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