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