1 /* 2 * Copyright (c) 1997, 2011, 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/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "gc_interface/collectedHeap.inline.hpp" 30 #include "interpreter/bytecode.hpp" 31 #include "interpreter/interpreterRuntime.hpp" 32 #include "interpreter/linkResolver.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/instanceKlass.hpp" 36 #include "oops/objArrayOop.hpp" 37 #include "prims/methodHandles.hpp" 38 #include "prims/nativeLookup.hpp" 39 #include "runtime/compilationPolicy.hpp" 40 #include "runtime/fieldDescriptor.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/reflection.hpp" 44 #include "runtime/signature.hpp" 45 #include "runtime/vmThread.hpp" 46 #ifdef TARGET_OS_FAMILY_linux 47 # include "thread_linux.inline.hpp" 48 #endif 49 #ifdef TARGET_OS_FAMILY_solaris 50 # include "thread_solaris.inline.hpp" 51 #endif 52 #ifdef TARGET_OS_FAMILY_windows 53 # include "thread_windows.inline.hpp" 54 #endif 55 #ifdef TARGET_OS_FAMILY_bsd 56 # include "thread_bsd.inline.hpp" 57 #endif 58 59 //------------------------------------------------------------------------------------------------------------------------ 60 // Implementation of FieldAccessInfo 61 62 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset, 63 BasicType field_type, AccessFlags access_flags) { 64 _klass = klass; 65 _name = name; 66 _field_index = field_index; 67 _field_offset = field_offset; 68 _field_type = field_type; 69 _access_flags = access_flags; 70 } 71 72 73 //------------------------------------------------------------------------------------------------------------------------ 74 // Implementation of CallInfo 75 76 77 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) { 78 int vtable_index = methodOopDesc::nonvirtual_vtable_index; 79 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); 80 } 81 82 83 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) { 84 // This is only called for interface methods. If the resolved_method 85 // comes from java/lang/Object, it can be the subject of a virtual call, so 86 // we should pick the vtable index from the resolved method. 87 // Other than that case, there is no valid vtable index to specify. 88 int vtable_index = methodOopDesc::invalid_vtable_index; 89 if (resolved_method->method_holder() == SystemDictionary::Object_klass()) { 90 assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check"); 91 vtable_index = resolved_method->vtable_index(); 92 } 93 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); 94 } 95 96 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { 97 assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index"); 98 set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK); 99 } 100 101 void CallInfo::set_dynamic(methodHandle resolved_method, TRAPS) { 102 assert(resolved_method->is_method_handle_invoke(), ""); 103 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); 104 assert(resolved_klass == resolved_method->method_holder(), ""); 105 int vtable_index = methodOopDesc::nonvirtual_vtable_index; 106 assert(resolved_method->vtable_index() == vtable_index, ""); 107 set_common(resolved_klass, KlassHandle(), resolved_method, resolved_method, vtable_index, CHECK); 108 } 109 110 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { 111 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); 112 _resolved_klass = resolved_klass; 113 _selected_klass = selected_klass; 114 _resolved_method = resolved_method; 115 _selected_method = selected_method; 116 _vtable_index = vtable_index; 117 if (CompilationPolicy::must_be_compiled(selected_method)) { 118 // This path is unusual, mostly used by the '-Xcomp' stress test mode. 119 120 // Note: with several active threads, the must_be_compiled may be true 121 // while can_be_compiled is false; remove assert 122 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); 123 if (THREAD->is_Compiler_thread()) { 124 // don't force compilation, resolve was on behalf of compiler 125 return; 126 } 127 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) { 128 // 'is_not_initialized' means not only '!is_initialized', but also that 129 // initialization has not been started yet ('!being_initialized') 130 // Do not force compilation of methods in uninitialized classes. 131 // Note that doing this would throw an assert later, 132 // in CompileBroker::compile_method. 133 // We sometimes use the link resolver to do reflective lookups 134 // even before classes are initialized. 135 return; 136 } 137 CompileBroker::compile_method(selected_method, InvocationEntryBci, 138 CompilationPolicy::policy()->initial_compile_level(), 139 methodHandle(), 0, "must_be_compiled", CHECK); 140 } 141 } 142 143 144 //------------------------------------------------------------------------------------------------------------------------ 145 // Klass resolution 146 147 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { 148 if (!Reflection::verify_class_access(ref_klass->as_klassOop(), 149 sel_klass->as_klassOop(), 150 true)) { 151 ResourceMark rm(THREAD); 152 Exceptions::fthrow( 153 THREAD_AND_LOCATION, 154 vmSymbols::java_lang_IllegalAccessError(), 155 "tried to access class %s from class %s", 156 sel_klass->external_name(), 157 ref_klass->external_name() 158 ); 159 return; 160 } 161 } 162 163 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 164 klassOop result_oop = pool->klass_ref_at(index, CHECK); 165 result = KlassHandle(THREAD, result_oop); 166 } 167 168 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 169 klassOop result_oop = 170 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK); 171 result = KlassHandle(THREAD, result_oop); 172 } 173 174 175 //------------------------------------------------------------------------------------------------------------------------ 176 // Method resolution 177 // 178 // According to JVM spec. $5.4.3c & $5.4.3d 179 180 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 181 methodOop result_oop = klass->uncached_lookup_method(name, signature); 182 if (EnableInvokeDynamic && result_oop != NULL) { 183 switch (result_oop->intrinsic_id()) { 184 case vmIntrinsics::_invokeExact: 185 case vmIntrinsics::_invokeGeneric: 186 case vmIntrinsics::_invokeDynamic: 187 // Do not link directly to these. The VM must produce a synthetic one using lookup_implicit_method. 188 return; 189 } 190 } 191 result = methodHandle(THREAD, result_oop); 192 } 193 194 // returns first instance method 195 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 196 methodOop result_oop = klass->uncached_lookup_method(name, signature); 197 result = methodHandle(THREAD, result_oop); 198 while (!result.is_null() && result->is_static()) { 199 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); 200 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); 201 } 202 } 203 204 205 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 206 ResourceMark rm(THREAD); 207 klassVtable *vt = instanceKlass::cast(klass())->vtable(); 208 return vt->index_of_miranda(name, signature); 209 } 210 211 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 212 instanceKlass *ik = instanceKlass::cast(klass()); 213 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); 214 } 215 216 void LinkResolver::lookup_implicit_method(methodHandle& result, 217 KlassHandle klass, Symbol* name, Symbol* signature, 218 KlassHandle current_klass, 219 TRAPS) { 220 if (EnableInvokeDynamic && 221 klass() == SystemDictionary::MethodHandle_klass() && 222 methodOopDesc::is_method_handle_invoke_name(name)) { 223 if (!THREAD->is_Compiler_thread() && !MethodHandles::enabled()) { 224 // Make sure the Java part of the runtime has been booted up. 225 klassOop natives = SystemDictionary::MethodHandleNatives_klass(); 226 if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) { 227 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 228 Handle(), 229 Handle(), 230 true, 231 CHECK); 232 } 233 } 234 methodOop result_oop = SystemDictionary::find_method_handle_invoke(name, 235 signature, 236 current_klass, 237 CHECK); 238 if (result_oop != NULL) { 239 assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent"); 240 result = methodHandle(THREAD, result_oop); 241 } 242 } 243 } 244 245 void LinkResolver::check_method_accessability(KlassHandle ref_klass, 246 KlassHandle resolved_klass, 247 KlassHandle sel_klass, 248 methodHandle sel_method, 249 TRAPS) { 250 251 AccessFlags flags = sel_method->access_flags(); 252 253 // Special case: arrays always override "clone". JVMS 2.15. 254 // If the resolved klass is an array class, and the declaring class 255 // is java.lang.Object and the method is "clone", set the flags 256 // to public. 257 // 258 // We'll check for the method name first, as that's most likely 259 // to be false (so we'll short-circuit out of these tests). 260 if (sel_method->name() == vmSymbols::clone_name() && 261 sel_klass() == SystemDictionary::Object_klass() && 262 resolved_klass->oop_is_array()) { 263 // We need to change "protected" to "public". 264 assert(flags.is_protected(), "clone not protected?"); 265 jint new_flags = flags.as_int(); 266 new_flags = new_flags & (~JVM_ACC_PROTECTED); 267 new_flags = new_flags | JVM_ACC_PUBLIC; 268 flags.set_flags(new_flags); 269 } 270 271 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), 272 resolved_klass->as_klassOop(), 273 sel_klass->as_klassOop(), 274 flags, 275 true)) { 276 ResourceMark rm(THREAD); 277 Exceptions::fthrow( 278 THREAD_AND_LOCATION, 279 vmSymbols::java_lang_IllegalAccessError(), 280 "tried to access method %s.%s%s from class %s", 281 sel_klass->external_name(), 282 sel_method->name()->as_C_string(), 283 sel_method->signature()->as_C_string(), 284 ref_klass->external_name() 285 ); 286 return; 287 } 288 } 289 290 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass, 291 constantPoolHandle pool, int index, TRAPS) { 292 293 // resolve klass 294 resolve_klass(resolved_klass, pool, index, CHECK); 295 296 Symbol* method_name = pool->name_ref_at(index); 297 Symbol* method_signature = pool->signature_ref_at(index); 298 KlassHandle current_klass(THREAD, pool->pool_holder()); 299 300 if (pool->has_preresolution() 301 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && 302 methodOopDesc::is_method_handle_invoke_name(method_name))) { 303 methodOop result_oop = constantPoolOopDesc::method_at_if_loaded(pool, index); 304 if (result_oop != NULL) { 305 resolved_method = methodHandle(THREAD, result_oop); 306 return; 307 } 308 } 309 310 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 311 } 312 313 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { 314 // The class is java.lang.invoke.MethodHandle 315 resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); 316 317 Symbol* method_name = vmSymbols::invokeExact_name(); 318 319 Symbol* method_signature = pool->signature_ref_at(index); 320 KlassHandle current_klass (THREAD, pool->pool_holder()); 321 322 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 323 } 324 325 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) { 326 327 // resolve klass 328 resolve_klass(resolved_klass, pool, index, CHECK); 329 Symbol* method_name = pool->name_ref_at(index); 330 Symbol* method_signature = pool->signature_ref_at(index); 331 KlassHandle current_klass(THREAD, pool->pool_holder()); 332 333 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 334 } 335 336 337 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, 338 Symbol* method_name, Symbol* method_signature, 339 KlassHandle current_klass, bool check_access, TRAPS) { 340 341 // 1. check if klass is not interface 342 if (resolved_klass->is_interface()) { 343 ResourceMark rm(THREAD); 344 char buf[200]; 345 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); 346 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 347 } 348 349 // 2. lookup method in resolved klass and its super klasses 350 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 351 352 if (resolved_method.is_null()) { // not found in the class hierarchy 353 // 3. lookup method in all the interfaces implemented by the resolved klass 354 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 355 356 if (resolved_method.is_null()) { 357 // JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...) 358 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK); 359 } 360 361 if (resolved_method.is_null()) { 362 // 4. method lookup failed 363 ResourceMark rm(THREAD); 364 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 365 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 366 method_name, 367 method_signature)); 368 } 369 } 370 371 // 5. check if method is concrete 372 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { 373 ResourceMark rm(THREAD); 374 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 375 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 376 method_name, 377 method_signature)); 378 } 379 380 // 6. access checks, access checking may be turned off when calling from within the VM. 381 if (check_access) { 382 assert(current_klass.not_null() , "current_klass should not be null"); 383 384 // check if method can be accessed by the referring class 385 check_method_accessability(current_klass, 386 resolved_klass, 387 KlassHandle(THREAD, resolved_method->method_holder()), 388 resolved_method, 389 CHECK); 390 391 // check loader constraints 392 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); 393 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); 394 { 395 ResourceMark rm(THREAD); 396 char* failed_type_name = 397 SystemDictionary::check_signature_loaders(method_signature, loader, 398 class_loader, true, CHECK); 399 if (failed_type_name != NULL) { 400 const char* msg = "loader constraint violation: when resolving method" 401 " \"%s\" the class loader (instance of %s) of the current class, %s," 402 " and the class loader (instance of %s) for resolved class, %s, have" 403 " different Class objects for the type %s used in the signature"; 404 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); 405 const char* loader1 = SystemDictionary::loader_name(loader()); 406 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); 407 const char* loader2 = SystemDictionary::loader_name(class_loader()); 408 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); 409 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 410 strlen(current) + strlen(loader2) + strlen(resolved) + 411 strlen(failed_type_name); 412 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 413 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 414 resolved, failed_type_name); 415 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 416 } 417 } 418 } 419 } 420 421 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 422 KlassHandle resolved_klass, 423 Symbol* method_name, 424 Symbol* method_signature, 425 KlassHandle current_klass, 426 bool check_access, TRAPS) { 427 428 // check if klass is interface 429 if (!resolved_klass->is_interface()) { 430 ResourceMark rm(THREAD); 431 char buf[200]; 432 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); 433 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 434 } 435 436 // lookup method in this interface or its super, java.lang.Object 437 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 438 439 if (resolved_method.is_null()) { 440 // lookup method in all the super-interfaces 441 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 442 if (resolved_method.is_null()) { 443 // no method found 444 ResourceMark rm(THREAD); 445 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 446 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 447 method_name, 448 method_signature)); 449 } 450 } 451 452 if (check_access) { 453 HandleMark hm(THREAD); 454 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); 455 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); 456 { 457 ResourceMark rm(THREAD); 458 char* failed_type_name = 459 SystemDictionary::check_signature_loaders(method_signature, loader, 460 class_loader, true, CHECK); 461 if (failed_type_name != NULL) { 462 const char* msg = "loader constraint violation: when resolving " 463 "interface method \"%s\" the class loader (instance of %s) of the " 464 "current class, %s, and the class loader (instance of %s) for " 465 "resolved class, %s, have different Class objects for the type %s " 466 "used in the signature"; 467 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); 468 const char* loader1 = SystemDictionary::loader_name(loader()); 469 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); 470 const char* loader2 = SystemDictionary::loader_name(class_loader()); 471 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); 472 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 473 strlen(current) + strlen(loader2) + strlen(resolved) + 474 strlen(failed_type_name); 475 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 476 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 477 resolved, failed_type_name); 478 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 479 } 480 } 481 } 482 } 483 484 //------------------------------------------------------------------------------------------------------------------------ 485 // Field resolution 486 487 void LinkResolver::check_field_accessability(KlassHandle ref_klass, 488 KlassHandle resolved_klass, 489 KlassHandle sel_klass, 490 fieldDescriptor& fd, 491 TRAPS) { 492 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), 493 resolved_klass->as_klassOop(), 494 sel_klass->as_klassOop(), 495 fd.access_flags(), 496 true)) { 497 ResourceMark rm(THREAD); 498 Exceptions::fthrow( 499 THREAD_AND_LOCATION, 500 vmSymbols::java_lang_IllegalAccessError(), 501 "tried to access field %s.%s from class %s", 502 sel_klass->external_name(), 503 fd.name()->as_C_string(), 504 ref_klass->external_name() 505 ); 506 return; 507 } 508 } 509 510 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { 511 resolve_field(result, pool, index, byte, check_only, true, CHECK); 512 } 513 514 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { 515 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 516 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); 517 518 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 519 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); 520 521 // resolve specified klass 522 KlassHandle resolved_klass; 523 if (update_pool) { 524 resolve_klass(resolved_klass, pool, index, CHECK); 525 } else { 526 resolve_klass_no_update(resolved_klass, pool, index, CHECK); 527 } 528 // Load these early in case the resolve of the containing klass fails 529 Symbol* field = pool->name_ref_at(index); 530 Symbol* sig = pool->signature_ref_at(index); 531 // Check if there's a resolved klass containing the field 532 if( resolved_klass.is_null() ) { 533 ResourceMark rm(THREAD); 534 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 535 } 536 537 // Resolve instance field 538 fieldDescriptor fd; // find_field initializes fd if found 539 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); 540 // check if field exists; i.e., if a klass containing the field def has been selected 541 if (sel_klass.is_null()){ 542 ResourceMark rm(THREAD); 543 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 544 } 545 546 // check access 547 KlassHandle ref_klass(THREAD, pool->pool_holder()); 548 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); 549 550 // check for errors 551 if (is_static != fd.is_static()) { 552 ResourceMark rm(THREAD); 553 char msg[200]; 554 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string()); 555 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 556 } 557 558 // Final fields can only be accessed from its own class. 559 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { 560 THROW(vmSymbols::java_lang_IllegalAccessError()); 561 } 562 563 // initialize resolved_klass if necessary 564 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 565 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 566 // 567 // note 2: we don't want to force initialization if we are just checking 568 // if the field access is legal; e.g., during compilation 569 if (is_static && !check_only) { 570 sel_klass->initialize(CHECK); 571 } 572 573 { 574 HandleMark hm(THREAD); 575 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); 576 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); 577 Symbol* signature_ref = pool->signature_ref_at(index); 578 { 579 ResourceMark rm(THREAD); 580 char* failed_type_name = 581 SystemDictionary::check_signature_loaders(signature_ref, 582 ref_loader, sel_loader, 583 false, 584 CHECK); 585 if (failed_type_name != NULL) { 586 const char* msg = "loader constraint violation: when resolving field" 587 " \"%s\" the class loader (instance of %s) of the referring class, " 588 "%s, and the class loader (instance of %s) for the field's resolved " 589 "type, %s, have different Class objects for that type"; 590 char* field_name = field->as_C_string(); 591 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 592 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string(); 593 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 594 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 595 strlen(sel) + strlen(loader2) + strlen(failed_type_name); 596 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 597 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 598 failed_type_name); 599 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 600 } 601 } 602 } 603 604 // return information. note that the klass is set to the actual klass containing the 605 // field, otherwise access of static fields in superclasses will not work. 606 KlassHandle holder (THREAD, fd.field_holder()); 607 Symbol* name = fd.name(); 608 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); 609 } 610 611 612 //------------------------------------------------------------------------------------------------------------------------ 613 // Invoke resolution 614 // 615 // Naming conventions: 616 // 617 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 618 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 619 // resolved_klass the specified klass (i.e., specified via constant pool index) 620 // recv_klass the receiver klass 621 622 623 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 624 Symbol* method_signature, KlassHandle current_klass, 625 bool check_access, bool initialize_class, TRAPS) { 626 methodHandle resolved_method; 627 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 628 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); 629 630 // Initialize klass (this should only happen if everything is ok) 631 if (initialize_class && resolved_klass->should_be_initialized()) { 632 resolved_klass->initialize(CHECK); 633 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 634 } 635 636 // setup result 637 result.set_static(resolved_klass, resolved_method, CHECK); 638 } 639 640 // throws linktime exceptions 641 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 642 Symbol* method_name, Symbol* method_signature, 643 KlassHandle current_klass, bool check_access, TRAPS) { 644 645 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 646 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 647 648 // check if static 649 if (!resolved_method->is_static()) { 650 ResourceMark rm(THREAD); 651 char buf[200]; 652 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 653 resolved_method->name(), 654 resolved_method->signature())); 655 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 656 } 657 } 658 659 660 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 661 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 662 methodHandle resolved_method; 663 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 664 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 665 } 666 667 // throws linktime exceptions 668 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 669 Symbol* method_name, Symbol* method_signature, 670 KlassHandle current_klass, bool check_access, TRAPS) { 671 672 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 673 674 // check if method name is <init>, that it is found in same klass as static type 675 if (resolved_method->name() == vmSymbols::object_initializer_name() && 676 resolved_method->method_holder() != resolved_klass()) { 677 ResourceMark rm(THREAD); 678 Exceptions::fthrow( 679 THREAD_AND_LOCATION, 680 vmSymbols::java_lang_NoSuchMethodError(), 681 "%s: method %s%s not found", 682 resolved_klass->external_name(), 683 resolved_method->name()->as_C_string(), 684 resolved_method->signature()->as_C_string() 685 ); 686 return; 687 } 688 689 // check if not static 690 if (resolved_method->is_static()) { 691 ResourceMark rm(THREAD); 692 char buf[200]; 693 jio_snprintf(buf, sizeof(buf), 694 "Expecting non-static method %s", 695 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 696 resolved_method->name(), 697 resolved_method->signature())); 698 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 699 } 700 } 701 702 // throws runtime exceptions 703 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 704 KlassHandle current_klass, bool check_access, TRAPS) { 705 706 // resolved method is selected method unless we have an old-style lookup 707 methodHandle sel_method(THREAD, resolved_method()); 708 709 // check if this is an old-style super call and do a new lookup if so 710 { KlassHandle method_klass = KlassHandle(THREAD, 711 resolved_method->method_holder()); 712 713 if (check_access && 714 // a) check if ACC_SUPER flag is set for the current class 715 current_klass->is_super() && 716 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) 717 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && 718 // c) check if the method is not <init> 719 resolved_method->name() != vmSymbols::object_initializer_name()) { 720 // Lookup super method 721 KlassHandle super_klass(THREAD, current_klass->super()); 722 lookup_instance_method_in_klasses(sel_method, super_klass, 723 resolved_method->name(), 724 resolved_method->signature(), CHECK); 725 // check if found 726 if (sel_method.is_null()) { 727 ResourceMark rm(THREAD); 728 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 729 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 730 resolved_method->name(), 731 resolved_method->signature())); 732 } 733 } 734 } 735 736 // check if not static 737 if (sel_method->is_static()) { 738 ResourceMark rm(THREAD); 739 char buf[200]; 740 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 741 resolved_method->name(), 742 resolved_method->signature())); 743 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 744 } 745 746 // check if abstract 747 if (sel_method->is_abstract()) { 748 ResourceMark rm(THREAD); 749 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 750 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 751 sel_method->name(), 752 sel_method->signature())); 753 } 754 755 // setup result 756 result.set_static(resolved_klass, sel_method, CHECK); 757 } 758 759 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 760 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 761 bool check_access, bool check_null_and_abstract, TRAPS) { 762 methodHandle resolved_method; 763 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 764 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 765 } 766 767 // throws linktime exceptions 768 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 769 Symbol* method_name, Symbol* method_signature, 770 KlassHandle current_klass, bool check_access, TRAPS) { 771 // normal method resolution 772 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 773 774 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 775 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 776 777 // check if not static 778 if (resolved_method->is_static()) { 779 ResourceMark rm(THREAD); 780 char buf[200]; 781 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 782 resolved_method->name(), 783 resolved_method->signature())); 784 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 785 } 786 } 787 788 // throws runtime exceptions 789 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 790 methodHandle resolved_method, 791 KlassHandle resolved_klass, 792 Handle recv, 793 KlassHandle recv_klass, 794 bool check_null_and_abstract, 795 TRAPS) { 796 797 // setup default return values 798 int vtable_index = methodOopDesc::invalid_vtable_index; 799 methodHandle selected_method; 800 801 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 802 803 // runtime method resolution 804 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 805 THROW(vmSymbols::java_lang_NullPointerException()); 806 } 807 808 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's 809 // has not been rewritten, and the vtable initialized. 810 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); 811 812 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's 813 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 814 // a missing receiver might result in a bogus lookup. 815 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); 816 817 // do lookup based on receiver klass using the vtable index 818 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method 819 vtable_index = vtable_index_of_miranda_method(resolved_klass, 820 resolved_method->name(), 821 resolved_method->signature(), CHECK); 822 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 823 824 instanceKlass* inst = instanceKlass::cast(recv_klass()); 825 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 826 } else { 827 // at this point we are sure that resolved_method is virtual and not 828 // a miranda method; therefore, it must have a valid vtable index. 829 vtable_index = resolved_method->vtable_index(); 830 // We could get a negative vtable_index for final methods, 831 // because as an optimization they are they are never put in the vtable, 832 // unless they override an existing method. 833 // If we do get a negative, it means the resolved method is the the selected 834 // method, and it can never be changed by an override. 835 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { 836 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 837 selected_method = resolved_method; 838 } else { 839 // recv_klass might be an arrayKlassOop but all vtables start at 840 // the same place. The cast is to avoid virtual call and assertion. 841 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part(); 842 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 843 } 844 } 845 846 // check if method exists 847 if (selected_method.is_null()) { 848 ResourceMark rm(THREAD); 849 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 850 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 851 resolved_method->name(), 852 resolved_method->signature())); 853 } 854 855 // check if abstract 856 if (check_null_and_abstract && selected_method->is_abstract()) { 857 ResourceMark rm(THREAD); 858 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 859 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 860 selected_method->name(), 861 selected_method->signature())); 862 } 863 864 // setup result 865 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 866 } 867 868 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 869 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 870 bool check_access, bool check_null_and_abstract, TRAPS) { 871 methodHandle resolved_method; 872 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 873 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 874 } 875 876 // throws linktime exceptions 877 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 878 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 879 // normal interface method resolution 880 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 881 882 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 883 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 884 } 885 886 // throws runtime exceptions 887 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 888 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 889 // check if receiver exists 890 if (check_null_and_abstract && recv.is_null()) { 891 THROW(vmSymbols::java_lang_NullPointerException()); 892 } 893 894 // check if receiver klass implements the resolved interface 895 if (!recv_klass->is_subtype_of(resolved_klass())) { 896 ResourceMark rm(THREAD); 897 char buf[200]; 898 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 899 (Klass::cast(recv_klass()))->external_name(), 900 (Klass::cast(resolved_klass()))->external_name()); 901 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 902 } 903 // do lookup based on receiver klass 904 methodHandle sel_method; 905 lookup_instance_method_in_klasses(sel_method, recv_klass, 906 resolved_method->name(), 907 resolved_method->signature(), CHECK); 908 // check if method exists 909 if (sel_method.is_null()) { 910 ResourceMark rm(THREAD); 911 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 912 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 913 resolved_method->name(), 914 resolved_method->signature())); 915 } 916 // check if public 917 if (!sel_method->is_public()) { 918 ResourceMark rm(THREAD); 919 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 920 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 921 sel_method->name(), 922 sel_method->signature())); 923 } 924 // check if abstract 925 if (check_null_and_abstract && sel_method->is_abstract()) { 926 ResourceMark rm(THREAD); 927 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 928 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 929 sel_method->name(), 930 sel_method->signature())); 931 } 932 // setup result 933 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); 934 } 935 936 937 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 938 KlassHandle resolved_klass, 939 Symbol* method_name, 940 Symbol* method_signature, 941 KlassHandle current_klass, 942 bool check_access) { 943 EXCEPTION_MARK; 944 methodHandle method_result; 945 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 946 if (HAS_PENDING_EXCEPTION) { 947 CLEAR_PENDING_EXCEPTION; 948 return methodHandle(); 949 } else { 950 return method_result; 951 } 952 } 953 954 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 955 KlassHandle resolved_klass, 956 Symbol* method_name, 957 Symbol* method_signature, 958 KlassHandle current_klass, 959 bool check_access) { 960 EXCEPTION_MARK; 961 methodHandle method_result; 962 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 963 if (HAS_PENDING_EXCEPTION) { 964 CLEAR_PENDING_EXCEPTION; 965 return methodHandle(); 966 } else { 967 return method_result; 968 } 969 } 970 971 methodHandle LinkResolver::resolve_virtual_call_or_null( 972 KlassHandle receiver_klass, 973 KlassHandle resolved_klass, 974 Symbol* name, 975 Symbol* signature, 976 KlassHandle current_klass) { 977 EXCEPTION_MARK; 978 CallInfo info; 979 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 980 if (HAS_PENDING_EXCEPTION) { 981 CLEAR_PENDING_EXCEPTION; 982 return methodHandle(); 983 } 984 return info.selected_method(); 985 } 986 987 methodHandle LinkResolver::resolve_interface_call_or_null( 988 KlassHandle receiver_klass, 989 KlassHandle resolved_klass, 990 Symbol* name, 991 Symbol* signature, 992 KlassHandle current_klass) { 993 EXCEPTION_MARK; 994 CallInfo info; 995 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 996 if (HAS_PENDING_EXCEPTION) { 997 CLEAR_PENDING_EXCEPTION; 998 return methodHandle(); 999 } 1000 return info.selected_method(); 1001 } 1002 1003 int LinkResolver::resolve_virtual_vtable_index( 1004 KlassHandle receiver_klass, 1005 KlassHandle resolved_klass, 1006 Symbol* name, 1007 Symbol* signature, 1008 KlassHandle current_klass) { 1009 EXCEPTION_MARK; 1010 CallInfo info; 1011 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1012 if (HAS_PENDING_EXCEPTION) { 1013 CLEAR_PENDING_EXCEPTION; 1014 return methodOopDesc::invalid_vtable_index; 1015 } 1016 return info.vtable_index(); 1017 } 1018 1019 methodHandle LinkResolver::resolve_static_call_or_null( 1020 KlassHandle resolved_klass, 1021 Symbol* name, 1022 Symbol* signature, 1023 KlassHandle current_klass) { 1024 EXCEPTION_MARK; 1025 CallInfo info; 1026 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); 1027 if (HAS_PENDING_EXCEPTION) { 1028 CLEAR_PENDING_EXCEPTION; 1029 return methodHandle(); 1030 } 1031 return info.selected_method(); 1032 } 1033 1034 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, 1035 KlassHandle current_klass) { 1036 EXCEPTION_MARK; 1037 CallInfo info; 1038 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); 1039 if (HAS_PENDING_EXCEPTION) { 1040 CLEAR_PENDING_EXCEPTION; 1041 return methodHandle(); 1042 } 1043 return info.selected_method(); 1044 } 1045 1046 1047 1048 //------------------------------------------------------------------------------------------------------------------------ 1049 // ConstantPool entries 1050 1051 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1052 switch (byte) { 1053 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1054 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1055 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1056 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1057 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1058 } 1059 return; 1060 } 1061 1062 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1063 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1064 // resolve klass 1065 resolve_klass(resolved_klass, pool, index, CHECK); 1066 1067 // Get name, signature, and static klass 1068 method_name = pool->name_ref_at(index); 1069 method_signature = pool->signature_ref_at(index); 1070 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1071 } 1072 1073 1074 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1075 KlassHandle resolved_klass; 1076 Symbol* method_name = NULL; 1077 Symbol* method_signature = NULL; 1078 KlassHandle current_klass; 1079 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1080 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1081 } 1082 1083 1084 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1085 KlassHandle resolved_klass; 1086 Symbol* method_name = NULL; 1087 Symbol* method_signature = NULL; 1088 KlassHandle current_klass; 1089 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1090 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1091 } 1092 1093 1094 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1095 constantPoolHandle pool, int index, 1096 TRAPS) { 1097 1098 KlassHandle resolved_klass; 1099 Symbol* method_name = NULL; 1100 Symbol* method_signature = NULL; 1101 KlassHandle current_klass; 1102 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1103 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); 1104 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1105 } 1106 1107 1108 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1109 KlassHandle resolved_klass; 1110 Symbol* method_name = NULL; 1111 Symbol* method_signature = NULL; 1112 KlassHandle current_klass; 1113 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1114 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); 1115 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1116 } 1117 1118 1119 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) { 1120 assert(EnableInvokeDynamic, ""); 1121 1122 // This guy is reached from InterpreterRuntime::resolve_invokedynamic. 1123 1124 // At this point, we only need the signature, and can ignore the name. 1125 Symbol* method_signature = pool->signature_ref_at(raw_index); // raw_index works directly 1126 Symbol* method_name = vmSymbols::invokeExact_name(); 1127 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); 1128 1129 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) 1130 // The extra MH receiver will be inserted into the stack on every call. 1131 methodHandle resolved_method; 1132 KlassHandle current_klass(THREAD, pool->pool_holder()); 1133 lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, THREAD); 1134 if (HAS_PENDING_EXCEPTION) { 1135 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1136 // throw these guys, since they are already wrapped 1137 return; 1138 } 1139 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1140 // intercept only LinkageErrors which might have failed to wrap 1141 return; 1142 } 1143 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1144 Handle ex(THREAD, PENDING_EXCEPTION); 1145 CLEAR_PENDING_EXCEPTION; 1146 oop bsme = Klass::cast(SystemDictionary::BootstrapMethodError_klass())->java_mirror(); 1147 MethodHandles::raise_exception(Bytecodes::_athrow, ex(), bsme, CHECK); 1148 // java code should not return, but if it does throw out anyway 1149 THROW(vmSymbols::java_lang_InternalError()); 1150 } 1151 if (resolved_method.is_null()) { 1152 THROW(vmSymbols::java_lang_InternalError()); 1153 } 1154 result.set_dynamic(resolved_method, CHECK); 1155 } 1156 1157 //------------------------------------------------------------------------------------------------------------------------ 1158 #ifndef PRODUCT 1159 1160 void FieldAccessInfo::print() { 1161 ResourceMark rm; 1162 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); 1163 } 1164 1165 #endif