 1584 Bytecodes::Code byte, TRAPS) { 1585 Klass* defc = attached_method->method_holder(); 1586 Symbol* name = attached_method->name(); 1587 Symbol* type = attached_method->signature(); 1588 LinkInfo link_info(defc, name, type); 1589 switch(byte) { 1590 case Bytecodes::_invokevirtual: 1591 resolve_virtual_call(result, recv, recv->klass(), link_info, 1592 /*check_null_and_abstract=*/true, CHECK); 1593 break; 1594 case Bytecodes::_invokeinterface: 1595 resolve_interface_call(result, recv, recv->klass(), link_info, 1596 /*check_null_and_abstract=*/true, CHECK); 1597 break; 1598 case Bytecodes::_invokestatic: 1599 resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK); 1600 break; 1601 case Bytecodes::_invokespecial: 1602 resolve_special_call(result, recv, link_info, CHECK); 1603 break; 1604 default: 1605 fatal("bad call: %s", Bytecodes::name(byte)); 1606 break; 1607 } 1608 } 1609 1610 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) { 1611 LinkInfo link_info(pool, index, CHECK); 1612 resolve_static_call(result, link_info, /*initialize_class*/true, CHECK); 1613 } 1614 1615 1616 void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv, 1617 const constantPoolHandle& pool, int index, TRAPS) { 1618 LinkInfo link_info(pool, index, CHECK); 1619 resolve_special_call(result, recv, link_info, CHECK); 1620 } 1621 1622 1623 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1624 const constantPoolHandle& pool, int index, 1625 TRAPS) { 1626 1627 LinkInfo link_info(pool, index, CHECK); 1628 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass(); 1629 resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK); 1630 } 1631 1632 1633 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) { 1634 LinkInfo link_info(pool, index, CHECK); 1635 Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass(); 1636 resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK); 1637 } 1638 1639 1640 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) { 1641 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1642 LinkInfo link_info(pool, index, CHECK); 1643 if (TraceMethodHandles) { 1644 ResourceMark rm(THREAD); 1645 tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(), 1646 link_info.signature()->as_C_string()); 1647 } 1648 resolve_handle_call(result, link_info, CHECK); 1649 } 1650 1651 void LinkResolver::resolve_handle_call(CallInfo& result, 1652 const LinkInfo& link_info, 1653 TRAPS) { 1654 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1655 Klass* resolved_klass = link_info.resolved_klass(); 1656 assert(resolved_klass == SystemDictionary::MethodHandle_klass() || 1657 resolved_klass == SystemDictionary::VarHandle_klass(), ""); 1658 assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), ""); 1659 Handle resolved_appendix; 1660 Handle resolved_method_type; 1661 methodHandle resolved_method = lookup_polymorphic_method(link_info, 1662 &resolved_appendix, &resolved_method_type, CHECK); 1663 result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK); 1664 } 1665 1666 static void wrap_invokedynamic_exception(TRAPS) { 1667 if (HAS_PENDING_EXCEPTION) { 1668 // See the "Linking Exceptions" section for the invokedynamic instruction 1669 // in JVMS 6.5. 1670 if (PENDING_EXCEPTION->is_a(SystemDictionary::Error_klass())) { 1671 // Pass through an Error, including BootstrapMethodError, any other form 1672 // of linkage error, or say ThreadDeath/OutOfMemoryError 1673 if (TraceMethodHandles) { 1674 tty->print_cr("invokedynamic passes through an Error for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION)); 1675 PENDING_EXCEPTION->print(); 1676 } 1677 return; 1678 } 1679 1680 // Otherwise wrap the exception in a BootstrapMethodError 1681 if (TraceMethodHandles) { 1682 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION)); 1683 PENDING_EXCEPTION->print(); 1684 } 1685 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1686 CLEAR_PENDING_EXCEPTION; 1687 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1688 } 1689 } 1690 1691 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) { 1692 Symbol* method_name = pool->name_ref_at(index); 1693 Symbol* method_signature = pool->signature_ref_at(index); 1694 Klass* current_klass = pool->pool_holder(); 1695 1696 // Resolve the bootstrap specifier (BSM + optional arguments). 1697 Handle bootstrap_specifier; 1698 // Check if CallSite has been bound already: 1699 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); 1700 int pool_index = cpce->constant_pool_index(); 1701 1702 if (cpce->is_f1_null()) { 1703 if (cpce->indy_resolution_failed()) { 1704 ConstantPool::throw_resolution_error(pool, 1705 ResolutionErrorTable::encode_cpcache_index(index), 1706 CHECK); 1707 } 1708 1709 // The initial step in Call Site Specifier Resolution is to resolve the symbolic 1710 // reference to a method handle which will be the bootstrap method for a dynamic 1711 // call site. If resolution for the java.lang.invoke.MethodHandle for the bootstrap 1712 // method fails, then a MethodHandleInError is stored at the corresponding bootstrap 1713 // method's CP index for the CONSTANT_MethodHandle_info. So, there is no need to 1714 // set the indy_rf flag since any subsequent invokedynamic instruction which shares 1715 // this bootstrap method will encounter the resolution of MethodHandleInError. 1716 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD); 1717 wrap_invokedynamic_exception(CHECK); 1718 assert(bsm_info != NULL, ""); 1719 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1720 bootstrap_specifier = Handle(THREAD, bsm_info); 1721 } 1722 if (!cpce->is_f1_null()) { 1723 methodHandle method( THREAD, cpce->f1_as_method()); 1724 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1725 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1726 result.set_handle(method, appendix, method_type, THREAD); 1727 wrap_invokedynamic_exception(CHECK); 1728 return; 1729 } 1730 1731 if (TraceMethodHandles) { 1732 ResourceMark rm(THREAD); 1733 tty->print_cr("resolve_invokedynamic #%d %s %s in %s", 1734 ConstantPool::decode_invokedynamic_index(index), 1735 method_name->as_C_string(), method_signature->as_C_string(), 1736 current_klass->name()->as_C_string()); 1737 tty->print(" BSM info: "); bootstrap_specifier->print(); 1738 } 1739 1740 resolve_dynamic_call(result, bootstrap_specifier, method_name, 1741 method_signature, current_klass, THREAD); 1742 if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1743 int encoded_index = ResolutionErrorTable::encode_cpcache_index(index); 1744 bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index, 1745 encoded_index, 1746 pool()->tag_at(pool_index), 1747 CHECK); 1748 if (!recorded_res_status) { 1749 // Another thread got here just before we did. So, either use the method 1750 // that it resolved or throw the LinkageError exception that it threw. 1751 if (!cpce->is_f1_null()) { 1752 methodHandle method( THREAD, cpce->f1_as_method()); 1753 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1754 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1755 result.set_handle(method, appendix, method_type, THREAD); 1756 wrap_invokedynamic_exception(CHECK); 1757 } else { 1758 assert(cpce->indy_resolution_failed(), "Resolution failure flag not set"); 1759 ConstantPool::throw_resolution_error(pool, encoded_index, CHECK); 1760 } 1761 return; 1762 } 1763 assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set"); 1764 } 1765 } 1766 1767 void LinkResolver::resolve_dynamic_call(CallInfo& result, 1768 Handle bootstrap_specifier, 1769 Symbol* method_name, Symbol* method_signature, 1770 Klass* current_klass, 1771 TRAPS) { 1772 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1773 // The appendix argument is likely to be a freshly-created CallSite. 1774 Handle resolved_appendix; 1775 Handle resolved_method_type; 1776 methodHandle resolved_method = 1777 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1778 bootstrap_specifier, 1779 method_name, method_signature, 1780 &resolved_appendix, 1781 &resolved_method_type, 1782 THREAD); 1783 wrap_invokedynamic_exception(CHECK); 1784 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD); 1785 wrap_invokedynamic_exception(CHECK); 1786 }