1 /* 2 * Copyright (c) 1997, 2015, 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/shared/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 "oops/oop.inline.hpp" 39 #include "prims/methodHandles.hpp" 40 #include "prims/nativeLookup.hpp" 41 #include "runtime/compilationPolicy.hpp" 42 #include "runtime/fieldDescriptor.hpp" 43 #include "runtime/frame.inline.hpp" 44 #include "runtime/handles.inline.hpp" 45 #include "runtime/reflection.hpp" 46 #include "runtime/signature.hpp" 47 #include "runtime/thread.inline.hpp" 48 #include "runtime/vmThread.hpp" 49 50 51 //------------------------------------------------------------------------------------------------------------------------ 52 // Implementation of CallInfo 53 54 55 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { 56 int vtable_index = Method::nonvirtual_vtable_index; 57 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 58 } 59 60 61 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) { 62 // This is only called for interface methods. If the resolved_method 63 // comes from java/lang/Object, it can be the subject of a virtual call, so 64 // we should pick the vtable index from the resolved method. 65 // In that case, the caller must call set_virtual instead of set_interface. 66 assert(resolved_method->method_holder()->is_interface(), ""); 67 assert(itable_index == resolved_method()->itable_index(), ""); 68 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK); 69 } 70 71 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { 72 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index"); 73 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), ""); 74 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call); 75 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK); 76 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); 77 } 78 79 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) { 80 if (resolved_method.is_null()) { 81 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); 82 } 83 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass(); 84 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || 85 resolved_method->is_compiled_lambda_form(), 86 "linkMethod must return one of these"); 87 int vtable_index = Method::nonvirtual_vtable_index; 88 assert(!resolved_method->has_vtable_index(), ""); 89 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK); 90 _resolved_appendix = resolved_appendix; 91 _resolved_method_type = resolved_method_type; 92 } 93 94 void CallInfo::set_common(KlassHandle resolved_klass, 95 KlassHandle selected_klass, 96 methodHandle resolved_method, 97 methodHandle selected_method, 98 CallKind kind, 99 int index, 100 TRAPS) { 101 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); 102 _resolved_klass = resolved_klass; 103 _selected_klass = selected_klass; 104 _resolved_method = resolved_method; 105 _selected_method = selected_method; 106 _call_kind = kind; 107 _call_index = index; 108 _resolved_appendix = Handle(); 109 DEBUG_ONLY(verify()); // verify before making side effects 110 111 if (CompilationPolicy::must_be_compiled(selected_method)) { 112 // This path is unusual, mostly used by the '-Xcomp' stress test mode. 113 114 // Note: with several active threads, the must_be_compiled may be true 115 // while can_be_compiled is false; remove assert 116 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); 117 if (THREAD->is_Compiler_thread()) { 118 // don't force compilation, resolve was on behalf of compiler 119 return; 120 } 121 if (selected_method->method_holder()->is_not_initialized()) { 122 // 'is_not_initialized' means not only '!is_initialized', but also that 123 // initialization has not been started yet ('!being_initialized') 124 // Do not force compilation of methods in uninitialized classes. 125 // Note that doing this would throw an assert later, 126 // in CompileBroker::compile_method. 127 // We sometimes use the link resolver to do reflective lookups 128 // even before classes are initialized. 129 return; 130 } 131 CompileBroker::compile_method(selected_method, InvocationEntryBci, 132 CompilationPolicy::policy()->initial_compile_level(), 133 methodHandle(), 0, "must_be_compiled", CHECK); 134 } 135 } 136 137 // utility query for unreflecting a method 138 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) { 139 Klass* resolved_method_holder = resolved_method->method_holder(); 140 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st 141 resolved_klass = resolved_method_holder; 142 } 143 _resolved_klass = resolved_klass; 144 _selected_klass = resolved_klass; 145 _resolved_method = resolved_method; 146 _selected_method = resolved_method; 147 // classify: 148 CallKind kind = CallInfo::unknown_kind; 149 int index = resolved_method->vtable_index(); 150 if (resolved_method->can_be_statically_bound()) { 151 kind = CallInfo::direct_call; 152 } else if (!resolved_method_holder->is_interface()) { 153 // Could be an Object method inherited into an interface, but still a vtable call. 154 kind = CallInfo::vtable_call; 155 } else if (!resolved_klass->is_interface()) { 156 // A default or miranda method. Compute the vtable index. 157 ResourceMark rm; 158 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable(); 159 index = LinkResolver::vtable_index_of_interface_method(resolved_klass, 160 resolved_method); 161 assert(index >= 0 , "we should have valid vtable index at this point"); 162 163 kind = CallInfo::vtable_call; 164 } else if (resolved_method->has_vtable_index()) { 165 // Can occur if an interface redeclares a method of Object. 166 167 #ifdef ASSERT 168 // Ensure that this is really the case. 169 KlassHandle object_klass = SystemDictionary::Object_klass(); 170 Method * object_resolved_method = object_klass()->vtable()->method_at(index); 171 assert(object_resolved_method->name() == resolved_method->name(), 172 err_msg("Object and interface method names should match at vtable index %d, %s != %s", 173 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string())); 174 assert(object_resolved_method->signature() == resolved_method->signature(), 175 err_msg("Object and interface method signatures should match at vtable index %d, %s != %s", 176 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string())); 177 #endif // ASSERT 178 179 kind = CallInfo::vtable_call; 180 } else { 181 // A regular interface call. 182 kind = CallInfo::itable_call; 183 index = resolved_method->itable_index(); 184 } 185 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index)); 186 _call_kind = kind; 187 _call_index = index; 188 _resolved_appendix = Handle(); 189 DEBUG_ONLY(verify()); 190 } 191 192 #ifdef ASSERT 193 void CallInfo::verify() { 194 switch (call_kind()) { // the meaning and allowed value of index depends on kind 195 case CallInfo::direct_call: 196 if (_call_index == Method::nonvirtual_vtable_index) break; 197 // else fall through to check vtable index: 198 case CallInfo::vtable_call: 199 assert(resolved_klass()->verify_vtable_index(_call_index), ""); 200 break; 201 case CallInfo::itable_call: 202 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), ""); 203 break; 204 case CallInfo::unknown_kind: 205 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set"); 206 break; 207 default: 208 fatal(err_msg_res("Unexpected call kind %d", call_kind())); 209 } 210 } 211 #endif //ASSERT 212 213 214 215 //------------------------------------------------------------------------------------------------------------------------ 216 // Klass resolution 217 218 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { 219 if (!Reflection::verify_class_access(ref_klass(), 220 sel_klass(), 221 true)) { 222 ResourceMark rm(THREAD); 223 Exceptions::fthrow( 224 THREAD_AND_LOCATION, 225 vmSymbols::java_lang_IllegalAccessError(), 226 "tried to access class %s from class %s", 227 sel_klass->external_name(), 228 ref_klass->external_name() 229 ); 230 return; 231 } 232 } 233 234 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 235 Klass* result_oop = pool->klass_ref_at(index, CHECK); 236 result = KlassHandle(THREAD, result_oop); 237 } 238 239 //------------------------------------------------------------------------------------------------------------------------ 240 // Method resolution 241 // 242 // According to JVM spec. $5.4.3c & $5.4.3d 243 244 // Look up method in klasses, including static methods 245 // Then look up local default methods 246 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) { 247 // Ignore overpasses so statics can be found during resolution 248 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::skip_overpass); 249 250 if (klass->oop_is_array()) { 251 // Only consider klass and super klass for arrays 252 result = methodHandle(THREAD, result_oop); 253 return; 254 } 255 256 // JDK 8, JVMS 5.4.3.4: Interface method resolution should 257 // ignore static and non-public methods of java.lang.Object, 258 // like clone, finalize, registerNatives. 259 if (in_imethod_resolve && 260 result_oop != NULL && 261 klass->is_interface() && 262 (result_oop->is_static() || !result_oop->is_public()) && 263 result_oop->method_holder() == SystemDictionary::Object_klass()) { 264 result_oop = NULL; 265 } 266 267 // Before considering default methods, check for an overpass in the 268 // current class if a method has not been found. 269 if (result_oop == NULL) { 270 result_oop = InstanceKlass::cast(klass())->find_method(name, signature); 271 } 272 273 if (result_oop == NULL) { 274 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 275 if (default_methods != NULL) { 276 result_oop = InstanceKlass::find_method(default_methods, name, signature); 277 } 278 } 279 280 if (checkpolymorphism && result_oop != NULL) { 281 vmIntrinsics::ID iid = result_oop->intrinsic_id(); 282 if (MethodHandles::is_signature_polymorphic(iid)) { 283 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. 284 return; 285 } 286 } 287 result = methodHandle(THREAD, result_oop); 288 } 289 290 // returns first instance method 291 // Looks up method in classes, then looks up local default methods 292 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 293 Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::find_overpass); 294 result = methodHandle(THREAD, result_oop); 295 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) { 296 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super()); 297 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::find_overpass)); 298 } 299 300 if (klass->oop_is_array()) { 301 // Only consider klass and super klass for arrays 302 return; 303 } 304 305 if (result.is_null()) { 306 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 307 if (default_methods != NULL) { 308 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature)); 309 assert(result.is_null() || !result->is_static(), "static defaults not allowed"); 310 } 311 } 312 } 313 314 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass, 315 methodHandle resolved_method) { 316 317 int vtable_index = Method::invalid_vtable_index; 318 Symbol* name = resolved_method->name(); 319 Symbol* signature = resolved_method->signature(); 320 321 // First check in default method array 322 if (!resolved_method->is_abstract() && 323 (InstanceKlass::cast(klass())->default_methods() != NULL)) { 324 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), 325 name, signature, Klass::find_overpass, Klass::find_static); 326 if (index >= 0 ) { 327 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index); 328 } 329 } 330 if (vtable_index == Method::invalid_vtable_index) { 331 // get vtable_index for miranda methods 332 ResourceMark rm; 333 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); 334 vtable_index = vt->index_of_miranda(name, signature); 335 } 336 return vtable_index; 337 } 338 339 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 340 InstanceKlass *ik = InstanceKlass::cast(klass()); 341 342 // Specify 'true' in order to skip default methods when searching the 343 // interfaces. Function lookup_method_in_klasses() already looked for 344 // the method in the default methods table. 345 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, Klass::skip_defaults)); 346 } 347 348 void LinkResolver::lookup_polymorphic_method(methodHandle& result, 349 KlassHandle klass, Symbol* name, Symbol* full_signature, 350 KlassHandle current_klass, 351 Handle *appendix_result_or_null, 352 Handle *method_type_result, 353 TRAPS) { 354 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); 355 if (TraceMethodHandles) { 356 ResourceMark rm(THREAD); 357 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", 358 vmIntrinsics::name_at(iid), klass->external_name(), 359 name->as_C_string(), full_signature->as_C_string()); 360 } 361 if (klass() == SystemDictionary::MethodHandle_klass() && 362 iid != vmIntrinsics::_none) { 363 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { 364 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. 365 // Do not erase last argument type (MemberName) if it is a static linkTo method. 366 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); 367 TempNewSymbol basic_signature = 368 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); 369 if (TraceMethodHandles) { 370 ResourceMark rm(THREAD); 371 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", 372 name->as_C_string(), 373 full_signature->as_C_string(), 374 basic_signature->as_C_string()); 375 } 376 result = SystemDictionary::find_method_handle_intrinsic(iid, 377 basic_signature, 378 CHECK); 379 if (result.not_null()) { 380 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); 381 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); 382 assert(basic_signature == result->signature(), "predict the result signature"); 383 if (TraceMethodHandles) { 384 tty->print("lookup_polymorphic_method => intrinsic "); 385 result->print_on(tty); 386 } 387 return; 388 } 389 } else if (iid == vmIntrinsics::_invokeGeneric 390 && !THREAD->is_Compiler_thread() 391 && appendix_result_or_null != NULL) { 392 // This is a method with type-checking semantics. 393 // We will ask Java code to spin an adapter method for it. 394 if (!MethodHandles::enabled()) { 395 // Make sure the Java part of the runtime has been booted up. 396 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); 397 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { 398 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 399 Handle(), 400 Handle(), 401 true, 402 CHECK); 403 } 404 } 405 406 Handle appendix; 407 Handle method_type; 408 result = SystemDictionary::find_method_handle_invoker(name, 409 full_signature, 410 current_klass, 411 &appendix, 412 &method_type, 413 CHECK); 414 if (TraceMethodHandles) { 415 tty->print("lookup_polymorphic_method => (via Java) "); 416 result->print_on(tty); 417 tty->print(" lookup_polymorphic_method => appendix = "); 418 if (appendix.is_null()) tty->print_cr("(none)"); 419 else appendix->print_on(tty); 420 } 421 if (result.not_null()) { 422 #ifdef ASSERT 423 ResourceMark rm(THREAD); 424 425 TempNewSymbol basic_signature = 426 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); 427 int actual_size_of_params = result->size_of_parameters(); 428 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); 429 // +1 for MethodHandle.this, +1 for trailing MethodType 430 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; 431 if (appendix.not_null()) expected_size_of_params += 1; 432 if (actual_size_of_params != expected_size_of_params) { 433 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); 434 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); 435 result->print(); 436 } 437 assert(actual_size_of_params == expected_size_of_params, 438 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); 439 #endif //ASSERT 440 441 assert(appendix_result_or_null != NULL, ""); 442 (*appendix_result_or_null) = appendix; 443 (*method_type_result) = method_type; 444 return; 445 } 446 } 447 } 448 } 449 450 void LinkResolver::check_method_accessability(KlassHandle ref_klass, 451 KlassHandle resolved_klass, 452 KlassHandle sel_klass, 453 methodHandle sel_method, 454 TRAPS) { 455 456 AccessFlags flags = sel_method->access_flags(); 457 458 // Special case: arrays always override "clone". JVMS 2.15. 459 // If the resolved klass is an array class, and the declaring class 460 // is java.lang.Object and the method is "clone", set the flags 461 // to public. 462 // 463 // We'll check for the method name first, as that's most likely 464 // to be false (so we'll short-circuit out of these tests). 465 if (sel_method->name() == vmSymbols::clone_name() && 466 sel_klass() == SystemDictionary::Object_klass() && 467 resolved_klass->oop_is_array()) { 468 // We need to change "protected" to "public". 469 assert(flags.is_protected(), "clone not protected?"); 470 jint new_flags = flags.as_int(); 471 new_flags = new_flags & (~JVM_ACC_PROTECTED); 472 new_flags = new_flags | JVM_ACC_PUBLIC; 473 flags.set_flags(new_flags); 474 } 475 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); 476 477 if (!Reflection::verify_field_access(ref_klass(), 478 resolved_klass(), 479 sel_klass(), 480 flags, 481 true)) { 482 ResourceMark rm(THREAD); 483 Exceptions::fthrow( 484 THREAD_AND_LOCATION, 485 vmSymbols::java_lang_IllegalAccessError(), 486 "tried to access method %s.%s%s from class %s", 487 sel_klass->external_name(), 488 sel_method->name()->as_C_string(), 489 sel_method->signature()->as_C_string(), 490 ref_klass->external_name() 491 ); 492 return; 493 } 494 } 495 496 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, 497 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { 498 // This method is used only 499 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call), 500 // and 501 // (2) in Bytecode_invoke::static_target 502 // It appears to fail when applied to an invokeinterface call site. 503 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points. 504 // resolve klass 505 if (code == Bytecodes::_invokedynamic) { 506 resolved_klass = SystemDictionary::MethodHandle_klass(); 507 Symbol* method_name = vmSymbols::invoke_name(); 508 Symbol* method_signature = pool->signature_ref_at(index); 509 KlassHandle current_klass(THREAD, pool->pool_holder()); 510 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 511 return; 512 } 513 514 resolve_klass(resolved_klass, pool, index, CHECK); 515 516 Symbol* method_name = pool->name_ref_at(index); 517 Symbol* method_signature = pool->signature_ref_at(index); 518 KlassHandle current_klass(THREAD, pool->pool_holder()); 519 520 if (pool->has_preresolution() 521 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && 522 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { 523 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); 524 if (result_oop != NULL) { 525 resolved_method = methodHandle(THREAD, result_oop); 526 return; 527 } 528 } 529 530 if (code == Bytecodes::_invokeinterface) { 531 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 532 } else if (code == Bytecodes::_invokevirtual) { 533 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 534 } else if (!resolved_klass->is_interface()) { 535 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 536 } else { 537 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true; 538 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK); 539 } 540 } 541 542 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, 543 Symbol* method_name, Symbol* method_signature, 544 KlassHandle current_klass, bool check_access, 545 bool require_methodref, TRAPS) { 546 547 Handle nested_exception; 548 549 // 1. check if methodref required, that resolved_klass is not interfacemethodref 550 if (require_methodref && resolved_klass->is_interface()) { 551 ResourceMark rm(THREAD); 552 char buf[200]; 553 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", 554 resolved_klass()->external_name()); 555 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 556 } 557 558 // 2. lookup method in resolved klass and its super klasses 559 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK); 560 561 if (resolved_method.is_null() && !resolved_klass->oop_is_array()) { // not found in the class hierarchy 562 // 3. lookup method in all the interfaces implemented by the resolved klass 563 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 564 565 if (resolved_method.is_null()) { 566 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc 567 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, 568 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); 569 if (HAS_PENDING_EXCEPTION) { 570 nested_exception = Handle(THREAD, PENDING_EXCEPTION); 571 CLEAR_PENDING_EXCEPTION; 572 } 573 } 574 } 575 576 if (resolved_method.is_null()) { 577 // 4. method lookup failed 578 ResourceMark rm(THREAD); 579 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), 580 Method::name_and_sig_as_C_string(resolved_klass(), 581 method_name, 582 method_signature), 583 nested_exception); 584 } 585 586 // 5. access checks, access checking may be turned off when calling from within the VM. 587 if (check_access) { 588 assert(current_klass.not_null() , "current_klass should not be null"); 589 590 // check if method can be accessed by the referring class 591 check_method_accessability(current_klass, 592 resolved_klass, 593 KlassHandle(THREAD, resolved_method->method_holder()), 594 resolved_method, 595 CHECK); 596 597 // check loader constraints 598 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 599 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 600 { 601 ResourceMark rm(THREAD); 602 Symbol* failed_type_symbol = 603 SystemDictionary::check_signature_loaders(method_signature, loader, 604 class_loader, true, CHECK); 605 if (failed_type_symbol != NULL) { 606 const char* msg = "loader constraint violation: when resolving method" 607 " \"%s\" the class loader (instance of %s) of the current class, %s," 608 " and the class loader (instance of %s) for the method's defining class, %s, have" 609 " different Class objects for the type %s used in the signature"; 610 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 611 const char* loader1 = SystemDictionary::loader_name(loader()); 612 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 613 const char* loader2 = SystemDictionary::loader_name(class_loader()); 614 char* target = InstanceKlass::cast(resolved_method->method_holder()) 615 ->name()->as_C_string(); 616 char* failed_type_name = failed_type_symbol->as_C_string(); 617 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 618 strlen(current) + strlen(loader2) + strlen(target) + 619 strlen(failed_type_name) + 1; 620 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 621 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 622 target, failed_type_name); 623 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 624 } 625 } 626 } 627 } 628 629 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 630 KlassHandle resolved_klass, 631 Symbol* method_name, 632 Symbol* method_signature, 633 KlassHandle current_klass, 634 bool check_access, 635 bool nostatics, TRAPS) { 636 637 // check if klass is interface 638 if (!resolved_klass->is_interface()) { 639 ResourceMark rm(THREAD); 640 char buf[200]; 641 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); 642 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 643 } 644 645 // lookup method in this interface or its super, java.lang.Object 646 // JDK8: also look for static methods 647 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK); 648 649 if (resolved_method.is_null() && !resolved_klass->oop_is_array()) { 650 // lookup method in all the super-interfaces 651 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 652 } 653 654 if (resolved_method.is_null()) { 655 // no method found 656 ResourceMark rm(THREAD); 657 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 658 Method::name_and_sig_as_C_string(resolved_klass(), 659 method_name, 660 method_signature)); 661 } 662 663 if (check_access) { 664 // JDK8 adds non-public interface methods, and accessability check requirement 665 assert(current_klass.not_null() , "current_klass should not be null"); 666 667 // check if method can be accessed by the referring class 668 check_method_accessability(current_klass, 669 resolved_klass, 670 KlassHandle(THREAD, resolved_method->method_holder()), 671 resolved_method, 672 CHECK); 673 674 HandleMark hm(THREAD); 675 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 676 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 677 { 678 ResourceMark rm(THREAD); 679 Symbol* failed_type_symbol = 680 SystemDictionary::check_signature_loaders(method_signature, loader, 681 class_loader, true, CHECK); 682 if (failed_type_symbol != NULL) { 683 const char* msg = "loader constraint violation: when resolving " 684 "interface method \"%s\" the class loader (instance of %s) of the " 685 "current class, %s, and the class loader (instance of %s) for " 686 "the method's defining class, %s, have different Class objects for the type %s " 687 "used in the signature"; 688 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 689 const char* loader1 = SystemDictionary::loader_name(loader()); 690 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 691 const char* loader2 = SystemDictionary::loader_name(class_loader()); 692 char* target = InstanceKlass::cast(resolved_method->method_holder()) 693 ->name()->as_C_string(); 694 char* failed_type_name = failed_type_symbol->as_C_string(); 695 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 696 strlen(current) + strlen(loader2) + strlen(target) + 697 strlen(failed_type_name) + 1; 698 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 699 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 700 target, failed_type_name); 701 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 702 } 703 } 704 } 705 706 if (nostatics && resolved_method->is_static()) { 707 ResourceMark rm(THREAD); 708 char buf[200]; 709 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", 710 Method::name_and_sig_as_C_string(resolved_klass(), 711 resolved_method->name(), resolved_method->signature())); 712 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 713 } 714 715 if (TraceItables && Verbose) { 716 ResourceMark rm(THREAD); 717 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 718 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 719 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 720 Method::name_and_sig_as_C_string(resolved_klass(), 721 resolved_method->name(), 722 resolved_method->signature()), 723 resolved_method->method_holder()->internal_name() 724 ); 725 resolved_method->access_flags().print_on(tty); 726 if (resolved_method->is_default_method()) { 727 tty->print("default "); 728 } 729 if (resolved_method->is_overpass()) { 730 tty->print("overpass"); 731 } 732 tty->cr(); 733 } 734 } 735 736 //------------------------------------------------------------------------------------------------------------------------ 737 // Field resolution 738 739 void LinkResolver::check_field_accessability(KlassHandle ref_klass, 740 KlassHandle resolved_klass, 741 KlassHandle sel_klass, 742 fieldDescriptor& fd, 743 TRAPS) { 744 if (!Reflection::verify_field_access(ref_klass(), 745 resolved_klass(), 746 sel_klass(), 747 fd.access_flags(), 748 true)) { 749 ResourceMark rm(THREAD); 750 Exceptions::fthrow( 751 THREAD_AND_LOCATION, 752 vmSymbols::java_lang_IllegalAccessError(), 753 "tried to access field %s.%s from class %s", 754 sel_klass->external_name(), 755 fd.name()->as_C_string(), 756 ref_klass->external_name() 757 ); 758 return; 759 } 760 } 761 762 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 763 // Load these early in case the resolve of the containing klass fails 764 Symbol* field = pool->name_ref_at(index); 765 Symbol* sig = pool->signature_ref_at(index); 766 767 // resolve specified klass 768 KlassHandle resolved_klass; 769 resolve_klass(resolved_klass, pool, index, CHECK); 770 771 KlassHandle current_klass(THREAD, pool->pool_holder()); 772 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK); 773 } 774 775 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig, 776 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class, 777 TRAPS) { 778 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 779 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield || 780 byte == Bytecodes::_nofast_getfield || byte == Bytecodes::_nofast_putfield || 781 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode"); 782 783 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 784 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield); 785 // Check if there's a resolved klass containing the field 786 if (resolved_klass.is_null()) { 787 ResourceMark rm(THREAD); 788 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 789 } 790 791 // Resolve instance field 792 KlassHandle sel_klass(THREAD, resolved_klass->find_field(field, sig, &fd)); 793 // check if field exists; i.e., if a klass containing the field def has been selected 794 if (sel_klass.is_null()) { 795 ResourceMark rm(THREAD); 796 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 797 } 798 799 if (!check_access) 800 // Access checking may be turned off when calling from within the VM. 801 return; 802 803 // check access 804 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK); 805 806 // check for errors 807 if (is_static != fd.is_static()) { 808 ResourceMark rm(THREAD); 809 char msg[200]; 810 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string()); 811 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 812 } 813 814 // Final fields can only be accessed from its own class. 815 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) { 816 THROW(vmSymbols::java_lang_IllegalAccessError()); 817 } 818 819 // initialize resolved_klass if necessary 820 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 821 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 822 // 823 // note 2: we don't want to force initialization if we are just checking 824 // if the field access is legal; e.g., during compilation 825 if (is_static && initialize_class) { 826 sel_klass->initialize(CHECK); 827 } 828 829 if (sel_klass() != current_klass()) { 830 HandleMark hm(THREAD); 831 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 832 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); 833 { 834 ResourceMark rm(THREAD); 835 Symbol* failed_type_symbol = 836 SystemDictionary::check_signature_loaders(sig, 837 ref_loader, sel_loader, 838 false, 839 CHECK); 840 if (failed_type_symbol != NULL) { 841 const char* msg = "loader constraint violation: when resolving field" 842 " \"%s\" the class loader (instance of %s) of the referring class, " 843 "%s, and the class loader (instance of %s) for the field's resolved " 844 "type, %s, have different Class objects for that type"; 845 char* field_name = field->as_C_string(); 846 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 847 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); 848 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 849 char* failed_type_name = failed_type_symbol->as_C_string(); 850 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 851 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1; 852 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 853 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 854 failed_type_name); 855 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 856 } 857 } 858 } 859 860 // return information. note that the klass is set to the actual klass containing the 861 // field, otherwise access of static fields in superclasses will not work. 862 } 863 864 865 //------------------------------------------------------------------------------------------------------------------------ 866 // Invoke resolution 867 // 868 // Naming conventions: 869 // 870 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 871 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 872 // resolved_klass the specified klass (i.e., specified via constant pool index) 873 // recv_klass the receiver klass 874 875 876 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 877 Symbol* method_signature, KlassHandle current_klass, 878 bool check_access, bool initialize_class, TRAPS) { 879 methodHandle resolved_method; 880 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 881 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); 882 883 // Initialize klass (this should only happen if everything is ok) 884 if (initialize_class && resolved_klass->should_be_initialized()) { 885 resolved_klass->initialize(CHECK); 886 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 887 } 888 889 // setup result 890 result.set_static(resolved_klass, resolved_method, CHECK); 891 } 892 893 // throws linktime exceptions 894 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 895 Symbol* method_name, Symbol* method_signature, 896 KlassHandle current_klass, bool check_access, TRAPS) { 897 898 if (!resolved_klass->is_interface()) { 899 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 900 } else { 901 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 902 } 903 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 904 905 // check if static 906 if (!resolved_method->is_static()) { 907 ResourceMark rm(THREAD); 908 char buf[200]; 909 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 910 resolved_method->name(), 911 resolved_method->signature())); 912 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 913 } 914 } 915 916 917 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 918 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 919 methodHandle resolved_method; 920 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 921 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 922 } 923 924 // throws linktime exceptions 925 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 926 Symbol* method_name, Symbol* method_signature, 927 KlassHandle current_klass, bool check_access, TRAPS) { 928 929 // Invokespecial is called for multiple special reasons: 930 // <init> 931 // local private method invocation, for classes and interfaces 932 // superclass.method, which can also resolve to a default method 933 // and the selected method is recalculated relative to the direct superclass 934 // superinterface.method, which explicitly does not check shadowing 935 936 if (!resolved_klass->is_interface()) { 937 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 938 } else { 939 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 940 } 941 942 // check if method name is <init>, that it is found in same klass as static type 943 if (resolved_method->name() == vmSymbols::object_initializer_name() && 944 resolved_method->method_holder() != resolved_klass()) { 945 ResourceMark rm(THREAD); 946 Exceptions::fthrow( 947 THREAD_AND_LOCATION, 948 vmSymbols::java_lang_NoSuchMethodError(), 949 "%s: method %s%s not found", 950 resolved_klass->external_name(), 951 resolved_method->name()->as_C_string(), 952 resolved_method->signature()->as_C_string() 953 ); 954 return; 955 } 956 957 // check if invokespecial's interface method reference is in an indirect superinterface 958 if (!current_klass.is_null() && resolved_klass->is_interface()) { 959 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ? 960 current_klass() : 961 InstanceKlass::cast(current_klass())->host_klass(); 962 // Disable verification for the dynamically-generated reflection bytecodes. 963 bool is_reflect = klass_to_check->is_subclass_of( 964 SystemDictionary::reflect_MagicAccessorImpl_klass()); 965 966 if (!is_reflect && 967 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) { 968 ResourceMark rm(THREAD); 969 char buf[200]; 970 jio_snprintf(buf, sizeof(buf), 971 "Interface method reference: %s, is in an indirect superinterface of %s", 972 Method::name_and_sig_as_C_string(resolved_klass(), 973 resolved_method->name(), 974 resolved_method->signature()), 975 current_klass->external_name()); 976 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 977 } 978 } 979 980 // check if not static 981 if (resolved_method->is_static()) { 982 ResourceMark rm(THREAD); 983 char buf[200]; 984 jio_snprintf(buf, sizeof(buf), 985 "Expecting non-static method %s", 986 Method::name_and_sig_as_C_string(resolved_klass(), 987 resolved_method->name(), 988 resolved_method->signature())); 989 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 990 } 991 992 if (TraceItables && Verbose) { 993 ResourceMark rm(THREAD); 994 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 995 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 996 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 997 Method::name_and_sig_as_C_string(resolved_klass(), 998 resolved_method->name(), 999 resolved_method->signature()), 1000 resolved_method->method_holder()->internal_name() 1001 ); 1002 resolved_method->access_flags().print_on(tty); 1003 if (resolved_method->is_default_method()) { 1004 tty->print("default "); 1005 } 1006 if (resolved_method->is_overpass()) { 1007 tty->print("overpass"); 1008 } 1009 tty->cr(); 1010 } 1011 } 1012 1013 // throws runtime exceptions 1014 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1015 KlassHandle current_klass, bool check_access, TRAPS) { 1016 1017 // resolved method is selected method unless we have an old-style lookup 1018 // for a superclass method 1019 // Invokespecial for a superinterface, resolved method is selected method, 1020 // no checks for shadowing 1021 methodHandle sel_method(THREAD, resolved_method()); 1022 1023 // check if this is an old-style super call and do a new lookup if so 1024 { KlassHandle method_klass = KlassHandle(THREAD, 1025 resolved_method->method_holder()); 1026 1027 if (check_access && 1028 // a) check if ACC_SUPER flag is set for the current class 1029 (current_klass->is_super() || !AllowNonVirtualCalls) && 1030 // b) check if the class of the resolved_klass is a superclass 1031 // (not supertype in order to exclude interface classes) of the current class. 1032 // This check is not performed for super.invoke for interface methods 1033 // in super interfaces. 1034 current_klass->is_subclass_of(resolved_klass()) && 1035 current_klass() != resolved_klass() && 1036 // c) check if the method is not <init> 1037 resolved_method->name() != vmSymbols::object_initializer_name()) { 1038 // Lookup super method 1039 KlassHandle super_klass(THREAD, current_klass->super()); 1040 lookup_instance_method_in_klasses(sel_method, super_klass, 1041 resolved_method->name(), 1042 resolved_method->signature(), CHECK); 1043 // check if found 1044 if (sel_method.is_null()) { 1045 ResourceMark rm(THREAD); 1046 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1047 Method::name_and_sig_as_C_string(resolved_klass(), 1048 resolved_method->name(), 1049 resolved_method->signature())); 1050 } 1051 } 1052 } 1053 1054 // check if not static 1055 if (sel_method->is_static()) { 1056 ResourceMark rm(THREAD); 1057 char buf[200]; 1058 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1059 resolved_method->name(), 1060 resolved_method->signature())); 1061 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1062 } 1063 1064 // check if abstract 1065 if (sel_method->is_abstract()) { 1066 ResourceMark rm(THREAD); 1067 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1068 Method::name_and_sig_as_C_string(resolved_klass(), 1069 sel_method->name(), 1070 sel_method->signature())); 1071 } 1072 1073 if (TraceItables && Verbose) { 1074 ResourceMark rm(THREAD); 1075 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1076 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1077 Method::name_and_sig_as_C_string(resolved_klass(), 1078 sel_method->name(), 1079 sel_method->signature()), 1080 sel_method->method_holder()->internal_name() 1081 ); 1082 sel_method->access_flags().print_on(tty); 1083 if (sel_method->is_default_method()) { 1084 tty->print("default "); 1085 } 1086 if (sel_method->is_overpass()) { 1087 tty->print("overpass"); 1088 } 1089 tty->cr(); 1090 } 1091 1092 // setup result 1093 result.set_static(resolved_klass, sel_method, CHECK); 1094 } 1095 1096 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 1097 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1098 bool check_access, bool check_null_and_abstract, TRAPS) { 1099 methodHandle resolved_method; 1100 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1101 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 1102 } 1103 1104 // throws linktime exceptions 1105 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 1106 Symbol* method_name, Symbol* method_signature, 1107 KlassHandle current_klass, bool check_access, TRAPS) { 1108 // normal method resolution 1109 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1110 1111 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1112 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1113 1114 // check if private interface method 1115 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1116 ResourceMark rm(THREAD); 1117 char buf[200]; 1118 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s", 1119 Method::name_and_sig_as_C_string(resolved_klass(), 1120 resolved_method->name(), 1121 resolved_method->signature()), 1122 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name())); 1123 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1124 } 1125 1126 // check if not static 1127 if (resolved_method->is_static()) { 1128 ResourceMark rm(THREAD); 1129 char buf[200]; 1130 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1131 resolved_method->name(), 1132 resolved_method->signature())); 1133 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1134 } 1135 1136 if (PrintVtables && Verbose) { 1137 ResourceMark rm(THREAD); 1138 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 1139 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 1140 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1141 Method::name_and_sig_as_C_string(resolved_klass(), 1142 resolved_method->name(), 1143 resolved_method->signature()), 1144 resolved_method->method_holder()->internal_name() 1145 ); 1146 resolved_method->access_flags().print_on(tty); 1147 if (resolved_method->is_default_method()) { 1148 tty->print("default "); 1149 } 1150 if (resolved_method->is_overpass()) { 1151 tty->print("overpass"); 1152 } 1153 tty->cr(); 1154 } 1155 } 1156 1157 // throws runtime exceptions 1158 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 1159 methodHandle resolved_method, 1160 KlassHandle resolved_klass, 1161 Handle recv, 1162 KlassHandle recv_klass, 1163 bool check_null_and_abstract, 1164 TRAPS) { 1165 1166 // setup default return values 1167 int vtable_index = Method::invalid_vtable_index; 1168 methodHandle selected_method; 1169 1170 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 1171 1172 // runtime method resolution 1173 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 1174 THROW(vmSymbols::java_lang_NullPointerException()); 1175 } 1176 1177 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s 1178 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 1179 // a missing receiver might result in a bogus lookup. 1180 assert(resolved_method->method_holder()->is_linked(), "must be linked"); 1181 1182 // do lookup based on receiver klass using the vtable index 1183 if (resolved_method->method_holder()->is_interface()) { // miranda method 1184 vtable_index = vtable_index_of_interface_method(resolved_klass, 1185 resolved_method); 1186 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 1187 1188 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); 1189 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1190 } else { 1191 // at this point we are sure that resolved_method is virtual and not 1192 // a miranda method; therefore, it must have a valid vtable index. 1193 assert(!resolved_method->has_itable_index(), ""); 1194 vtable_index = resolved_method->vtable_index(); 1195 // We could get a negative vtable_index for final methods, 1196 // because as an optimization they are they are never put in the vtable, 1197 // unless they override an existing method. 1198 // If we do get a negative, it means the resolved method is the the selected 1199 // method, and it can never be changed by an override. 1200 if (vtable_index == Method::nonvirtual_vtable_index) { 1201 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 1202 selected_method = resolved_method; 1203 } else { 1204 // recv_klass might be an arrayKlassOop but all vtables start at 1205 // the same place. The cast is to avoid virtual call and assertion. 1206 InstanceKlass* inst = (InstanceKlass*)recv_klass(); 1207 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1208 } 1209 } 1210 1211 // check if method exists 1212 if (selected_method.is_null()) { 1213 ResourceMark rm(THREAD); 1214 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1215 Method::name_and_sig_as_C_string(resolved_klass(), 1216 resolved_method->name(), 1217 resolved_method->signature())); 1218 } 1219 1220 // check if abstract 1221 if (check_null_and_abstract && selected_method->is_abstract()) { 1222 ResourceMark rm(THREAD); 1223 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1224 Method::name_and_sig_as_C_string(resolved_klass(), 1225 selected_method->name(), 1226 selected_method->signature())); 1227 } 1228 1229 if (PrintVtables && Verbose) { 1230 ResourceMark rm(THREAD); 1231 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ", 1232 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1233 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1234 Method::name_and_sig_as_C_string(resolved_klass(), 1235 resolved_method->name(), 1236 resolved_method->signature()), 1237 selected_method->method_holder()->internal_name(), 1238 vtable_index 1239 ); 1240 selected_method->access_flags().print_on(tty); 1241 if (selected_method->is_default_method()) { 1242 tty->print("default "); 1243 } 1244 if (selected_method->is_overpass()) { 1245 tty->print("overpass"); 1246 } 1247 tty->cr(); 1248 } 1249 // setup result 1250 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 1251 } 1252 1253 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 1254 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1255 bool check_access, bool check_null_and_abstract, TRAPS) { 1256 methodHandle resolved_method; 1257 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1258 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 1259 } 1260 1261 // throws linktime exceptions 1262 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 1263 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 1264 // normal interface method resolution 1265 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1266 1267 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1268 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1269 } 1270 1271 // throws runtime exceptions 1272 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1273 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 1274 // check if receiver exists 1275 if (check_null_and_abstract && recv.is_null()) { 1276 THROW(vmSymbols::java_lang_NullPointerException()); 1277 } 1278 1279 // check if private interface method 1280 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1281 ResourceMark rm(THREAD); 1282 char buf[200]; 1283 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s", 1284 Method::name_and_sig_as_C_string(resolved_klass(), 1285 resolved_method->name(), 1286 resolved_method->signature())); 1287 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1288 } 1289 1290 // check if receiver klass implements the resolved interface 1291 if (!recv_klass->is_subtype_of(resolved_klass())) { 1292 ResourceMark rm(THREAD); 1293 char buf[200]; 1294 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 1295 recv_klass()->external_name(), 1296 resolved_klass()->external_name()); 1297 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1298 } 1299 1300 // do lookup based on receiver klass 1301 methodHandle sel_method; 1302 // This search must match the linktime preparation search for itable initialization 1303 // to correctly enforce loader constraints for interface method inheritance 1304 lookup_instance_method_in_klasses(sel_method, recv_klass, 1305 resolved_method->name(), 1306 resolved_method->signature(), CHECK); 1307 if (sel_method.is_null() && !check_null_and_abstract) { 1308 // In theory this is a harmless placeholder value, but 1309 // in practice leaving in null affects the nsk default method tests. 1310 // This needs further study. 1311 sel_method = resolved_method; 1312 } 1313 // check if method exists 1314 if (sel_method.is_null()) { 1315 ResourceMark rm(THREAD); 1316 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1317 Method::name_and_sig_as_C_string(recv_klass(), 1318 resolved_method->name(), 1319 resolved_method->signature())); 1320 } 1321 // check access 1322 // Throw Illegal Access Error if sel_method is not public. 1323 if (!sel_method->is_public()) { 1324 ResourceMark rm(THREAD); 1325 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 1326 Method::name_and_sig_as_C_string(recv_klass(), 1327 sel_method->name(), 1328 sel_method->signature())); 1329 } 1330 // check if abstract 1331 if (check_null_and_abstract && sel_method->is_abstract()) { 1332 ResourceMark rm(THREAD); 1333 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1334 Method::name_and_sig_as_C_string(recv_klass(), 1335 sel_method->name(), 1336 sel_method->signature())); 1337 } 1338 1339 if (TraceItables && Verbose) { 1340 ResourceMark rm(THREAD); 1341 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1342 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1343 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1344 Method::name_and_sig_as_C_string(resolved_klass(), 1345 resolved_method->name(), 1346 resolved_method->signature()), 1347 sel_method->method_holder()->internal_name() 1348 ); 1349 sel_method->access_flags().print_on(tty); 1350 if (sel_method->is_default_method()) { 1351 tty->print("default "); 1352 } 1353 if (sel_method->is_overpass()) { 1354 tty->print("overpass"); 1355 } 1356 tty->cr(); 1357 } 1358 // setup result 1359 if (!resolved_method->has_itable_index()) { 1360 int vtable_index = resolved_method->vtable_index(); 1361 assert(vtable_index == sel_method->vtable_index(), "sanity check"); 1362 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK); 1363 } else { 1364 int itable_index = resolved_method()->itable_index(); 1365 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK); 1366 } 1367 } 1368 1369 1370 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1371 KlassHandle resolved_klass, 1372 Symbol* method_name, 1373 Symbol* method_signature, 1374 KlassHandle current_klass, 1375 bool check_access) { 1376 EXCEPTION_MARK; 1377 methodHandle method_result; 1378 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1379 if (HAS_PENDING_EXCEPTION) { 1380 CLEAR_PENDING_EXCEPTION; 1381 return methodHandle(); 1382 } else { 1383 return method_result; 1384 } 1385 } 1386 1387 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1388 KlassHandle resolved_klass, 1389 Symbol* method_name, 1390 Symbol* method_signature, 1391 KlassHandle current_klass, 1392 bool check_access) { 1393 EXCEPTION_MARK; 1394 methodHandle method_result; 1395 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1396 if (HAS_PENDING_EXCEPTION) { 1397 CLEAR_PENDING_EXCEPTION; 1398 return methodHandle(); 1399 } else { 1400 return method_result; 1401 } 1402 } 1403 1404 methodHandle LinkResolver::resolve_virtual_call_or_null( 1405 KlassHandle receiver_klass, 1406 KlassHandle resolved_klass, 1407 Symbol* name, 1408 Symbol* signature, 1409 KlassHandle current_klass, 1410 bool check_access) { 1411 EXCEPTION_MARK; 1412 CallInfo info; 1413 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD); 1414 if (HAS_PENDING_EXCEPTION) { 1415 CLEAR_PENDING_EXCEPTION; 1416 return methodHandle(); 1417 } 1418 return info.selected_method(); 1419 } 1420 1421 methodHandle LinkResolver::resolve_interface_call_or_null( 1422 KlassHandle receiver_klass, 1423 KlassHandle resolved_klass, 1424 Symbol* name, 1425 Symbol* signature, 1426 KlassHandle current_klass, 1427 bool check_access) { 1428 EXCEPTION_MARK; 1429 CallInfo info; 1430 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, check_access, false, THREAD); 1431 if (HAS_PENDING_EXCEPTION) { 1432 CLEAR_PENDING_EXCEPTION; 1433 return methodHandle(); 1434 } 1435 return info.selected_method(); 1436 } 1437 1438 int LinkResolver::resolve_virtual_vtable_index( 1439 KlassHandle receiver_klass, 1440 KlassHandle resolved_klass, 1441 Symbol* name, 1442 Symbol* signature, 1443 KlassHandle current_klass) { 1444 EXCEPTION_MARK; 1445 CallInfo info; 1446 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1447 if (HAS_PENDING_EXCEPTION) { 1448 CLEAR_PENDING_EXCEPTION; 1449 return Method::invalid_vtable_index; 1450 } 1451 return info.vtable_index(); 1452 } 1453 1454 methodHandle LinkResolver::resolve_static_call_or_null( 1455 KlassHandle resolved_klass, 1456 Symbol* name, 1457 Symbol* signature, 1458 KlassHandle current_klass, 1459 bool check_access) { 1460 EXCEPTION_MARK; 1461 CallInfo info; 1462 resolve_static_call(info, resolved_klass, name, signature, current_klass, check_access, false, THREAD); 1463 if (HAS_PENDING_EXCEPTION) { 1464 CLEAR_PENDING_EXCEPTION; 1465 return methodHandle(); 1466 } 1467 return info.selected_method(); 1468 } 1469 1470 methodHandle LinkResolver::resolve_special_call_or_null( 1471 KlassHandle resolved_klass, 1472 Symbol* name, 1473 Symbol* signature, 1474 KlassHandle current_klass, 1475 bool check_access) { 1476 EXCEPTION_MARK; 1477 CallInfo info; 1478 resolve_special_call(info, resolved_klass, name, signature, current_klass, check_access, THREAD); 1479 if (HAS_PENDING_EXCEPTION) { 1480 CLEAR_PENDING_EXCEPTION; 1481 return methodHandle(); 1482 } 1483 return info.selected_method(); 1484 } 1485 1486 1487 1488 //------------------------------------------------------------------------------------------------------------------------ 1489 // ConstantPool entries 1490 1491 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1492 switch (byte) { 1493 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1494 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1495 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1496 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1497 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1498 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1499 } 1500 return; 1501 } 1502 1503 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1504 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1505 // resolve klass 1506 resolve_klass(resolved_klass, pool, index, CHECK); 1507 1508 // Get name, signature, and static klass 1509 method_name = pool->name_ref_at(index); 1510 method_signature = pool->signature_ref_at(index); 1511 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1512 } 1513 1514 1515 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1516 KlassHandle resolved_klass; 1517 Symbol* method_name = NULL; 1518 Symbol* method_signature = NULL; 1519 KlassHandle current_klass; 1520 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1521 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1522 } 1523 1524 1525 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1526 KlassHandle resolved_klass; 1527 Symbol* method_name = NULL; 1528 Symbol* method_signature = NULL; 1529 KlassHandle current_klass; 1530 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1531 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1532 } 1533 1534 1535 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1536 constantPoolHandle pool, int index, 1537 TRAPS) { 1538 1539 KlassHandle resolved_klass; 1540 Symbol* method_name = NULL; 1541 Symbol* method_signature = NULL; 1542 KlassHandle current_klass; 1543 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1544 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1545 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1546 } 1547 1548 1549 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1550 KlassHandle resolved_klass; 1551 Symbol* method_name = NULL; 1552 Symbol* method_signature = NULL; 1553 KlassHandle current_klass; 1554 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1555 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1556 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1557 } 1558 1559 1560 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1561 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1562 KlassHandle resolved_klass; 1563 Symbol* method_name = NULL; 1564 Symbol* method_signature = NULL; 1565 KlassHandle current_klass; 1566 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1567 if (TraceMethodHandles) { 1568 ResourceMark rm(THREAD); 1569 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); 1570 } 1571 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); 1572 } 1573 1574 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, 1575 Symbol* method_name, Symbol* method_signature, 1576 KlassHandle current_klass, 1577 TRAPS) { 1578 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1579 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); 1580 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); 1581 methodHandle resolved_method; 1582 Handle resolved_appendix; 1583 Handle resolved_method_type; 1584 lookup_polymorphic_method(resolved_method, resolved_klass, 1585 method_name, method_signature, 1586 current_klass, &resolved_appendix, &resolved_method_type, CHECK); 1587 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1588 } 1589 1590 1591 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1592 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); 1593 Symbol* method_name = pool->name_ref_at(index); 1594 Symbol* method_signature = pool->signature_ref_at(index); 1595 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); 1596 1597 // Resolve the bootstrap specifier (BSM + optional arguments). 1598 Handle bootstrap_specifier; 1599 // Check if CallSite has been bound already: 1600 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); 1601 if (cpce->is_f1_null()) { 1602 int pool_index = cpce->constant_pool_index(); 1603 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); 1604 assert(bsm_info != NULL, ""); 1605 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1606 bootstrap_specifier = Handle(THREAD, bsm_info); 1607 } 1608 if (!cpce->is_f1_null()) { 1609 methodHandle method( THREAD, cpce->f1_as_method()); 1610 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1611 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1612 result.set_handle(method, appendix, method_type, CHECK); 1613 return; 1614 } 1615 1616 if (TraceMethodHandles) { 1617 ResourceMark rm(THREAD); 1618 tty->print_cr("resolve_invokedynamic #%d %s %s", 1619 ConstantPool::decode_invokedynamic_index(index), 1620 method_name->as_C_string(), method_signature->as_C_string()); 1621 tty->print(" BSM info: "); bootstrap_specifier->print(); 1622 } 1623 1624 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); 1625 } 1626 1627 void LinkResolver::resolve_dynamic_call(CallInfo& result, 1628 Handle bootstrap_specifier, 1629 Symbol* method_name, Symbol* method_signature, 1630 KlassHandle current_klass, 1631 TRAPS) { 1632 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1633 // The appendix argument is likely to be a freshly-created CallSite. 1634 Handle resolved_appendix; 1635 Handle resolved_method_type; 1636 methodHandle resolved_method = 1637 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1638 bootstrap_specifier, 1639 method_name, method_signature, 1640 &resolved_appendix, 1641 &resolved_method_type, 1642 THREAD); 1643 if (HAS_PENDING_EXCEPTION) { 1644 if (TraceMethodHandles) { 1645 tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION)); 1646 PENDING_EXCEPTION->print(); 1647 } 1648 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1649 // throw these guys, since they are already wrapped 1650 return; 1651 } 1652 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1653 // intercept only LinkageErrors which might have failed to wrap 1654 return; 1655 } 1656 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1657 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1658 CLEAR_PENDING_EXCEPTION; 1659 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1660 } 1661 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1662 } 1663 1664 //------------------------------------------------------------------------------------------------------------------------ 1665 #ifndef PRODUCT 1666 1667 void CallInfo::print() { 1668 ResourceMark rm; 1669 const char* kindstr = "unknown"; 1670 switch (_call_kind) { 1671 case direct_call: kindstr = "direct"; break; 1672 case vtable_call: kindstr = "vtable"; break; 1673 case itable_call: kindstr = "itable"; break; 1674 } 1675 tty->print_cr("Call %s@%d %s", kindstr, _call_index, 1676 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string()); 1677 } 1678 1679 #endif