linkResolver.cpp revision 6412:53a41e7cbe05
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/defaultMethods.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "compiler/compileBroker.hpp" 30#include "gc_interface/collectedHeap.inline.hpp" 31#include "interpreter/bytecode.hpp" 32#include "interpreter/interpreterRuntime.hpp" 33#include "interpreter/linkResolver.hpp" 34#include "memory/resourceArea.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/instanceKlass.hpp" 37#include "oops/objArrayOop.hpp" 38#include "prims/methodHandles.hpp" 39#include "prims/nativeLookup.hpp" 40#include "runtime/compilationPolicy.hpp" 41#include "runtime/fieldDescriptor.hpp" 42#include "runtime/frame.inline.hpp" 43#include "runtime/handles.inline.hpp" 44#include "runtime/reflection.hpp" 45#include "runtime/signature.hpp" 46#include "runtime/thread.inline.hpp" 47#include "runtime/vmThread.hpp" 48 49 50//------------------------------------------------------------------------------------------------------------------------ 51// Implementation of CallInfo 52 53 54void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { 55 int vtable_index = Method::nonvirtual_vtable_index; 56 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 57} 58 59 60void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) { 61 // This is only called for interface methods. If the resolved_method 62 // comes from java/lang/Object, it can be the subject of a virtual call, so 63 // we should pick the vtable index from the resolved method. 64 // In that case, the caller must call set_virtual instead of set_interface. 65 assert(resolved_method->method_holder()->is_interface(), ""); 66 assert(itable_index == resolved_method()->itable_index(), ""); 67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK); 68} 69 70void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { 71 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); 72 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), ""); 73 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call); 74 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK); 75 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); 76} 77 78void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) { 79 if (resolved_method.is_null()) { 80 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); 81 } 82 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass(); 83 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || 84 resolved_method->is_compiled_lambda_form(), 85 "linkMethod must return one of these"); 86 int vtable_index = Method::nonvirtual_vtable_index; 87 assert(!resolved_method->has_vtable_index(), ""); 88 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 89 _resolved_appendix = resolved_appendix; 90 _resolved_method_type = resolved_method_type; 91} 92 93void CallInfo::set_common(KlassHandle resolved_klass, 94 KlassHandle selected_klass, 95 methodHandle resolved_method, 96 methodHandle selected_method, 97 CallKind kind, 98 int index, 99 TRAPS) { 100 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); 101 _resolved_klass = resolved_klass; 102 _selected_klass = selected_klass; 103 _resolved_method = resolved_method; 104 _selected_method = selected_method; 105 _call_kind = kind; 106 _call_index = index; 107 _resolved_appendix = Handle(); 108 DEBUG_ONLY(verify()); // verify before making side effects 109 110 if (CompilationPolicy::must_be_compiled(selected_method)) { 111 // This path is unusual, mostly used by the '-Xcomp' stress test mode. 112 113 // Note: with several active threads, the must_be_compiled may be true 114 // while can_be_compiled is false; remove assert 115 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); 116 if (THREAD->is_Compiler_thread()) { 117 // don't force compilation, resolve was on behalf of compiler 118 return; 119 } 120 if (selected_method->method_holder()->is_not_initialized()) { 121 // 'is_not_initialized' means not only '!is_initialized', but also that 122 // initialization has not been started yet ('!being_initialized') 123 // Do not force compilation of methods in uninitialized classes. 124 // Note that doing this would throw an assert later, 125 // in CompileBroker::compile_method. 126 // We sometimes use the link resolver to do reflective lookups 127 // even before classes are initialized. 128 return; 129 } 130 CompileBroker::compile_method(selected_method, InvocationEntryBci, 131 CompilationPolicy::policy()->initial_compile_level(), 132 methodHandle(), 0, "must_be_compiled", CHECK); 133 } 134} 135 136// utility query for unreflecting a method 137CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) { 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 ResourceMark rm; 157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable(); 158 index = LinkResolver::vtable_index_of_interface_method(resolved_klass, 159 resolved_method); 160 assert(index >= 0 , "we should have valid vtable index at this point"); 161 162 kind = CallInfo::vtable_call; 163 } else if (resolved_method->has_vtable_index()) { 164 // Can occur if an interface redeclares a method of Object. 165 166#ifdef ASSERT 167 // Ensure that this is really the case. 168 KlassHandle object_klass = SystemDictionary::Object_klass(); 169 Method * object_resolved_method = object_klass()->vtable()->method_at(index); 170 assert(object_resolved_method->name() == resolved_method->name(), 171 err_msg("Object and interface method names should match at vtable index %d, %s != %s", 172 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string())); 173 assert(object_resolved_method->signature() == resolved_method->signature(), 174 err_msg("Object and interface method signatures should match at vtable index %d, %s != %s", 175 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string())); 176#endif // ASSERT 177 178 kind = CallInfo::vtable_call; 179 } else { 180 // A regular interface call. 181 kind = CallInfo::itable_call; 182 index = resolved_method->itable_index(); 183 } 184 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index)); 185 _call_kind = kind; 186 _call_index = index; 187 _resolved_appendix = Handle(); 188 DEBUG_ONLY(verify()); 189} 190 191#ifdef ASSERT 192void CallInfo::verify() { 193 switch (call_kind()) { // the meaning and allowed value of index depends on kind 194 case CallInfo::direct_call: 195 if (_call_index == Method::nonvirtual_vtable_index) break; 196 // else fall through to check vtable index: 197 case CallInfo::vtable_call: 198 assert(resolved_klass()->verify_vtable_index(_call_index), ""); 199 break; 200 case CallInfo::itable_call: 201 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), ""); 202 break; 203 case CallInfo::unknown_kind: 204 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set"); 205 break; 206 default: 207 fatal(err_msg_res("Unexpected call kind %d", call_kind())); 208 } 209} 210#endif //ASSERT 211 212 213 214//------------------------------------------------------------------------------------------------------------------------ 215// Klass resolution 216 217void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { 218 if (!Reflection::verify_class_access(ref_klass(), 219 sel_klass(), 220 true)) { 221 ResourceMark rm(THREAD); 222 Exceptions::fthrow( 223 THREAD_AND_LOCATION, 224 vmSymbols::java_lang_IllegalAccessError(), 225 "tried to access class %s from class %s", 226 sel_klass->external_name(), 227 ref_klass->external_name() 228 ); 229 return; 230 } 231} 232 233void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 234 Klass* result_oop = pool->klass_ref_at(index, CHECK); 235 result = KlassHandle(THREAD, result_oop); 236} 237 238//------------------------------------------------------------------------------------------------------------------------ 239// Method resolution 240// 241// According to JVM spec. $5.4.3c & $5.4.3d 242 243// Look up method in klasses, including static methods 244// Then look up local default methods 245void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) { 246 // Ignore overpasses so statics can be found during resolution 247 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::skip_overpass); 248 249 // JDK 8, JVMS 5.4.3.4: Interface method resolution should 250 // ignore static and non-public methods of java.lang.Object, 251 // like clone, finalize, registerNatives. 252 if (in_imethod_resolve && 253 result_oop != NULL && 254 klass->is_interface() && 255 (result_oop->is_static() || !result_oop->is_public()) && 256 result_oop->method_holder() == SystemDictionary::Object_klass()) { 257 result_oop = NULL; 258 } 259 260 // Before considering default methods, check for an overpass in the 261 // current class if a method has not been found. 262 if (result_oop == NULL) { 263 result_oop = InstanceKlass::cast(klass())->find_method(name, signature); 264 } 265 266 if (result_oop == NULL) { 267 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 268 if (default_methods != NULL) { 269 result_oop = InstanceKlass::find_method(default_methods, name, signature); 270 } 271 } 272 273 if (checkpolymorphism && result_oop != NULL) { 274 vmIntrinsics::ID iid = result_oop->intrinsic_id(); 275 if (MethodHandles::is_signature_polymorphic(iid)) { 276 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. 277 return; 278 } 279 } 280 result = methodHandle(THREAD, result_oop); 281} 282 283// returns first instance method 284// Looks up method in classes, then looks up local default methods 285void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 286 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::normal); 287 result = methodHandle(THREAD, result_oop); 288 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) { 289 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super()); 290 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::normal)); 291 } 292 293 if (result.is_null()) { 294 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 295 if (default_methods != NULL) { 296 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature)); 297 assert(result.is_null() || !result->is_static(), "static defaults not allowed"); 298 } 299 } 300} 301 302int LinkResolver::vtable_index_of_interface_method(KlassHandle klass, 303 methodHandle resolved_method) { 304 305 int vtable_index = Method::invalid_vtable_index; 306 Symbol* name = resolved_method->name(); 307 Symbol* signature = resolved_method->signature(); 308 309 // First check in default method array 310 if (!resolved_method->is_abstract() && 311 (InstanceKlass::cast(klass())->default_methods() != NULL)) { 312 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature, false); 313 if (index >= 0 ) { 314 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index); 315 } 316 } 317 if (vtable_index == Method::invalid_vtable_index) { 318 // get vtable_index for miranda methods 319 ResourceMark rm; 320 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); 321 vtable_index = vt->index_of_miranda(name, signature); 322 } 323 return vtable_index; 324} 325 326void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 327 InstanceKlass *ik = InstanceKlass::cast(klass()); 328 329 // Specify 'true' in order to skip default methods when searching the 330 // interfaces. Function lookup_method_in_klasses() already looked for 331 // the method in the default methods table. 332 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, Klass::skip_defaults)); 333} 334 335void LinkResolver::lookup_polymorphic_method(methodHandle& result, 336 KlassHandle klass, Symbol* name, Symbol* full_signature, 337 KlassHandle current_klass, 338 Handle *appendix_result_or_null, 339 Handle *method_type_result, 340 TRAPS) { 341 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); 342 if (TraceMethodHandles) { 343 ResourceMark rm(THREAD); 344 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", 345 vmIntrinsics::name_at(iid), klass->external_name(), 346 name->as_C_string(), full_signature->as_C_string()); 347 } 348 if (klass() == SystemDictionary::MethodHandle_klass() && 349 iid != vmIntrinsics::_none) { 350 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { 351 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. 352 // Do not erase last argument type (MemberName) if it is a static linkTo method. 353 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); 354 TempNewSymbol basic_signature = 355 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); 356 if (TraceMethodHandles) { 357 ResourceMark rm(THREAD); 358 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", 359 name->as_C_string(), 360 full_signature->as_C_string(), 361 basic_signature->as_C_string()); 362 } 363 result = SystemDictionary::find_method_handle_intrinsic(iid, 364 basic_signature, 365 CHECK); 366 if (result.not_null()) { 367 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); 368 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); 369 assert(basic_signature == result->signature(), "predict the result signature"); 370 if (TraceMethodHandles) { 371 tty->print("lookup_polymorphic_method => intrinsic "); 372 result->print_on(tty); 373 } 374 return; 375 } 376 } else if (iid == vmIntrinsics::_invokeGeneric 377 && !THREAD->is_Compiler_thread() 378 && appendix_result_or_null != NULL) { 379 // This is a method with type-checking semantics. 380 // We will ask Java code to spin an adapter method for it. 381 if (!MethodHandles::enabled()) { 382 // Make sure the Java part of the runtime has been booted up. 383 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); 384 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { 385 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 386 Handle(), 387 Handle(), 388 true, 389 CHECK); 390 } 391 } 392 393 Handle appendix; 394 Handle method_type; 395 result = SystemDictionary::find_method_handle_invoker(name, 396 full_signature, 397 current_klass, 398 &appendix, 399 &method_type, 400 CHECK); 401 if (TraceMethodHandles) { 402 tty->print("lookup_polymorphic_method => (via Java) "); 403 result->print_on(tty); 404 tty->print(" lookup_polymorphic_method => appendix = "); 405 if (appendix.is_null()) tty->print_cr("(none)"); 406 else appendix->print_on(tty); 407 } 408 if (result.not_null()) { 409#ifdef ASSERT 410 ResourceMark rm(THREAD); 411 412 TempNewSymbol basic_signature = 413 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); 414 int actual_size_of_params = result->size_of_parameters(); 415 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); 416 // +1 for MethodHandle.this, +1 for trailing MethodType 417 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; 418 if (appendix.not_null()) expected_size_of_params += 1; 419 if (actual_size_of_params != expected_size_of_params) { 420 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); 421 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); 422 result->print(); 423 } 424 assert(actual_size_of_params == expected_size_of_params, 425 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); 426#endif //ASSERT 427 428 assert(appendix_result_or_null != NULL, ""); 429 (*appendix_result_or_null) = appendix; 430 (*method_type_result) = method_type; 431 return; 432 } 433 } 434 } 435} 436 437void LinkResolver::check_method_accessability(KlassHandle ref_klass, 438 KlassHandle resolved_klass, 439 KlassHandle sel_klass, 440 methodHandle sel_method, 441 TRAPS) { 442 443 AccessFlags flags = sel_method->access_flags(); 444 445 // Special case: arrays always override "clone". JVMS 2.15. 446 // If the resolved klass is an array class, and the declaring class 447 // is java.lang.Object and the method is "clone", set the flags 448 // to public. 449 // 450 // We'll check for the method name first, as that's most likely 451 // to be false (so we'll short-circuit out of these tests). 452 if (sel_method->name() == vmSymbols::clone_name() && 453 sel_klass() == SystemDictionary::Object_klass() && 454 resolved_klass->oop_is_array()) { 455 // We need to change "protected" to "public". 456 assert(flags.is_protected(), "clone not protected?"); 457 jint new_flags = flags.as_int(); 458 new_flags = new_flags & (~JVM_ACC_PROTECTED); 459 new_flags = new_flags | JVM_ACC_PUBLIC; 460 flags.set_flags(new_flags); 461 } 462// assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); 463 464 if (!Reflection::verify_field_access(ref_klass(), 465 resolved_klass(), 466 sel_klass(), 467 flags, 468 true)) { 469 ResourceMark rm(THREAD); 470 Exceptions::fthrow( 471 THREAD_AND_LOCATION, 472 vmSymbols::java_lang_IllegalAccessError(), 473 "tried to access method %s.%s%s from class %s", 474 sel_klass->external_name(), 475 sel_method->name()->as_C_string(), 476 sel_method->signature()->as_C_string(), 477 ref_klass->external_name() 478 ); 479 return; 480 } 481} 482 483void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, 484 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { 485 // This method is used only 486 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call), 487 // and 488 // (2) in Bytecode_invoke::static_target 489 // It appears to fail when applied to an invokeinterface call site. 490 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points. 491 // resolve klass 492 if (code == Bytecodes::_invokedynamic) { 493 resolved_klass = SystemDictionary::MethodHandle_klass(); 494 Symbol* method_name = vmSymbols::invoke_name(); 495 Symbol* method_signature = pool->signature_ref_at(index); 496 KlassHandle current_klass(THREAD, pool->pool_holder()); 497 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 498 return; 499 } 500 501 resolve_klass(resolved_klass, pool, index, CHECK); 502 503 Symbol* method_name = pool->name_ref_at(index); 504 Symbol* method_signature = pool->signature_ref_at(index); 505 KlassHandle current_klass(THREAD, pool->pool_holder()); 506 507 if (pool->has_preresolution() 508 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && 509 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { 510 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); 511 if (result_oop != NULL) { 512 resolved_method = methodHandle(THREAD, result_oop); 513 return; 514 } 515 } 516 517 if (code == Bytecodes::_invokeinterface) { 518 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 519 } else if (code == Bytecodes::_invokevirtual) { 520 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 521 } else if (!resolved_klass->is_interface()) { 522 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 523 } else { 524 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true; 525 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK); 526 } 527} 528 529void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, 530 Symbol* method_name, Symbol* method_signature, 531 KlassHandle current_klass, bool check_access, 532 bool require_methodref, TRAPS) { 533 534 Handle nested_exception; 535 536 // 1. check if methodref required, that resolved_klass is not interfacemethodref 537 if (require_methodref && resolved_klass->is_interface()) { 538 ResourceMark rm(THREAD); 539 char buf[200]; 540 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", 541 resolved_klass()->external_name()); 542 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 543 } 544 545 // 2. lookup method in resolved klass and its super klasses 546 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK); 547 548 if (resolved_method.is_null()) { // not found in the class hierarchy 549 // 3. lookup method in all the interfaces implemented by the resolved klass 550 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 551 552 if (resolved_method.is_null()) { 553 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc 554 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, 555 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); 556 if (HAS_PENDING_EXCEPTION) { 557 nested_exception = Handle(THREAD, PENDING_EXCEPTION); 558 CLEAR_PENDING_EXCEPTION; 559 } 560 } 561 562 if (resolved_method.is_null()) { 563 // 4. method lookup failed 564 ResourceMark rm(THREAD); 565 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), 566 Method::name_and_sig_as_C_string(resolved_klass(), 567 method_name, 568 method_signature), 569 nested_exception); 570 } 571 } 572 573 // 5. access checks, access checking may be turned off when calling from within the VM. 574 if (check_access) { 575 assert(current_klass.not_null() , "current_klass should not be null"); 576 577 // check if method can be accessed by the referring class 578 check_method_accessability(current_klass, 579 resolved_klass, 580 KlassHandle(THREAD, resolved_method->method_holder()), 581 resolved_method, 582 CHECK); 583 584 // check loader constraints 585 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 586 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 587 { 588 ResourceMark rm(THREAD); 589 Symbol* failed_type_symbol = 590 SystemDictionary::check_signature_loaders(method_signature, loader, 591 class_loader, true, CHECK); 592 if (failed_type_symbol != NULL) { 593 const char* msg = "loader constraint violation: when resolving method" 594 " \"%s\" the class loader (instance of %s) of the current class, %s," 595 " and the class loader (instance of %s) for the method's defining class, %s, have" 596 " different Class objects for the type %s used in the signature"; 597 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 598 const char* loader1 = SystemDictionary::loader_name(loader()); 599 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 600 const char* loader2 = SystemDictionary::loader_name(class_loader()); 601 char* target = InstanceKlass::cast(resolved_method->method_holder()) 602 ->name()->as_C_string(); 603 char* failed_type_name = failed_type_symbol->as_C_string(); 604 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 605 strlen(current) + strlen(loader2) + strlen(target) + 606 strlen(failed_type_name) + 1; 607 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 608 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 609 target, failed_type_name); 610 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 611 } 612 } 613 } 614} 615 616void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 617 KlassHandle resolved_klass, 618 Symbol* method_name, 619 Symbol* method_signature, 620 KlassHandle current_klass, 621 bool check_access, 622 bool nostatics, TRAPS) { 623 624 // check if klass is interface 625 if (!resolved_klass->is_interface()) { 626 ResourceMark rm(THREAD); 627 char buf[200]; 628 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); 629 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 630 } 631 632 // lookup method in this interface or its super, java.lang.Object 633 // JDK8: also look for static methods 634 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK); 635 636 if (resolved_method.is_null()) { 637 // lookup method in all the super-interfaces 638 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 639 if (resolved_method.is_null()) { 640 // no method found 641 ResourceMark rm(THREAD); 642 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 643 Method::name_and_sig_as_C_string(resolved_klass(), 644 method_name, 645 method_signature)); 646 } 647 } 648 649 if (check_access) { 650 // JDK8 adds non-public interface methods, and accessability check requirement 651 assert(current_klass.not_null() , "current_klass should not be null"); 652 653 // check if method can be accessed by the referring class 654 check_method_accessability(current_klass, 655 resolved_klass, 656 KlassHandle(THREAD, resolved_method->method_holder()), 657 resolved_method, 658 CHECK); 659 660 HandleMark hm(THREAD); 661 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 662 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 663 { 664 ResourceMark rm(THREAD); 665 Symbol* failed_type_symbol = 666 SystemDictionary::check_signature_loaders(method_signature, loader, 667 class_loader, true, CHECK); 668 if (failed_type_symbol != NULL) { 669 const char* msg = "loader constraint violation: when resolving " 670 "interface method \"%s\" the class loader (instance of %s) of the " 671 "current class, %s, and the class loader (instance of %s) for " 672 "the method's defining class, %s, have different Class objects for the type %s " 673 "used in the signature"; 674 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 675 const char* loader1 = SystemDictionary::loader_name(loader()); 676 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 677 const char* loader2 = SystemDictionary::loader_name(class_loader()); 678 char* target = InstanceKlass::cast(resolved_method->method_holder()) 679 ->name()->as_C_string(); 680 char* failed_type_name = failed_type_symbol->as_C_string(); 681 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 682 strlen(current) + strlen(loader2) + strlen(target) + 683 strlen(failed_type_name) + 1; 684 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 685 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 686 target, failed_type_name); 687 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 688 } 689 } 690 } 691 692 if (nostatics && resolved_method->is_static()) { 693 ResourceMark rm(THREAD); 694 char buf[200]; 695 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", 696 Method::name_and_sig_as_C_string(resolved_klass(), 697 resolved_method->name(), resolved_method->signature())); 698 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 699 } 700 701 if (TraceItables && Verbose) { 702 ResourceMark rm(THREAD); 703 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 704 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 705 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 706 Method::name_and_sig_as_C_string(resolved_klass(), 707 resolved_method->name(), 708 resolved_method->signature()), 709 resolved_method->method_holder()->internal_name() 710 ); 711 resolved_method->access_flags().print_on(tty); 712 if (resolved_method->is_default_method()) { 713 tty->print("default "); 714 } 715 if (resolved_method->is_overpass()) { 716 tty->print("overpass"); 717 } 718 tty->cr(); 719 } 720} 721 722//------------------------------------------------------------------------------------------------------------------------ 723// Field resolution 724 725void LinkResolver::check_field_accessability(KlassHandle ref_klass, 726 KlassHandle resolved_klass, 727 KlassHandle sel_klass, 728 fieldDescriptor& fd, 729 TRAPS) { 730 if (!Reflection::verify_field_access(ref_klass(), 731 resolved_klass(), 732 sel_klass(), 733 fd.access_flags(), 734 true)) { 735 ResourceMark rm(THREAD); 736 Exceptions::fthrow( 737 THREAD_AND_LOCATION, 738 vmSymbols::java_lang_IllegalAccessError(), 739 "tried to access field %s.%s from class %s", 740 sel_klass->external_name(), 741 fd.name()->as_C_string(), 742 ref_klass->external_name() 743 ); 744 return; 745 } 746} 747 748void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 749 // Load these early in case the resolve of the containing klass fails 750 Symbol* field = pool->name_ref_at(index); 751 Symbol* sig = pool->signature_ref_at(index); 752 753 // resolve specified klass 754 KlassHandle resolved_klass; 755 resolve_klass(resolved_klass, pool, index, CHECK); 756 757 KlassHandle current_klass(THREAD, pool->pool_holder()); 758 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK); 759} 760 761void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig, 762 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class, 763 TRAPS) { 764 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 765 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield || 766 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode"); 767 768 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 769 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); 770 771 // Check if there's a resolved klass containing the field 772 if (resolved_klass.is_null()) { 773 ResourceMark rm(THREAD); 774 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 775 } 776 777 // Resolve instance field 778 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); 779 // check if field exists; i.e., if a klass containing the field def has been selected 780 if (sel_klass.is_null()) { 781 ResourceMark rm(THREAD); 782 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 783 } 784 785 if (!check_access) 786 // Access checking may be turned off when calling from within the VM. 787 return; 788 789 // check access 790 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK); 791 792 // check for errors 793 if (is_static != fd.is_static()) { 794 ResourceMark rm(THREAD); 795 char msg[200]; 796 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string()); 797 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 798 } 799 800 // Final fields can only be accessed from its own class. 801 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) { 802 THROW(vmSymbols::java_lang_IllegalAccessError()); 803 } 804 805 // initialize resolved_klass if necessary 806 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 807 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 808 // 809 // note 2: we don't want to force initialization if we are just checking 810 // if the field access is legal; e.g., during compilation 811 if (is_static && initialize_class) { 812 sel_klass->initialize(CHECK); 813 } 814 815 if (sel_klass() != current_klass()) { 816 HandleMark hm(THREAD); 817 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 818 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); 819 { 820 ResourceMark rm(THREAD); 821 Symbol* failed_type_symbol = 822 SystemDictionary::check_signature_loaders(sig, 823 ref_loader, sel_loader, 824 false, 825 CHECK); 826 if (failed_type_symbol != NULL) { 827 const char* msg = "loader constraint violation: when resolving field" 828 " \"%s\" the class loader (instance of %s) of the referring class, " 829 "%s, and the class loader (instance of %s) for the field's resolved " 830 "type, %s, have different Class objects for that type"; 831 char* field_name = field->as_C_string(); 832 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 833 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); 834 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 835 char* failed_type_name = failed_type_symbol->as_C_string(); 836 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 837 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1; 838 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 839 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 840 failed_type_name); 841 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 842 } 843 } 844 } 845 846 // return information. note that the klass is set to the actual klass containing the 847 // field, otherwise access of static fields in superclasses will not work. 848} 849 850 851//------------------------------------------------------------------------------------------------------------------------ 852// Invoke resolution 853// 854// Naming conventions: 855// 856// resolved_method the specified method (i.e., static receiver specified via constant pool index) 857// sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 858// resolved_klass the specified klass (i.e., specified via constant pool index) 859// recv_klass the receiver klass 860 861 862void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 863 Symbol* method_signature, KlassHandle current_klass, 864 bool check_access, bool initialize_class, TRAPS) { 865 methodHandle resolved_method; 866 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 867 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); 868 869 // Initialize klass (this should only happen if everything is ok) 870 if (initialize_class && resolved_klass->should_be_initialized()) { 871 resolved_klass->initialize(CHECK); 872 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 873 } 874 875 // setup result 876 result.set_static(resolved_klass, resolved_method, CHECK); 877} 878 879// throws linktime exceptions 880void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 881 Symbol* method_name, Symbol* method_signature, 882 KlassHandle current_klass, bool check_access, TRAPS) { 883 884 if (!resolved_klass->is_interface()) { 885 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 886 } else { 887 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 888 } 889 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 890 891 // check if static 892 if (!resolved_method->is_static()) { 893 ResourceMark rm(THREAD); 894 char buf[200]; 895 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 896 resolved_method->name(), 897 resolved_method->signature())); 898 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 899 } 900} 901 902 903void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 904 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 905 methodHandle resolved_method; 906 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 907 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 908} 909 910// throws linktime exceptions 911void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 912 Symbol* method_name, Symbol* method_signature, 913 KlassHandle current_klass, bool check_access, TRAPS) { 914 915 // Invokespecial is called for multiple special reasons: 916 // <init> 917 // local private method invocation, for classes and interfaces 918 // superclass.method, which can also resolve to a default method 919 // and the selected method is recalculated relative to the direct superclass 920 // superinterface.method, which explicitly does not check shadowing 921 922 if (!resolved_klass->is_interface()) { 923 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 924 } else { 925 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 926 } 927 928 // check if method name is <init>, that it is found in same klass as static type 929 if (resolved_method->name() == vmSymbols::object_initializer_name() && 930 resolved_method->method_holder() != resolved_klass()) { 931 ResourceMark rm(THREAD); 932 Exceptions::fthrow( 933 THREAD_AND_LOCATION, 934 vmSymbols::java_lang_NoSuchMethodError(), 935 "%s: method %s%s not found", 936 resolved_klass->external_name(), 937 resolved_method->name()->as_C_string(), 938 resolved_method->signature()->as_C_string() 939 ); 940 return; 941 } 942 943 // check if invokespecial's interface method reference is in an indirect superinterface 944 if (!current_klass.is_null() && resolved_klass->is_interface()) { 945 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ? 946 current_klass() : 947 InstanceKlass::cast(current_klass())->host_klass(); 948 // As of the fix for 4486457 we disable verification for all of the 949 // dynamically-generated bytecodes associated with the 1.4 950 // reflection implementation, not just those associated with 951 // sun/reflect/SerializationConstructorAccessor. 952 bool is_reflect = JDK_Version::is_gte_jdk14x_version() && 953 UseNewReflection && 954 klass_to_check->is_subclass_of( 955 SystemDictionary::reflect_MagicAccessorImpl_klass()); 956 957 if (!is_reflect && 958 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) { 959 ResourceMark rm(THREAD); 960 char buf[200]; 961 jio_snprintf(buf, sizeof(buf), 962 "Interface method reference: %s, is in an indirect superinterface of %s", 963 Method::name_and_sig_as_C_string(resolved_klass(), 964 resolved_method->name(), 965 resolved_method->signature()), 966 current_klass->external_name()); 967 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 968 } 969 } 970 971 // check if not static 972 if (resolved_method->is_static()) { 973 ResourceMark rm(THREAD); 974 char buf[200]; 975 jio_snprintf(buf, sizeof(buf), 976 "Expecting non-static method %s", 977 Method::name_and_sig_as_C_string(resolved_klass(), 978 resolved_method->name(), 979 resolved_method->signature())); 980 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 981 } 982 983 if (TraceItables && Verbose) { 984 ResourceMark rm(THREAD); 985 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 986 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 987 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 988 Method::name_and_sig_as_C_string(resolved_klass(), 989 resolved_method->name(), 990 resolved_method->signature()), 991 resolved_method->method_holder()->internal_name() 992 ); 993 resolved_method->access_flags().print_on(tty); 994 if (resolved_method->is_default_method()) { 995 tty->print("default "); 996 } 997 if (resolved_method->is_overpass()) { 998 tty->print("overpass"); 999 } 1000 tty->cr(); 1001 } 1002} 1003 1004// throws runtime exceptions 1005void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1006 KlassHandle current_klass, bool check_access, TRAPS) { 1007 1008 // resolved method is selected method unless we have an old-style lookup 1009 // for a superclass method 1010 // Invokespecial for a superinterface, resolved method is selected method, 1011 // no checks for shadowing 1012 methodHandle sel_method(THREAD, resolved_method()); 1013 1014 // check if this is an old-style super call and do a new lookup if so 1015 { KlassHandle method_klass = KlassHandle(THREAD, 1016 resolved_method->method_holder()); 1017 1018 if (check_access && 1019 // a) check if ACC_SUPER flag is set for the current class 1020 (current_klass->is_super() || !AllowNonVirtualCalls) && 1021 // b) check if the class of the resolved_klass is a superclass 1022 // (not supertype in order to exclude interface classes) of the current class. 1023 // This check is not performed for super.invoke for interface methods 1024 // in super interfaces. 1025 current_klass->is_subclass_of(resolved_klass()) && 1026 current_klass() != resolved_klass() && 1027 // c) check if the method is not <init> 1028 resolved_method->name() != vmSymbols::object_initializer_name()) { 1029 // Lookup super method 1030 KlassHandle super_klass(THREAD, current_klass->super()); 1031 lookup_instance_method_in_klasses(sel_method, super_klass, 1032 resolved_method->name(), 1033 resolved_method->signature(), CHECK); 1034 // check if found 1035 if (sel_method.is_null()) { 1036 ResourceMark rm(THREAD); 1037 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1038 Method::name_and_sig_as_C_string(resolved_klass(), 1039 resolved_method->name(), 1040 resolved_method->signature())); 1041 } 1042 } 1043 } 1044 1045 // check if not static 1046 if (sel_method->is_static()) { 1047 ResourceMark rm(THREAD); 1048 char buf[200]; 1049 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1050 resolved_method->name(), 1051 resolved_method->signature())); 1052 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1053 } 1054 1055 // check if abstract 1056 if (sel_method->is_abstract()) { 1057 ResourceMark rm(THREAD); 1058 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1059 Method::name_and_sig_as_C_string(resolved_klass(), 1060 sel_method->name(), 1061 sel_method->signature())); 1062 } 1063 1064 if (TraceItables && Verbose) { 1065 ResourceMark rm(THREAD); 1066 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1067 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1068 Method::name_and_sig_as_C_string(resolved_klass(), 1069 sel_method->name(), 1070 sel_method->signature()), 1071 sel_method->method_holder()->internal_name() 1072 ); 1073 sel_method->access_flags().print_on(tty); 1074 if (sel_method->is_default_method()) { 1075 tty->print("default "); 1076 } 1077 if (sel_method->is_overpass()) { 1078 tty->print("overpass"); 1079 } 1080 tty->cr(); 1081 } 1082 1083 // setup result 1084 result.set_static(resolved_klass, sel_method, CHECK); 1085} 1086 1087void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 1088 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1089 bool check_access, bool check_null_and_abstract, TRAPS) { 1090 methodHandle resolved_method; 1091 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1092 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 1093} 1094 1095// throws linktime exceptions 1096void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 1097 Symbol* method_name, Symbol* method_signature, 1098 KlassHandle current_klass, bool check_access, TRAPS) { 1099 // normal method resolution 1100 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1101 1102 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1103 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1104 1105 // check if private interface method 1106 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1107 ResourceMark rm(THREAD); 1108 char buf[200]; 1109 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s", 1110 Method::name_and_sig_as_C_string(resolved_klass(), 1111 resolved_method->name(), 1112 resolved_method->signature()), 1113 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name())); 1114 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1115 } 1116 1117 // check if not static 1118 if (resolved_method->is_static()) { 1119 ResourceMark rm(THREAD); 1120 char buf[200]; 1121 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1122 resolved_method->name(), 1123 resolved_method->signature())); 1124 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1125 } 1126 1127 if (PrintVtables && Verbose) { 1128 ResourceMark rm(THREAD); 1129 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 1130 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 1131 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1132 Method::name_and_sig_as_C_string(resolved_klass(), 1133 resolved_method->name(), 1134 resolved_method->signature()), 1135 resolved_method->method_holder()->internal_name() 1136 ); 1137 resolved_method->access_flags().print_on(tty); 1138 if (resolved_method->is_default_method()) { 1139 tty->print("default "); 1140 } 1141 if (resolved_method->is_overpass()) { 1142 tty->print("overpass"); 1143 } 1144 tty->cr(); 1145 } 1146} 1147 1148// throws runtime exceptions 1149void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 1150 methodHandle resolved_method, 1151 KlassHandle resolved_klass, 1152 Handle recv, 1153 KlassHandle recv_klass, 1154 bool check_null_and_abstract, 1155 TRAPS) { 1156 1157 // setup default return values 1158 int vtable_index = Method::invalid_vtable_index; 1159 methodHandle selected_method; 1160 1161 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 1162 1163 // runtime method resolution 1164 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 1165 THROW(vmSymbols::java_lang_NullPointerException()); 1166 } 1167 1168 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s 1169 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 1170 // a missing receiver might result in a bogus lookup. 1171 assert(resolved_method->method_holder()->is_linked(), "must be linked"); 1172 1173 // do lookup based on receiver klass using the vtable index 1174 if (resolved_method->method_holder()->is_interface()) { // miranda method 1175 vtable_index = vtable_index_of_interface_method(resolved_klass, 1176 resolved_method); 1177 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 1178 1179 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); 1180 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1181 } else { 1182 // at this point we are sure that resolved_method is virtual and not 1183 // a miranda method; therefore, it must have a valid vtable index. 1184 assert(!resolved_method->has_itable_index(), ""); 1185 vtable_index = resolved_method->vtable_index(); 1186 // We could get a negative vtable_index for final methods, 1187 // because as an optimization they are they are never put in the vtable, 1188 // unless they override an existing method. 1189 // If we do get a negative, it means the resolved method is the the selected 1190 // method, and it can never be changed by an override. 1191 if (vtable_index == Method::nonvirtual_vtable_index) { 1192 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 1193 selected_method = resolved_method; 1194 } else { 1195 // recv_klass might be an arrayKlassOop but all vtables start at 1196 // the same place. The cast is to avoid virtual call and assertion. 1197 InstanceKlass* inst = (InstanceKlass*)recv_klass(); 1198 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1199 } 1200 } 1201 1202 // check if method exists 1203 if (selected_method.is_null()) { 1204 ResourceMark rm(THREAD); 1205 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1206 Method::name_and_sig_as_C_string(resolved_klass(), 1207 resolved_method->name(), 1208 resolved_method->signature())); 1209 } 1210 1211 // check if abstract 1212 if (check_null_and_abstract && selected_method->is_abstract()) { 1213 ResourceMark rm(THREAD); 1214 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1215 Method::name_and_sig_as_C_string(resolved_klass(), 1216 selected_method->name(), 1217 selected_method->signature())); 1218 } 1219 1220 if (PrintVtables && Verbose) { 1221 ResourceMark rm(THREAD); 1222 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ", 1223 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1224 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1225 Method::name_and_sig_as_C_string(resolved_klass(), 1226 resolved_method->name(), 1227 resolved_method->signature()), 1228 selected_method->method_holder()->internal_name(), 1229 vtable_index 1230 ); 1231 selected_method->access_flags().print_on(tty); 1232 if (selected_method->is_default_method()) { 1233 tty->print("default "); 1234 } 1235 if (selected_method->is_overpass()) { 1236 tty->print("overpass"); 1237 } 1238 tty->cr(); 1239 } 1240 // setup result 1241 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 1242} 1243 1244void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 1245 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1246 bool check_access, bool check_null_and_abstract, TRAPS) { 1247 methodHandle resolved_method; 1248 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1249 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 1250} 1251 1252// throws linktime exceptions 1253void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 1254 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 1255 // normal interface method resolution 1256 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1257 1258 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1259 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1260} 1261 1262// throws runtime exceptions 1263void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1264 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 1265 // check if receiver exists 1266 if (check_null_and_abstract && recv.is_null()) { 1267 THROW(vmSymbols::java_lang_NullPointerException()); 1268 } 1269 1270 // check if private interface method 1271 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1272 ResourceMark rm(THREAD); 1273 char buf[200]; 1274 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s", 1275 Method::name_and_sig_as_C_string(resolved_klass(), 1276 resolved_method->name(), 1277 resolved_method->signature())); 1278 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1279 } 1280 1281 // check if receiver klass implements the resolved interface 1282 if (!recv_klass->is_subtype_of(resolved_klass())) { 1283 ResourceMark rm(THREAD); 1284 char buf[200]; 1285 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 1286 recv_klass()->external_name(), 1287 resolved_klass()->external_name()); 1288 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1289 } 1290 1291 // do lookup based on receiver klass 1292 methodHandle sel_method; 1293 // This search must match the linktime preparation search for itable initialization 1294 // to correctly enforce loader constraints for interface method inheritance 1295 lookup_instance_method_in_klasses(sel_method, recv_klass, 1296 resolved_method->name(), 1297 resolved_method->signature(), CHECK); 1298 if (sel_method.is_null() && !check_null_and_abstract) { 1299 // In theory this is a harmless placeholder value, but 1300 // in practice leaving in null affects the nsk default method tests. 1301 // This needs further study. 1302 sel_method = resolved_method; 1303 } 1304 // check if method exists 1305 if (sel_method.is_null()) { 1306 ResourceMark rm(THREAD); 1307 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1308 Method::name_and_sig_as_C_string(recv_klass(), 1309 resolved_method->name(), 1310 resolved_method->signature())); 1311 } 1312 // check access 1313 // Throw Illegal Access Error if sel_method is not public. 1314 if (!sel_method->is_public()) { 1315 ResourceMark rm(THREAD); 1316 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 1317 Method::name_and_sig_as_C_string(recv_klass(), 1318 sel_method->name(), 1319 sel_method->signature())); 1320 } 1321 // check if abstract 1322 if (check_null_and_abstract && sel_method->is_abstract()) { 1323 ResourceMark rm(THREAD); 1324 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1325 Method::name_and_sig_as_C_string(recv_klass(), 1326 sel_method->name(), 1327 sel_method->signature())); 1328 } 1329 1330 if (TraceItables && Verbose) { 1331 ResourceMark rm(THREAD); 1332 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1333 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1334 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1335 Method::name_and_sig_as_C_string(resolved_klass(), 1336 resolved_method->name(), 1337 resolved_method->signature()), 1338 sel_method->method_holder()->internal_name() 1339 ); 1340 sel_method->access_flags().print_on(tty); 1341 if (sel_method->is_default_method()) { 1342 tty->print("default "); 1343 } 1344 if (sel_method->is_overpass()) { 1345 tty->print("overpass"); 1346 } 1347 tty->cr(); 1348 } 1349 // setup result 1350 if (!resolved_method->has_itable_index()) { 1351 int vtable_index = resolved_method->vtable_index(); 1352 assert(vtable_index == sel_method->vtable_index(), "sanity check"); 1353 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK); 1354 } else { 1355 int itable_index = resolved_method()->itable_index(); 1356 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK); 1357 } 1358} 1359 1360 1361methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1362 KlassHandle resolved_klass, 1363 Symbol* method_name, 1364 Symbol* method_signature, 1365 KlassHandle current_klass, 1366 bool check_access) { 1367 EXCEPTION_MARK; 1368 methodHandle method_result; 1369 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1370 if (HAS_PENDING_EXCEPTION) { 1371 CLEAR_PENDING_EXCEPTION; 1372 return methodHandle(); 1373 } else { 1374 return method_result; 1375 } 1376} 1377 1378methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1379 KlassHandle resolved_klass, 1380 Symbol* method_name, 1381 Symbol* method_signature, 1382 KlassHandle current_klass, 1383 bool check_access) { 1384 EXCEPTION_MARK; 1385 methodHandle method_result; 1386 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1387 if (HAS_PENDING_EXCEPTION) { 1388 CLEAR_PENDING_EXCEPTION; 1389 return methodHandle(); 1390 } else { 1391 return method_result; 1392 } 1393} 1394 1395methodHandle LinkResolver::resolve_virtual_call_or_null( 1396 KlassHandle receiver_klass, 1397 KlassHandle resolved_klass, 1398 Symbol* name, 1399 Symbol* signature, 1400 KlassHandle current_klass) { 1401 EXCEPTION_MARK; 1402 CallInfo info; 1403 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1404 if (HAS_PENDING_EXCEPTION) { 1405 CLEAR_PENDING_EXCEPTION; 1406 return methodHandle(); 1407 } 1408 return info.selected_method(); 1409} 1410 1411methodHandle LinkResolver::resolve_interface_call_or_null( 1412 KlassHandle receiver_klass, 1413 KlassHandle resolved_klass, 1414 Symbol* name, 1415 Symbol* signature, 1416 KlassHandle current_klass) { 1417 EXCEPTION_MARK; 1418 CallInfo info; 1419 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1420 if (HAS_PENDING_EXCEPTION) { 1421 CLEAR_PENDING_EXCEPTION; 1422 return methodHandle(); 1423 } 1424 return info.selected_method(); 1425} 1426 1427int LinkResolver::resolve_virtual_vtable_index( 1428 KlassHandle receiver_klass, 1429 KlassHandle resolved_klass, 1430 Symbol* name, 1431 Symbol* signature, 1432 KlassHandle current_klass) { 1433 EXCEPTION_MARK; 1434 CallInfo info; 1435 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1436 if (HAS_PENDING_EXCEPTION) { 1437 CLEAR_PENDING_EXCEPTION; 1438 return Method::invalid_vtable_index; 1439 } 1440 return info.vtable_index(); 1441} 1442 1443methodHandle LinkResolver::resolve_static_call_or_null( 1444 KlassHandle resolved_klass, 1445 Symbol* name, 1446 Symbol* signature, 1447 KlassHandle current_klass) { 1448 EXCEPTION_MARK; 1449 CallInfo info; 1450 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); 1451 if (HAS_PENDING_EXCEPTION) { 1452 CLEAR_PENDING_EXCEPTION; 1453 return methodHandle(); 1454 } 1455 return info.selected_method(); 1456} 1457 1458methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, 1459 KlassHandle current_klass) { 1460 EXCEPTION_MARK; 1461 CallInfo info; 1462 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); 1463 if (HAS_PENDING_EXCEPTION) { 1464 CLEAR_PENDING_EXCEPTION; 1465 return methodHandle(); 1466 } 1467 return info.selected_method(); 1468} 1469 1470 1471 1472//------------------------------------------------------------------------------------------------------------------------ 1473// ConstantPool entries 1474 1475void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1476 switch (byte) { 1477 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1478 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1479 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1480 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1481 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1482 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1483 } 1484 return; 1485} 1486 1487void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1488 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1489 // resolve klass 1490 resolve_klass(resolved_klass, pool, index, CHECK); 1491 1492 // Get name, signature, and static klass 1493 method_name = pool->name_ref_at(index); 1494 method_signature = pool->signature_ref_at(index); 1495 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1496} 1497 1498 1499void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1500 KlassHandle resolved_klass; 1501 Symbol* method_name = NULL; 1502 Symbol* method_signature = NULL; 1503 KlassHandle current_klass; 1504 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1505 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1506} 1507 1508 1509void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1510 KlassHandle resolved_klass; 1511 Symbol* method_name = NULL; 1512 Symbol* method_signature = NULL; 1513 KlassHandle current_klass; 1514 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1515 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1516} 1517 1518 1519void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1520 constantPoolHandle pool, int index, 1521 TRAPS) { 1522 1523 KlassHandle resolved_klass; 1524 Symbol* method_name = NULL; 1525 Symbol* method_signature = NULL; 1526 KlassHandle current_klass; 1527 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1528 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1529 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1530} 1531 1532 1533void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1534 KlassHandle resolved_klass; 1535 Symbol* method_name = NULL; 1536 Symbol* method_signature = NULL; 1537 KlassHandle current_klass; 1538 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1539 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1540 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1541} 1542 1543 1544void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1545 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1546 KlassHandle resolved_klass; 1547 Symbol* method_name = NULL; 1548 Symbol* method_signature = NULL; 1549 KlassHandle current_klass; 1550 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1551 if (TraceMethodHandles) { 1552 ResourceMark rm(THREAD); 1553 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); 1554 } 1555 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); 1556} 1557 1558void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, 1559 Symbol* method_name, Symbol* method_signature, 1560 KlassHandle current_klass, 1561 TRAPS) { 1562 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1563 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); 1564 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); 1565 methodHandle resolved_method; 1566 Handle resolved_appendix; 1567 Handle resolved_method_type; 1568 lookup_polymorphic_method(resolved_method, resolved_klass, 1569 method_name, method_signature, 1570 current_klass, &resolved_appendix, &resolved_method_type, CHECK); 1571 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1572} 1573 1574 1575void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1576 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); 1577 Symbol* method_name = pool->name_ref_at(index); 1578 Symbol* method_signature = pool->signature_ref_at(index); 1579 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); 1580 1581 // Resolve the bootstrap specifier (BSM + optional arguments). 1582 Handle bootstrap_specifier; 1583 // Check if CallSite has been bound already: 1584 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); 1585 if (cpce->is_f1_null()) { 1586 int pool_index = cpce->constant_pool_index(); 1587 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); 1588 assert(bsm_info != NULL, ""); 1589 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1590 bootstrap_specifier = Handle(THREAD, bsm_info); 1591 } 1592 if (!cpce->is_f1_null()) { 1593 methodHandle method( THREAD, cpce->f1_as_method()); 1594 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1595 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1596 result.set_handle(method, appendix, method_type, CHECK); 1597 return; 1598 } 1599 1600 if (TraceMethodHandles) { 1601 ResourceMark rm(THREAD); 1602 tty->print_cr("resolve_invokedynamic #%d %s %s", 1603 ConstantPool::decode_invokedynamic_index(index), 1604 method_name->as_C_string(), method_signature->as_C_string()); 1605 tty->print(" BSM info: "); bootstrap_specifier->print(); 1606 } 1607 1608 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); 1609} 1610 1611void LinkResolver::resolve_dynamic_call(CallInfo& result, 1612 Handle bootstrap_specifier, 1613 Symbol* method_name, Symbol* method_signature, 1614 KlassHandle current_klass, 1615 TRAPS) { 1616 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1617 // The appendix argument is likely to be a freshly-created CallSite. 1618 Handle resolved_appendix; 1619 Handle resolved_method_type; 1620 methodHandle resolved_method = 1621 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1622 bootstrap_specifier, 1623 method_name, method_signature, 1624 &resolved_appendix, 1625 &resolved_method_type, 1626 THREAD); 1627 if (HAS_PENDING_EXCEPTION) { 1628 if (TraceMethodHandles) { 1629 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION)); 1630 PENDING_EXCEPTION->print(); 1631 } 1632 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1633 // throw these guys, since they are already wrapped 1634 return; 1635 } 1636 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1637 // intercept only LinkageErrors which might have failed to wrap 1638 return; 1639 } 1640 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1641 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1642 CLEAR_PENDING_EXCEPTION; 1643 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1644 } 1645 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1646} 1647 1648//------------------------------------------------------------------------------------------------------------------------ 1649#ifndef PRODUCT 1650 1651void CallInfo::print() { 1652 ResourceMark rm; 1653 const char* kindstr = "unknown"; 1654 switch (_call_kind) { 1655 case direct_call: kindstr = "direct"; break; 1656 case vtable_call: kindstr = "vtable"; break; 1657 case itable_call: kindstr = "itable"; break; 1658 } 1659 tty->print_cr("Call %s@%d %s", kindstr, _call_index, 1660 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string()); 1661} 1662 1663#endif 1664