1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/defaultMethods.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "classfile/vmSymbols.hpp"
  29 #include "compiler/compileBroker.hpp"
  30 #include "gc/shared/collectedHeap.inline.hpp"
  31 #include "interpreter/bytecode.hpp"
  32 #include "interpreter/interpreterRuntime.hpp"
  33 #include "interpreter/linkResolver.hpp"
  34 #include "memory/resourceArea.hpp"
  35 #include "memory/universe.inline.hpp"
  36 #include "oops/instanceKlass.hpp"
  37 #include "oops/objArrayOop.hpp"
  38 #include "oops/oop.inline.hpp"
  39 #include "prims/methodHandles.hpp"
  40 #include "prims/nativeLookup.hpp"
  41 #include "runtime/compilationPolicy.hpp"
  42 #include "runtime/fieldDescriptor.hpp"
  43 #include "runtime/frame.inline.hpp"
  44 #include "runtime/handles.inline.hpp"
  45 #include "runtime/reflection.hpp"
  46 #include "runtime/signature.hpp"
  47 #include "runtime/thread.inline.hpp"
  48 #include "runtime/vmThread.hpp"
  49 
  50 
  51 //------------------------------------------------------------------------------------------------------------------------
  52 // Implementation of CallInfo
  53 
  54 
  55 void CallInfo::set_static(KlassHandle resolved_klass, const methodHandle& resolved_method, TRAPS) {
  56   int vtable_index = Method::nonvirtual_vtable_index;
  57   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
  58 }
  59 
  60 
  61 void CallInfo::set_interface(KlassHandle resolved_klass,
  62                              KlassHandle selected_klass,
  63                              const methodHandle& resolved_method,
  64                              const methodHandle& selected_method,
  65                              int itable_index, TRAPS) {
  66   // This is only called for interface methods. If the resolved_method
  67   // comes from java/lang/Object, it can be the subject of a virtual call, so
  68   // we should pick the vtable index from the resolved method.
  69   // In that case, the caller must call set_virtual instead of set_interface.
  70   assert(resolved_method->method_holder()->is_interface(), "");
  71   assert(itable_index == resolved_method()->itable_index(), "");
  72   set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
  73 }
  74 
  75 void CallInfo::set_virtual(KlassHandle resolved_klass,
  76                            KlassHandle selected_klass,
  77                            const methodHandle& resolved_method,
  78                            const methodHandle& selected_method,
  79                            int vtable_index, TRAPS) {
  80   assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
  81   assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
  82   CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
  83   set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
  84   assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
  85 }
  86 
  87 void CallInfo::set_handle(const methodHandle& resolved_method,
  88                           Handle resolved_appendix,
  89                           Handle resolved_method_type, TRAPS) {
  90   if (resolved_method.is_null()) {
  91     THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
  92   }
  93   KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
  94   assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
  95          resolved_method->is_compiled_lambda_form(),
  96          "linkMethod must return one of these");
  97   int vtable_index = Method::nonvirtual_vtable_index;
  98   assert(!resolved_method->has_vtable_index(), "");
  99   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
 100   _resolved_appendix    = resolved_appendix;
 101   _resolved_method_type = resolved_method_type;
 102 }
 103 
 104 void CallInfo::set_common(KlassHandle resolved_klass,
 105                           KlassHandle selected_klass,
 106                           const methodHandle& resolved_method,
 107                           const methodHandle& selected_method,
 108                           CallKind kind,
 109                           int index,
 110                           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   _call_kind       = kind;
 117   _call_index      = index;
 118   _resolved_appendix = Handle();
 119   DEBUG_ONLY(verify());  // verify before making side effects
 120 
 121   if (CompilationPolicy::must_be_compiled(selected_method)) {
 122     // This path is unusual, mostly used by the '-Xcomp' stress test mode.
 123 
 124     // Note: with several active threads, the must_be_compiled may be true
 125     //       while can_be_compiled is false; remove assert
 126     // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
 127     if (THREAD->is_Compiler_thread()) {
 128       // don't force compilation, resolve was on behalf of compiler
 129       return;
 130     }
 131     if (selected_method->method_holder()->is_not_initialized()) {
 132       // 'is_not_initialized' means not only '!is_initialized', but also that
 133       // initialization has not been started yet ('!being_initialized')
 134       // Do not force compilation of methods in uninitialized classes.
 135       // Note that doing this would throw an assert later,
 136       // in CompileBroker::compile_method.
 137       // We sometimes use the link resolver to do reflective lookups
 138       // even before classes are initialized.
 139       return;
 140     }
 141     CompileBroker::compile_method(selected_method, InvocationEntryBci,
 142                                   CompilationPolicy::policy()->initial_compile_level(),
 143                                   methodHandle(), 0, "must_be_compiled", CHECK);
 144   }
 145 }
 146 
 147 // utility query for unreflecting a method
 148 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
 149   Klass* resolved_method_holder = resolved_method->method_holder();
 150   if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
 151     resolved_klass = resolved_method_holder;
 152   }
 153   _resolved_klass  = resolved_klass;
 154   _selected_klass  = resolved_klass;
 155   _resolved_method = resolved_method;
 156   _selected_method = resolved_method;
 157   // classify:
 158   CallKind kind = CallInfo::unknown_kind;
 159   int index = resolved_method->vtable_index();
 160   if (resolved_method->can_be_statically_bound()) {
 161     kind = CallInfo::direct_call;
 162   } else if (!resolved_method_holder->is_interface()) {
 163     // Could be an Object method inherited into an interface, but still a vtable call.
 164     kind = CallInfo::vtable_call;
 165   } else if (!resolved_klass->is_interface()) {
 166     // A default or miranda method.  Compute the vtable index.
 167     ResourceMark rm;
 168     klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
 169     index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
 170                            resolved_method);
 171     assert(index >= 0 , "we should have valid vtable index at this point");
 172 
 173     kind = CallInfo::vtable_call;
 174   } else if (resolved_method->has_vtable_index()) {
 175     // Can occur if an interface redeclares a method of Object.
 176 
 177 #ifdef ASSERT
 178     // Ensure that this is really the case.
 179     KlassHandle object_klass = SystemDictionary::Object_klass();
 180     Method * object_resolved_method = object_klass()->vtable()->method_at(index);
 181     assert(object_resolved_method->name() == resolved_method->name(),
 182       err_msg("Object and interface method names should match at vtable index %d, %s != %s",
 183       index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
 184     assert(object_resolved_method->signature() == resolved_method->signature(),
 185       err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
 186       index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
 187 #endif // ASSERT
 188 
 189     kind = CallInfo::vtable_call;
 190   } else {
 191     // A regular interface call.
 192     kind = CallInfo::itable_call;
 193     index = resolved_method->itable_index();
 194   }
 195   assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
 196   _call_kind  = kind;
 197   _call_index = index;
 198   _resolved_appendix = Handle();
 199   DEBUG_ONLY(verify());
 200 }
 201 
 202 #ifdef ASSERT
 203 void CallInfo::verify() {
 204   switch (call_kind()) {  // the meaning and allowed value of index depends on kind
 205   case CallInfo::direct_call:
 206     if (_call_index == Method::nonvirtual_vtable_index)  break;
 207     // else fall through to check vtable index:
 208   case CallInfo::vtable_call:
 209     assert(resolved_klass()->verify_vtable_index(_call_index), "");
 210     break;
 211   case CallInfo::itable_call:
 212     assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
 213     break;
 214   case CallInfo::unknown_kind:
 215     assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
 216     break;
 217   default:
 218     fatal(err_msg_res("Unexpected call kind %d", call_kind()));
 219   }
 220 }
 221 #endif //ASSERT
 222 
 223 #ifndef PRODUCT
 224 void CallInfo::print() {
 225   ResourceMark rm;
 226   const char* kindstr = "unknown";
 227   switch (_call_kind) {
 228   case direct_call: kindstr = "direct"; break;
 229   case vtable_call: kindstr = "vtable"; break;
 230   case itable_call: kindstr = "itable"; break;
 231   }
 232   tty->print_cr("Call %s@%d %s", kindstr, _call_index,
 233                 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
 234 }
 235 #endif
 236 
 237 //------------------------------------------------------------------------------------------------------------------------
 238 // Implementation of LinkInfo
 239 
 240 LinkInfo::LinkInfo(constantPoolHandle pool, int index, TRAPS) {
 241    // resolve klass
 242   Klass* result = pool->klass_ref_at(index, CHECK);
 243   _resolved_klass = KlassHandle(THREAD, result);
 244 
 245   // Get name, signature, and static klass
 246   _name          = pool->name_ref_at(index);
 247   _signature     = pool->signature_ref_at(index);
 248   _current_klass = KlassHandle(THREAD, pool->pool_holder());
 249 
 250   // Coming from the constant pool always checks access
 251   _check_access  = true;
 252 }
 253 
 254 char* LinkInfo::method_string() const {
 255   return Method::name_and_sig_as_C_string(_resolved_klass(), _name, _signature);
 256 }
 257 
 258 #ifndef PRODUCT
 259 void LinkInfo::print() {
 260   ResourceMark rm;
 261   tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
 262                 _resolved_klass->name()->as_C_string(),
 263                 _name->as_C_string(),
 264                 _signature->as_C_string(),
 265                 _current_klass.is_null() ? "(none)" : _current_klass->name()->as_C_string(),
 266                 _check_access ? "true" : "false");
 267 }
 268 #endif // PRODUCT
 269 //------------------------------------------------------------------------------------------------------------------------
 270 // Klass resolution
 271 
 272 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
 273   if (!Reflection::verify_class_access(ref_klass(),
 274                                        sel_klass(),
 275                                        true)) {
 276     ResourceMark rm(THREAD);
 277     Exceptions::fthrow(
 278       THREAD_AND_LOCATION,
 279       vmSymbols::java_lang_IllegalAccessError(),
 280       "tried to access class %s from class %s",
 281       sel_klass->external_name(),
 282       ref_klass->external_name()
 283     );
 284     return;
 285   }
 286 }
 287 
 288 //------------------------------------------------------------------------------------------------------------------------
 289 // Method resolution
 290 //
 291 // According to JVM spec. $5.4.3c & $5.4.3d
 292 
 293 // Look up method in klasses, including static methods
 294 // Then look up local default methods
 295 methodHandle LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
 296                                                     bool checkpolymorphism,
 297                                                     bool in_imethod_resolve, TRAPS) {
 298   KlassHandle klass = link_info.resolved_klass();
 299   Symbol* name = link_info.name();
 300   Symbol* signature = link_info.signature();
 301 
 302   // Ignore overpasses so statics can be found during resolution
 303   Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
 304 
 305   if (klass->oop_is_array()) {
 306     // Only consider klass and super klass for arrays
 307     return methodHandle(THREAD, result);
 308   }
 309 
 310   // JDK 8, JVMS 5.4.3.4: Interface method resolution should
 311   // ignore static and non-public methods of java.lang.Object,
 312   // like clone, finalize, registerNatives.
 313   if (in_imethod_resolve &&
 314       result != NULL &&
 315       klass->is_interface() &&
 316       (result->is_static() || !result->is_public()) &&
 317       result->method_holder() == SystemDictionary::Object_klass()) {
 318     result = NULL;
 319   }
 320 
 321   // Before considering default methods, check for an overpass in the
 322   // current class if a method has not been found.
 323   if (result == NULL) {
 324     result = InstanceKlass::cast(klass())->find_method(name, signature);
 325   }
 326 
 327   if (result == NULL) {
 328     Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
 329     if (default_methods != NULL) {
 330       result = InstanceKlass::find_method(default_methods, name, signature);
 331     }
 332   }
 333 
 334   if (checkpolymorphism && result != NULL) {
 335     vmIntrinsics::ID iid = result->intrinsic_id();
 336     if (MethodHandles::is_signature_polymorphic(iid)) {
 337       // Do not link directly to these.  The VM must produce a synthetic one using lookup_polymorphic_method.
 338       return NULL;
 339     }
 340   }
 341   return methodHandle(THREAD, result);
 342 }
 343 
 344 // returns first instance method
 345 // Looks up method in classes, then looks up local default methods
 346 methodHandle LinkResolver::lookup_instance_method_in_klasses(KlassHandle klass,
 347                                                              Symbol* name,
 348                                                              Symbol* signature, TRAPS) {
 349   Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
 350 
 351   while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
 352     Klass* super_klass = result->method_holder()->super();
 353     result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
 354   }
 355 
 356   if (klass->oop_is_array()) {
 357     // Only consider klass and super klass for arrays
 358     return methodHandle(THREAD, result);
 359   }
 360 
 361   if (result == NULL) {
 362     Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
 363     if (default_methods != NULL) {
 364       result = InstanceKlass::find_method(default_methods, name, signature);
 365       assert(result == NULL || !result->is_static(), "static defaults not allowed");
 366     }
 367   }
 368   return methodHandle(THREAD, result);
 369 }
 370 
 371 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
 372                                                    const methodHandle& resolved_method) {
 373 
 374   int vtable_index = Method::invalid_vtable_index;
 375   Symbol* name = resolved_method->name();
 376   Symbol* signature = resolved_method->signature();
 377 
 378   // First check in default method array
 379   if (!resolved_method->is_abstract() &&
 380     (InstanceKlass::cast(klass())->default_methods() != NULL)) {
 381     int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(),
 382                                                  name, signature, Klass::find_overpass, Klass::find_static);

 383     if (index >= 0 ) {
 384       vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
 385     }
 386   }
 387   if (vtable_index == Method::invalid_vtable_index) {
 388     // get vtable_index for miranda methods
 389     ResourceMark rm;
 390     klassVtable *vt = InstanceKlass::cast(klass())->vtable();
 391     vtable_index = vt->index_of_miranda(name, signature);
 392   }
 393   return vtable_index;
 394 }
 395 
 396 methodHandle LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info, TRAPS) {
 397   InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass()());
 398 
 399   // Specify 'true' in order to skip default methods when searching the
 400   // interfaces.  Function lookup_method_in_klasses() already looked for
 401   // the method in the default methods table.
 402   return methodHandle(THREAD,
 403     ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(),
 404     Klass::skip_defaults));
 405 }
 406 
 407 methodHandle LinkResolver::lookup_polymorphic_method(
 408                                              const LinkInfo& link_info,
 409                                              Handle *appendix_result_or_null,
 410                                              Handle *method_type_result,
 411                                              TRAPS) {
 412   KlassHandle klass = link_info.resolved_klass();
 413   Symbol* name = link_info.name();
 414   Symbol* full_signature = link_info.signature();
 415 
 416   vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
 417   if (TraceMethodHandles) {
 418     ResourceMark rm(THREAD);
 419     tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
 420                   vmIntrinsics::name_at(iid), klass->external_name(),
 421                   name->as_C_string(), full_signature->as_C_string());
 422   }
 423   if (klass() == SystemDictionary::MethodHandle_klass() &&
 424       iid != vmIntrinsics::_none) {
 425     if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
 426       // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
 427       // Do not erase last argument type (MemberName) if it is a static linkTo method.
 428       bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
 429       TempNewSymbol basic_signature =
 430         MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
 431       if (TraceMethodHandles) {
 432         ResourceMark rm(THREAD);
 433         tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
 434                       name->as_C_string(),
 435                       full_signature->as_C_string(),
 436                       basic_signature->as_C_string());
 437       }
 438       methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
 439                                                               basic_signature,
 440                                                               CHECK_NULL);
 441       if (result.not_null()) {
 442         assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
 443         assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
 444         assert(basic_signature == result->signature(), "predict the result signature");
 445         if (TraceMethodHandles) {
 446           tty->print("lookup_polymorphic_method => intrinsic ");
 447           result->print_on(tty);
 448         }
 449       }
 450       return result;
 451     } else if (iid == vmIntrinsics::_invokeGeneric
 452                && !THREAD->is_Compiler_thread()
 453                && appendix_result_or_null != NULL) {
 454       // This is a method with type-checking semantics.
 455       // We will ask Java code to spin an adapter method for it.
 456       if (!MethodHandles::enabled()) {
 457         // Make sure the Java part of the runtime has been booted up.
 458         Klass* natives = SystemDictionary::MethodHandleNatives_klass();
 459         if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
 460           SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
 461                                             Handle(),
 462                                             Handle(),
 463                                             true,
 464                                             CHECK_NULL);
 465         }
 466       }
 467 
 468       Handle appendix;
 469       Handle method_type;
 470       methodHandle result = SystemDictionary::find_method_handle_invoker(
 471                                                             name,
 472                                                             full_signature,
 473                                                             link_info.current_klass(),
 474                                                             &appendix,
 475                                                             &method_type,
 476                                                             CHECK_NULL);
 477       if (TraceMethodHandles) {
 478         tty->print("lookup_polymorphic_method => (via Java) ");
 479         result->print_on(tty);
 480         tty->print("  lookup_polymorphic_method => appendix = ");
 481         if (appendix.is_null())  tty->print_cr("(none)");
 482         else                     appendix->print_on(tty);
 483       }
 484       if (result.not_null()) {
 485 #ifdef ASSERT
 486         ResourceMark rm(THREAD);
 487 
 488         TempNewSymbol basic_signature =
 489           MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
 490         int actual_size_of_params = result->size_of_parameters();
 491         int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
 492         // +1 for MethodHandle.this, +1 for trailing MethodType
 493         if (!MethodHandles::is_signature_polymorphic_static(iid))  expected_size_of_params += 1;
 494         if (appendix.not_null())                                   expected_size_of_params += 1;
 495         if (actual_size_of_params != expected_size_of_params) {
 496           tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
 497           tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
 498           result->print();
 499         }
 500         assert(actual_size_of_params == expected_size_of_params,
 501                err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
 502 #endif //ASSERT
 503 
 504         assert(appendix_result_or_null != NULL, "");
 505         (*appendix_result_or_null) = appendix;
 506         (*method_type_result)      = method_type;
 507       }
 508       return result;
 509     }
 510   }
 511   return NULL;
 512 }
 513 
 514 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
 515                                               KlassHandle resolved_klass,
 516                                               KlassHandle sel_klass,
 517                                               const methodHandle& sel_method,
 518                                               TRAPS) {
 519 
 520   AccessFlags flags = sel_method->access_flags();
 521 
 522   // Special case:  arrays always override "clone". JVMS 2.15.
 523   // If the resolved klass is an array class, and the declaring class
 524   // is java.lang.Object and the method is "clone", set the flags
 525   // to public.
 526   //
 527   // We'll check for the method name first, as that's most likely
 528   // to be false (so we'll short-circuit out of these tests).
 529   if (sel_method->name() == vmSymbols::clone_name() &&
 530       sel_klass() == SystemDictionary::Object_klass() &&
 531       resolved_klass->oop_is_array()) {
 532     // We need to change "protected" to "public".
 533     assert(flags.is_protected(), "clone not protected?");
 534     jint new_flags = flags.as_int();
 535     new_flags = new_flags & (~JVM_ACC_PROTECTED);
 536     new_flags = new_flags | JVM_ACC_PUBLIC;
 537     flags.set_flags(new_flags);
 538   }
 539 //  assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
 540 
 541   if (!Reflection::verify_field_access(ref_klass(),
 542                                        resolved_klass(),
 543                                        sel_klass(),
 544                                        flags,
 545                                        true)) {
 546     ResourceMark rm(THREAD);
 547     Exceptions::fthrow(
 548       THREAD_AND_LOCATION,
 549       vmSymbols::java_lang_IllegalAccessError(),
 550       "tried to access method %s.%s%s from class %s",
 551       sel_klass->external_name(),
 552       sel_method->name()->as_C_string(),
 553       sel_method->signature()->as_C_string(),
 554       ref_klass->external_name()
 555     );
 556     return;
 557   }
 558 }
 559 
 560 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
 561                                                      constantPoolHandle pool, int index, TRAPS) {
 562   // This method is used only
 563   // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
 564   // and
 565   // (2) in Bytecode_invoke::static_target
 566   // It appears to fail when applied to an invokeinterface call site.
 567   // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
 568   // resolve klass
 569   KlassHandle resolved_klass;
 570   if (code == Bytecodes::_invokedynamic) {
 571     resolved_klass = SystemDictionary::MethodHandle_klass();
 572     Symbol* method_name = vmSymbols::invoke_name();
 573     Symbol* method_signature = pool->signature_ref_at(index);
 574     KlassHandle  current_klass(THREAD, pool->pool_holder());
 575     LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
 576     return resolve_method(link_info, /*require_methodref*/false, THREAD);
 577   }
 578 
 579   LinkInfo link_info(pool, index, CHECK_NULL);
 580   resolved_klass = link_info.resolved_klass();
 581 
 582   if (pool->has_preresolution()
 583       || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
 584           MethodHandles::is_signature_polymorphic_name(resolved_klass(), link_info.name()))) {
 585     Method* result = ConstantPool::method_at_if_loaded(pool, index);
 586     if (result != NULL) {
 587       return methodHandle(THREAD, result);
 588     }
 589   }
 590 
 591   if (code == Bytecodes::_invokeinterface) {
 592     return resolve_interface_method(link_info, true, THREAD);
 593   } else if (code == Bytecodes::_invokevirtual) {
 594     return resolve_method(link_info, /*require_methodref*/true, THREAD);
 595   } else if (!resolved_klass->is_interface()) {
 596     return resolve_method(link_info, /*require_methodref*/false, THREAD);
 597   } else {
 598     bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
 599     return resolve_interface_method(link_info, nostatics, THREAD);
 600   }
 601 }
 602 
 603 // Check and print a loader constraint violation message for method or interface method
 604 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
 605                                                    const methodHandle& resolved_method,
 606                                                    const char* method_type, TRAPS) {
 607   Handle current_loader(THREAD, link_info.current_klass()->class_loader());
 608   Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
 609 
 610   ResourceMark rm(THREAD);
 611   Symbol* failed_type_symbol =
 612     SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
 613                                               resolved_loader, true, CHECK);
 614   if (failed_type_symbol != NULL) {
 615     const char* msg = "loader constraint violation: when resolving %s"
 616       " \"%s\" the class loader (instance of %s) of the current class, %s,"
 617       " and the class loader (instance of %s) for the method's defining class, %s, have"
 618       " different Class objects for the type %s used in the signature";
 619     char* sig = link_info.method_string();
 620     const char* loader1_name = SystemDictionary::loader_name(current_loader());
 621     char* current = link_info.current_klass()->name()->as_C_string();
 622     const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
 623     char* target = resolved_method->method_holder()->name()->as_C_string();
 624     char* failed_type_name = failed_type_symbol->as_C_string();
 625     size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
 626       strlen(current) + strlen(loader2_name) + strlen(target) +
 627       strlen(failed_type_name) + strlen(method_type) + 1;
 628     char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
 629     jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
 630                  target, failed_type_name);
 631     THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
 632   }
 633 }
 634 
 635 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
 636                                                   KlassHandle current_klass,
 637                                                   KlassHandle sel_klass, TRAPS) {
 638   Handle ref_loader(THREAD, current_klass->class_loader());
 639   Handle sel_loader(THREAD, sel_klass->class_loader());
 640 
 641   ResourceMark rm(THREAD);  // needed for check_signature_loaders
 642   Symbol* failed_type_symbol =
 643     SystemDictionary::check_signature_loaders(sig,
 644                                               ref_loader, sel_loader,
 645                                               false,
 646                                               CHECK);
 647   if (failed_type_symbol != NULL) {
 648     const char* msg = "loader constraint violation: when resolving field"
 649       " \"%s\" the class loader (instance of %s) of the referring class, "
 650       "%s, and the class loader (instance of %s) for the field's resolved "
 651       "type, %s, have different Class objects for that type";
 652     char* field_name = field->as_C_string();
 653     const char* loader1_name = SystemDictionary::loader_name(ref_loader());
 654     char* sel = sel_klass->name()->as_C_string();
 655     const char* loader2_name = SystemDictionary::loader_name(sel_loader());
 656     char* failed_type_name = failed_type_symbol->as_C_string();
 657     size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
 658                     strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
 659     char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
 660     jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
 661                      failed_type_name);
 662     THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
 663   }
 664 }
 665 
 666 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
 667                                           bool require_methodref, TRAPS) {
 668 
 669   Handle nested_exception;
 670   KlassHandle resolved_klass = link_info.resolved_klass();
 671 
 672   // 1. check if methodref required, that resolved_klass is not interfacemethodref
 673   if (require_methodref && resolved_klass->is_interface()) {
 674     ResourceMark rm(THREAD);
 675     char buf[200];
 676     jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
 677         resolved_klass()->external_name());
 678     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 679   }
 680 
 681   // 2. lookup method in resolved klass and its super klasses
 682   methodHandle resolved_method = lookup_method_in_klasses(link_info, true, false, CHECK_NULL);
 683 
 684   if (resolved_method.is_null() && !resolved_klass->oop_is_array()) { // not found in the class hierarchy
 685     // 3. lookup method in all the interfaces implemented by the resolved klass
 686     resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
 687 
 688     if (resolved_method.is_null()) {
 689       // JSR 292:  see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
 690       resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
 691       if (HAS_PENDING_EXCEPTION) {
 692         nested_exception = Handle(THREAD, PENDING_EXCEPTION);
 693         CLEAR_PENDING_EXCEPTION;
 694       }
 695     }
 696   }
 697 
 698   if (resolved_method.is_null()) {
 699     // 4. method lookup failed
 700     ResourceMark rm(THREAD);
 701     THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
 702                     Method::name_and_sig_as_C_string(resolved_klass(),
 703                                                      link_info.name(),
 704                                                      link_info.signature()),
 705                     nested_exception, NULL);
 706   }
 707 
 708   // 5. access checks, access checking may be turned off when calling from within the VM.
 709   KlassHandle current_klass = link_info.current_klass();
 710   if (link_info.check_access()) {
 711     assert(current_klass.not_null() , "current_klass should not be null");
 712 
 713     // check if method can be accessed by the referring class
 714     check_method_accessability(current_klass,
 715                                resolved_klass,
 716                                KlassHandle(THREAD, resolved_method->method_holder()),
 717                                resolved_method,
 718                                CHECK_NULL);
 719 
 720     // check loader constraints
 721     check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
 722   }
 723 
 724   return resolved_method;
 725 }
 726 
 727 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info,
 728                                                     bool nostatics, TRAPS) {
 729 
 730   KlassHandle resolved_klass = link_info.resolved_klass();
 731 
 732   // check if klass is interface
 733   if (!resolved_klass->is_interface()) {
 734     ResourceMark rm(THREAD);
 735     char buf[200];
 736     jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
 737     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 738   }
 739 
 740   // lookup method in this interface or its super, java.lang.Object
 741   // JDK8: also look for static methods
 742   methodHandle resolved_method = lookup_method_in_klasses(link_info, false, true, CHECK_NULL);
 743 
 744   if (resolved_method.is_null() && !resolved_klass->oop_is_array()) {
 745     // lookup method in all the super-interfaces
 746     resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
 747   }
 748 
 749   if (resolved_method.is_null()) {
 750     // no method found
 751     ResourceMark rm(THREAD);
 752     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
 753                    Method::name_and_sig_as_C_string(resolved_klass(),
 754                                                     link_info.name(),
 755                                                     link_info.signature()));
 756   }
 757 
 758   if (link_info.check_access()) {
 759     // JDK8 adds non-public interface methods, and accessability check requirement
 760     KlassHandle current_klass = link_info.current_klass();
 761 
 762     assert(current_klass.not_null() , "current_klass should not be null");
 763 
 764     // check if method can be accessed by the referring class
 765     check_method_accessability(current_klass,
 766                                resolved_klass,
 767                                KlassHandle(THREAD, resolved_method->method_holder()),
 768                                resolved_method,
 769                                CHECK_NULL);
 770 
 771     check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
 772   }
 773 
 774   if (nostatics && resolved_method->is_static()) {
 775     ResourceMark rm(THREAD);
 776     char buf[200];
 777     jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
 778                  Method::name_and_sig_as_C_string(resolved_klass(),
 779                  resolved_method->name(), resolved_method->signature()));
 780     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 781   }
 782 
 783   if (TraceItables && Verbose) {
 784     trace_method_resolution("invokeinterface resolved method: caller-class",
 785                             link_info.current_klass(), resolved_klass, resolved_method);
 786     tty->cr();
 787   }
 788 
 789   return resolved_method;
 790 }
 791 
 792 //------------------------------------------------------------------------------------------------------------------------
 793 // Field resolution
 794 
 795 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
 796                                              KlassHandle resolved_klass,
 797                                              KlassHandle sel_klass,
 798                                              const fieldDescriptor& fd,
 799                                              TRAPS) {
 800   if (!Reflection::verify_field_access(ref_klass(),
 801                                        resolved_klass(),
 802                                        sel_klass(),
 803                                        fd.access_flags(),
 804                                        true)) {
 805     ResourceMark rm(THREAD);
 806     Exceptions::fthrow(
 807       THREAD_AND_LOCATION,
 808       vmSymbols::java_lang_IllegalAccessError(),
 809       "tried to access field %s.%s from class %s",
 810       sel_klass->external_name(),
 811       fd.name()->as_C_string(),
 812       ref_klass->external_name()
 813     );
 814     return;
 815   }
 816 }
 817 
 818 void LinkResolver::resolve_field_access(fieldDescriptor& fd, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
 819   LinkInfo link_info(pool, index, CHECK);
 820   resolve_field(fd, link_info, byte, true, CHECK);
 821 }
 822 
 823 void LinkResolver::resolve_field(fieldDescriptor& fd,
 824                                  const LinkInfo& link_info,
 825                                  Bytecodes::Code byte, bool initialize_class,
 826                                  TRAPS) {
 827   assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
 828          byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield  ||
 829          byte == Bytecodes::_nofast_getfield  || byte == Bytecodes::_nofast_putfield  ||
 830          (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
 831 
 832   bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
 833   bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
 834   // Check if there's a resolved klass containing the field
 835   KlassHandle resolved_klass = link_info.resolved_klass();
 836   Symbol* field = link_info.name();
 837   Symbol* sig = link_info.signature();
 838 
 839   if (resolved_klass.is_null()) {
 840     ResourceMark rm(THREAD);
 841     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
 842   }
 843 
 844   // Resolve instance field
 845   KlassHandle sel_klass(THREAD, resolved_klass->find_field(field, sig, &fd));
 846   // check if field exists; i.e., if a klass containing the field def has been selected
 847   if (sel_klass.is_null()) {
 848     ResourceMark rm(THREAD);
 849     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
 850   }
 851 
 852   if (!link_info.check_access())
 853     // Access checking may be turned off when calling from within the VM.
 854     return;
 855 
 856   // check access
 857   KlassHandle current_klass = link_info.current_klass();
 858   check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
 859 
 860   // check for errors
 861   if (is_static != fd.is_static()) {
 862     ResourceMark rm(THREAD);
 863     char msg[200];
 864     jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
 865     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
 866   }
 867 
 868   // Final fields can only be accessed from its own class.
 869   if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
 870     THROW(vmSymbols::java_lang_IllegalAccessError());
 871   }
 872 
 873   // initialize resolved_klass if necessary
 874   // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
 875   //         according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
 876   //
 877   // note 2: we don't want to force initialization if we are just checking
 878   //         if the field access is legal; e.g., during compilation
 879   if (is_static && initialize_class) {
 880     sel_klass->initialize(CHECK);
 881   }
 882 
 883   if (sel_klass() != current_klass()) {
 884     check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
 885   }
 886 
 887   // return information. note that the klass is set to the actual klass containing the
 888   // field, otherwise access of static fields in superclasses will not work.
 889 }
 890 
 891 
 892 //------------------------------------------------------------------------------------------------------------------------
 893 // Invoke resolution
 894 //
 895 // Naming conventions:
 896 //
 897 // resolved_method    the specified method (i.e., static receiver specified via constant pool index)
 898 // sel_method         the selected method  (selected via run-time lookup; e.g., based on dynamic receiver class)
 899 // resolved_klass     the specified klass  (i.e., specified via constant pool index)
 900 // recv_klass         the receiver klass
 901 
 902 
 903 void LinkResolver::resolve_static_call(CallInfo& result,
 904                                        const LinkInfo& link_info,
 905                                        bool initialize_class, TRAPS) {
 906   methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
 907 
 908   // The resolved class can change as a result of this resolution.
 909   KlassHandle resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
 910 
 911   Method* save_resolved_method = resolved_method();
 912   // Initialize klass (this should only happen if everything is ok)
 913   if (initialize_class && resolved_klass->should_be_initialized()) {
 914     resolved_klass->initialize(CHECK);
 915     // Use updated LinkInfo (to reresolve with resolved_klass as method_holder?)
 916     LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
 917                       link_info.current_klass(), link_info.check_access());
 918     resolved_method = linktime_resolve_static_method(new_info, CHECK);
 919   }
 920 
 921   assert(save_resolved_method == resolved_method(), "does this change?");
 922   // setup result
 923   result.set_static(resolved_klass, resolved_method, CHECK);
 924 }
 925 
 926 // throws linktime exceptions
 927 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
 928 
 929   KlassHandle resolved_klass = link_info.resolved_klass();
 930   methodHandle resolved_method;
 931   if (!resolved_klass->is_interface()) {
 932     resolved_method = resolve_method(link_info, /*require_methodref*/false, CHECK_NULL);
 933   } else {
 934     resolved_method = resolve_interface_method(link_info, /*nostatics*/false, CHECK_NULL);
 935   }
 936   assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
 937 
 938   // check if static
 939   if (!resolved_method->is_static()) {
 940     ResourceMark rm(THREAD);
 941     char buf[200];
 942     jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
 943                                                       resolved_method->name(),
 944                                                       resolved_method->signature()));
 945     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 946   }
 947   return resolved_method;
 948 }
 949 
 950 
 951 void LinkResolver::resolve_special_call(CallInfo& result,
 952                                         const LinkInfo& link_info,
 953                                         TRAPS) {
 954   methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
 955   runtime_resolve_special_method(result, resolved_method,
 956                                  link_info.resolved_klass(),
 957                                  link_info.current_klass(),
 958                                  link_info.check_access(), CHECK);
 959 }
 960 
 961 // throws linktime exceptions
 962 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
 963                                                            TRAPS) {
 964 
 965   // Invokespecial is called for multiple special reasons:
 966   // <init>
 967   // local private method invocation, for classes and interfaces
 968   // superclass.method, which can also resolve to a default method
 969   // and the selected method is recalculated relative to the direct superclass
 970   // superinterface.method, which explicitly does not check shadowing
 971   KlassHandle resolved_klass = link_info.resolved_klass();
 972   methodHandle resolved_method;
 973 
 974   if (!resolved_klass->is_interface()) {
 975     resolved_method = resolve_method(link_info, /*require_methodref*/false, CHECK_NULL);
 976   } else {
 977     resolved_method = resolve_interface_method(link_info, /*nostatics*/true, CHECK_NULL);
 978   }
 979 
 980   // check if method name is <init>, that it is found in same klass as static type
 981   if (resolved_method->name() == vmSymbols::object_initializer_name() &&
 982       resolved_method->method_holder() != resolved_klass()) {
 983     ResourceMark rm(THREAD);
 984     Exceptions::fthrow(
 985       THREAD_AND_LOCATION,
 986       vmSymbols::java_lang_NoSuchMethodError(),
 987       "%s: method %s%s not found",
 988       resolved_klass->external_name(),
 989       resolved_method->name()->as_C_string(),
 990       resolved_method->signature()->as_C_string()
 991     );
 992     return NULL;
 993   }
 994 
 995   // check if invokespecial's interface method reference is in an indirect superinterface
 996   KlassHandle current_klass = link_info.current_klass();
 997   if (!current_klass.is_null() && resolved_klass->is_interface()) {
 998     Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
 999                                   current_klass() :
1000                                   InstanceKlass::cast(current_klass())->host_klass();
1001     // Disable verification for the dynamically-generated reflection bytecodes.
1002     bool is_reflect = klass_to_check->is_subclass_of(
1003                         SystemDictionary::reflect_MagicAccessorImpl_klass());
1004 
1005     if (!is_reflect &&
1006         !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
1007       ResourceMark rm(THREAD);
1008       char buf[200];
1009       jio_snprintf(buf, sizeof(buf),
1010                    "Interface method reference: %s, is in an indirect superinterface of %s",
1011                    Method::name_and_sig_as_C_string(resolved_klass(),
1012                                                          resolved_method->name(),
1013                                                          resolved_method->signature()),
1014                    current_klass->external_name());
1015       THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1016     }
1017   }
1018 
1019   // check if not static
1020   if (resolved_method->is_static()) {
1021     ResourceMark rm(THREAD);
1022     char buf[200];
1023     jio_snprintf(buf, sizeof(buf),
1024                  "Expecting non-static method %s",
1025                  Method::name_and_sig_as_C_string(resolved_klass(),
1026                                                   resolved_method->name(),
1027                                                   resolved_method->signature()));
1028     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1029   }
1030 
1031   if (TraceItables && Verbose) {
1032     trace_method_resolution("invokespecial resolved method: caller-class:",
1033                             current_klass, resolved_klass, resolved_method);
1034     tty->cr();
1035   }
1036 
1037   return resolved_method;
1038 }
1039 
1040 // throws runtime exceptions
1041 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1042                                                   const methodHandle& resolved_method,
1043                                                   KlassHandle resolved_klass,
1044                                                   KlassHandle current_klass,
1045                                                   bool check_access, TRAPS) {
1046 
1047   // resolved method is selected method unless we have an old-style lookup
1048   // for a superclass method
1049   // Invokespecial for a superinterface, resolved method is selected method,
1050   // no checks for shadowing
1051   methodHandle sel_method(THREAD, resolved_method());
1052 
1053   // check if this is an old-style super call and do a new lookup if so
1054   { KlassHandle method_klass  = KlassHandle(THREAD,
1055                                             resolved_method->method_holder());
1056 
1057     if (check_access &&
1058         // a) check if ACC_SUPER flag is set for the current class
1059         (current_klass->is_super() || !AllowNonVirtualCalls) &&
1060         // b) check if the class of the resolved_klass is a superclass
1061         // (not supertype in order to exclude interface classes) of the current class.
1062         // This check is not performed for super.invoke for interface methods
1063         // in super interfaces.
1064         current_klass->is_subclass_of(resolved_klass()) &&
1065         current_klass() != resolved_klass() &&
1066         // c) check if the method is not <init>
1067         resolved_method->name() != vmSymbols::object_initializer_name()) {
1068       // Lookup super method
1069       KlassHandle super_klass(THREAD, current_klass->super());
1070       sel_method = lookup_instance_method_in_klasses(super_klass,
1071                            resolved_method->name(),
1072                            resolved_method->signature(), CHECK);
1073       // check if found
1074       if (sel_method.is_null()) {
1075         ResourceMark rm(THREAD);
1076         THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1077                   Method::name_and_sig_as_C_string(resolved_klass(),
1078                                             resolved_method->name(),
1079                                             resolved_method->signature()));
1080       }
1081     }
1082   }
1083 
1084   // check if not static
1085   if (sel_method->is_static()) {
1086     ResourceMark rm(THREAD);
1087     char buf[200];
1088     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1089                                                                                                              resolved_method->name(),
1090                                                                                                              resolved_method->signature()));
1091     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1092   }
1093 
1094   // check if abstract
1095   if (sel_method->is_abstract()) {
1096     ResourceMark rm(THREAD);
1097     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1098               Method::name_and_sig_as_C_string(resolved_klass(),
1099                                                sel_method->name(),
1100                                                sel_method->signature()));
1101   }
1102 
1103   if (TraceItables && Verbose) {
1104     trace_method_resolution("invokespecial selected method: resolved-class:",
1105                             resolved_klass, resolved_klass, sel_method);
1106     tty->cr();
1107   }
1108 
1109   // setup result
1110   result.set_static(resolved_klass, sel_method, CHECK);
1111 }
1112 
1113 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass,
1114                                         const LinkInfo& link_info,
1115                                         bool check_null_and_abstract, TRAPS) {
1116   methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1117   runtime_resolve_virtual_method(result, resolved_method,
1118                                  link_info.resolved_klass(),
1119                                  recv, receiver_klass,
1120                                  check_null_and_abstract, CHECK);
1121 }
1122 
1123 // throws linktime exceptions
1124 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1125                                                            TRAPS) {
1126   // normal method resolution
1127   methodHandle resolved_method = resolve_method(link_info, /*require_methodref*/true, CHECK_NULL);
1128 
1129   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1130   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1131 
1132   // check if private interface method
1133   KlassHandle resolved_klass = link_info.resolved_klass();
1134   KlassHandle current_klass = link_info.current_klass();
1135 
1136   if (resolved_klass->is_interface() && resolved_method->is_private()) {
1137     ResourceMark rm(THREAD);
1138     char buf[200];
1139     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1140                  Method::name_and_sig_as_C_string(resolved_klass(),
1141                                                   resolved_method->name(),
1142                                                   resolved_method->signature()),
1143                    (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1144     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1145   }
1146 
1147   // check if not static
1148   if (resolved_method->is_static()) {
1149     ResourceMark rm(THREAD);
1150     char buf[200];
1151     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1152                                                                                                              resolved_method->name(),
1153                                                                                                              resolved_method->signature()));
1154     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1155   }
1156 
1157   if (PrintVtables && Verbose) {
1158     trace_method_resolution("invokevirtual resolved method: caller-class:",
1159                             current_klass, resolved_klass, resolved_method);
1160     tty->cr();
1161   }
1162 
1163   return resolved_method;
1164 }
1165 
1166 // throws runtime exceptions
1167 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1168                                                   const methodHandle& resolved_method,
1169                                                   KlassHandle resolved_klass,
1170                                                   Handle recv,
1171                                                   KlassHandle recv_klass,
1172                                                   bool check_null_and_abstract,
1173                                                   TRAPS) {
1174 
1175   // setup default return values
1176   int vtable_index = Method::invalid_vtable_index;
1177   methodHandle selected_method;
1178 
1179   assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1180 
1181   // runtime method resolution
1182   if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1183     THROW(vmSymbols::java_lang_NullPointerException());
1184   }
1185 
1186   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1187   // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1188   // a missing receiver might result in a bogus lookup.
1189   assert(resolved_method->method_holder()->is_linked(), "must be linked");
1190 
1191   // do lookup based on receiver klass using the vtable index
1192   if (resolved_method->method_holder()->is_interface()) { // miranda method
1193     vtable_index = vtable_index_of_interface_method(resolved_klass,
1194                            resolved_method);
1195     assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1196 
1197     InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1198     selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1199   } else {
1200     // at this point we are sure that resolved_method is virtual and not
1201     // a miranda method; therefore, it must have a valid vtable index.
1202     assert(!resolved_method->has_itable_index(), "");
1203     vtable_index = resolved_method->vtable_index();
1204     // We could get a negative vtable_index for final methods,
1205     // because as an optimization they are they are never put in the vtable,
1206     // unless they override an existing method.
1207     // If we do get a negative, it means the resolved method is the the selected
1208     // method, and it can never be changed by an override.
1209     if (vtable_index == Method::nonvirtual_vtable_index) {
1210       assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1211       selected_method = resolved_method;
1212     } else {
1213       // recv_klass might be an arrayKlassOop but all vtables start at
1214       // the same place. The cast is to avoid virtual call and assertion.
1215       InstanceKlass* inst = (InstanceKlass*)recv_klass();
1216       selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1217     }
1218   }
1219 
1220   // check if method exists
1221   if (selected_method.is_null()) {
1222     ResourceMark rm(THREAD);
1223     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1224               Method::name_and_sig_as_C_string(resolved_klass(),
1225                                                       resolved_method->name(),
1226                                                       resolved_method->signature()));
1227   }
1228 
1229   // check if abstract
1230   if (check_null_and_abstract && selected_method->is_abstract()) {
1231     ResourceMark rm(THREAD);
1232     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1233               Method::name_and_sig_as_C_string(resolved_klass(),
1234                                                       selected_method->name(),
1235                                                       selected_method->signature()));
1236   }
1237 
1238   if (PrintVtables && Verbose) {
1239     trace_method_resolution("invokevirtual selected method: receiver-class:",
1240                             recv_klass, resolved_klass, selected_method);
1241     tty->print_cr("vtable_index:%d", vtable_index);
1242   }
1243   // setup result
1244   result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1245 }
1246 
1247 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass,
1248                                           const LinkInfo& link_info,
1249                                           bool check_null_and_abstract, TRAPS) {
1250   // throws linktime exceptions
1251   methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1252   runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1253                                    recv, recv_klass, check_null_and_abstract, CHECK);
1254 }
1255 
1256 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1257                                                              TRAPS) {
1258   // normal interface method resolution
1259   methodHandle resolved_method = resolve_interface_method(link_info, true, CHECK_NULL);
1260   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1261   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1262 
1263   return resolved_method;
1264 }
1265 
1266 // throws runtime exceptions
1267 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1268                                                     const methodHandle& resolved_method,
1269                                                     KlassHandle resolved_klass,
1270                                                     Handle recv,
1271                                                     KlassHandle recv_klass,
1272                                                     bool check_null_and_abstract, TRAPS) {
1273   // check if receiver exists
1274   if (check_null_and_abstract && recv.is_null()) {
1275     THROW(vmSymbols::java_lang_NullPointerException());
1276   }
1277 
1278   // check if private interface method
1279   if (resolved_klass->is_interface() && resolved_method->is_private()) {
1280     ResourceMark rm(THREAD);
1281     char buf[200];
1282     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1283                  Method::name_and_sig_as_C_string(resolved_klass(),
1284                                                   resolved_method->name(),
1285                                                   resolved_method->signature()));
1286     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1287   }
1288 
1289   // check if receiver klass implements the resolved interface
1290   if (!recv_klass->is_subtype_of(resolved_klass())) {
1291     ResourceMark rm(THREAD);
1292     char buf[200];
1293     jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1294                  recv_klass()->external_name(),
1295                  resolved_klass()->external_name());
1296     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1297   }
1298 
1299   // do lookup based on receiver klass
1300   // This search must match the linktime preparation search for itable initialization
1301   // to correctly enforce loader constraints for interface method inheritance
1302   methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass,
1303                                                   resolved_method->name(),
1304                                                   resolved_method->signature(), CHECK);
1305   if (sel_method.is_null() && !check_null_and_abstract) {
1306     // In theory this is a harmless placeholder value, but
1307     // in practice leaving in null affects the nsk default method tests.
1308     // This needs further study.
1309     sel_method = resolved_method;
1310   }
1311   // check if method exists
1312   if (sel_method.is_null()) {
1313     ResourceMark rm(THREAD);
1314     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1315                    Method::name_and_sig_as_C_string(recv_klass(),
1316                                                     resolved_method->name(),
1317                                                     resolved_method->signature()));
1318   }
1319   // check access
1320   // Throw Illegal Access Error if sel_method is not public.
1321   if (!sel_method->is_public()) {
1322     ResourceMark rm(THREAD);
1323     THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1324               Method::name_and_sig_as_C_string(recv_klass(),
1325                                                sel_method->name(),
1326                                                sel_method->signature()));
1327   }
1328   // check if abstract
1329   if (check_null_and_abstract && sel_method->is_abstract()) {
1330     ResourceMark rm(THREAD);
1331     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1332               Method::name_and_sig_as_C_string(recv_klass(),
1333                                                       sel_method->name(),
1334                                                       sel_method->signature()));
1335   }
1336 
1337   if (TraceItables && Verbose) {
1338     trace_method_resolution("invokeinterface selected method: receiver-class",
1339                             recv_klass, resolved_klass, sel_method);
1340     tty->cr();
1341   }
1342   // setup result
1343   if (!resolved_method->has_itable_index()) {
1344     int vtable_index = resolved_method->vtable_index();
1345     assert(vtable_index == sel_method->vtable_index(), "sanity check");
1346     result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1347   } else {
1348     int itable_index = resolved_method()->itable_index();
1349     result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1350   }
1351 }
1352 
1353 
1354 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1355                                                  const LinkInfo& link_info) {
1356   EXCEPTION_MARK;
1357   methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1358   if (HAS_PENDING_EXCEPTION) {
1359     CLEAR_PENDING_EXCEPTION;
1360     return methodHandle();
1361   } else {
1362     return method_result;
1363   }
1364 }
1365 
1366 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1367                                                  const LinkInfo& link_info) {
1368   EXCEPTION_MARK;
1369   methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1370   if (HAS_PENDING_EXCEPTION) {
1371     CLEAR_PENDING_EXCEPTION;
1372     return methodHandle();
1373   } else {
1374     return method_result;
1375   }
1376 }
1377 
1378 methodHandle LinkResolver::resolve_virtual_call_or_null(
1379                                                  KlassHandle receiver_klass,
1380                                                  const LinkInfo& link_info) {
1381   EXCEPTION_MARK;
1382   CallInfo info;
1383   resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1384   if (HAS_PENDING_EXCEPTION) {
1385     CLEAR_PENDING_EXCEPTION;
1386     return methodHandle();
1387   }
1388   return info.selected_method();
1389 }
1390 
1391 methodHandle LinkResolver::resolve_interface_call_or_null(
1392                                                  KlassHandle receiver_klass,
1393                                                  const LinkInfo& link_info) {
1394   EXCEPTION_MARK;
1395   CallInfo info;
1396   resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1397   if (HAS_PENDING_EXCEPTION) {
1398     CLEAR_PENDING_EXCEPTION;
1399     return methodHandle();
1400   }
1401   return info.selected_method();
1402 }
1403 
1404 int LinkResolver::resolve_virtual_vtable_index(KlassHandle receiver_klass,
1405                                                const LinkInfo& link_info) {
1406   EXCEPTION_MARK;
1407   CallInfo info;
1408   resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1409                        /*check_null_or_abstract*/false, THREAD);
1410   if (HAS_PENDING_EXCEPTION) {
1411     CLEAR_PENDING_EXCEPTION;
1412     return Method::invalid_vtable_index;
1413   }
1414   return info.vtable_index();
1415 }
1416 
1417 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1418   EXCEPTION_MARK;
1419   CallInfo info;
1420   resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1421   if (HAS_PENDING_EXCEPTION) {
1422     CLEAR_PENDING_EXCEPTION;
1423     return methodHandle();
1424   }
1425   return info.selected_method();
1426 }
1427 
1428 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1429   EXCEPTION_MARK;
1430   CallInfo info;
1431   resolve_special_call(info, link_info, THREAD);
1432   if (HAS_PENDING_EXCEPTION) {
1433     CLEAR_PENDING_EXCEPTION;
1434     return methodHandle();
1435   }
1436   return info.selected_method();
1437 }
1438 
1439 
1440 
1441 //------------------------------------------------------------------------------------------------------------------------
1442 // ConstantPool entries
1443 
1444 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1445   switch (byte) {
1446     case Bytecodes::_invokestatic   : resolve_invokestatic   (result,       pool, index, CHECK); break;
1447     case Bytecodes::_invokespecial  : resolve_invokespecial  (result,       pool, index, CHECK); break;
1448     case Bytecodes::_invokevirtual  : resolve_invokevirtual  (result, recv, pool, index, CHECK); break;
1449     case Bytecodes::_invokehandle   : resolve_invokehandle   (result,       pool, index, CHECK); break;
1450     case Bytecodes::_invokedynamic  : resolve_invokedynamic  (result,       pool, index, CHECK); break;
1451     case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1452   }
1453   return;
1454 }
1455 
1456 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1457   LinkInfo link_info(pool, index, CHECK);
1458   resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1459 }
1460 
1461 
1462 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1463   LinkInfo link_info(pool, index, CHECK);
1464   resolve_special_call(result, link_info, CHECK);
1465 }
1466 
1467 
1468 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1469                                           constantPoolHandle pool, int index,
1470                                           TRAPS) {
1471 
1472   LinkInfo link_info(pool, index, CHECK);
1473   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1474   resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1475 }
1476 
1477 
1478 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1479   LinkInfo link_info(pool, index, CHECK);
1480   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1481   resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1482 }
1483 
1484 
1485 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1486   // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1487   LinkInfo link_info(pool, index, CHECK);
1488   if (TraceMethodHandles) {
1489     ResourceMark rm(THREAD);
1490     tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1491                   link_info.signature()->as_C_string());
1492   }
1493   resolve_handle_call(result, link_info, CHECK);
1494 }
1495 
1496 void LinkResolver::resolve_handle_call(CallInfo& result,
1497                                        const LinkInfo& link_info,
1498                                        TRAPS) {
1499   // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1500   assert(link_info.resolved_klass()() == SystemDictionary::MethodHandle_klass(), "");
1501   assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1502   Handle       resolved_appendix;
1503   Handle       resolved_method_type;
1504   methodHandle resolved_method = lookup_polymorphic_method(link_info,
1505                                        &resolved_appendix, &resolved_method_type, CHECK);
1506   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1507 }
1508 
1509 static void wrap_invokedynamic_exception(TRAPS) {
1510   if (HAS_PENDING_EXCEPTION) {
1511     if (TraceMethodHandles) {
1512       tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1513       PENDING_EXCEPTION->print();
1514     }
1515     if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1516       // throw these guys, since they are already wrapped
1517       return;
1518     }
1519     if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1520       // intercept only LinkageErrors which might have failed to wrap
1521       return;
1522     }
1523     // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1524     Handle nested_exception(THREAD, PENDING_EXCEPTION);
1525     CLEAR_PENDING_EXCEPTION;
1526     THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1527   }
1528 }
1529 
1530 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1531   Symbol* method_name       = pool->name_ref_at(index);
1532   Symbol* method_signature  = pool->signature_ref_at(index);
1533   KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1534 
1535   // Resolve the bootstrap specifier (BSM + optional arguments).
1536   Handle bootstrap_specifier;
1537   // Check if CallSite has been bound already:
1538   ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1539   if (cpce->is_f1_null()) {
1540     int pool_index = cpce->constant_pool_index();
1541     oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1542     wrap_invokedynamic_exception(CHECK);
1543     assert(bsm_info != NULL, "");
1544     // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1545     bootstrap_specifier = Handle(THREAD, bsm_info);
1546   }
1547   if (!cpce->is_f1_null()) {
1548     methodHandle method(     THREAD, cpce->f1_as_method());
1549     Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
1550     Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
1551     result.set_handle(method, appendix, method_type, THREAD);
1552     wrap_invokedynamic_exception(CHECK);
1553     return;
1554   }
1555 
1556   if (TraceMethodHandles) {
1557       ResourceMark rm(THREAD);
1558       tty->print_cr("resolve_invokedynamic #%d %s %s",
1559                   ConstantPool::decode_invokedynamic_index(index),
1560                   method_name->as_C_string(), method_signature->as_C_string());
1561     tty->print("  BSM info: "); bootstrap_specifier->print();
1562   }
1563 
1564   resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1565 }
1566 
1567 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1568                                         Handle bootstrap_specifier,
1569                                         Symbol* method_name, Symbol* method_signature,
1570                                         KlassHandle current_klass,
1571                                         TRAPS) {
1572   // JSR 292:  this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1573   // The appendix argument is likely to be a freshly-created CallSite.
1574   Handle       resolved_appendix;
1575   Handle       resolved_method_type;
1576   methodHandle resolved_method =
1577     SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1578                                                      bootstrap_specifier,
1579                                                      method_name, method_signature,
1580                                                      &resolved_appendix,
1581                                                      &resolved_method_type,
1582                                                      THREAD);
1583   wrap_invokedynamic_exception(CHECK);
1584   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1585   wrap_invokedynamic_exception(CHECK);
1586 }
1587 
1588 #ifndef PRODUCT
1589 void LinkResolver::trace_method_resolution(const char* prefix,
1590                                            KlassHandle klass,
1591                                            KlassHandle resolved_klass,
1592                                            const methodHandle& method) {
1593   ResourceMark rm;
1594   tty->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1595              prefix,
1596              (klass.is_null() ? "<NULL>" : klass->internal_name()),
1597              (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1598              Method::name_and_sig_as_C_string(resolved_klass(),
1599                                               method->name(),
1600                                               method->signature()),
1601              method->method_holder()->internal_name()
1602              );
1603   method->access_flags().print_on(tty);
1604   if (method->is_default_method()) {
1605     tty->print("default ");
1606   }
1607   if (method->is_overpass()) {
1608     tty->print("overpass ");
1609   }
1610 }
1611 #endif // PRODUCT
--- EOF ---