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, TRAPS) { 246 Method* result_oop = klass->uncached_lookup_method(name, signature); 247 if (result_oop == NULL) { 248 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 249 if (default_methods != NULL) { 250 result_oop = InstanceKlass::find_method(default_methods, name, signature); 251 } 252 } 253 254 if (EnableInvokeDynamic && result_oop != NULL) { 255 vmIntrinsics::ID iid = result_oop->intrinsic_id(); 256 if (MethodHandles::is_signature_polymorphic(iid)) { 257 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. 258 return; 259 } 260 } 261 result = methodHandle(THREAD, result_oop); 262 } 263 264 // returns first instance method 265 // Looks up method in classes, then looks up local default methods 266 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 267 Method* result_oop = klass->uncached_lookup_method(name, signature); 268 result = methodHandle(THREAD, result_oop); 269 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) { 270 klass = KlassHandle(THREAD, result->method_holder()->super()); 271 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); 272 } 273 274 if (result.is_null()) { 275 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods(); 276 if (default_methods != NULL) { 277 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature)); 278 assert(result.is_null() || !result->is_static(), "static defaults not allowed"); 279 } 280 } 281 } 282 283 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass, 284 methodHandle resolved_method) { 285 286 int vtable_index = Method::invalid_vtable_index; 287 Symbol* name = resolved_method->name(); 288 Symbol* signature = resolved_method->signature(); 289 290 // First check in default method array 291 if (!resolved_method->is_abstract() && 292 (InstanceKlass::cast(klass())->default_methods() != NULL)) { 293 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature); 294 if (index >= 0 ) { 295 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index); 296 } 297 } 298 if (vtable_index == Method::invalid_vtable_index) { 299 // get vtable_index for miranda methods 300 ResourceMark rm; 301 klassVtable *vt = InstanceKlass::cast(klass())->vtable(); 302 vtable_index = vt->index_of_miranda(name, signature); 303 } 304 return vtable_index; 305 } 306 307 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 308 InstanceKlass *ik = InstanceKlass::cast(klass()); 309 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); 310 } 311 312 void LinkResolver::lookup_polymorphic_method(methodHandle& result, 313 KlassHandle klass, Symbol* name, Symbol* full_signature, 314 KlassHandle current_klass, 315 Handle *appendix_result_or_null, 316 Handle *method_type_result, 317 TRAPS) { 318 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); 319 if (TraceMethodHandles) { 320 ResourceMark rm(THREAD); 321 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", 322 vmIntrinsics::name_at(iid), klass->external_name(), 323 name->as_C_string(), full_signature->as_C_string()); 324 } 325 if (EnableInvokeDynamic && 326 klass() == SystemDictionary::MethodHandle_klass() && 327 iid != vmIntrinsics::_none) { 328 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { 329 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. 330 // Do not erase last argument type (MemberName) if it is a static linkTo method. 331 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); 332 TempNewSymbol basic_signature = 333 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); 334 if (TraceMethodHandles) { 335 ResourceMark rm(THREAD); 336 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", 337 name->as_C_string(), 338 full_signature->as_C_string(), 339 basic_signature->as_C_string()); 340 } 341 result = SystemDictionary::find_method_handle_intrinsic(iid, 342 basic_signature, 343 CHECK); 344 if (result.not_null()) { 345 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); 346 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); 347 assert(basic_signature == result->signature(), "predict the result signature"); 348 if (TraceMethodHandles) { 349 tty->print("lookup_polymorphic_method => intrinsic "); 350 result->print_on(tty); 351 } 352 return; 353 } 354 } else if (iid == vmIntrinsics::_invokeGeneric 355 && !THREAD->is_Compiler_thread() 356 && appendix_result_or_null != NULL) { 357 // This is a method with type-checking semantics. 358 // We will ask Java code to spin an adapter method for it. 359 if (!MethodHandles::enabled()) { 360 // Make sure the Java part of the runtime has been booted up. 361 Klass* natives = SystemDictionary::MethodHandleNatives_klass(); 362 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) { 363 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 364 Handle(), 365 Handle(), 366 true, 367 CHECK); 368 } 369 } 370 371 Handle appendix; 372 Handle method_type; 373 result = SystemDictionary::find_method_handle_invoker(name, 374 full_signature, 375 current_klass, 376 &appendix, 377 &method_type, 378 CHECK); 379 if (TraceMethodHandles) { 380 tty->print("lookup_polymorphic_method => (via Java) "); 381 result->print_on(tty); 382 tty->print(" lookup_polymorphic_method => appendix = "); 383 if (appendix.is_null()) tty->print_cr("(none)"); 384 else appendix->print_on(tty); 385 } 386 if (result.not_null()) { 387 #ifdef ASSERT 388 ResourceMark rm(THREAD); 389 390 TempNewSymbol basic_signature = 391 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); 392 int actual_size_of_params = result->size_of_parameters(); 393 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); 394 // +1 for MethodHandle.this, +1 for trailing MethodType 395 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; 396 if (appendix.not_null()) expected_size_of_params += 1; 397 if (actual_size_of_params != expected_size_of_params) { 398 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); 399 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); 400 result->print(); 401 } 402 assert(actual_size_of_params == expected_size_of_params, 403 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); 404 #endif //ASSERT 405 406 assert(appendix_result_or_null != NULL, ""); 407 (*appendix_result_or_null) = appendix; 408 (*method_type_result) = method_type; 409 return; 410 } 411 } 412 } 413 } 414 415 void LinkResolver::check_method_accessability(KlassHandle ref_klass, 416 KlassHandle resolved_klass, 417 KlassHandle sel_klass, 418 methodHandle sel_method, 419 TRAPS) { 420 421 AccessFlags flags = sel_method->access_flags(); 422 423 // Special case #1: arrays always override "clone". JVMS 2.15. 424 // If the resolved klass is an array class, and the declaring class 425 // is java.lang.Object and the method is "clone", set the flags 426 // to public. 427 // Special case #2: If the resolved klass is an interface, and 428 // the declaring class is java.lang.Object, and the method is 429 // "clone" or "finalize", set the flags to public. If the 430 // resolved interface does not contain "clone" or "finalize" 431 // methods, the method/interface method resolution looks to 432 // the interface's super class, java.lang.Object. With JDK 8 433 // interface accessability check requirement, special casing 434 // this scenario is necessary to avoid an IAE. 435 // 436 // We'll check for each method name first and then java.lang.Object 437 // to best short-circuit out of these tests. 438 if (((sel_method->name() == vmSymbols::clone_name() && 439 (resolved_klass->oop_is_array() || resolved_klass->is_interface())) || 440 (sel_method->name() == vmSymbols::finalize_method_name() && 441 resolved_klass->is_interface())) && 442 sel_klass() == SystemDictionary::Object_klass()) { 443 // We need to change "protected" to "public". 444 assert(flags.is_protected(), "clone or finalize not protected?"); 445 jint new_flags = flags.as_int(); 446 new_flags = new_flags & (~JVM_ACC_PROTECTED); 447 new_flags = new_flags | JVM_ACC_PUBLIC; 448 flags.set_flags(new_flags); 449 } 450 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); 451 452 if (!Reflection::verify_field_access(ref_klass(), 453 resolved_klass(), 454 sel_klass(), 455 flags, 456 true)) { 457 ResourceMark rm(THREAD); 458 Exceptions::fthrow( 459 THREAD_AND_LOCATION, 460 vmSymbols::java_lang_IllegalAccessError(), 461 "tried to access method %s.%s%s from class %s", 462 sel_klass->external_name(), 463 sel_method->name()->as_C_string(), 464 sel_method->signature()->as_C_string(), 465 ref_klass->external_name() 466 ); 467 return; 468 } 469 } 470 471 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, 472 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { 473 // This method is used only 474 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call), 475 // and 476 // (2) in Bytecode_invoke::static_target 477 // It appears to fail when applied to an invokeinterface call site. 478 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points. 479 // resolve klass 480 if (code == Bytecodes::_invokedynamic) { 481 resolved_klass = SystemDictionary::MethodHandle_klass(); 482 Symbol* method_name = vmSymbols::invoke_name(); 483 Symbol* method_signature = pool->signature_ref_at(index); 484 KlassHandle current_klass(THREAD, pool->pool_holder()); 485 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 486 return; 487 } 488 489 resolve_klass(resolved_klass, pool, index, CHECK); 490 491 Symbol* method_name = pool->name_ref_at(index); 492 Symbol* method_signature = pool->signature_ref_at(index); 493 KlassHandle current_klass(THREAD, pool->pool_holder()); 494 495 if (pool->has_preresolution() 496 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && 497 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { 498 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index); 499 if (result_oop != NULL) { 500 resolved_method = methodHandle(THREAD, result_oop); 501 return; 502 } 503 } 504 505 if (code == Bytecodes::_invokeinterface) { 506 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 507 } else if (code == Bytecodes::_invokevirtual) { 508 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 509 } else { 510 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK); 511 } 512 } 513 514 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, 515 Symbol* method_name, Symbol* method_signature, 516 KlassHandle current_klass, bool check_access, 517 bool require_methodref, TRAPS) { 518 519 Handle nested_exception; 520 521 // 1. check if methodref required, that resolved_klass is not interfacemethodref 522 if (require_methodref && resolved_klass->is_interface()) { 523 ResourceMark rm(THREAD); 524 char buf[200]; 525 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", 526 resolved_klass()->external_name()); 527 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 528 } 529 530 // 2. lookup method in resolved klass and its super klasses 531 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 532 533 if (resolved_method.is_null()) { // not found in the class hierarchy 534 // 3. lookup method in all the interfaces implemented by the resolved klass 535 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 536 537 if (resolved_method.is_null()) { 538 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc 539 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, 540 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); 541 if (HAS_PENDING_EXCEPTION) { 542 nested_exception = Handle(THREAD, PENDING_EXCEPTION); 543 CLEAR_PENDING_EXCEPTION; 544 } 545 } 546 547 if (resolved_method.is_null()) { 548 // 4. method lookup failed 549 ResourceMark rm(THREAD); 550 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), 551 Method::name_and_sig_as_C_string(resolved_klass(), 552 method_name, 553 method_signature), 554 nested_exception); 555 } 556 } 557 558 // 5. check if method is concrete 559 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { 560 ResourceMark rm(THREAD); 561 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 562 Method::name_and_sig_as_C_string(resolved_klass(), 563 method_name, 564 method_signature)); 565 } 566 567 // 6. access checks, access checking may be turned off when calling from within the VM. 568 if (check_access) { 569 assert(current_klass.not_null() , "current_klass should not be null"); 570 571 // check if method can be accessed by the referring class 572 check_method_accessability(current_klass, 573 resolved_klass, 574 KlassHandle(THREAD, resolved_method->method_holder()), 575 resolved_method, 576 CHECK); 577 578 // check loader constraints 579 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 580 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 581 { 582 ResourceMark rm(THREAD); 583 Symbol* failed_type_symbol = 584 SystemDictionary::check_signature_loaders(method_signature, loader, 585 class_loader, true, CHECK); 586 if (failed_type_symbol != NULL) { 587 const char* msg = "loader constraint violation: when resolving method" 588 " \"%s\" the class loader (instance of %s) of the current class, %s," 589 " and the class loader (instance of %s) for the method's defining class, %s, have" 590 " different Class objects for the type %s used in the signature"; 591 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 592 const char* loader1 = SystemDictionary::loader_name(loader()); 593 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 594 const char* loader2 = SystemDictionary::loader_name(class_loader()); 595 char* target = InstanceKlass::cast(resolved_method->method_holder()) 596 ->name()->as_C_string(); 597 char* failed_type_name = failed_type_symbol->as_C_string(); 598 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 599 strlen(current) + strlen(loader2) + strlen(target) + 600 strlen(failed_type_name) + 1; 601 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 602 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 603 target, failed_type_name); 604 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 605 } 606 } 607 } 608 } 609 610 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 611 KlassHandle resolved_klass, 612 Symbol* method_name, 613 Symbol* method_signature, 614 KlassHandle current_klass, 615 bool check_access, TRAPS) { 616 617 // check if klass is interface 618 if (!resolved_klass->is_interface()) { 619 ResourceMark rm(THREAD); 620 char buf[200]; 621 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name()); 622 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 623 } 624 625 // lookup method in this interface or its super, java.lang.Object 626 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 627 628 if (resolved_method.is_null()) { 629 // lookup method in all the super-interfaces 630 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 631 if (resolved_method.is_null()) { 632 // no method found 633 ResourceMark rm(THREAD); 634 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 635 Method::name_and_sig_as_C_string(resolved_klass(), 636 method_name, 637 method_signature)); 638 } 639 } 640 641 if (check_access) { 642 // JDK8 adds non-public interface methods, and accessability check requirement 643 assert(current_klass.not_null() , "current_klass should not be null"); 644 645 // check if method can be accessed by the referring class 646 check_method_accessability(current_klass, 647 resolved_klass, 648 KlassHandle(THREAD, resolved_method->method_holder()), 649 resolved_method, 650 CHECK); 651 652 HandleMark hm(THREAD); 653 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 654 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader()); 655 { 656 ResourceMark rm(THREAD); 657 Symbol* failed_type_symbol = 658 SystemDictionary::check_signature_loaders(method_signature, loader, 659 class_loader, true, CHECK); 660 if (failed_type_symbol != NULL) { 661 const char* msg = "loader constraint violation: when resolving " 662 "interface method \"%s\" the class loader (instance of %s) of the " 663 "current class, %s, and the class loader (instance of %s) for " 664 "the method's defining class, %s, have different Class objects for the type %s " 665 "used in the signature"; 666 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature); 667 const char* loader1 = SystemDictionary::loader_name(loader()); 668 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string(); 669 const char* loader2 = SystemDictionary::loader_name(class_loader()); 670 char* target = InstanceKlass::cast(resolved_method->method_holder()) 671 ->name()->as_C_string(); 672 char* failed_type_name = failed_type_symbol->as_C_string(); 673 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 674 strlen(current) + strlen(loader2) + strlen(target) + 675 strlen(failed_type_name) + 1; 676 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 677 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 678 target, failed_type_name); 679 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 680 } 681 } 682 } 683 684 if (TraceItables && Verbose) { 685 ResourceMark rm(THREAD); 686 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 687 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 688 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 689 Method::name_and_sig_as_C_string(resolved_klass(), 690 resolved_method->name(), 691 resolved_method->signature()), 692 resolved_method->method_holder()->internal_name() 693 ); 694 resolved_method->access_flags().print_on(tty); 695 if (resolved_method->is_default_method()) { 696 tty->print("default "); 697 } 698 if (resolved_method->is_overpass()) { 699 tty->print("overpass"); 700 } 701 tty->cr(); 702 } 703 } 704 705 //------------------------------------------------------------------------------------------------------------------------ 706 // Field resolution 707 708 void LinkResolver::check_field_accessability(KlassHandle ref_klass, 709 KlassHandle resolved_klass, 710 KlassHandle sel_klass, 711 fieldDescriptor& fd, 712 TRAPS) { 713 if (!Reflection::verify_field_access(ref_klass(), 714 resolved_klass(), 715 sel_klass(), 716 fd.access_flags(), 717 true)) { 718 ResourceMark rm(THREAD); 719 Exceptions::fthrow( 720 THREAD_AND_LOCATION, 721 vmSymbols::java_lang_IllegalAccessError(), 722 "tried to access field %s.%s from class %s", 723 sel_klass->external_name(), 724 fd.name()->as_C_string(), 725 ref_klass->external_name() 726 ); 727 return; 728 } 729 } 730 731 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 732 // Load these early in case the resolve of the containing klass fails 733 Symbol* field = pool->name_ref_at(index); 734 Symbol* sig = pool->signature_ref_at(index); 735 736 // resolve specified klass 737 KlassHandle resolved_klass; 738 resolve_klass(resolved_klass, pool, index, CHECK); 739 740 KlassHandle current_klass(THREAD, pool->pool_holder()); 741 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK); 742 } 743 744 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig, 745 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class, 746 TRAPS) { 747 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 748 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield || 749 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode"); 750 751 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 752 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); 753 754 // Check if there's a resolved klass containing the field 755 if (resolved_klass.is_null()) { 756 ResourceMark rm(THREAD); 757 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 758 } 759 760 // Resolve instance field 761 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); 762 // check if field exists; i.e., if a klass containing the field def has been selected 763 if (sel_klass.is_null()) { 764 ResourceMark rm(THREAD); 765 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 766 } 767 768 if (!check_access) 769 // Access checking may be turned off when calling from within the VM. 770 return; 771 772 // check access 773 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK); 774 775 // check for errors 776 if (is_static != fd.is_static()) { 777 ResourceMark rm(THREAD); 778 char msg[200]; 779 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string()); 780 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 781 } 782 783 // Final fields can only be accessed from its own class. 784 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) { 785 THROW(vmSymbols::java_lang_IllegalAccessError()); 786 } 787 788 // initialize resolved_klass if necessary 789 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 790 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 791 // 792 // note 2: we don't want to force initialization if we are just checking 793 // if the field access is legal; e.g., during compilation 794 if (is_static && initialize_class) { 795 sel_klass->initialize(CHECK); 796 } 797 798 if (sel_klass() != current_klass()) { 799 HandleMark hm(THREAD); 800 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader()); 801 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader()); 802 { 803 ResourceMark rm(THREAD); 804 Symbol* failed_type_symbol = 805 SystemDictionary::check_signature_loaders(sig, 806 ref_loader, sel_loader, 807 false, 808 CHECK); 809 if (failed_type_symbol != NULL) { 810 const char* msg = "loader constraint violation: when resolving field" 811 " \"%s\" the class loader (instance of %s) of the referring class, " 812 "%s, and the class loader (instance of %s) for the field's resolved " 813 "type, %s, have different Class objects for that type"; 814 char* field_name = field->as_C_string(); 815 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 816 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string(); 817 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 818 char* failed_type_name = failed_type_symbol->as_C_string(); 819 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 820 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1; 821 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 822 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 823 failed_type_name); 824 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 825 } 826 } 827 } 828 829 // return information. note that the klass is set to the actual klass containing the 830 // field, otherwise access of static fields in superclasses will not work. 831 } 832 833 834 //------------------------------------------------------------------------------------------------------------------------ 835 // Invoke resolution 836 // 837 // Naming conventions: 838 // 839 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 840 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 841 // resolved_klass the specified klass (i.e., specified via constant pool index) 842 // recv_klass the receiver klass 843 844 845 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 846 Symbol* method_signature, KlassHandle current_klass, 847 bool check_access, bool initialize_class, TRAPS) { 848 methodHandle resolved_method; 849 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 850 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder()); 851 852 // Initialize klass (this should only happen if everything is ok) 853 if (initialize_class && resolved_klass->should_be_initialized()) { 854 resolved_klass->initialize(CHECK); 855 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 856 } 857 858 // setup result 859 result.set_static(resolved_klass, resolved_method, CHECK); 860 } 861 862 // throws linktime exceptions 863 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 864 Symbol* method_name, Symbol* method_signature, 865 KlassHandle current_klass, bool check_access, TRAPS) { 866 867 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 868 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 869 870 // check if static 871 if (!resolved_method->is_static()) { 872 ResourceMark rm(THREAD); 873 char buf[200]; 874 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 875 resolved_method->name(), 876 resolved_method->signature())); 877 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 878 } 879 } 880 881 882 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 883 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 884 methodHandle resolved_method; 885 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 886 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 887 } 888 889 // throws linktime exceptions 890 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 891 Symbol* method_name, Symbol* method_signature, 892 KlassHandle current_klass, bool check_access, TRAPS) { 893 894 // Invokespecial is called for multiple special reasons: 895 // <init> 896 // local private method invocation, for classes and interfaces 897 // superclass.method, which can also resolve to a default method 898 // and the selected method is recalculated relative to the direct superclass 899 // superinterface.method, which explicitly does not check shadowing 900 901 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK); 902 903 // check if method name is <init>, that it is found in same klass as static type 904 if (resolved_method->name() == vmSymbols::object_initializer_name() && 905 resolved_method->method_holder() != resolved_klass()) { 906 ResourceMark rm(THREAD); 907 Exceptions::fthrow( 908 THREAD_AND_LOCATION, 909 vmSymbols::java_lang_NoSuchMethodError(), 910 "%s: method %s%s not found", 911 resolved_klass->external_name(), 912 resolved_method->name()->as_C_string(), 913 resolved_method->signature()->as_C_string() 914 ); 915 return; 916 } 917 918 // check if not static 919 if (resolved_method->is_static()) { 920 ResourceMark rm(THREAD); 921 char buf[200]; 922 jio_snprintf(buf, sizeof(buf), 923 "Expecting non-static method %s", 924 Method::name_and_sig_as_C_string(resolved_klass(), 925 resolved_method->name(), 926 resolved_method->signature())); 927 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 928 } 929 930 if (TraceItables && Verbose) { 931 ResourceMark rm(THREAD); 932 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 933 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 934 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 935 Method::name_and_sig_as_C_string(resolved_klass(), 936 resolved_method->name(), 937 resolved_method->signature()), 938 resolved_method->method_holder()->internal_name() 939 ); 940 resolved_method->access_flags().print_on(tty); 941 if (resolved_method->is_default_method()) { 942 tty->print("default "); 943 } 944 if (resolved_method->is_overpass()) { 945 tty->print("overpass"); 946 } 947 tty->cr(); 948 } 949 } 950 951 // throws runtime exceptions 952 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 953 KlassHandle current_klass, bool check_access, TRAPS) { 954 955 // resolved method is selected method unless we have an old-style lookup 956 // for a superclass method 957 // Invokespecial for a superinterface, resolved method is selected method, 958 // no checks for shadowing 959 methodHandle sel_method(THREAD, resolved_method()); 960 961 // check if this is an old-style super call and do a new lookup if so 962 { KlassHandle method_klass = KlassHandle(THREAD, 963 resolved_method->method_holder()); 964 965 if (check_access && 966 // a) check if ACC_SUPER flag is set for the current class 967 (current_klass->is_super() || !AllowNonVirtualCalls) && 968 // b) check if the class of the resolved_klass is a superclass 969 // (not supertype in order to exclude interface classes) of the current class. 970 // This check is not performed for super.invoke for interface methods 971 // in super interfaces. 972 current_klass->is_subclass_of(resolved_klass()) && 973 current_klass() != resolved_klass() && 974 // c) check if the method is not <init> 975 resolved_method->name() != vmSymbols::object_initializer_name()) { 976 // Lookup super method 977 KlassHandle super_klass(THREAD, current_klass->super()); 978 lookup_instance_method_in_klasses(sel_method, super_klass, 979 resolved_method->name(), 980 resolved_method->signature(), CHECK); 981 // check if found 982 if (sel_method.is_null()) { 983 ResourceMark rm(THREAD); 984 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 985 Method::name_and_sig_as_C_string(resolved_klass(), 986 resolved_method->name(), 987 resolved_method->signature())); 988 } 989 } 990 } 991 992 // check if not static 993 if (sel_method->is_static()) { 994 ResourceMark rm(THREAD); 995 char buf[200]; 996 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 997 resolved_method->name(), 998 resolved_method->signature())); 999 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1000 } 1001 1002 // check if abstract 1003 if (sel_method->is_abstract()) { 1004 ResourceMark rm(THREAD); 1005 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1006 Method::name_and_sig_as_C_string(resolved_klass(), 1007 sel_method->name(), 1008 sel_method->signature())); 1009 } 1010 1011 if (TraceItables && Verbose) { 1012 ResourceMark rm(THREAD); 1013 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1014 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1015 Method::name_and_sig_as_C_string(resolved_klass(), 1016 sel_method->name(), 1017 sel_method->signature()), 1018 sel_method->method_holder()->internal_name() 1019 ); 1020 sel_method->access_flags().print_on(tty); 1021 if (sel_method->is_default_method()) { 1022 tty->print("default "); 1023 } 1024 if (sel_method->is_overpass()) { 1025 tty->print("overpass"); 1026 } 1027 tty->cr(); 1028 } 1029 1030 // setup result 1031 result.set_static(resolved_klass, sel_method, CHECK); 1032 } 1033 1034 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 1035 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1036 bool check_access, bool check_null_and_abstract, TRAPS) { 1037 methodHandle resolved_method; 1038 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1039 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 1040 } 1041 1042 // throws linktime exceptions 1043 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 1044 Symbol* method_name, Symbol* method_signature, 1045 KlassHandle current_klass, bool check_access, TRAPS) { 1046 // normal method resolution 1047 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK); 1048 1049 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1050 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1051 1052 // check if private interface method 1053 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1054 ResourceMark rm(THREAD); 1055 char buf[200]; 1056 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s", 1057 Method::name_and_sig_as_C_string(resolved_klass(), 1058 resolved_method->name(), 1059 resolved_method->signature()), 1060 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name())); 1061 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1062 } 1063 1064 // check if not static 1065 if (resolved_method->is_static()) { 1066 ResourceMark rm(THREAD); 1067 char buf[200]; 1068 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(), 1069 resolved_method->name(), 1070 resolved_method->signature())); 1071 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1072 } 1073 1074 if (PrintVtables && Verbose) { 1075 ResourceMark rm(THREAD); 1076 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ", 1077 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()), 1078 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1079 Method::name_and_sig_as_C_string(resolved_klass(), 1080 resolved_method->name(), 1081 resolved_method->signature()), 1082 resolved_method->method_holder()->internal_name() 1083 ); 1084 resolved_method->access_flags().print_on(tty); 1085 if (resolved_method->is_default_method()) { 1086 tty->print("default "); 1087 } 1088 if (resolved_method->is_overpass()) { 1089 tty->print("overpass"); 1090 } 1091 tty->cr(); 1092 } 1093 } 1094 1095 // throws runtime exceptions 1096 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 1097 methodHandle resolved_method, 1098 KlassHandle resolved_klass, 1099 Handle recv, 1100 KlassHandle recv_klass, 1101 bool check_null_and_abstract, 1102 TRAPS) { 1103 1104 // setup default return values 1105 int vtable_index = Method::invalid_vtable_index; 1106 methodHandle selected_method; 1107 1108 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 1109 1110 // runtime method resolution 1111 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 1112 THROW(vmSymbols::java_lang_NullPointerException()); 1113 } 1114 1115 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s 1116 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 1117 // a missing receiver might result in a bogus lookup. 1118 assert(resolved_method->method_holder()->is_linked(), "must be linked"); 1119 1120 // do lookup based on receiver klass using the vtable index 1121 if (resolved_method->method_holder()->is_interface()) { // miranda method 1122 vtable_index = vtable_index_of_interface_method(resolved_klass, 1123 resolved_method); 1124 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 1125 1126 InstanceKlass* inst = InstanceKlass::cast(recv_klass()); 1127 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1128 } else { 1129 // at this point we are sure that resolved_method is virtual and not 1130 // a miranda method; therefore, it must have a valid vtable index. 1131 assert(!resolved_method->has_itable_index(), ""); 1132 vtable_index = resolved_method->vtable_index(); 1133 // We could get a negative vtable_index for final methods, 1134 // because as an optimization they are they are never put in the vtable, 1135 // unless they override an existing method. 1136 // If we do get a negative, it means the resolved method is the the selected 1137 // method, and it can never be changed by an override. 1138 if (vtable_index == Method::nonvirtual_vtable_index) { 1139 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 1140 selected_method = resolved_method; 1141 } else { 1142 // recv_klass might be an arrayKlassOop but all vtables start at 1143 // the same place. The cast is to avoid virtual call and assertion. 1144 InstanceKlass* inst = (InstanceKlass*)recv_klass(); 1145 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 1146 } 1147 } 1148 1149 // check if method exists 1150 if (selected_method.is_null()) { 1151 ResourceMark rm(THREAD); 1152 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1153 Method::name_and_sig_as_C_string(resolved_klass(), 1154 resolved_method->name(), 1155 resolved_method->signature())); 1156 } 1157 1158 // check if abstract 1159 if (check_null_and_abstract && selected_method->is_abstract()) { 1160 ResourceMark rm(THREAD); 1161 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1162 Method::name_and_sig_as_C_string(resolved_klass(), 1163 selected_method->name(), 1164 selected_method->signature())); 1165 } 1166 1167 if (PrintVtables && Verbose) { 1168 ResourceMark rm(THREAD); 1169 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ", 1170 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1171 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1172 Method::name_and_sig_as_C_string(resolved_klass(), 1173 resolved_method->name(), 1174 resolved_method->signature()), 1175 selected_method->method_holder()->internal_name(), 1176 vtable_index 1177 ); 1178 selected_method->access_flags().print_on(tty); 1179 if (selected_method->is_default_method()) { 1180 tty->print("default "); 1181 } 1182 if (selected_method->is_overpass()) { 1183 tty->print("overpass"); 1184 } 1185 tty->cr(); 1186 } 1187 // setup result 1188 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 1189 } 1190 1191 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 1192 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 1193 bool check_access, bool check_null_and_abstract, TRAPS) { 1194 methodHandle resolved_method; 1195 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1196 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 1197 } 1198 1199 // throws linktime exceptions 1200 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 1201 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 1202 // normal interface method resolution 1203 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 1204 1205 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 1206 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 1207 } 1208 1209 // throws runtime exceptions 1210 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 1211 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 1212 // check if receiver exists 1213 if (check_null_and_abstract && recv.is_null()) { 1214 THROW(vmSymbols::java_lang_NullPointerException()); 1215 } 1216 1217 // check if private interface method 1218 if (resolved_klass->is_interface() && resolved_method->is_private()) { 1219 ResourceMark rm(THREAD); 1220 char buf[200]; 1221 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s", 1222 Method::name_and_sig_as_C_string(resolved_klass(), 1223 resolved_method->name(), 1224 resolved_method->signature())); 1225 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1226 } 1227 1228 // check if receiver klass implements the resolved interface 1229 if (!recv_klass->is_subtype_of(resolved_klass())) { 1230 ResourceMark rm(THREAD); 1231 char buf[200]; 1232 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 1233 recv_klass()->external_name(), 1234 resolved_klass()->external_name()); 1235 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 1236 } 1237 // do lookup based on receiver klass 1238 methodHandle sel_method; 1239 lookup_instance_method_in_klasses(sel_method, recv_klass, 1240 resolved_method->name(), 1241 resolved_method->signature(), CHECK); 1242 if (sel_method.is_null() && !check_null_and_abstract) { 1243 // In theory this is a harmless placeholder value, but 1244 // in practice leaving in null affects the nsk default method tests. 1245 // This needs further study. 1246 sel_method = resolved_method; 1247 } 1248 // check if method exists 1249 if (sel_method.is_null()) { 1250 ResourceMark rm(THREAD); 1251 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1252 Method::name_and_sig_as_C_string(recv_klass(), 1253 resolved_method->name(), 1254 resolved_method->signature())); 1255 } 1256 // check access 1257 // Throw Illegal Access Error if sel_method is not public. 1258 if (!sel_method->is_public()) { 1259 ResourceMark rm(THREAD); 1260 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 1261 Method::name_and_sig_as_C_string(recv_klass(), 1262 sel_method->name(), 1263 sel_method->signature())); 1264 } 1265 // check if abstract 1266 if (check_null_and_abstract && sel_method->is_abstract()) { 1267 ResourceMark rm(THREAD); 1268 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1269 Method::name_and_sig_as_C_string(recv_klass(), 1270 sel_method->name(), 1271 sel_method->signature())); 1272 } 1273 1274 if (TraceItables && Verbose) { 1275 ResourceMark rm(THREAD); 1276 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ", 1277 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()), 1278 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()), 1279 Method::name_and_sig_as_C_string(resolved_klass(), 1280 resolved_method->name(), 1281 resolved_method->signature()), 1282 sel_method->method_holder()->internal_name() 1283 ); 1284 sel_method->access_flags().print_on(tty); 1285 if (sel_method->is_default_method()) { 1286 tty->print("default "); 1287 } 1288 if (sel_method->is_overpass()) { 1289 tty->print("overpass"); 1290 } 1291 tty->cr(); 1292 } 1293 // setup result 1294 if (!resolved_method->has_itable_index()) { 1295 int vtable_index = resolved_method->vtable_index(); 1296 assert(vtable_index == sel_method->vtable_index(), "sanity check"); 1297 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK); 1298 } else { 1299 int itable_index = resolved_method()->itable_index(); 1300 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK); 1301 } 1302 } 1303 1304 1305 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1306 KlassHandle resolved_klass, 1307 Symbol* method_name, 1308 Symbol* method_signature, 1309 KlassHandle current_klass, 1310 bool check_access) { 1311 EXCEPTION_MARK; 1312 methodHandle method_result; 1313 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1314 if (HAS_PENDING_EXCEPTION) { 1315 CLEAR_PENDING_EXCEPTION; 1316 return methodHandle(); 1317 } else { 1318 return method_result; 1319 } 1320 } 1321 1322 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1323 KlassHandle resolved_klass, 1324 Symbol* method_name, 1325 Symbol* method_signature, 1326 KlassHandle current_klass, 1327 bool check_access) { 1328 EXCEPTION_MARK; 1329 methodHandle method_result; 1330 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1331 if (HAS_PENDING_EXCEPTION) { 1332 CLEAR_PENDING_EXCEPTION; 1333 return methodHandle(); 1334 } else { 1335 return method_result; 1336 } 1337 } 1338 1339 methodHandle LinkResolver::resolve_virtual_call_or_null( 1340 KlassHandle receiver_klass, 1341 KlassHandle resolved_klass, 1342 Symbol* name, 1343 Symbol* signature, 1344 KlassHandle current_klass) { 1345 EXCEPTION_MARK; 1346 CallInfo info; 1347 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1348 if (HAS_PENDING_EXCEPTION) { 1349 CLEAR_PENDING_EXCEPTION; 1350 return methodHandle(); 1351 } 1352 return info.selected_method(); 1353 } 1354 1355 methodHandle LinkResolver::resolve_interface_call_or_null( 1356 KlassHandle receiver_klass, 1357 KlassHandle resolved_klass, 1358 Symbol* name, 1359 Symbol* signature, 1360 KlassHandle current_klass) { 1361 EXCEPTION_MARK; 1362 CallInfo info; 1363 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1364 if (HAS_PENDING_EXCEPTION) { 1365 CLEAR_PENDING_EXCEPTION; 1366 return methodHandle(); 1367 } 1368 return info.selected_method(); 1369 } 1370 1371 int LinkResolver::resolve_virtual_vtable_index( 1372 KlassHandle receiver_klass, 1373 KlassHandle resolved_klass, 1374 Symbol* name, 1375 Symbol* signature, 1376 KlassHandle current_klass) { 1377 EXCEPTION_MARK; 1378 CallInfo info; 1379 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1380 if (HAS_PENDING_EXCEPTION) { 1381 CLEAR_PENDING_EXCEPTION; 1382 return Method::invalid_vtable_index; 1383 } 1384 return info.vtable_index(); 1385 } 1386 1387 methodHandle LinkResolver::resolve_static_call_or_null( 1388 KlassHandle resolved_klass, 1389 Symbol* name, 1390 Symbol* signature, 1391 KlassHandle current_klass) { 1392 EXCEPTION_MARK; 1393 CallInfo info; 1394 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); 1395 if (HAS_PENDING_EXCEPTION) { 1396 CLEAR_PENDING_EXCEPTION; 1397 return methodHandle(); 1398 } 1399 return info.selected_method(); 1400 } 1401 1402 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, 1403 KlassHandle current_klass) { 1404 EXCEPTION_MARK; 1405 CallInfo info; 1406 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); 1407 if (HAS_PENDING_EXCEPTION) { 1408 CLEAR_PENDING_EXCEPTION; 1409 return methodHandle(); 1410 } 1411 return info.selected_method(); 1412 } 1413 1414 1415 1416 //------------------------------------------------------------------------------------------------------------------------ 1417 // ConstantPool entries 1418 1419 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1420 switch (byte) { 1421 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1422 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1423 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1424 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1425 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1426 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1427 } 1428 return; 1429 } 1430 1431 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1432 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1433 // resolve klass 1434 resolve_klass(resolved_klass, pool, index, CHECK); 1435 1436 // Get name, signature, and static klass 1437 method_name = pool->name_ref_at(index); 1438 method_signature = pool->signature_ref_at(index); 1439 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1440 } 1441 1442 1443 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1444 KlassHandle resolved_klass; 1445 Symbol* method_name = NULL; 1446 Symbol* method_signature = NULL; 1447 KlassHandle current_klass; 1448 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1449 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1450 } 1451 1452 1453 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1454 KlassHandle resolved_klass; 1455 Symbol* method_name = NULL; 1456 Symbol* method_signature = NULL; 1457 KlassHandle current_klass; 1458 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1459 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1460 } 1461 1462 1463 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1464 constantPoolHandle pool, int index, 1465 TRAPS) { 1466 1467 KlassHandle resolved_klass; 1468 Symbol* method_name = NULL; 1469 Symbol* method_signature = NULL; 1470 KlassHandle current_klass; 1471 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1472 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1473 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1474 } 1475 1476 1477 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1478 KlassHandle resolved_klass; 1479 Symbol* method_name = NULL; 1480 Symbol* method_signature = NULL; 1481 KlassHandle current_klass; 1482 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1483 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass()); 1484 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1485 } 1486 1487 1488 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1489 assert(EnableInvokeDynamic, ""); 1490 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1491 KlassHandle resolved_klass; 1492 Symbol* method_name = NULL; 1493 Symbol* method_signature = NULL; 1494 KlassHandle current_klass; 1495 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1496 if (TraceMethodHandles) { 1497 ResourceMark rm(THREAD); 1498 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); 1499 } 1500 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); 1501 } 1502 1503 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, 1504 Symbol* method_name, Symbol* method_signature, 1505 KlassHandle current_klass, 1506 TRAPS) { 1507 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1508 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); 1509 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); 1510 methodHandle resolved_method; 1511 Handle resolved_appendix; 1512 Handle resolved_method_type; 1513 lookup_polymorphic_method(resolved_method, resolved_klass, 1514 method_name, method_signature, 1515 current_klass, &resolved_appendix, &resolved_method_type, CHECK); 1516 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1517 } 1518 1519 1520 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1521 assert(EnableInvokeDynamic, ""); 1522 1523 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); 1524 Symbol* method_name = pool->name_ref_at(index); 1525 Symbol* method_signature = pool->signature_ref_at(index); 1526 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); 1527 1528 // Resolve the bootstrap specifier (BSM + optional arguments). 1529 Handle bootstrap_specifier; 1530 // Check if CallSite has been bound already: 1531 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index); 1532 if (cpce->is_f1_null()) { 1533 int pool_index = cpce->constant_pool_index(); 1534 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); 1535 assert(bsm_info != NULL, ""); 1536 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1537 bootstrap_specifier = Handle(THREAD, bsm_info); 1538 } 1539 if (!cpce->is_f1_null()) { 1540 methodHandle method( THREAD, cpce->f1_as_method()); 1541 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1542 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1543 result.set_handle(method, appendix, method_type, CHECK); 1544 return; 1545 } 1546 1547 if (TraceMethodHandles) { 1548 ResourceMark rm(THREAD); 1549 tty->print_cr("resolve_invokedynamic #%d %s %s", 1550 ConstantPool::decode_invokedynamic_index(index), 1551 method_name->as_C_string(), method_signature->as_C_string()); 1552 tty->print(" BSM info: "); bootstrap_specifier->print(); 1553 } 1554 1555 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); 1556 } 1557 1558 void LinkResolver::resolve_dynamic_call(CallInfo& result, 1559 Handle bootstrap_specifier, 1560 Symbol* method_name, Symbol* method_signature, 1561 KlassHandle current_klass, 1562 TRAPS) { 1563 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1564 // The appendix argument is likely to be a freshly-created CallSite. 1565 Handle resolved_appendix; 1566 Handle resolved_method_type; 1567 methodHandle resolved_method = 1568 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1569 bootstrap_specifier, 1570 method_name, method_signature, 1571 &resolved_appendix, 1572 &resolved_method_type, 1573 THREAD); 1574 if (HAS_PENDING_EXCEPTION) { 1575 if (TraceMethodHandles) { 1576 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION); 1577 PENDING_EXCEPTION->print(); 1578 } 1579 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1580 // throw these guys, since they are already wrapped 1581 return; 1582 } 1583 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1584 // intercept only LinkageErrors which might have failed to wrap 1585 return; 1586 } 1587 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1588 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1589 CLEAR_PENDING_EXCEPTION; 1590 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1591 } 1592 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1593 } 1594 1595 //------------------------------------------------------------------------------------------------------------------------ 1596 #ifndef PRODUCT 1597 1598 void CallInfo::print() { 1599 ResourceMark rm; 1600 const char* kindstr = "unknown"; 1601 switch (_call_kind) { 1602 case direct_call: kindstr = "direct"; break; 1603 case vtable_call: kindstr = "vtable"; break; 1604 case itable_call: kindstr = "itable"; break; 1605 } 1606 tty->print_cr("Call %s@%d %s", kindstr, _call_index, 1607 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string()); 1608 } 1609 1610 #endif