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