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 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call"); 100 } 101 102 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) { 103 if (resolved_method.is_null()) { 104 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null"); 105 } 106 KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); 107 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic || 108 resolved_method->is_compiled_lambda_form(), 109 "linkMethod must return one of these"); 110 int vtable_index = methodOopDesc::nonvirtual_vtable_index; 111 assert(resolved_method->vtable_index() == vtable_index, ""); 112 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK); 113 _resolved_appendix = resolved_appendix; 114 _resolved_method_type = resolved_method_type; 115 } 116 117 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) { 118 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond"); 119 _resolved_klass = resolved_klass; 120 _selected_klass = selected_klass; 121 _resolved_method = resolved_method; 122 _selected_method = selected_method; 123 _vtable_index = vtable_index; 124 _resolved_appendix = Handle(); 125 if (CompilationPolicy::must_be_compiled(selected_method)) { 126 // This path is unusual, mostly used by the '-Xcomp' stress test mode. 127 128 // Note: with several active threads, the must_be_compiled may be true 129 // while can_be_compiled is false; remove assert 130 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile"); 131 if (THREAD->is_Compiler_thread()) { 132 // don't force compilation, resolve was on behalf of compiler 133 return; 134 } 135 if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) { 136 // 'is_not_initialized' means not only '!is_initialized', but also that 137 // initialization has not been started yet ('!being_initialized') 138 // Do not force compilation of methods in uninitialized classes. 139 // Note that doing this would throw an assert later, 140 // in CompileBroker::compile_method. 141 // We sometimes use the link resolver to do reflective lookups 142 // even before classes are initialized. 143 return; 144 } 145 CompileBroker::compile_method(selected_method, InvocationEntryBci, 146 CompilationPolicy::policy()->initial_compile_level(), 147 methodHandle(), 0, "must_be_compiled", CHECK); 148 } 149 } 150 151 152 //------------------------------------------------------------------------------------------------------------------------ 153 // Klass resolution 154 155 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) { 156 if (!Reflection::verify_class_access(ref_klass->as_klassOop(), 157 sel_klass->as_klassOop(), 158 true)) { 159 ResourceMark rm(THREAD); 160 Exceptions::fthrow( 161 THREAD_AND_LOCATION, 162 vmSymbols::java_lang_IllegalAccessError(), 163 "tried to access class %s from class %s", 164 sel_klass->external_name(), 165 ref_klass->external_name() 166 ); 167 return; 168 } 169 } 170 171 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 172 klassOop result_oop = pool->klass_ref_at(index, CHECK); 173 result = KlassHandle(THREAD, result_oop); 174 } 175 176 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) { 177 klassOop result_oop = 178 constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK); 179 result = KlassHandle(THREAD, result_oop); 180 } 181 182 183 //------------------------------------------------------------------------------------------------------------------------ 184 // Method resolution 185 // 186 // According to JVM spec. $5.4.3c & $5.4.3d 187 188 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 189 methodOop result_oop = klass->uncached_lookup_method(name, signature); 190 if (EnableInvokeDynamic && result_oop != NULL) { 191 vmIntrinsics::ID iid = result_oop->intrinsic_id(); 192 if (MethodHandles::is_signature_polymorphic(iid)) { 193 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method. 194 return; 195 } 196 } 197 result = methodHandle(THREAD, result_oop); 198 } 199 200 // returns first instance method 201 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 202 methodOop result_oop = klass->uncached_lookup_method(name, signature); 203 result = methodHandle(THREAD, result_oop); 204 while (!result.is_null() && result->is_static()) { 205 klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super()); 206 result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature)); 207 } 208 } 209 210 211 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 212 ResourceMark rm(THREAD); 213 klassVtable *vt = instanceKlass::cast(klass())->vtable(); 214 return vt->index_of_miranda(name, signature); 215 } 216 217 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) { 218 instanceKlass *ik = instanceKlass::cast(klass()); 219 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature)); 220 } 221 222 void LinkResolver::lookup_polymorphic_method(methodHandle& result, 223 KlassHandle klass, Symbol* name, Symbol* full_signature, 224 KlassHandle current_klass, 225 Handle *appendix_result_or_null, 226 Handle *method_type_result, 227 TRAPS) { 228 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name); 229 if (TraceMethodHandles) { 230 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s", 231 vmIntrinsics::name_at(iid), klass->external_name(), 232 name->as_C_string(), full_signature->as_C_string()); 233 } 234 if (EnableInvokeDynamic && 235 klass() == SystemDictionary::MethodHandle_klass() && 236 iid != vmIntrinsics::_none) { 237 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) { 238 // Most of these do not need an up-call to Java to resolve, so can be done anywhere. 239 // Do not erase last argument type (MemberName) if it is a static linkTo method. 240 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid); 241 TempNewSymbol basic_signature = 242 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK); 243 if (TraceMethodHandles) { 244 tty->print_cr("lookup_polymorphic_method %s %s => basic %s", 245 name->as_C_string(), 246 full_signature->as_C_string(), 247 basic_signature->as_C_string()); 248 } 249 result = SystemDictionary::find_method_handle_intrinsic(iid, 250 basic_signature, 251 CHECK); 252 if (result.not_null()) { 253 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic"); 254 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this"); 255 assert(basic_signature == result->signature(), "predict the result signature"); 256 if (TraceMethodHandles) { 257 tty->print("lookup_polymorphic_method => intrinsic "); 258 result->print_on(tty); 259 } 260 return; 261 } 262 } else if (iid == vmIntrinsics::_invokeGeneric 263 && !THREAD->is_Compiler_thread() 264 && appendix_result_or_null != NULL) { 265 // This is a method with type-checking semantics. 266 // We will ask Java code to spin an adapter method for it. 267 if (!MethodHandles::enabled()) { 268 // Make sure the Java part of the runtime has been booted up. 269 klassOop natives = SystemDictionary::MethodHandleNatives_klass(); 270 if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) { 271 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(), 272 Handle(), 273 Handle(), 274 true, 275 CHECK); 276 } 277 } 278 279 Handle appendix; 280 Handle method_type; 281 result = SystemDictionary::find_method_handle_invoker(name, 282 full_signature, 283 current_klass, 284 &appendix, 285 &method_type, 286 CHECK); 287 if (TraceMethodHandles) { 288 tty->print("lookup_polymorphic_method => (via Java) "); 289 result->print_on(tty); 290 tty->print(" lookup_polymorphic_method => appendix = "); 291 if (appendix.is_null()) tty->print_cr("(none)"); 292 else appendix->print_on(tty); 293 } 294 if (result.not_null()) { 295 #ifdef ASSERT 296 TempNewSymbol basic_signature = 297 MethodHandles::lookup_basic_type_signature(full_signature, CHECK); 298 int actual_size_of_params = result->size_of_parameters(); 299 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size(); 300 // +1 for MethodHandle.this, +1 for trailing MethodType 301 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1; 302 if (appendix.not_null()) expected_size_of_params += 1; 303 if (actual_size_of_params != expected_size_of_params) { 304 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string()); 305 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid)); 306 result->print(); 307 } 308 assert(actual_size_of_params == expected_size_of_params, 309 err_msg("%d != %d", actual_size_of_params, expected_size_of_params)); 310 #endif //ASSERT 311 312 assert(appendix_result_or_null != NULL, ""); 313 (*appendix_result_or_null) = appendix; 314 (*method_type_result) = method_type; 315 return; 316 } 317 } 318 } 319 } 320 321 void LinkResolver::check_method_accessability(KlassHandle ref_klass, 322 KlassHandle resolved_klass, 323 KlassHandle sel_klass, 324 methodHandle sel_method, 325 TRAPS) { 326 327 AccessFlags flags = sel_method->access_flags(); 328 329 // Special case: arrays always override "clone". JVMS 2.15. 330 // If the resolved klass is an array class, and the declaring class 331 // is java.lang.Object and the method is "clone", set the flags 332 // to public. 333 // 334 // We'll check for the method name first, as that's most likely 335 // to be false (so we'll short-circuit out of these tests). 336 if (sel_method->name() == vmSymbols::clone_name() && 337 sel_klass() == SystemDictionary::Object_klass() && 338 resolved_klass->oop_is_array()) { 339 // We need to change "protected" to "public". 340 assert(flags.is_protected(), "clone not protected?"); 341 jint new_flags = flags.as_int(); 342 new_flags = new_flags & (~JVM_ACC_PROTECTED); 343 new_flags = new_flags | JVM_ACC_PUBLIC; 344 flags.set_flags(new_flags); 345 } 346 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument"); 347 348 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), 349 resolved_klass->as_klassOop(), 350 sel_klass->as_klassOop(), 351 flags, 352 true)) { 353 ResourceMark rm(THREAD); 354 Exceptions::fthrow( 355 THREAD_AND_LOCATION, 356 vmSymbols::java_lang_IllegalAccessError(), 357 "tried to access method %s.%s%s from class %s", 358 sel_klass->external_name(), 359 sel_method->name()->as_C_string(), 360 sel_method->signature()->as_C_string(), 361 ref_klass->external_name() 362 ); 363 return; 364 } 365 } 366 367 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass, 368 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) { 369 370 // resolve klass 371 if (code == Bytecodes::_invokedynamic) { 372 resolved_klass = SystemDictionaryHandles::MethodHandle_klass(); 373 Symbol* method_name = vmSymbols::invoke_name(); 374 Symbol* method_signature = pool->signature_ref_at(index); 375 KlassHandle current_klass(THREAD, pool->pool_holder()); 376 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 377 return; 378 } 379 380 resolve_klass(resolved_klass, pool, index, CHECK); 381 382 Symbol* method_name = pool->name_ref_at(index); 383 Symbol* method_signature = pool->signature_ref_at(index); 384 KlassHandle current_klass(THREAD, pool->pool_holder()); 385 386 if (pool->has_preresolution() 387 || (resolved_klass() == SystemDictionary::MethodHandle_klass() && 388 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) { 389 methodOop result_oop = constantPoolOopDesc::method_at_if_loaded(pool, index); 390 if (result_oop != NULL) { 391 resolved_method = methodHandle(THREAD, result_oop); 392 return; 393 } 394 } 395 396 if (code == Bytecodes::_invokeinterface) { 397 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 398 } else { 399 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 400 } 401 } 402 403 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass, 404 Symbol* method_name, Symbol* method_signature, 405 KlassHandle current_klass, bool check_access, TRAPS) { 406 407 // 1. check if klass is not interface 408 if (resolved_klass->is_interface()) { 409 ResourceMark rm(THREAD); 410 char buf[200]; 411 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name()); 412 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 413 } 414 415 Handle nested_exception; 416 417 // 2. lookup method in resolved klass and its super klasses 418 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 419 420 if (resolved_method.is_null()) { // not found in the class hierarchy 421 // 3. lookup method in all the interfaces implemented by the resolved klass 422 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 423 424 if (resolved_method.is_null()) { 425 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc 426 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature, 427 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD); 428 if (HAS_PENDING_EXCEPTION) { 429 nested_exception = Handle(THREAD, PENDING_EXCEPTION); 430 CLEAR_PENDING_EXCEPTION; 431 } 432 } 433 434 if (resolved_method.is_null()) { 435 // 4. method lookup failed 436 ResourceMark rm(THREAD); 437 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(), 438 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 439 method_name, 440 method_signature), 441 nested_exception); 442 } 443 } 444 445 // 5. check if method is concrete 446 if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) { 447 ResourceMark rm(THREAD); 448 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 449 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 450 method_name, 451 method_signature)); 452 } 453 454 // 6. access checks, access checking may be turned off when calling from within the VM. 455 if (check_access) { 456 assert(current_klass.not_null() , "current_klass should not be null"); 457 458 // check if method can be accessed by the referring class 459 check_method_accessability(current_klass, 460 resolved_klass, 461 KlassHandle(THREAD, resolved_method->method_holder()), 462 resolved_method, 463 CHECK); 464 465 // check loader constraints 466 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); 467 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); 468 { 469 ResourceMark rm(THREAD); 470 char* failed_type_name = 471 SystemDictionary::check_signature_loaders(method_signature, loader, 472 class_loader, true, CHECK); 473 if (failed_type_name != NULL) { 474 const char* msg = "loader constraint violation: when resolving method" 475 " \"%s\" the class loader (instance of %s) of the current class, %s," 476 " and the class loader (instance of %s) for resolved class, %s, have" 477 " different Class objects for the type %s used in the signature"; 478 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); 479 const char* loader1 = SystemDictionary::loader_name(loader()); 480 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); 481 const char* loader2 = SystemDictionary::loader_name(class_loader()); 482 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); 483 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 484 strlen(current) + strlen(loader2) + strlen(resolved) + 485 strlen(failed_type_name); 486 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 487 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 488 resolved, failed_type_name); 489 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 490 } 491 } 492 } 493 } 494 495 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, 496 KlassHandle resolved_klass, 497 Symbol* method_name, 498 Symbol* method_signature, 499 KlassHandle current_klass, 500 bool check_access, TRAPS) { 501 502 // check if klass is interface 503 if (!resolved_klass->is_interface()) { 504 ResourceMark rm(THREAD); 505 char buf[200]; 506 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name()); 507 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 508 } 509 510 // lookup method in this interface or its super, java.lang.Object 511 lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK); 512 513 if (resolved_method.is_null()) { 514 // lookup method in all the super-interfaces 515 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK); 516 if (resolved_method.is_null()) { 517 // no method found 518 ResourceMark rm(THREAD); 519 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(), 520 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 521 method_name, 522 method_signature)); 523 } 524 } 525 526 if (check_access) { 527 HandleMark hm(THREAD); 528 Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader()); 529 Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader()); 530 { 531 ResourceMark rm(THREAD); 532 char* failed_type_name = 533 SystemDictionary::check_signature_loaders(method_signature, loader, 534 class_loader, true, CHECK); 535 if (failed_type_name != NULL) { 536 const char* msg = "loader constraint violation: when resolving " 537 "interface method \"%s\" the class loader (instance of %s) of the " 538 "current class, %s, and the class loader (instance of %s) for " 539 "resolved class, %s, have different Class objects for the type %s " 540 "used in the signature"; 541 char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature); 542 const char* loader1 = SystemDictionary::loader_name(loader()); 543 char* current = instanceKlass::cast(current_klass())->name()->as_C_string(); 544 const char* loader2 = SystemDictionary::loader_name(class_loader()); 545 char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string(); 546 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) + 547 strlen(current) + strlen(loader2) + strlen(resolved) + 548 strlen(failed_type_name); 549 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 550 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2, 551 resolved, failed_type_name); 552 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 553 } 554 } 555 } 556 } 557 558 //------------------------------------------------------------------------------------------------------------------------ 559 // Field resolution 560 561 void LinkResolver::check_field_accessability(KlassHandle ref_klass, 562 KlassHandle resolved_klass, 563 KlassHandle sel_klass, 564 fieldDescriptor& fd, 565 TRAPS) { 566 if (!Reflection::verify_field_access(ref_klass->as_klassOop(), 567 resolved_klass->as_klassOop(), 568 sel_klass->as_klassOop(), 569 fd.access_flags(), 570 true)) { 571 ResourceMark rm(THREAD); 572 Exceptions::fthrow( 573 THREAD_AND_LOCATION, 574 vmSymbols::java_lang_IllegalAccessError(), 575 "tried to access field %s.%s from class %s", 576 sel_klass->external_name(), 577 fd.name()->as_C_string(), 578 ref_klass->external_name() 579 ); 580 return; 581 } 582 } 583 584 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) { 585 resolve_field(result, pool, index, byte, check_only, true, CHECK); 586 } 587 588 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) { 589 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic || 590 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode"); 591 592 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic); 593 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic); 594 595 // resolve specified klass 596 KlassHandle resolved_klass; 597 if (update_pool) { 598 resolve_klass(resolved_klass, pool, index, CHECK); 599 } else { 600 resolve_klass_no_update(resolved_klass, pool, index, CHECK); 601 } 602 // Load these early in case the resolve of the containing klass fails 603 Symbol* field = pool->name_ref_at(index); 604 Symbol* sig = pool->signature_ref_at(index); 605 // Check if there's a resolved klass containing the field 606 if( resolved_klass.is_null() ) { 607 ResourceMark rm(THREAD); 608 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 609 } 610 611 // Resolve instance field 612 fieldDescriptor fd; // find_field initializes fd if found 613 KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd)); 614 // check if field exists; i.e., if a klass containing the field def has been selected 615 if (sel_klass.is_null()){ 616 ResourceMark rm(THREAD); 617 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string()); 618 } 619 620 // check access 621 KlassHandle ref_klass(THREAD, pool->pool_holder()); 622 check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK); 623 624 // check for errors 625 if (is_static != fd.is_static()) { 626 ResourceMark rm(THREAD); 627 char msg[200]; 628 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()); 629 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg); 630 } 631 632 // Final fields can only be accessed from its own class. 633 if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) { 634 THROW(vmSymbols::java_lang_IllegalAccessError()); 635 } 636 637 // initialize resolved_klass if necessary 638 // note 1: the klass which declared the field must be initialized (i.e, sel_klass) 639 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99) 640 // 641 // note 2: we don't want to force initialization if we are just checking 642 // if the field access is legal; e.g., during compilation 643 if (is_static && !check_only) { 644 sel_klass->initialize(CHECK); 645 } 646 647 { 648 HandleMark hm(THREAD); 649 Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader()); 650 Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader()); 651 Symbol* signature_ref = pool->signature_ref_at(index); 652 { 653 ResourceMark rm(THREAD); 654 char* failed_type_name = 655 SystemDictionary::check_signature_loaders(signature_ref, 656 ref_loader, sel_loader, 657 false, 658 CHECK); 659 if (failed_type_name != NULL) { 660 const char* msg = "loader constraint violation: when resolving field" 661 " \"%s\" the class loader (instance of %s) of the referring class, " 662 "%s, and the class loader (instance of %s) for the field's resolved " 663 "type, %s, have different Class objects for that type"; 664 char* field_name = field->as_C_string(); 665 const char* loader1 = SystemDictionary::loader_name(ref_loader()); 666 char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string(); 667 const char* loader2 = SystemDictionary::loader_name(sel_loader()); 668 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) + 669 strlen(sel) + strlen(loader2) + strlen(failed_type_name); 670 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen); 671 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2, 672 failed_type_name); 673 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf); 674 } 675 } 676 } 677 678 // return information. note that the klass is set to the actual klass containing the 679 // field, otherwise access of static fields in superclasses will not work. 680 KlassHandle holder (THREAD, fd.field_holder()); 681 Symbol* name = fd.name(); 682 result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags()); 683 } 684 685 686 //------------------------------------------------------------------------------------------------------------------------ 687 // Invoke resolution 688 // 689 // Naming conventions: 690 // 691 // resolved_method the specified method (i.e., static receiver specified via constant pool index) 692 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class) 693 // resolved_klass the specified klass (i.e., specified via constant pool index) 694 // recv_klass the receiver klass 695 696 697 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, 698 Symbol* method_signature, KlassHandle current_klass, 699 bool check_access, bool initialize_class, TRAPS) { 700 methodHandle resolved_method; 701 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 702 resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder())); 703 704 // Initialize klass (this should only happen if everything is ok) 705 if (initialize_class && resolved_klass->should_be_initialized()) { 706 resolved_klass->initialize(CHECK); 707 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 708 } 709 710 // setup result 711 result.set_static(resolved_klass, resolved_method, CHECK); 712 } 713 714 // throws linktime exceptions 715 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass, 716 Symbol* method_name, Symbol* method_signature, 717 KlassHandle current_klass, bool check_access, TRAPS) { 718 719 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 720 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier"); 721 722 // check if static 723 if (!resolved_method->is_static()) { 724 ResourceMark rm(THREAD); 725 char buf[200]; 726 jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 727 resolved_method->name(), 728 resolved_method->signature())); 729 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 730 } 731 } 732 733 734 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, 735 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 736 methodHandle resolved_method; 737 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 738 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK); 739 } 740 741 // throws linktime exceptions 742 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass, 743 Symbol* method_name, Symbol* method_signature, 744 KlassHandle current_klass, bool check_access, TRAPS) { 745 746 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 747 748 // check if method name is <init>, that it is found in same klass as static type 749 if (resolved_method->name() == vmSymbols::object_initializer_name() && 750 resolved_method->method_holder() != resolved_klass()) { 751 ResourceMark rm(THREAD); 752 Exceptions::fthrow( 753 THREAD_AND_LOCATION, 754 vmSymbols::java_lang_NoSuchMethodError(), 755 "%s: method %s%s not found", 756 resolved_klass->external_name(), 757 resolved_method->name()->as_C_string(), 758 resolved_method->signature()->as_C_string() 759 ); 760 return; 761 } 762 763 // check if not static 764 if (resolved_method->is_static()) { 765 ResourceMark rm(THREAD); 766 char buf[200]; 767 jio_snprintf(buf, sizeof(buf), 768 "Expecting non-static method %s", 769 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 770 resolved_method->name(), 771 resolved_method->signature())); 772 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 773 } 774 } 775 776 // throws runtime exceptions 777 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 778 KlassHandle current_klass, bool check_access, TRAPS) { 779 780 // resolved method is selected method unless we have an old-style lookup 781 methodHandle sel_method(THREAD, resolved_method()); 782 783 // check if this is an old-style super call and do a new lookup if so 784 { KlassHandle method_klass = KlassHandle(THREAD, 785 resolved_method->method_holder()); 786 787 if (check_access && 788 // a) check if ACC_SUPER flag is set for the current class 789 (current_klass->is_super() || !AllowNonVirtualCalls) && 790 // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!) 791 current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() && 792 // c) check if the method is not <init> 793 resolved_method->name() != vmSymbols::object_initializer_name()) { 794 // Lookup super method 795 KlassHandle super_klass(THREAD, current_klass->super()); 796 lookup_instance_method_in_klasses(sel_method, super_klass, 797 resolved_method->name(), 798 resolved_method->signature(), CHECK); 799 // check if found 800 if (sel_method.is_null()) { 801 ResourceMark rm(THREAD); 802 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 803 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 804 resolved_method->name(), 805 resolved_method->signature())); 806 } 807 } 808 } 809 810 // check if not static 811 if (sel_method->is_static()) { 812 ResourceMark rm(THREAD); 813 char buf[200]; 814 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 815 resolved_method->name(), 816 resolved_method->signature())); 817 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 818 } 819 820 // check if abstract 821 if (sel_method->is_abstract()) { 822 ResourceMark rm(THREAD); 823 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 824 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 825 sel_method->name(), 826 sel_method->signature())); 827 } 828 829 // setup result 830 result.set_static(resolved_klass, sel_method, CHECK); 831 } 832 833 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass, 834 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 835 bool check_access, bool check_null_and_abstract, TRAPS) { 836 methodHandle resolved_method; 837 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 838 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK); 839 } 840 841 // throws linktime exceptions 842 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass, 843 Symbol* method_name, Symbol* method_signature, 844 KlassHandle current_klass, bool check_access, TRAPS) { 845 // normal method resolution 846 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 847 848 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 849 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 850 851 // check if not static 852 if (resolved_method->is_static()) { 853 ResourceMark rm(THREAD); 854 char buf[200]; 855 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 856 resolved_method->name(), 857 resolved_method->signature())); 858 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 859 } 860 } 861 862 // throws runtime exceptions 863 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result, 864 methodHandle resolved_method, 865 KlassHandle resolved_klass, 866 Handle recv, 867 KlassHandle recv_klass, 868 bool check_null_and_abstract, 869 TRAPS) { 870 871 // setup default return values 872 int vtable_index = methodOopDesc::invalid_vtable_index; 873 methodHandle selected_method; 874 875 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop"); 876 877 // runtime method resolution 878 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists 879 THROW(vmSymbols::java_lang_NullPointerException()); 880 } 881 882 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's 883 // has not been rewritten, and the vtable initialized. 884 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); 885 886 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's 887 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since 888 // a missing receiver might result in a bogus lookup. 889 assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked"); 890 891 // do lookup based on receiver klass using the vtable index 892 if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method 893 vtable_index = vtable_index_of_miranda_method(resolved_klass, 894 resolved_method->name(), 895 resolved_method->signature(), CHECK); 896 assert(vtable_index >= 0 , "we should have valid vtable index at this point"); 897 898 instanceKlass* inst = instanceKlass::cast(recv_klass()); 899 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 900 } else { 901 // at this point we are sure that resolved_method is virtual and not 902 // a miranda method; therefore, it must have a valid vtable index. 903 vtable_index = resolved_method->vtable_index(); 904 // We could get a negative vtable_index for final methods, 905 // because as an optimization they are they are never put in the vtable, 906 // unless they override an existing method. 907 // If we do get a negative, it means the resolved method is the the selected 908 // method, and it can never be changed by an override. 909 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { 910 assert(resolved_method->can_be_statically_bound(), "cannot override this method"); 911 selected_method = resolved_method; 912 } else { 913 // recv_klass might be an arrayKlassOop but all vtables start at 914 // the same place. The cast is to avoid virtual call and assertion. 915 instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part(); 916 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index)); 917 } 918 } 919 920 // check if method exists 921 if (selected_method.is_null()) { 922 ResourceMark rm(THREAD); 923 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 924 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 925 resolved_method->name(), 926 resolved_method->signature())); 927 } 928 929 // check if abstract 930 if (check_null_and_abstract && selected_method->is_abstract()) { 931 ResourceMark rm(THREAD); 932 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 933 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()), 934 selected_method->name(), 935 selected_method->signature())); 936 } 937 938 // setup result 939 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK); 940 } 941 942 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, 943 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, 944 bool check_access, bool check_null_and_abstract, TRAPS) { 945 methodHandle resolved_method; 946 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 947 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK); 948 } 949 950 // throws linktime exceptions 951 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, 952 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) { 953 // normal interface method resolution 954 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK); 955 956 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier"); 957 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier"); 958 } 959 960 // throws runtime exceptions 961 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, 962 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) { 963 // check if receiver exists 964 if (check_null_and_abstract && recv.is_null()) { 965 THROW(vmSymbols::java_lang_NullPointerException()); 966 } 967 968 // check if receiver klass implements the resolved interface 969 if (!recv_klass->is_subtype_of(resolved_klass())) { 970 ResourceMark rm(THREAD); 971 char buf[200]; 972 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s", 973 (Klass::cast(recv_klass()))->external_name(), 974 (Klass::cast(resolved_klass()))->external_name()); 975 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); 976 } 977 // do lookup based on receiver klass 978 methodHandle sel_method; 979 lookup_instance_method_in_klasses(sel_method, recv_klass, 980 resolved_method->name(), 981 resolved_method->signature(), CHECK); 982 // check if method exists 983 if (sel_method.is_null()) { 984 ResourceMark rm(THREAD); 985 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 986 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 987 resolved_method->name(), 988 resolved_method->signature())); 989 } 990 // check if public 991 if (!sel_method->is_public()) { 992 ResourceMark rm(THREAD); 993 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), 994 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 995 sel_method->name(), 996 sel_method->signature())); 997 } 998 // check if abstract 999 if (check_null_and_abstract && sel_method->is_abstract()) { 1000 ResourceMark rm(THREAD); 1001 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), 1002 methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()), 1003 sel_method->name(), 1004 sel_method->signature())); 1005 } 1006 // setup result 1007 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK); 1008 } 1009 1010 1011 methodHandle LinkResolver::linktime_resolve_interface_method_or_null( 1012 KlassHandle resolved_klass, 1013 Symbol* method_name, 1014 Symbol* method_signature, 1015 KlassHandle current_klass, 1016 bool check_access) { 1017 EXCEPTION_MARK; 1018 methodHandle method_result; 1019 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1020 if (HAS_PENDING_EXCEPTION) { 1021 CLEAR_PENDING_EXCEPTION; 1022 return methodHandle(); 1023 } else { 1024 return method_result; 1025 } 1026 } 1027 1028 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null( 1029 KlassHandle resolved_klass, 1030 Symbol* method_name, 1031 Symbol* method_signature, 1032 KlassHandle current_klass, 1033 bool check_access) { 1034 EXCEPTION_MARK; 1035 methodHandle method_result; 1036 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD); 1037 if (HAS_PENDING_EXCEPTION) { 1038 CLEAR_PENDING_EXCEPTION; 1039 return methodHandle(); 1040 } else { 1041 return method_result; 1042 } 1043 } 1044 1045 methodHandle LinkResolver::resolve_virtual_call_or_null( 1046 KlassHandle receiver_klass, 1047 KlassHandle resolved_klass, 1048 Symbol* name, 1049 Symbol* signature, 1050 KlassHandle current_klass) { 1051 EXCEPTION_MARK; 1052 CallInfo info; 1053 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1054 if (HAS_PENDING_EXCEPTION) { 1055 CLEAR_PENDING_EXCEPTION; 1056 return methodHandle(); 1057 } 1058 return info.selected_method(); 1059 } 1060 1061 methodHandle LinkResolver::resolve_interface_call_or_null( 1062 KlassHandle receiver_klass, 1063 KlassHandle resolved_klass, 1064 Symbol* name, 1065 Symbol* signature, 1066 KlassHandle current_klass) { 1067 EXCEPTION_MARK; 1068 CallInfo info; 1069 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1070 if (HAS_PENDING_EXCEPTION) { 1071 CLEAR_PENDING_EXCEPTION; 1072 return methodHandle(); 1073 } 1074 return info.selected_method(); 1075 } 1076 1077 int LinkResolver::resolve_virtual_vtable_index( 1078 KlassHandle receiver_klass, 1079 KlassHandle resolved_klass, 1080 Symbol* name, 1081 Symbol* signature, 1082 KlassHandle current_klass) { 1083 EXCEPTION_MARK; 1084 CallInfo info; 1085 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD); 1086 if (HAS_PENDING_EXCEPTION) { 1087 CLEAR_PENDING_EXCEPTION; 1088 return methodOopDesc::invalid_vtable_index; 1089 } 1090 return info.vtable_index(); 1091 } 1092 1093 methodHandle LinkResolver::resolve_static_call_or_null( 1094 KlassHandle resolved_klass, 1095 Symbol* name, 1096 Symbol* signature, 1097 KlassHandle current_klass) { 1098 EXCEPTION_MARK; 1099 CallInfo info; 1100 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD); 1101 if (HAS_PENDING_EXCEPTION) { 1102 CLEAR_PENDING_EXCEPTION; 1103 return methodHandle(); 1104 } 1105 return info.selected_method(); 1106 } 1107 1108 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature, 1109 KlassHandle current_klass) { 1110 EXCEPTION_MARK; 1111 CallInfo info; 1112 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD); 1113 if (HAS_PENDING_EXCEPTION) { 1114 CLEAR_PENDING_EXCEPTION; 1115 return methodHandle(); 1116 } 1117 return info.selected_method(); 1118 } 1119 1120 1121 1122 //------------------------------------------------------------------------------------------------------------------------ 1123 // ConstantPool entries 1124 1125 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) { 1126 switch (byte) { 1127 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break; 1128 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break; 1129 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break; 1130 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break; 1131 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break; 1132 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break; 1133 } 1134 return; 1135 } 1136 1137 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, 1138 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) { 1139 // resolve klass 1140 resolve_klass(resolved_klass, pool, index, CHECK); 1141 1142 // Get name, signature, and static klass 1143 method_name = pool->name_ref_at(index); 1144 method_signature = pool->signature_ref_at(index); 1145 current_klass = KlassHandle(THREAD, pool->pool_holder()); 1146 } 1147 1148 1149 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1150 KlassHandle resolved_klass; 1151 Symbol* method_name = NULL; 1152 Symbol* method_signature = NULL; 1153 KlassHandle current_klass; 1154 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1155 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1156 } 1157 1158 1159 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1160 KlassHandle resolved_klass; 1161 Symbol* method_name = NULL; 1162 Symbol* method_signature = NULL; 1163 KlassHandle current_klass; 1164 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1165 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK); 1166 } 1167 1168 1169 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv, 1170 constantPoolHandle pool, int index, 1171 TRAPS) { 1172 1173 KlassHandle resolved_klass; 1174 Symbol* method_name = NULL; 1175 Symbol* method_signature = NULL; 1176 KlassHandle current_klass; 1177 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1178 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); 1179 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1180 } 1181 1182 1183 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) { 1184 KlassHandle resolved_klass; 1185 Symbol* method_name = NULL; 1186 Symbol* method_signature = NULL; 1187 KlassHandle current_klass; 1188 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1189 KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass()); 1190 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK); 1191 } 1192 1193 1194 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1195 assert(EnableInvokeDynamic, ""); 1196 // This guy is reached from InterpreterRuntime::resolve_invokehandle. 1197 KlassHandle resolved_klass; 1198 Symbol* method_name = NULL; 1199 Symbol* method_signature = NULL; 1200 KlassHandle current_klass; 1201 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK); 1202 if (TraceMethodHandles) 1203 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string()); 1204 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK); 1205 } 1206 1207 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass, 1208 Symbol* method_name, Symbol* method_signature, 1209 KlassHandle current_klass, 1210 TRAPS) { 1211 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar 1212 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), ""); 1213 assert(MethodHandles::is_signature_polymorphic_name(method_name), ""); 1214 methodHandle resolved_method; 1215 Handle resolved_appendix; 1216 Handle resolved_method_type; 1217 lookup_polymorphic_method(resolved_method, resolved_klass, 1218 method_name, method_signature, 1219 current_klass, &resolved_appendix, &resolved_method_type, CHECK); 1220 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1221 } 1222 1223 1224 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) { 1225 assert(EnableInvokeDynamic, ""); 1226 pool->set_invokedynamic(); // mark header to flag active call sites 1227 1228 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK); 1229 Symbol* method_name = pool->name_ref_at(index); 1230 Symbol* method_signature = pool->signature_ref_at(index); 1231 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder()); 1232 1233 // Resolve the bootstrap specifier (BSM + optional arguments). 1234 Handle bootstrap_specifier; 1235 // Check if CallSite has been bound already: 1236 ConstantPoolCacheEntry* cpce = pool->cache()->secondary_entry_at(index); 1237 if (cpce->is_f1_null()) { 1238 int pool_index = pool->cache()->main_entry_at(index)->constant_pool_index(); 1239 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK); 1240 assert(bsm_info != NULL, ""); 1241 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic. 1242 bootstrap_specifier = Handle(THREAD, bsm_info); 1243 } 1244 if (!cpce->is_f1_null()) { 1245 methodHandle method( THREAD, cpce->f2_as_vfinal_method()); 1246 Handle appendix( THREAD, cpce->appendix_if_resolved(pool)); 1247 Handle method_type(THREAD, cpce->method_type_if_resolved(pool)); 1248 result.set_handle(method, appendix, method_type, CHECK); 1249 return; 1250 } 1251 1252 if (TraceMethodHandles) { 1253 tty->print_cr("resolve_invokedynamic #%d %s %s", 1254 constantPoolCacheOopDesc::decode_secondary_index(index), 1255 method_name->as_C_string(), method_signature->as_C_string()); 1256 tty->print(" BSM info: "); bootstrap_specifier->print(); 1257 } 1258 1259 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK); 1260 } 1261 1262 void LinkResolver::resolve_dynamic_call(CallInfo& result, 1263 Handle bootstrap_specifier, 1264 Symbol* method_name, Symbol* method_signature, 1265 KlassHandle current_klass, 1266 TRAPS) { 1267 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...) 1268 // The appendix argument is likely to be a freshly-created CallSite. 1269 Handle resolved_appendix; 1270 Handle resolved_method_type; 1271 methodHandle resolved_method = 1272 SystemDictionary::find_dynamic_call_site_invoker(current_klass, 1273 bootstrap_specifier, 1274 method_name, method_signature, 1275 &resolved_appendix, 1276 &resolved_method_type, 1277 THREAD); 1278 if (HAS_PENDING_EXCEPTION) { 1279 if (TraceMethodHandles) { 1280 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, PENDING_EXCEPTION); 1281 PENDING_EXCEPTION->print(); 1282 } 1283 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) { 1284 // throw these guys, since they are already wrapped 1285 return; 1286 } 1287 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { 1288 // intercept only LinkageErrors which might have failed to wrap 1289 return; 1290 } 1291 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS. 1292 Handle nested_exception(THREAD, PENDING_EXCEPTION); 1293 CLEAR_PENDING_EXCEPTION; 1294 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception) 1295 } 1296 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK); 1297 } 1298 1299 //------------------------------------------------------------------------------------------------------------------------ 1300 #ifndef PRODUCT 1301 1302 void FieldAccessInfo::print() { 1303 ResourceMark rm; 1304 tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset()); 1305 } 1306 1307 #endif