1 /* 2 * Copyright (c) 1997, 2013, 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. check if method is concrete 568 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { 569 ResourceMark rm(THREAD); 570 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 571 Method::name_and_sig_as_C_string(resolved_klass(), 572 method_name, 573 method_signature)); 574 } 575 576 // 6. access checks, access checking may be turned off when calling from within the VM. 577 if (check_access) { 578 assert(current_klass.not_null() , "current_klass should not be null"); 579 580 // check if method can be accessed by the referring class 581 check_method_accessability(current_klass, 582 resolved_klass, 583 KlassHandle(THREAD, resolved_method->method_holder()), 584 resolved_method, 585 CHECK); 586 587 // check loader constraints 588 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 589 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 590 { 591 ResourceMark rm(THREAD); 592 Symbol* failed_type_symbol = 593 SystemDictionary::check_signature_loaders(method_signature, loader, 594 class_loader, true, CHECK); 595 if (failed_type_symbol != NULL) { 596 const char* msg = "loader constraint violation: when resolving method" 597 " \"%s\" the class loader (instance of %s) of the current class, %s," 598 " and the class loader (instance of %s) for the method's defining class, %s, have" 599 " different Class objects for the type %s used in the signature"; 600 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 601 const char* loader1 = SystemDictionary::loader_name(loader()); 602 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 603 const char* loader2 = SystemDictionary::loader_name(class_loader()); 604 char* target = InstanceKlass::cast(resolved_method->method_holder()) 605 ->name()->as_C_string(); 606 char* failed_type_name = failed_type_symbol->as_C_string(); 607 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 608 strlen(current) + strlen(loader2) + strlen(target) + 609 strlen(failed_type_name) + 1; 610 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 611 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 612 target, failed_type_name); 613 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 614 } 615 } 616 } 617 } 618 619 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 620 KlassHandle resolved_klass, 621 Symbol* method_name, 622 Symbol* method_signature, 623 KlassHandle current_klass, 624 bool check_access, 625 bool nostatics, TRAPS) { 626 627 // check if klass is interface 628 if (!resolved_klass->is_interface()) { 629 ResourceMark rm(THREAD); 630 char buf[200]; 631 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); 632 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 633 } 634 635 // lookup method in this interface or its super, java.lang.Object 636 // JDK8: also look for static methods 637 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK); 638 639 if (resolved_method.is_null()) { 640 // lookup method in all the super-interfaces 641 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 642 if (resolved_method.is_null()) { 643 // no method found 644 ResourceMark rm(THREAD); 645 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 646 Method::name_and_sig_as_C_string(resolved_klass(), 647 method_name, 648 method_signature)); 649 } 650 } 651 652 if (nostatics && resolved_method->is_static()) { 653 ResourceMark rm(THREAD); 654 char buf[200]; 655 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 656 resolved_method->name(), 657 resolved_method->signature())); 658 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 659 } 660 661 662 if (check_access) { 663 // JDK8 adds non-public interface methods, and accessability check requirement 664 assert(current_klass.not_null() , "current_klass should not be null"); 665 666 // check if method can be accessed by the referring class 667 check_method_accessability(current_klass, 668 resolved_klass, 669 KlassHandle(THREAD, resolved_method->method_holder()), 670 resolved_method, 671 CHECK); 672 673 HandleMark hm(THREAD); 674 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 675 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 676 { 677 ResourceMark rm(THREAD); 678 Symbol* failed_type_symbol = 679 SystemDictionary::check_signature_loaders(method_signature, loader, 680 class_loader, true, CHECK); 681 if (failed_type_symbol != NULL) { 682 const char* msg = "loader constraint violation: when resolving " 683 "interface method \"%s\" the class loader (instance of %s) of the " 684 "current class, %s, and the class loader (instance of %s) for " 685 "the method's defining class, %s, have different Class objects for the type %s " 686 "used in the signature"; 687 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 688 const char* loader1 = SystemDictionary::loader_name(loader()); 689 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 690 const char* loader2 = SystemDictionary::loader_name(class_loader()); 691 char* target = InstanceKlass::cast(resolved_method->method_holder()) 692 ->name()->as_C_string(); 693 char* failed_type_name = failed_type_symbol->as_C_string(); 694 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 695 strlen(current) + strlen(loader2) + strlen(target) + 696 strlen(failed_type_name) + 1; 697 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 698 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 699 target, failed_type_name); 700 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 701 } 702 } 703 } 704 705 if (TraceItables && Verbose) { 706 ResourceMark rm(THREAD); 707 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 708 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 709 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 710 Method::name_and_sig_as_C_string(resolved_klass(), 711 resolved_method->name(), 712 resolved_method->signature()), 713 resolved_method->method_holder()->internal_name() 714 ); 715 resolved_method->access_flags().print_on(tty); 716 if (resolved_method->is_default_method()) { 717 tty->print("default "); 718 } 719 if (resolved_method->is_overpass()) { 720 tty->print("overpass"); 721 } 722 tty->cr(); 723 } 724 } 725 726 //------------------------------------------------------------------------------------------------------------------------ 727 // Field resolution 728 729 void LinkResolver::check_field_accessability(KlassHandle ref_klass, 730 KlassHandle resolved_klass, 731 KlassHandle sel_klass, 732 fieldDescriptor& fd, 733 TRAPS) { 734 if (!Reflection::verify_field_access(ref_klass(), 735 resolved_klass(), 736 sel_klass(), 737 fd.access_flags(), 738 true)) { 739 ResourceMark rm(THREAD); 740 Exceptions::fthrow( 741 THREAD_AND_LOCATION, 742 vmSymbols::java_lang_IllegalAccessError(), 743 "tried to access field %s.%s from class %s", 744 sel_klass->external_name(), 745 fd.name()->as_C_string(), 746 ref_klass->external_name() 747 ); 748 return; 749 } 750 } 751 752 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 753 // Load these early in case the resolve of the containing klass fails 754 Symbol* field = pool->name_ref_at(index); 755 Symbol* sig = pool->signature_ref_at(index); 756 757 // resolve specified klass 758 KlassHandle resolved_klass; 759 resolve_klass(resolved_klass, pool, index, CHECK); 760 761 KlassHandle current_klass(THREAD, pool->pool_holder()); 762 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK); 763 } 764 765 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig, 766 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class, 767 TRAPS) { 768 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 769 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield || 770 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode"); 771 772 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 773 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); 774 775 // Check if there's a resolved klass containing the field 776 if (resolved_klass.is_null()) { 777 ResourceMark rm(THREAD); 778 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 779 } 780 781 // Resolve instance field 782 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); 783 // check if field exists; i.e., if a klass containing the field def has been selected 784 if (sel_klass.is_null()) { 785 ResourceMark rm(THREAD); 786 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 787 } 788 789 if (!check_access) 790 // Access checking may be turned off when calling from within the VM. 791 return; 792 793 // check access 794 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK); 795 796 // check for errors 797 if (is_static != fd.is_static()) { 798 ResourceMark rm(THREAD); 799 char msg[200]; 800 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string()); 801 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 802 } 803 804 // Final fields can only be accessed from its own class. 805 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) { 806 THROW(vmSymbols::java_lang_IllegalAccessError()); 807 } 808 809 // initialize resolved_klass if necessary 810 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 811 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 812 // 813 // note 2: we don't want to force initialization if we are just checking 814 // if the field access is legal; e.g., during compilation 815 if (is_static && initialize_class) { 816 sel_klass->initialize(CHECK); 817 } 818 819 if (sel_klass() != current_klass()) { 820 HandleMark hm(THREAD); 821 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 822 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); 823 { 824 ResourceMark rm(THREAD); 825 Symbol* failed_type_symbol = 826 SystemDictionary::check_signature_loaders(sig, 827 ref_loader, sel_loader, 828 false, 829 CHECK); 830 if (failed_type_symbol != NULL) { 831 const char* msg = "loader constraint violation: when resolving field" 832 " \"%s\" the class loader (instance of %s) of the referring class, " 833 "%s, and the class loader (instance of %s) for the field's resolved " 834 "type, %s, have different Class objects for that type"; 835 char* field_name = field->as_C_string(); 836 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 837 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); 838 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 839 char* failed_type_name = failed_type_symbol->as_C_string(); 840 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 841 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1; 842 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 843 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 844 failed_type_name); 845 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 846 } 847 } 848 } 849 850 // return information. note that the klass is set to the actual klass containing the 851 // field, otherwise access of static fields in superclasses will not work. 852 } 853 854 855 //------------------------------------------------------------------------------------------------------------------------ 856 // Invoke resolution 857 // 858 // Naming conventions: 859 // 860 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 861 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 862 // resolved_klass the specified klass (i.e., specified via constant pool index) 863 // recv_klass the receiver klass 864 865 866 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 867 Symbol* method_signature, KlassHandle current_klass, 868 bool check_access, bool initialize_class, TRAPS) { 869 methodHandle resolved_method; 870 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 871 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); 872 873 // Initialize klass (this should only happen if everything is ok) 874 if (initialize_class && resolved_klass->should_be_initialized()) { 875 resolved_klass->initialize(CHECK); 876 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 877 } 878 879 // setup result 880 result.set_static(resolved_klass, resolved_method, CHECK); 881 } 882 883 // throws linktime exceptions 884 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 885 Symbol* method_name, Symbol* method_signature, 886 KlassHandle current_klass, bool check_access, TRAPS) { 887 888 if (!resolved_klass->is_interface()) { 889 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 890 } else { 891 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 892 } 893 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 894 895 // check if static 896 if (!resolved_method->is_static()) { 897 ResourceMark rm(THREAD); 898 char buf[200]; 899 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 900 resolved_method->name(), 901 resolved_method->signature())); 902 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 903 } 904 } 905 906 907 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 908 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 909 methodHandle resolved_method; 910 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 911 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 912 } 913 914 // throws linktime exceptions 915 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 916 Symbol* method_name, Symbol* method_signature, 917 KlassHandle current_klass, bool check_access, TRAPS) { 918 919 // Invokespecial is called for multiple special reasons: 920 // <init> 921 // local private method invocation, for classes and interfaces 922 // superclass.method, which can also resolve to a default method 923 // and the selected method is recalculated relative to the direct superclass 924 // superinterface.method, which explicitly does not check shadowing 925 926 if (!resolved_klass->is_interface()) { 927 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 928 } else { 929 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 930 } 931 932 // check if method name is <init>, that it is found in same klass as static type 933 if (resolved_method->name() == vmSymbols::object_initializer_name() && 934 resolved_method->method_holder() != resolved_klass()) { 935 ResourceMark rm(THREAD); 936 Exceptions::fthrow( 937 THREAD_AND_LOCATION, 938 vmSymbols::java_lang_NoSuchMethodError(), 939 "%s: method %s%s not found", 940 resolved_klass->external_name(), 941 resolved_method->name()->as_C_string(), 942 resolved_method->signature()->as_C_string() 943 ); 944 return; 945 } 946 947 // check if invokespecial's interface method reference is in an indirect superinterface 948 if (!current_klass.is_null() && resolved_klass->is_interface()) { 949 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ? 950 current_klass() : 951 InstanceKlass::cast(current_klass())->host_klass(); 952 // As of the fix for 4486457 we disable verification for all of the 953 // dynamically-generated bytecodes associated with the 1.4 954 // reflection implementation, not just those associated with 955 // sun/reflect/SerializationConstructorAccessor. 956 bool is_reflect = JDK_Version::is_gte_jdk14x_version() && 957 UseNewReflection && 958 klass_to_check->is_subclass_of( 959 SystemDictionary::reflect_MagicAccessorImpl_klass()); 960 961 if (!is_reflect && 962 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) { 963 ResourceMark rm(THREAD); 964 char buf[200]; 965 jio_snprintf(buf, sizeof(buf), 966 "Interface method reference: %s, is in an indirect superinterface of %s", 967 Method::name_and_sig_as_C_string(resolved_klass(), 968 resolved_method->name(), 969 resolved_method->signature()), 970 current_klass->external_name()); 971 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 972 } 973 } 974 975 // check if not static 976 if (resolved_method->is_static()) { 977 ResourceMark rm(THREAD); 978 char buf[200]; 979 jio_snprintf(buf, sizeof(buf), 980 "Expecting non-static method %s", 981 Method::name_and_sig_as_C_string(resolved_klass(), 982 resolved_method->name(), 983 resolved_method->signature())); 984 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 985 } 986 987 if (TraceItables && Verbose) { 988 ResourceMark rm(THREAD); 989 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 990 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 991 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 992 Method::name_and_sig_as_C_string(resolved_klass(), 993 resolved_method->name(), 994 resolved_method->signature()), 995 resolved_method->method_holder()->internal_name() 996 ); 997 resolved_method->access_flags().print_on(tty); 998 if (resolved_method->is_default_method()) { 999 tty->print("default "); 1000 } 1001 if (resolved_method->is_overpass()) { 1002 tty->print("overpass"); 1003 } 1004 tty->cr(); 1005 } 1006 } 1007 1008 // throws runtime exceptions 1009 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1010 KlassHandle current_klass, bool check_access, TRAPS) { 1011 1012 // resolved method is selected method unless we have an old-style lookup 1013 // for a superclass method 1014 // Invokespecial for a superinterface, resolved method is selected method, 1015 // no checks for shadowing 1016 methodHandle sel_method(THREAD, resolved_method()); 1017 1018 // check if this is an old-style super call and do a new lookup if so 1019 { KlassHandle method_klass = KlassHandle(THREAD, 1020 resolved_method->method_holder()); 1021 1022 if (check_access && 1023 // a) check if ACC_SUPER flag is set for the current class 1024 (current_klass->is_super() || !AllowNonVirtualCalls) && 1025 // b) check if the class of the resolved_klass is a superclass 1026 // (not supertype in order to exclude interface classes) of the current class. 1027 // This check is not performed for super.invoke for interface methods 1028 // in super interfaces. 1029 current_klass->is_subclass_of(resolved_klass()) && 1030 current_klass() != resolved_klass() && 1031 // c) check if the method is not <init> 1032 resolved_method->name() != vmSymbols::object_initializer_name()) { 1033 // Lookup super method 1034 KlassHandle super_klass(THREAD, current_klass->super()); 1035 lookup_instance_method_in_klasses(sel_method, super_klass, 1036 resolved_method->name(), 1037 resolved_method->signature(), CHECK); 1038 // check if found 1039 if (sel_method.is_null()) { 1040 ResourceMark rm(THREAD); 1041 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1042 Method::name_and_sig_as_C_string(resolved_klass(), 1043 resolved_method->name(), 1044 resolved_method->signature())); 1045 } 1046 } 1047 } 1048 1049 // check if not static 1050 if (sel_method->is_static()) { 1051 ResourceMark rm(THREAD); 1052 char buf[200]; 1053 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1054 resolved_method->name(), 1055 resolved_method->signature())); 1056 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1057 } 1058 1059 // check if abstract 1060 if (sel_method->is_abstract()) { 1061 ResourceMark rm(THREAD); 1062 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1063 Method::name_and_sig_as_C_string(resolved_klass(), 1064 sel_method->name(), 1065 sel_method->signature())); 1066 } 1067 1068 if (TraceItables && Verbose) { 1069 ResourceMark rm(THREAD); 1070 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1071 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1072 Method::name_and_sig_as_C_string(resolved_klass(), 1073 sel_method->name(), 1074 sel_method->signature()), 1075 sel_method->method_holder()->internal_name() 1076 ); 1077 sel_method->access_flags().print_on(tty); 1078 if (sel_method->is_default_method()) { 1079 tty->print("default "); 1080 } 1081 if (sel_method->is_overpass()) { 1082 tty->print("overpass"); 1083 } 1084 tty->cr(); 1085 } 1086 1087 // setup result 1088 result.set_static(resolved_klass, sel_method, CHECK); 1089 } 1090 1091 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 1092 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1093 bool check_access, bool check_null_and_abstract, TRAPS) { 1094 methodHandle resolved_method; 1095 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1096 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 1097 } 1098 1099 // throws linktime exceptions 1100 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 1101 Symbol* method_name, Symbol* method_signature, 1102 KlassHandle current_klass, bool check_access, TRAPS) { 1103 // normal method resolution 1104 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1105 1106 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1107 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1108 1109 // check if private interface method 1110 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1111 ResourceMark rm(THREAD); 1112 char buf[200]; 1113 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s", 1114 Method::name_and_sig_as_C_string(resolved_klass(), 1115 resolved_method->name(), 1116 resolved_method->signature()), 1117 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name())); 1118 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1119 } 1120 1121 // check if not static 1122 if (resolved_method->is_static()) { 1123 ResourceMark rm(THREAD); 1124 char buf[200]; 1125 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1126 resolved_method->name(), 1127 resolved_method->signature())); 1128 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1129 } 1130 1131 if (PrintVtables && Verbose) { 1132 ResourceMark rm(THREAD); 1133 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 1134 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 1135 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1136 Method::name_and_sig_as_C_string(resolved_klass(), 1137 resolved_method->name(), 1138 resolved_method->signature()), 1139 resolved_method->method_holder()->internal_name() 1140 ); 1141 resolved_method->access_flags().print_on(tty); 1142 if (resolved_method->is_default_method()) { 1143 tty->print("default "); 1144 } 1145 if (resolved_method->is_overpass()) { 1146 tty->print("overpass"); 1147 } 1148 tty->cr(); 1149 } 1150 } 1151 1152 // throws runtime exceptions 1153 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 1154 methodHandle resolved_method, 1155 KlassHandle resolved_klass, 1156 Handle recv, 1157 KlassHandle recv_klass, 1158 bool check_null_and_abstract, 1159 TRAPS) { 1160 1161 // setup default return values 1162 int vtable_index = Method::invalid_vtable_index; 1163 methodHandle selected_method; 1164 1165 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 1166 1167 // runtime method resolution 1168 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 1169 THROW(vmSymbols::java_lang_NullPointerException()); 1170 } 1171 1172 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s 1173 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 1174 // a missing receiver might result in a bogus lookup. 1175 assert(resolved_method->method_holder()->is_linked(), "must be linked"); 1176 1177 // do lookup based on receiver klass using the vtable index 1178 if (resolved_method->method_holder()->is_interface()) { // miranda method 1179 vtable_index = vtable_index_of_interface_method(resolved_klass, 1180 resolved_method); 1181 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 1182 1183 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); 1184 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1185 } else { 1186 // at this point we are sure that resolved_method is virtual and not 1187 // a miranda method; therefore, it must have a valid vtable index. 1188 assert(!resolved_method->has_itable_index(), ""); 1189 vtable_index = resolved_method->vtable_index(); 1190 // We could get a negative vtable_index for final methods, 1191 // because as an optimization they are they are never put in the vtable, 1192 // unless they override an existing method. 1193 // If we do get a negative, it means the resolved method is the the selected 1194 // method, and it can never be changed by an override. 1195 if (vtable_index == Method::nonvirtual_vtable_index) { 1196 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 1197 selected_method = resolved_method; 1198 } else { 1199 // recv_klass might be an arrayKlassOop but all vtables start at 1200 // the same place. The cast is to avoid virtual call and assertion. 1201 InstanceKlass* inst = (InstanceKlass*)recv_klass(); 1202 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1203 } 1204 } 1205 1206 // check if method exists 1207 if (selected_method.is_null()) { 1208 ResourceMark rm(THREAD); 1209 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1210 Method::name_and_sig_as_C_string(resolved_klass(), 1211 resolved_method->name(), 1212 resolved_method->signature())); 1213 } 1214 1215 // check if abstract 1216 if (check_null_and_abstract && selected_method->is_abstract()) { 1217 ResourceMark rm(THREAD); 1218 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1219 Method::name_and_sig_as_C_string(resolved_klass(), 1220 selected_method->name(), 1221 selected_method->signature())); 1222 } 1223 1224 if (PrintVtables && Verbose) { 1225 ResourceMark rm(THREAD); 1226 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ", 1227 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1228 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1229 Method::name_and_sig_as_C_string(resolved_klass(), 1230 resolved_method->name(), 1231 resolved_method->signature()), 1232 selected_method->method_holder()->internal_name(), 1233 vtable_index 1234 ); 1235 selected_method->access_flags().print_on(tty); 1236 if (selected_method->is_default_method()) { 1237 tty->print("default "); 1238 } 1239 if (selected_method->is_overpass()) { 1240 tty->print("overpass"); 1241 } 1242 tty->cr(); 1243 } 1244 // setup result 1245 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 1246 } 1247 1248 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 1249 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1250 bool check_access, bool check_null_and_abstract, TRAPS) { 1251 methodHandle resolved_method; 1252 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1253 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 1254 } 1255 1256 // throws linktime exceptions 1257 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 1258 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 1259 // normal interface method resolution 1260 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1261 1262 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1263 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1264 } 1265 1266 // throws runtime exceptions 1267 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1268 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 1269 // check if receiver exists 1270 if (check_null_and_abstract && recv.is_null()) { 1271 THROW(vmSymbols::java_lang_NullPointerException()); 1272 } 1273 1274 // check if private interface method 1275 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1276 ResourceMark rm(THREAD); 1277 char buf[200]; 1278 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s", 1279 Method::name_and_sig_as_C_string(resolved_klass(), 1280 resolved_method->name(), 1281 resolved_method->signature())); 1282 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1283 } 1284 1285 // check if receiver klass implements the resolved interface 1286 if (!recv_klass->is_subtype_of(resolved_klass())) { 1287 ResourceMark rm(THREAD); 1288 char buf[200]; 1289 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 1290 recv_klass()->external_name(), 1291 resolved_klass()->external_name()); 1292 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1293 } 1294 1295 // do lookup based on receiver klass 1296 methodHandle sel_method; 1297 // This search must match the linktime preparation search for itable initialization 1298 // to correctly enforce loader constraints for interface method inheritance 1299 lookup_instance_method_in_klasses(sel_method, recv_klass, 1300 resolved_method->name(), 1301 resolved_method->signature(), CHECK); 1302 if (sel_method.is_null() && !check_null_and_abstract) { 1303 // In theory this is a harmless placeholder value, but 1304 // in practice leaving in null affects the nsk default method tests. 1305 // This needs further study. 1306 sel_method = resolved_method; 1307 } 1308 // check if method exists 1309 if (sel_method.is_null()) { 1310 ResourceMark rm(THREAD); 1311 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1312 Method::name_and_sig_as_C_string(recv_klass(), 1313 resolved_method->name(), 1314 resolved_method->signature())); 1315 } 1316 // check access 1317 // Throw Illegal Access Error if sel_method is not public. 1318 if (!sel_method->is_public()) { 1319 ResourceMark rm(THREAD); 1320 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 1321 Method::name_and_sig_as_C_string(recv_klass(), 1322 sel_method->name(), 1323 sel_method->signature())); 1324 } 1325 // check if abstract 1326 if (check_null_and_abstract && sel_method->is_abstract()) { 1327 ResourceMark rm(THREAD); 1328 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1329 Method::name_and_sig_as_C_string(recv_klass(), 1330 sel_method->name(), 1331 sel_method->signature())); 1332 } 1333 1334 if (TraceItables && Verbose) { 1335 ResourceMark rm(THREAD); 1336 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1337 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1338 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1339 Method::name_and_sig_as_C_string(resolved_klass(), 1340 resolved_method->name(), 1341 resolved_method->signature()), 1342 sel_method->method_holder()->internal_name() 1343 ); 1344 sel_method->access_flags().print_on(tty); 1345 if (sel_method->is_default_method()) { 1346 tty->print("default "); 1347 } 1348 if (sel_method->is_overpass()) { 1349 tty->print("overpass"); 1350 } 1351 tty->cr(); 1352 } 1353 // setup result 1354 if (!resolved_method->has_itable_index()) { 1355 int vtable_index = resolved_method->vtable_index(); 1356 assert(vtable_index == sel_method->vtable_index(), "sanity check"); 1357 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK); 1358 } else { 1359 int itable_index = resolved_method()->itable_index(); 1360 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK); 1361 } 1362 } 1363 1364 1365 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1366 KlassHandle resolved_klass, 1367 Symbol* method_name, 1368 Symbol* method_signature, 1369 KlassHandle current_klass, 1370 bool check_access) { 1371 EXCEPTION_MARK; 1372 methodHandle method_result; 1373 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1374 if (HAS_PENDING_EXCEPTION) { 1375 CLEAR_PENDING_EXCEPTION; 1376 return methodHandle(); 1377 } else { 1378 return method_result; 1379 } 1380 } 1381 1382 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1383 KlassHandle resolved_klass, 1384 Symbol* method_name, 1385 Symbol* method_signature, 1386 KlassHandle current_klass, 1387 bool check_access) { 1388 EXCEPTION_MARK; 1389 methodHandle method_result; 1390 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1391 if (HAS_PENDING_EXCEPTION) { 1392 CLEAR_PENDING_EXCEPTION; 1393 return methodHandle(); 1394 } else { 1395 return method_result; 1396 } 1397 } 1398 1399 methodHandle LinkResolver::resolve_virtual_call_or_null( 1400 KlassHandle receiver_klass, 1401 KlassHandle resolved_klass, 1402 Symbol* name, 1403 Symbol* signature, 1404 KlassHandle current_klass) { 1405 EXCEPTION_MARK; 1406 CallInfo info; 1407 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1408 if (HAS_PENDING_EXCEPTION) { 1409 CLEAR_PENDING_EXCEPTION; 1410 return methodHandle(); 1411 } 1412 return info.selected_method(); 1413 } 1414 1415 methodHandle LinkResolver::resolve_interface_call_or_null( 1416 KlassHandle receiver_klass, 1417 KlassHandle resolved_klass, 1418 Symbol* name, 1419 Symbol* signature, 1420 KlassHandle current_klass) { 1421 EXCEPTION_MARK; 1422 CallInfo info; 1423 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1424 if (HAS_PENDING_EXCEPTION) { 1425 CLEAR_PENDING_EXCEPTION; 1426 return methodHandle(); 1427 } 1428 return info.selected_method(); 1429 } 1430 1431 int LinkResolver::resolve_virtual_vtable_index( 1432 KlassHandle receiver_klass, 1433 KlassHandle resolved_klass, 1434 Symbol* name, 1435 Symbol* signature, 1436 KlassHandle current_klass) { 1437 EXCEPTION_MARK; 1438 CallInfo info; 1439 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1440 if (HAS_PENDING_EXCEPTION) { 1441 CLEAR_PENDING_EXCEPTION; 1442 return Method::invalid_vtable_index; 1443 } 1444 return info.vtable_index(); 1445 } 1446 1447 methodHandle LinkResolver::resolve_static_call_or_null( 1448 KlassHandle resolved_klass, 1449 Symbol* name, 1450 Symbol* signature, 1451 KlassHandle current_klass) { 1452 EXCEPTION_MARK; 1453 CallInfo info; 1454 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); 1455 if (HAS_PENDING_EXCEPTION) { 1456 CLEAR_PENDING_EXCEPTION; 1457 return methodHandle(); 1458 } 1459 return info.selected_method(); 1460 } 1461 1462 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, 1463 KlassHandle current_klass) { 1464 EXCEPTION_MARK; 1465 CallInfo info; 1466 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); 1467 if (HAS_PENDING_EXCEPTION) { 1468 CLEAR_PENDING_EXCEPTION; 1469 return methodHandle(); 1470 } 1471 return info.selected_method(); 1472 } 1473 1474 1475 1476 //------------------------------------------------------------------------------------------------------------------------ 1477 // ConstantPool entries 1478 1479 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1480 switch (byte) { 1481 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1482 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1483 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1484 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1485 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1486 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1487 } 1488 return; 1489 } 1490 1491 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1492 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1493 // resolve klass 1494 resolve_klass(resolved_klass, pool, index, CHECK); 1495 1496 // Get name, signature, and static klass 1497 method_name = pool->name_ref_at(index); 1498 method_signature = pool->signature_ref_at(index); 1499 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1500 } 1501 1502 1503 void LinkResolver::resolve_invokestatic(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_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1510 } 1511 1512 1513 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1514 KlassHandle resolved_klass; 1515 Symbol* method_name = NULL; 1516 Symbol* method_signature = NULL; 1517 KlassHandle current_klass; 1518 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1519 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1520 } 1521 1522 1523 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1524 constantPoolHandle pool, int index, 1525 TRAPS) { 1526 1527 KlassHandle resolved_klass; 1528 Symbol* method_name = NULL; 1529 Symbol* method_signature = NULL; 1530 KlassHandle current_klass; 1531 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1532 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1533 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1534 } 1535 1536 1537 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1538 KlassHandle resolved_klass; 1539 Symbol* method_name = NULL; 1540 Symbol* method_signature = NULL; 1541 KlassHandle current_klass; 1542 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1543 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1544 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1545 } 1546 1547 1548 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1549 assert(EnableInvokeDynamic, ""); 1550 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1551 KlassHandle resolved_klass; 1552 Symbol* method_name = NULL; 1553 Symbol* method_signature = NULL; 1554 KlassHandle current_klass; 1555 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1556 if (TraceMethodHandles) { 1557 ResourceMark rm(THREAD); 1558 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); 1559 } 1560 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); 1561 } 1562 1563 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, 1564 Symbol* method_name, Symbol* method_signature, 1565 KlassHandle current_klass, 1566 TRAPS) { 1567 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1568 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); 1569 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); 1570 methodHandle resolved_method; 1571 Handle resolved_appendix; 1572 Handle resolved_method_type; 1573 lookup_polymorphic_method(resolved_method, resolved_klass, 1574 method_name, method_signature, 1575 current_klass, &resolved_appendix, &resolved_method_type, CHECK); 1576 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1577 } 1578 1579 1580 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1581 assert(EnableInvokeDynamic, ""); 1582 1583 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); 1584 Symbol* method_name = pool->name_ref_at(index); 1585 Symbol* method_signature = pool->signature_ref_at(index); 1586 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); 1587 1588 // Resolve the bootstrap specifier (BSM + optional arguments). 1589 Handle bootstrap_specifier; 1590 // Check if CallSite has been bound already: 1591 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); 1592 if (cpce->is_f1_null()) { 1593 int pool_index = cpce->constant_pool_index(); 1594 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); 1595 assert(bsm_info != NULL, ""); 1596 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1597 bootstrap_specifier = Handle(THREAD, bsm_info); 1598 } 1599 if (!cpce->is_f1_null()) { 1600 methodHandle method( THREAD, cpce->f1_as_method()); 1601 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1602 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1603 result.set_handle(method, appendix, method_type, CHECK); 1604 return; 1605 } 1606 1607 if (TraceMethodHandles) { 1608 ResourceMark rm(THREAD); 1609 tty->print_cr("resolve_invokedynamic #%d %s %s", 1610 ConstantPool::decode_invokedynamic_index(index), 1611 method_name->as_C_string(), method_signature->as_C_string()); 1612 tty->print(" BSM info: "); bootstrap_specifier->print(); 1613 } 1614 1615 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); 1616 } 1617 1618 void LinkResolver::resolve_dynamic_call(CallInfo& result, 1619 Handle bootstrap_specifier, 1620 Symbol* method_name, Symbol* method_signature, 1621 KlassHandle current_klass, 1622 TRAPS) { 1623 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1624 // The appendix argument is likely to be a freshly-created CallSite. 1625 Handle resolved_appendix; 1626 Handle resolved_method_type; 1627 methodHandle resolved_method = 1628 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1629 bootstrap_specifier, 1630 method_name, method_signature, 1631 &resolved_appendix, 1632 &resolved_method_type, 1633 THREAD); 1634 if (HAS_PENDING_EXCEPTION) { 1635 if (TraceMethodHandles) { 1636 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION); 1637 PENDING_EXCEPTION->print(); 1638 } 1639 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1640 // throw these guys, since they are already wrapped 1641 return; 1642 } 1643 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1644 // intercept only LinkageErrors which might have failed to wrap 1645 return; 1646 } 1647 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1648 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1649 CLEAR_PENDING_EXCEPTION; 1650 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1651 } 1652 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1653 } 1654 1655 //------------------------------------------------------------------------------------------------------------------------ 1656 #ifndef PRODUCT 1657 1658 void CallInfo::print() { 1659 ResourceMark rm; 1660 const char* kindstr = "unknown"; 1661 switch (_call_kind) { 1662 case direct_call: kindstr = "direct"; break; 1663 case vtable_call: kindstr = "vtable"; break; 1664 case itable_call: kindstr = "itable"; break; 1665 } 1666 tty->print_cr("Call %s@%d %s", kindstr, _call_index, 1667 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string()); 1668 } 1669 1670 #endif