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/symbolTable.hpp"
  28 #include "classfile/systemDictionary.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "compiler/compileBroker.hpp"
  31 #include "gc/shared/collectedHeap.inline.hpp"
  32 #include "interpreter/bytecode.hpp"
  33 #include "interpreter/interpreterRuntime.hpp"
  34 #include "interpreter/linkResolver.hpp"
  35 #include "logging/log.hpp"
  36 #include "memory/resourceArea.hpp"
  37 #include "memory/universe.inline.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/method.hpp"
  40 #include "oops/objArrayOop.hpp"
  41 #include "oops/oop.inline.hpp"
  42 #include "prims/methodHandles.hpp"
  43 #include "prims/nativeLookup.hpp"
  44 #include "runtime/compilationPolicy.hpp"
  45 #include "runtime/fieldDescriptor.hpp"
  46 #include "runtime/frame.inline.hpp"
  47 #include "runtime/handles.inline.hpp"
  48 #include "runtime/reflection.hpp"
  49 #include "runtime/signature.hpp"
  50 #include "runtime/thread.inline.hpp"
  51 #include "runtime/vmThread.hpp"
  52 
  53 
  54 //------------------------------------------------------------------------------------------------------------------------
  55 // Implementation of CallInfo
  56 
  57 
  58 void CallInfo::set_static(KlassHandle resolved_klass, const methodHandle& resolved_method, TRAPS) {
  59   int vtable_index = Method::nonvirtual_vtable_index;
  60   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
  61 }
  62 
  63 
  64 void CallInfo::set_interface(KlassHandle resolved_klass,
  65                              KlassHandle selected_klass,
  66                              const methodHandle& resolved_method,
  67                              const methodHandle& selected_method,
  68                              int itable_index, TRAPS) {
  69   // This is only called for interface methods. If the resolved_method
  70   // comes from java/lang/Object, it can be the subject of a virtual call, so
  71   // we should pick the vtable index from the resolved method.
  72   // In that case, the caller must call set_virtual instead of set_interface.
  73   assert(resolved_method->method_holder()->is_interface(), "");
  74   assert(itable_index == resolved_method()->itable_index(), "");
  75   set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
  76 }
  77 
  78 void CallInfo::set_virtual(KlassHandle resolved_klass,
  79                            KlassHandle selected_klass,
  80                            const methodHandle& resolved_method,
  81                            const methodHandle& selected_method,
  82                            int vtable_index, TRAPS) {
  83   assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
  84   assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
  85   CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
  86   set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
  87   assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
  88 }
  89 
  90 void CallInfo::set_handle(const methodHandle& resolved_method,
  91                           Handle resolved_appendix,
  92                           Handle resolved_method_type, TRAPS) {
  93   if (resolved_method.is_null()) {
  94     THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
  95   }
  96   KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
  97   assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
  98          resolved_method->is_compiled_lambda_form(),
  99          "linkMethod must return one of these");
 100   int vtable_index = Method::nonvirtual_vtable_index;
 101   assert(!resolved_method->has_vtable_index(), "");
 102   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
 103   _resolved_appendix    = resolved_appendix;
 104   _resolved_method_type = resolved_method_type;
 105 }
 106 
 107 void CallInfo::set_common(KlassHandle resolved_klass,
 108                           KlassHandle selected_klass,
 109                           const methodHandle& resolved_method,
 110                           const methodHandle& selected_method,
 111                           CallKind kind,
 112                           int index,
 113                           TRAPS) {
 114   assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
 115   _resolved_klass  = resolved_klass;
 116   _selected_klass  = selected_klass;
 117   _resolved_method = resolved_method;
 118   _selected_method = selected_method;
 119   _call_kind       = kind;
 120   _call_index      = index;
 121   _resolved_appendix = Handle();
 122   DEBUG_ONLY(verify());  // verify before making side effects
 123 
 124   if (CompilationPolicy::must_be_compiled(selected_method)) {
 125     // This path is unusual, mostly used by the '-Xcomp' stress test mode.
 126 
 127     // Note: with several active threads, the must_be_compiled may be true
 128     //       while can_be_compiled is false; remove assert
 129     // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
 130     if (!THREAD->can_call_java()) {
 131       // don't force compilation, resolve was on behalf of compiler
 132       return;
 133     }
 134     if (selected_method->method_holder()->is_not_initialized()) {
 135       // 'is_not_initialized' means not only '!is_initialized', but also that
 136       // initialization has not been started yet ('!being_initialized')
 137       // Do not force compilation of methods in uninitialized classes.
 138       // Note that doing this would throw an assert later,
 139       // in CompileBroker::compile_method.
 140       // We sometimes use the link resolver to do reflective lookups
 141       // even before classes are initialized.
 142       return;
 143     }
 144     CompileBroker::compile_method(selected_method, InvocationEntryBci,
 145                                   CompilationPolicy::policy()->initial_compile_level(),
 146                                   methodHandle(), 0, "must_be_compiled", CHECK);
 147   }
 148 }
 149 
 150 // utility query for unreflecting a method
 151 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
 152   Klass* resolved_method_holder = resolved_method->method_holder();
 153   if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
 154     resolved_klass = resolved_method_holder;
 155   }
 156   _resolved_klass  = resolved_klass;
 157   _selected_klass  = resolved_klass;
 158   _resolved_method = resolved_method;
 159   _selected_method = resolved_method;
 160   // classify:
 161   CallKind kind = CallInfo::unknown_kind;
 162   int index = resolved_method->vtable_index();
 163   if (resolved_method->can_be_statically_bound()) {
 164     kind = CallInfo::direct_call;
 165   } else if (!resolved_method_holder->is_interface()) {
 166     // Could be an Object method inherited into an interface, but still a vtable call.
 167     kind = CallInfo::vtable_call;
 168   } else if (!resolved_klass->is_interface()) {
 169     // A default or miranda method.  Compute the vtable index.
 170     ResourceMark rm;
 171     klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
 172     index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
 173                            resolved_method);
 174     assert(index >= 0 , "we should have valid vtable index at this point");
 175 
 176     kind = CallInfo::vtable_call;
 177   } else if (resolved_method->has_vtable_index()) {
 178     // Can occur if an interface redeclares a method of Object.
 179 
 180 #ifdef ASSERT
 181     // Ensure that this is really the case.
 182     KlassHandle object_klass = SystemDictionary::Object_klass();
 183     Method * object_resolved_method = object_klass()->vtable()->method_at(index);
 184     assert(object_resolved_method->name() == resolved_method->name(),
 185       "Object and interface method names should match at vtable index %d, %s != %s",
 186       index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
 187     assert(object_resolved_method->signature() == resolved_method->signature(),
 188       "Object and interface method signatures should match at vtable index %d, %s != %s",
 189       index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
 190 #endif // ASSERT
 191 
 192     kind = CallInfo::vtable_call;
 193   } else {
 194     // A regular interface call.
 195     kind = CallInfo::itable_call;
 196     index = resolved_method->itable_index();
 197   }
 198   assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
 199   _call_kind  = kind;
 200   _call_index = index;
 201   _resolved_appendix = Handle();
 202   DEBUG_ONLY(verify());
 203 }
 204 
 205 #ifdef ASSERT
 206 void CallInfo::verify() {
 207   switch (call_kind()) {  // the meaning and allowed value of index depends on kind
 208   case CallInfo::direct_call:
 209     if (_call_index == Method::nonvirtual_vtable_index)  break;
 210     // else fall through to check vtable index:
 211   case CallInfo::vtable_call:
 212     assert(resolved_klass()->verify_vtable_index(_call_index), "");
 213     break;
 214   case CallInfo::itable_call:
 215     assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
 216     break;
 217   case CallInfo::unknown_kind:
 218     assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
 219     break;
 220   default:
 221     fatal("Unexpected call kind %d", call_kind());
 222   }
 223 }
 224 #endif //ASSERT
 225 
 226 #ifndef PRODUCT
 227 void CallInfo::print() {
 228   ResourceMark rm;
 229   const char* kindstr = "unknown";
 230   switch (_call_kind) {
 231   case direct_call: kindstr = "direct"; break;
 232   case vtable_call: kindstr = "vtable"; break;
 233   case itable_call: kindstr = "itable"; break;
 234   }
 235   tty->print_cr("Call %s@%d %s", kindstr, _call_index,
 236                 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
 237 }
 238 #endif
 239 
 240 //------------------------------------------------------------------------------------------------------------------------
 241 // Implementation of LinkInfo
 242 
 243 LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
 244    // resolve klass
 245   Klass* result = pool->klass_ref_at(index, CHECK);
 246   _resolved_klass = KlassHandle(THREAD, result);
 247 
 248   // Get name, signature, and static klass
 249   _name          = pool->name_ref_at(index);
 250   _signature     = pool->signature_ref_at(index);
 251   _current_klass = KlassHandle(THREAD, pool->pool_holder());
 252 
 253   // Coming from the constant pool always checks access
 254   _check_access  = true;
 255 }
 256 
 257 char* LinkInfo::method_string() const {
 258   return Method::name_and_sig_as_C_string(_resolved_klass(), _name, _signature);
 259 }
 260 
 261 #ifndef PRODUCT
 262 void LinkInfo::print() {
 263   ResourceMark rm;
 264   tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
 265                 _resolved_klass->name()->as_C_string(),
 266                 _name->as_C_string(),
 267                 _signature->as_C_string(),
 268                 _current_klass.is_null() ? "(none)" : _current_klass->name()->as_C_string(),
 269                 _check_access ? "true" : "false");
 270 }
 271 #endif // PRODUCT
 272 //------------------------------------------------------------------------------------------------------------------------
 273 // Klass resolution
 274 
 275 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
 276   if (!Reflection::verify_class_access(ref_klass(),
 277                                        sel_klass(),
 278                                        true)) {
 279     ResourceMark rm(THREAD);
 280     Exceptions::fthrow(
 281       THREAD_AND_LOCATION,
 282       vmSymbols::java_lang_IllegalAccessError(),
 283       "tried to access class %s from class %s",
 284       sel_klass->external_name(),
 285       ref_klass->external_name()
 286     );
 287     return;
 288   }
 289 }
 290 
 291 //------------------------------------------------------------------------------------------------------------------------
 292 // Method resolution
 293 //
 294 // According to JVM spec. $5.4.3c & $5.4.3d
 295 
 296 // Look up method in klasses, including static methods
 297 // Then look up local default methods
 298 methodHandle LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
 299                                                     bool checkpolymorphism,
 300                                                     bool in_imethod_resolve, TRAPS) {
 301   KlassHandle klass = link_info.resolved_klass();
 302   Symbol* name = link_info.name();
 303   Symbol* signature = link_info.signature();
 304 
 305   // Ignore overpasses so statics can be found during resolution
 306   Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);
 307 
 308   if (klass->is_array_klass()) {
 309     // Only consider klass and super klass for arrays
 310     return methodHandle(THREAD, result);
 311   }
 312 
 313   InstanceKlass* ik = InstanceKlass::cast(klass());
 314 
 315   // JDK 8, JVMS 5.4.3.4: Interface method resolution should
 316   // ignore static and non-public methods of java.lang.Object,
 317   // like clone, finalize, registerNatives.
 318   if (in_imethod_resolve &&
 319       result != NULL &&
 320       ik->is_interface() &&
 321       (result->is_static() || !result->is_public()) &&
 322       result->method_holder() == SystemDictionary::Object_klass()) {
 323     result = NULL;
 324   }
 325 
 326   // Before considering default methods, check for an overpass in the
 327   // current class if a method has not been found.
 328   if (result == NULL) {
 329     result = ik->find_method(name, signature);
 330   }
 331 
 332   if (result == NULL) {
 333     Array<Method*>* default_methods = ik->default_methods();
 334     if (default_methods != NULL) {
 335       result = InstanceKlass::find_method(default_methods, name, signature);
 336     }
 337   }
 338 
 339   if (checkpolymorphism && result != NULL) {
 340     vmIntrinsics::ID iid = result->intrinsic_id();
 341     if (MethodHandles::is_signature_polymorphic(iid)) {
 342       // Do not link directly to these.  The VM must produce a synthetic one using lookup_polymorphic_method.
 343       return NULL;
 344     }
 345   }
 346   return methodHandle(THREAD, result);
 347 }
 348 
 349 // returns first instance method
 350 // Looks up method in classes, then looks up local default methods
 351 methodHandle LinkResolver::lookup_instance_method_in_klasses(KlassHandle klass,
 352                                                              Symbol* name,
 353                                                              Symbol* signature, TRAPS) {
 354   Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
 355 
 356   while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
 357     Klass* super_klass = result->method_holder()->super();
 358     result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass);
 359   }
 360 
 361   if (klass->is_array_klass()) {
 362     // Only consider klass and super klass for arrays
 363     return methodHandle(THREAD, result);
 364   }
 365 
 366   if (result == NULL) {
 367     Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
 368     if (default_methods != NULL) {
 369       result = InstanceKlass::find_method(default_methods, name, signature);
 370       assert(result == NULL || !result->is_static(), "static defaults not allowed");
 371     }
 372   }
 373   return methodHandle(THREAD, result);
 374 }
 375 
 376 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
 377                                                    const methodHandle& resolved_method) {
 378 
 379   int vtable_index = Method::invalid_vtable_index;
 380   Symbol* name = resolved_method->name();
 381   Symbol* signature = resolved_method->signature();
 382   InstanceKlass* ik = InstanceKlass::cast(klass());
 383 
 384   // First check in default method array
 385   if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
 386     int index = InstanceKlass::find_method_index(ik->default_methods(),
 387                                                  name, signature, Klass::find_overpass,
 388                                                  Klass::find_static, Klass::find_private);
 389     if (index >= 0 ) {
 390       vtable_index = ik->default_vtable_indices()->at(index);
 391     }
 392   }
 393   if (vtable_index == Method::invalid_vtable_index) {
 394     // get vtable_index for miranda methods
 395     ResourceMark rm;
 396     klassVtable *vt = ik->vtable();
 397     vtable_index = vt->index_of_miranda(name, signature);
 398   }
 399   return vtable_index;
 400 }
 401 
 402 methodHandle LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info, TRAPS) {
 403   InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass()());
 404 
 405   // Specify 'true' in order to skip default methods when searching the
 406   // interfaces.  Function lookup_method_in_klasses() already looked for
 407   // the method in the default methods table.
 408   return methodHandle(THREAD,
 409     ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(),
 410     Klass::skip_defaults));
 411 }
 412 
 413 methodHandle LinkResolver::lookup_polymorphic_method(
 414                                              const LinkInfo& link_info,
 415                                              Handle *appendix_result_or_null,
 416                                              Handle *method_type_result,
 417                                              TRAPS) {
 418   KlassHandle klass = link_info.resolved_klass();
 419   Symbol* name = link_info.name();
 420   Symbol* full_signature = link_info.signature();
 421 
 422   vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
 423   if (TraceMethodHandles) {
 424     ResourceMark rm(THREAD);
 425     tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
 426                   vmIntrinsics::name_at(iid), klass->external_name(),
 427                   name->as_C_string(), full_signature->as_C_string());
 428   }
 429   if (klass() == SystemDictionary::MethodHandle_klass() &&
 430       iid != vmIntrinsics::_none) {
 431     if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
 432       // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
 433       // Do not erase last argument type (MemberName) if it is a static linkTo method.
 434       bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
 435       TempNewSymbol basic_signature =
 436         MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
 437       if (TraceMethodHandles) {
 438         ResourceMark rm(THREAD);
 439         tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
 440                       name->as_C_string(),
 441                       full_signature->as_C_string(),
 442                       basic_signature->as_C_string());
 443       }
 444       methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
 445                                                               basic_signature,
 446                                                               CHECK_NULL);
 447       if (result.not_null()) {
 448         assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
 449         assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
 450         assert(basic_signature == result->signature(), "predict the result signature");
 451         if (TraceMethodHandles) {
 452           tty->print("lookup_polymorphic_method => intrinsic ");
 453           result->print_on(tty);
 454         }
 455       }
 456       return result;
 457     } else if (iid == vmIntrinsics::_invokeGeneric
 458                && THREAD->can_call_java()
 459                && appendix_result_or_null != NULL) {
 460       // This is a method with type-checking semantics.
 461       // We will ask Java code to spin an adapter method for it.
 462       if (!MethodHandles::enabled()) {
 463         // Make sure the Java part of the runtime has been booted up.
 464         Klass* natives = SystemDictionary::MethodHandleNatives_klass();
 465         if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
 466           SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
 467                                             Handle(),
 468                                             Handle(),
 469                                             true,
 470                                             CHECK_NULL);
 471         }
 472       }
 473 
 474       Handle appendix;
 475       Handle method_type;
 476       methodHandle result = SystemDictionary::find_method_handle_invoker(
 477                                                             name,
 478                                                             full_signature,
 479                                                             link_info.current_klass(),
 480                                                             &appendix,
 481                                                             &method_type,
 482                                                             CHECK_NULL);
 483       if (TraceMethodHandles) {
 484         tty->print("lookup_polymorphic_method => (via Java) ");
 485         result->print_on(tty);
 486         tty->print("  lookup_polymorphic_method => appendix = ");
 487         if (appendix.is_null())  tty->print_cr("(none)");
 488         else                     appendix->print_on(tty);
 489       }
 490       if (result.not_null()) {
 491 #ifdef ASSERT
 492         ResourceMark rm(THREAD);
 493 
 494         TempNewSymbol basic_signature =
 495           MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
 496         int actual_size_of_params = result->size_of_parameters();
 497         int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
 498         // +1 for MethodHandle.this, +1 for trailing MethodType
 499         if (!MethodHandles::is_signature_polymorphic_static(iid))  expected_size_of_params += 1;
 500         if (appendix.not_null())                                   expected_size_of_params += 1;
 501         if (actual_size_of_params != expected_size_of_params) {
 502           tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
 503           tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
 504           result->print();
 505         }
 506         assert(actual_size_of_params == expected_size_of_params,
 507                "%d != %d", actual_size_of_params, expected_size_of_params);
 508 #endif //ASSERT
 509 
 510         assert(appendix_result_or_null != NULL, "");
 511         (*appendix_result_or_null) = appendix;
 512         (*method_type_result)      = method_type;
 513       }
 514       return result;
 515     }
 516   }
 517   return NULL;
 518 }
 519 
 520 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
 521                                               KlassHandle resolved_klass,
 522                                               KlassHandle sel_klass,
 523                                               const methodHandle& sel_method,
 524                                               TRAPS) {
 525 
 526   AccessFlags flags = sel_method->access_flags();
 527 
 528   // Special case:  arrays always override "clone". JVMS 2.15.
 529   // If the resolved klass is an array class, and the declaring class
 530   // is java.lang.Object and the method is "clone", set the flags
 531   // to public.
 532   //
 533   // We'll check for the method name first, as that's most likely
 534   // to be false (so we'll short-circuit out of these tests).
 535   if (sel_method->name() == vmSymbols::clone_name() &&
 536       sel_klass() == SystemDictionary::Object_klass() &&
 537       resolved_klass->is_array_klass()) {
 538     // We need to change "protected" to "public".
 539     assert(flags.is_protected(), "clone not protected?");
 540     jint new_flags = flags.as_int();
 541     new_flags = new_flags & (~JVM_ACC_PROTECTED);
 542     new_flags = new_flags | JVM_ACC_PUBLIC;
 543     flags.set_flags(new_flags);
 544   }
 545 //  assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
 546 
 547   if (!Reflection::verify_field_access(ref_klass(),
 548                                        resolved_klass(),
 549                                        sel_klass(),
 550                                        flags,
 551                                        true)) {
 552     ResourceMark rm(THREAD);
 553     Exceptions::fthrow(
 554       THREAD_AND_LOCATION,
 555       vmSymbols::java_lang_IllegalAccessError(),
 556       "tried to access method %s.%s%s from class %s",
 557       sel_klass->external_name(),
 558       sel_method->name()->as_C_string(),
 559       sel_method->signature()->as_C_string(),
 560       ref_klass->external_name()
 561     );
 562     return;
 563   }
 564 }
 565 
 566 methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
 567                                                      const constantPoolHandle& pool, int index, TRAPS) {
 568   // This method is used only
 569   // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
 570   // and
 571   // (2) in Bytecode_invoke::static_target
 572   // It appears to fail when applied to an invokeinterface call site.
 573   // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
 574   // resolve klass
 575   KlassHandle resolved_klass;
 576   if (code == Bytecodes::_invokedynamic) {
 577     resolved_klass = SystemDictionary::MethodHandle_klass();
 578     Symbol* method_name = vmSymbols::invoke_name();
 579     Symbol* method_signature = pool->signature_ref_at(index);
 580     KlassHandle  current_klass(THREAD, pool->pool_holder());
 581     LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
 582     return resolve_method(link_info, /*require_methodref*/false, THREAD);
 583   }
 584 
 585   LinkInfo link_info(pool, index, CHECK_NULL);
 586   resolved_klass = link_info.resolved_klass();
 587 
 588   if (pool->has_preresolution()
 589       || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
 590           MethodHandles::is_signature_polymorphic_name(resolved_klass(), link_info.name()))) {
 591     Method* result = ConstantPool::method_at_if_loaded(pool, index);
 592     if (result != NULL) {
 593       return methodHandle(THREAD, result);
 594     }
 595   }
 596 
 597   if (code == Bytecodes::_invokeinterface) {
 598     return resolve_interface_method(link_info, true, THREAD);
 599   } else if (code == Bytecodes::_invokevirtual) {
 600     return resolve_method(link_info, /*require_methodref*/true, THREAD);
 601   } else if (!resolved_klass->is_interface()) {
 602     return resolve_method(link_info, /*require_methodref*/false, THREAD);
 603   } else {
 604     bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
 605     return resolve_interface_method(link_info, nostatics, THREAD);
 606   }
 607 }
 608 
 609 // Check and print a loader constraint violation message for method or interface method
 610 void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
 611                                                    const methodHandle& resolved_method,
 612                                                    const char* method_type, TRAPS) {
 613   Handle current_loader(THREAD, link_info.current_klass()->class_loader());
 614   Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());
 615 
 616   ResourceMark rm(THREAD);
 617   Symbol* failed_type_symbol =
 618     SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
 619                                               resolved_loader, true, CHECK);
 620   if (failed_type_symbol != NULL) {
 621     const char* msg = "loader constraint violation: when resolving %s"
 622       " \"%s\" the class loader (instance of %s) of the current class, %s,"
 623       " and the class loader (instance of %s) for the method's defining class, %s, have"
 624       " different Class objects for the type %s used in the signature";
 625     char* sig = link_info.method_string();
 626     const char* loader1_name = SystemDictionary::loader_name(current_loader());
 627     char* current = link_info.current_klass()->name()->as_C_string();
 628     const char* loader2_name = SystemDictionary::loader_name(resolved_loader());
 629     char* target = resolved_method->method_holder()->name()->as_C_string();
 630     char* failed_type_name = failed_type_symbol->as_C_string();
 631     size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1_name) +
 632       strlen(current) + strlen(loader2_name) + strlen(target) +
 633       strlen(failed_type_name) + strlen(method_type) + 1;
 634     char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
 635     jio_snprintf(buf, buflen, msg, method_type, sig, loader1_name, current, loader2_name,
 636                  target, failed_type_name);
 637     THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
 638   }
 639 }
 640 
 641 void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
 642                                                   KlassHandle current_klass,
 643                                                   KlassHandle sel_klass, TRAPS) {
 644   Handle ref_loader(THREAD, current_klass->class_loader());
 645   Handle sel_loader(THREAD, sel_klass->class_loader());
 646 
 647   ResourceMark rm(THREAD);  // needed for check_signature_loaders
 648   Symbol* failed_type_symbol =
 649     SystemDictionary::check_signature_loaders(sig,
 650                                               ref_loader, sel_loader,
 651                                               false,
 652                                               CHECK);
 653   if (failed_type_symbol != NULL) {
 654     const char* msg = "loader constraint violation: when resolving field"
 655       " \"%s\" the class loader (instance of %s) of the referring class, "
 656       "%s, and the class loader (instance of %s) for the field's resolved "
 657       "type, %s, have different Class objects for that type";
 658     char* field_name = field->as_C_string();
 659     const char* loader1_name = SystemDictionary::loader_name(ref_loader());
 660     char* sel = sel_klass->name()->as_C_string();
 661     const char* loader2_name = SystemDictionary::loader_name(sel_loader());
 662     char* failed_type_name = failed_type_symbol->as_C_string();
 663     size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1_name) +
 664                     strlen(sel) + strlen(loader2_name) + strlen(failed_type_name) + 1;
 665     char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
 666     jio_snprintf(buf, buflen, msg, field_name, loader1_name, sel, loader2_name,
 667                      failed_type_name);
 668     THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
 669   }
 670 }
 671 
 672 methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
 673                                           bool require_methodref, TRAPS) {
 674 
 675   Handle nested_exception;
 676   KlassHandle resolved_klass = link_info.resolved_klass();
 677 
 678   // 1. check if methodref required, that resolved_klass is not interfacemethodref
 679   if (require_methodref && resolved_klass->is_interface()) {
 680     ResourceMark rm(THREAD);
 681     char buf[200];
 682     jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
 683         resolved_klass()->external_name());
 684     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 685   }
 686 
 687   // 2. lookup method in resolved klass and its super klasses
 688   methodHandle resolved_method = lookup_method_in_klasses(link_info, true, false, CHECK_NULL);
 689 
 690   if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
 691     // 3. lookup method in all the interfaces implemented by the resolved klass
 692     resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
 693 
 694     if (resolved_method.is_null()) {
 695       // JSR 292:  see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
 696       resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
 697       if (HAS_PENDING_EXCEPTION) {
 698         nested_exception = Handle(THREAD, PENDING_EXCEPTION);
 699         CLEAR_PENDING_EXCEPTION;
 700       }
 701     }
 702   }
 703 
 704   if (resolved_method.is_null()) {
 705     // 4. method lookup failed
 706     ResourceMark rm(THREAD);
 707     THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
 708                     Method::name_and_sig_as_C_string(resolved_klass(),
 709                                                      link_info.name(),
 710                                                      link_info.signature()),
 711                     nested_exception, NULL);
 712   }
 713 
 714   // 5. access checks, access checking may be turned off when calling from within the VM.
 715   KlassHandle current_klass = link_info.current_klass();
 716   if (link_info.check_access()) {
 717     assert(current_klass.not_null() , "current_klass should not be null");
 718 
 719     // check if method can be accessed by the referring class
 720     check_method_accessability(current_klass,
 721                                resolved_klass,
 722                                KlassHandle(THREAD, resolved_method->method_holder()),
 723                                resolved_method,
 724                                CHECK_NULL);
 725 
 726     // check loader constraints
 727     check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
 728   }
 729 
 730   return resolved_method;
 731 }
 732 
 733 static void trace_method_resolution(const char* prefix,
 734                                     KlassHandle klass,
 735                                     KlassHandle resolved_klass,
 736                                     const methodHandle& method,
 737                                     bool logitables,
 738                                     int index = -1) {
 739 #ifndef PRODUCT
 740   ResourceMark rm;
 741   outputStream* st;
 742   if (logitables) {
 743     st = LogHandle(itables)::trace_stream();
 744   } else {
 745     st = LogHandle(vtables)::trace_stream();
 746   }
 747   st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
 748             prefix,
 749             (klass.is_null() ? "<NULL>" : klass->internal_name()),
 750             (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
 751             Method::name_and_sig_as_C_string(resolved_klass(),
 752                                              method->name(),
 753                                              method->signature()),
 754             method->method_holder()->internal_name());
 755   method->print_linkage_flags(st);
 756   if (index != -1) {
 757     st->print("vtable_index:%d", index);
 758   }
 759   st->cr();
 760 #endif // PRODUCT
 761 }
 762 
 763 methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info,
 764                                                     bool nostatics, TRAPS) {
 765 
 766   KlassHandle resolved_klass = link_info.resolved_klass();
 767 
 768   // check if klass is interface
 769   if (!resolved_klass->is_interface()) {
 770     ResourceMark rm(THREAD);
 771     char buf[200];
 772     jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
 773     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 774   }
 775 
 776   // lookup method in this interface or its super, java.lang.Object
 777   // JDK8: also look for static methods
 778   methodHandle resolved_method = lookup_method_in_klasses(link_info, false, true, CHECK_NULL);
 779 
 780   if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
 781     // lookup method in all the super-interfaces
 782     resolved_method = lookup_method_in_interfaces(link_info, CHECK_NULL);
 783   }
 784 
 785   if (resolved_method.is_null()) {
 786     // no method found
 787     ResourceMark rm(THREAD);
 788     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
 789                    Method::name_and_sig_as_C_string(resolved_klass(),
 790                                                     link_info.name(),
 791                                                     link_info.signature()));
 792   }
 793 
 794   if (link_info.check_access()) {
 795     // JDK8 adds non-public interface methods, and accessability check requirement
 796     KlassHandle current_klass = link_info.current_klass();
 797 
 798     assert(current_klass.not_null() , "current_klass should not be null");
 799 
 800     // check if method can be accessed by the referring class
 801     check_method_accessability(current_klass,
 802                                resolved_klass,
 803                                KlassHandle(THREAD, resolved_method->method_holder()),
 804                                resolved_method,
 805                                CHECK_NULL);
 806 
 807     check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
 808   }
 809 
 810   if (nostatics && resolved_method->is_static()) {
 811     ResourceMark rm(THREAD);
 812     char buf[200];
 813     jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
 814                  Method::name_and_sig_as_C_string(resolved_klass(),
 815                  resolved_method->name(), resolved_method->signature()));
 816     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 817   }
 818 
 819   if (develop_log_is_enabled(Trace, itables)) {
 820     trace_method_resolution("invokeinterface resolved method: caller-class",
 821                             link_info.current_klass(), resolved_klass,
 822                             resolved_method, true);
 823   }
 824 
 825   return resolved_method;
 826 }
 827 
 828 //------------------------------------------------------------------------------------------------------------------------
 829 // Field resolution
 830 
 831 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
 832                                              KlassHandle resolved_klass,
 833                                              KlassHandle sel_klass,
 834                                              const fieldDescriptor& fd,
 835                                              TRAPS) {
 836   if (!Reflection::verify_field_access(ref_klass(),
 837                                        resolved_klass(),
 838                                        sel_klass(),
 839                                        fd.access_flags(),
 840                                        true)) {
 841     ResourceMark rm(THREAD);
 842     Exceptions::fthrow(
 843       THREAD_AND_LOCATION,
 844       vmSymbols::java_lang_IllegalAccessError(),
 845       "tried to access field %s.%s from class %s",
 846       sel_klass->external_name(),
 847       fd.name()->as_C_string(),
 848       ref_klass->external_name()
 849     );
 850     return;
 851   }
 852 }
 853 
 854 void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
 855   LinkInfo link_info(pool, index, CHECK);
 856   resolve_field(fd, link_info, byte, true, CHECK);
 857 }
 858 
 859 void LinkResolver::resolve_field(fieldDescriptor& fd,
 860                                  const LinkInfo& link_info,
 861                                  Bytecodes::Code byte, bool initialize_class,
 862                                  TRAPS) {
 863   assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
 864          byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield  ||
 865          byte == Bytecodes::_nofast_getfield  || byte == Bytecodes::_nofast_putfield  ||
 866          (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");
 867 
 868   bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
 869   bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
 870   // Check if there's a resolved klass containing the field
 871   KlassHandle resolved_klass = link_info.resolved_klass();
 872   Symbol* field = link_info.name();
 873   Symbol* sig = link_info.signature();
 874 
 875   if (resolved_klass.is_null()) {
 876     ResourceMark rm(THREAD);
 877     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
 878   }
 879 
 880   // Resolve instance field
 881   KlassHandle sel_klass(THREAD, resolved_klass->find_field(field, sig, &fd));
 882   // check if field exists; i.e., if a klass containing the field def has been selected
 883   if (sel_klass.is_null()) {
 884     ResourceMark rm(THREAD);
 885     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
 886   }
 887 
 888   if (!link_info.check_access())
 889     // Access checking may be turned off when calling from within the VM.
 890     return;
 891 
 892   // check access
 893   KlassHandle current_klass = link_info.current_klass();
 894   check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
 895 
 896   // check for errors
 897   if (is_static != fd.is_static()) {
 898     ResourceMark rm(THREAD);
 899     char msg[200];
 900     jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
 901     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
 902   }
 903 
 904   // Final fields can only be accessed from its own class.
 905   if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
 906     THROW(vmSymbols::java_lang_IllegalAccessError());
 907   }
 908 
 909   // initialize resolved_klass if necessary
 910   // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
 911   //         according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
 912   //
 913   // note 2: we don't want to force initialization if we are just checking
 914   //         if the field access is legal; e.g., during compilation
 915   if (is_static && initialize_class) {
 916     sel_klass->initialize(CHECK);
 917   }
 918 
 919   if (sel_klass() != current_klass()) {
 920     check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
 921   }
 922 
 923   // return information. note that the klass is set to the actual klass containing the
 924   // field, otherwise access of static fields in superclasses will not work.
 925 }
 926 
 927 
 928 //------------------------------------------------------------------------------------------------------------------------
 929 // Invoke resolution
 930 //
 931 // Naming conventions:
 932 //
 933 // resolved_method    the specified method (i.e., static receiver specified via constant pool index)
 934 // sel_method         the selected method  (selected via run-time lookup; e.g., based on dynamic receiver class)
 935 // resolved_klass     the specified klass  (i.e., specified via constant pool index)
 936 // recv_klass         the receiver klass
 937 
 938 
 939 void LinkResolver::resolve_static_call(CallInfo& result,
 940                                        const LinkInfo& link_info,
 941                                        bool initialize_class, TRAPS) {
 942   methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);
 943 
 944   // The resolved class can change as a result of this resolution.
 945   KlassHandle resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
 946 
 947   Method* save_resolved_method = resolved_method();
 948   // Initialize klass (this should only happen if everything is ok)
 949   if (initialize_class && resolved_klass->should_be_initialized()) {
 950     resolved_klass->initialize(CHECK);
 951     // Use updated LinkInfo (to reresolve with resolved_klass as method_holder?)
 952     LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
 953                       link_info.current_klass(), link_info.check_access());
 954     resolved_method = linktime_resolve_static_method(new_info, CHECK);
 955   }
 956 
 957   assert(save_resolved_method == resolved_method(), "does this change?");
 958   // setup result
 959   result.set_static(resolved_klass, resolved_method, CHECK);
 960 }
 961 
 962 // throws linktime exceptions
 963 methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {
 964 
 965   KlassHandle resolved_klass = link_info.resolved_klass();
 966   methodHandle resolved_method;
 967   if (!resolved_klass->is_interface()) {
 968     resolved_method = resolve_method(link_info, /*require_methodref*/false, CHECK_NULL);
 969   } else {
 970     resolved_method = resolve_interface_method(link_info, /*nostatics*/false, CHECK_NULL);
 971   }
 972   assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
 973 
 974   // check if static
 975   if (!resolved_method->is_static()) {
 976     ResourceMark rm(THREAD);
 977     char buf[200];
 978     jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
 979                                                       resolved_method->name(),
 980                                                       resolved_method->signature()));
 981     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 982   }
 983   return resolved_method;
 984 }
 985 
 986 
 987 void LinkResolver::resolve_special_call(CallInfo& result,
 988                                         const LinkInfo& link_info,
 989                                         TRAPS) {
 990   methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
 991   runtime_resolve_special_method(result, resolved_method,
 992                                  link_info.resolved_klass(),
 993                                  link_info.current_klass(),
 994                                  link_info.check_access(), CHECK);
 995 }
 996 
 997 // throws linktime exceptions
 998 methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
 999                                                            TRAPS) {
1000 
1001   // Invokespecial is called for multiple special reasons:
1002   // <init>
1003   // local private method invocation, for classes and interfaces
1004   // superclass.method, which can also resolve to a default method
1005   // and the selected method is recalculated relative to the direct superclass
1006   // superinterface.method, which explicitly does not check shadowing
1007   KlassHandle resolved_klass = link_info.resolved_klass();
1008   methodHandle resolved_method;
1009 
1010   if (!resolved_klass->is_interface()) {
1011     resolved_method = resolve_method(link_info, /*require_methodref*/false, CHECK_NULL);
1012   } else {
1013     resolved_method = resolve_interface_method(link_info, /*nostatics*/true, CHECK_NULL);
1014   }
1015 
1016   // check if method name is <init>, that it is found in same klass as static type
1017   if (resolved_method->name() == vmSymbols::object_initializer_name() &&
1018       resolved_method->method_holder() != resolved_klass()) {
1019     ResourceMark rm(THREAD);
1020     Exceptions::fthrow(
1021       THREAD_AND_LOCATION,
1022       vmSymbols::java_lang_NoSuchMethodError(),
1023       "%s: method %s%s not found",
1024       resolved_klass->external_name(),
1025       resolved_method->name()->as_C_string(),
1026       resolved_method->signature()->as_C_string()
1027     );
1028     return NULL;
1029   }
1030 
1031   // check if invokespecial's interface method reference is in an indirect superinterface
1032   KlassHandle current_klass = link_info.current_klass();
1033   if (!current_klass.is_null() && resolved_klass->is_interface()) {
1034     Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
1035                                   current_klass() :
1036                                   InstanceKlass::cast(current_klass())->host_klass();
1037     // Disable verification for the dynamically-generated reflection bytecodes.
1038     bool is_reflect = klass_to_check->is_subclass_of(
1039                         SystemDictionary::reflect_MagicAccessorImpl_klass());
1040 
1041     if (!is_reflect &&
1042         !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
1043       ResourceMark rm(THREAD);
1044       char buf[200];
1045       jio_snprintf(buf, sizeof(buf),
1046                    "Interface method reference: %s, is in an indirect superinterface of %s",
1047                    Method::name_and_sig_as_C_string(resolved_klass(),
1048                                                          resolved_method->name(),
1049                                                          resolved_method->signature()),
1050                    current_klass->external_name());
1051       THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1052     }
1053   }
1054 
1055   // check if not static
1056   if (resolved_method->is_static()) {
1057     ResourceMark rm(THREAD);
1058     char buf[200];
1059     jio_snprintf(buf, sizeof(buf),
1060                  "Expecting non-static method %s",
1061                  Method::name_and_sig_as_C_string(resolved_klass(),
1062                                                   resolved_method->name(),
1063                                                   resolved_method->signature()));
1064     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1065   }
1066 
1067   if (develop_log_is_enabled(Trace, itables)) {
1068     trace_method_resolution("invokespecial resolved method: caller-class:",
1069                             current_klass, resolved_klass, resolved_method, true);
1070   }
1071 
1072   return resolved_method;
1073 }
1074 
1075 // throws runtime exceptions
1076 void LinkResolver::runtime_resolve_special_method(CallInfo& result,
1077                                                   const methodHandle& resolved_method,
1078                                                   KlassHandle resolved_klass,
1079                                                   KlassHandle current_klass,
1080                                                   bool check_access, TRAPS) {
1081 
1082   // resolved method is selected method unless we have an old-style lookup
1083   // for a superclass method
1084   // Invokespecial for a superinterface, resolved method is selected method,
1085   // no checks for shadowing
1086   methodHandle sel_method(THREAD, resolved_method());
1087 
1088   // check if this is an old-style super call and do a new lookup if so
1089   { KlassHandle method_klass  = KlassHandle(THREAD,
1090                                             resolved_method->method_holder());
1091 
1092     if (check_access &&
1093         // a) check if ACC_SUPER flag is set for the current class
1094         (current_klass->is_super() || !AllowNonVirtualCalls) &&
1095         // b) check if the class of the resolved_klass is a superclass
1096         // (not supertype in order to exclude interface classes) of the current class.
1097         // This check is not performed for super.invoke for interface methods
1098         // in super interfaces.
1099         current_klass->is_subclass_of(resolved_klass()) &&
1100         current_klass() != resolved_klass() &&
1101         // c) check if the method is not <init>
1102         resolved_method->name() != vmSymbols::object_initializer_name()) {
1103       // Lookup super method
1104       KlassHandle super_klass(THREAD, current_klass->super());
1105       sel_method = lookup_instance_method_in_klasses(super_klass,
1106                            resolved_method->name(),
1107                            resolved_method->signature(), CHECK);
1108       // check if found
1109       if (sel_method.is_null()) {
1110         ResourceMark rm(THREAD);
1111         THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1112                   Method::name_and_sig_as_C_string(resolved_klass(),
1113                                             resolved_method->name(),
1114                                             resolved_method->signature()));
1115       }
1116     }
1117   }
1118 
1119   // check if not static
1120   if (sel_method->is_static()) {
1121     ResourceMark rm(THREAD);
1122     char buf[200];
1123     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1124                                                                                                              resolved_method->name(),
1125                                                                                                              resolved_method->signature()));
1126     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1127   }
1128 
1129   // check if abstract
1130   if (sel_method->is_abstract()) {
1131     ResourceMark rm(THREAD);
1132     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1133               Method::name_and_sig_as_C_string(resolved_klass(),
1134                                                sel_method->name(),
1135                                                sel_method->signature()));
1136   }
1137 
1138   if (develop_log_is_enabled(Trace, itables)) {
1139     trace_method_resolution("invokespecial selected method: resolved-class:",
1140                             resolved_klass, resolved_klass, sel_method, true);
1141   }
1142 
1143   // setup result
1144   result.set_static(resolved_klass, sel_method, CHECK);
1145 }
1146 
1147 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass,
1148                                         const LinkInfo& link_info,
1149                                         bool check_null_and_abstract, TRAPS) {
1150   methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
1151   runtime_resolve_virtual_method(result, resolved_method,
1152                                  link_info.resolved_klass(),
1153                                  recv, receiver_klass,
1154                                  check_null_and_abstract, CHECK);
1155 }
1156 
1157 // throws linktime exceptions
1158 methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
1159                                                            TRAPS) {
1160   // normal method resolution
1161   methodHandle resolved_method = resolve_method(link_info, /*require_methodref*/true, CHECK_NULL);
1162 
1163   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1164   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1165 
1166   // check if private interface method
1167   KlassHandle resolved_klass = link_info.resolved_klass();
1168   KlassHandle current_klass = link_info.current_klass();
1169 
1170   if (resolved_klass->is_interface() && resolved_method->is_private()) {
1171     ResourceMark rm(THREAD);
1172     char buf[200];
1173     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1174                  Method::name_and_sig_as_C_string(resolved_klass(),
1175                                                   resolved_method->name(),
1176                                                   resolved_method->signature()),
1177                    (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1178     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1179   }
1180 
1181   // check if not static
1182   if (resolved_method->is_static()) {
1183     ResourceMark rm(THREAD);
1184     char buf[200];
1185     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1186                                                                                                              resolved_method->name(),
1187                                                                                                              resolved_method->signature()));
1188     THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1189   }
1190 
1191   if (develop_log_is_enabled(Trace, vtables)) {
1192     trace_method_resolution("invokevirtual resolved method: caller-class:",
1193                             current_klass, resolved_klass, resolved_method, false);
1194   }
1195 
1196   return resolved_method;
1197 }
1198 
1199 // throws runtime exceptions
1200 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1201                                                   const methodHandle& resolved_method,
1202                                                   KlassHandle resolved_klass,
1203                                                   Handle recv,
1204                                                   KlassHandle recv_klass,
1205                                                   bool check_null_and_abstract,
1206                                                   TRAPS) {
1207 
1208   // setup default return values
1209   int vtable_index = Method::invalid_vtable_index;
1210   methodHandle selected_method;
1211 
1212   assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1213 
1214   // runtime method resolution
1215   if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1216     THROW(vmSymbols::java_lang_NullPointerException());
1217   }
1218 
1219   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1220   // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1221   // a missing receiver might result in a bogus lookup.
1222   assert(resolved_method->method_holder()->is_linked(), "must be linked");
1223 
1224   // do lookup based on receiver klass using the vtable index
1225   if (resolved_method->method_holder()->is_interface()) { // default or miranda method
1226     vtable_index = vtable_index_of_interface_method(resolved_klass,
1227                            resolved_method);
1228     assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1229 
1230     InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1231     selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1232   } else {
1233     // at this point we are sure that resolved_method is virtual and not
1234     // a default or miranda method; therefore, it must have a valid vtable index.
1235     assert(!resolved_method->has_itable_index(), "");
1236     vtable_index = resolved_method->vtable_index();
1237     // We could get a negative vtable_index for final methods,
1238     // because as an optimization they are they are never put in the vtable,
1239     // unless they override an existing method.
1240     // If we do get a negative, it means the resolved method is the the selected
1241     // method, and it can never be changed by an override.
1242     if (vtable_index == Method::nonvirtual_vtable_index) {
1243       assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1244       selected_method = resolved_method;
1245     } else {
1246       // recv_klass might be an arrayKlassOop but all vtables start at
1247       // the same place. The cast is to avoid virtual call and assertion.
1248       InstanceKlass* inst = (InstanceKlass*)recv_klass();
1249       selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1250     }
1251   }
1252 
1253   // check if method exists
1254   if (selected_method.is_null()) {
1255     ResourceMark rm(THREAD);
1256     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1257               Method::name_and_sig_as_C_string(resolved_klass(),
1258                                                       resolved_method->name(),
1259                                                       resolved_method->signature()));
1260   }
1261 
1262   // check if abstract
1263   if (check_null_and_abstract && selected_method->is_abstract()) {
1264     ResourceMark rm(THREAD);
1265     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1266               Method::name_and_sig_as_C_string(resolved_klass(),
1267                                                       selected_method->name(),
1268                                                       selected_method->signature()));
1269   }
1270 
1271   if (develop_log_is_enabled(Trace, vtables)) {
1272     trace_method_resolution("invokevirtual selected method: receiver-class:",
1273                             recv_klass, resolved_klass, selected_method,
1274                             false, vtable_index);
1275   }
1276   // setup result
1277   result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1278 }
1279 
1280 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass,
1281                                           const LinkInfo& link_info,
1282                                           bool check_null_and_abstract, TRAPS) {
1283   // throws linktime exceptions
1284   methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
1285   runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
1286                                    recv, recv_klass, check_null_and_abstract, CHECK);
1287 }
1288 
1289 methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
1290                                                              TRAPS) {
1291   // normal interface method resolution
1292   methodHandle resolved_method = resolve_interface_method(link_info, true, CHECK_NULL);
1293   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1294   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1295 
1296   return resolved_method;
1297 }
1298 
1299 // throws runtime exceptions
1300 void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
1301                                                     const methodHandle& resolved_method,
1302                                                     KlassHandle resolved_klass,
1303                                                     Handle recv,
1304                                                     KlassHandle recv_klass,
1305                                                     bool check_null_and_abstract, TRAPS) {
1306   // check if receiver exists
1307   if (check_null_and_abstract && recv.is_null()) {
1308     THROW(vmSymbols::java_lang_NullPointerException());
1309   }
1310 
1311   // check if private interface method
1312   if (resolved_klass->is_interface() && resolved_method->is_private()) {
1313     ResourceMark rm(THREAD);
1314     char buf[200];
1315     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1316                  Method::name_and_sig_as_C_string(resolved_klass(),
1317                                                   resolved_method->name(),
1318                                                   resolved_method->signature()));
1319     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1320   }
1321 
1322   // check if receiver klass implements the resolved interface
1323   if (!recv_klass->is_subtype_of(resolved_klass())) {
1324     ResourceMark rm(THREAD);
1325     char buf[200];
1326     jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1327                  recv_klass()->external_name(),
1328                  resolved_klass()->external_name());
1329     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1330   }
1331 
1332   // do lookup based on receiver klass
1333   // This search must match the linktime preparation search for itable initialization
1334   // to correctly enforce loader constraints for interface method inheritance
1335   methodHandle sel_method = lookup_instance_method_in_klasses(recv_klass,
1336                                                   resolved_method->name(),
1337                                                   resolved_method->signature(), CHECK);
1338   if (sel_method.is_null() && !check_null_and_abstract) {
1339     // In theory this is a harmless placeholder value, but
1340     // in practice leaving in null affects the nsk default method tests.
1341     // This needs further study.
1342     sel_method = resolved_method;
1343   }
1344   // check if method exists
1345   if (sel_method.is_null()) {
1346     ResourceMark rm(THREAD);
1347     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1348                    Method::name_and_sig_as_C_string(recv_klass(),
1349                                                     resolved_method->name(),
1350                                                     resolved_method->signature()));
1351   }
1352   // check access
1353   // Throw Illegal Access Error if sel_method is not public.
1354   if (!sel_method->is_public()) {
1355     ResourceMark rm(THREAD);
1356     THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1357               Method::name_and_sig_as_C_string(recv_klass(),
1358                                                sel_method->name(),
1359                                                sel_method->signature()));
1360   }
1361   // check if abstract
1362   if (check_null_and_abstract && sel_method->is_abstract()) {
1363     ResourceMark rm(THREAD);
1364     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1365               Method::name_and_sig_as_C_string(recv_klass(),
1366                                                       sel_method->name(),
1367                                                       sel_method->signature()));
1368   }
1369 
1370   if (develop_log_is_enabled(Trace, itables)) {
1371     trace_method_resolution("invokeinterface selected method: receiver-class",
1372                             recv_klass, resolved_klass, sel_method, true);
1373   }
1374   // setup result
1375   if (!resolved_method->has_itable_index()) {
1376     int vtable_index = resolved_method->vtable_index();
1377     assert(vtable_index == sel_method->vtable_index(), "sanity check");
1378     result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1379   } else {
1380     int itable_index = resolved_method()->itable_index();
1381     result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1382   }
1383 }
1384 
1385 
1386 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1387                                                  const LinkInfo& link_info) {
1388   EXCEPTION_MARK;
1389   methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
1390   if (HAS_PENDING_EXCEPTION) {
1391     CLEAR_PENDING_EXCEPTION;
1392     return methodHandle();
1393   } else {
1394     return method_result;
1395   }
1396 }
1397 
1398 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1399                                                  const LinkInfo& link_info) {
1400   EXCEPTION_MARK;
1401   methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
1402   if (HAS_PENDING_EXCEPTION) {
1403     CLEAR_PENDING_EXCEPTION;
1404     return methodHandle();
1405   } else {
1406     return method_result;
1407   }
1408 }
1409 
1410 methodHandle LinkResolver::resolve_virtual_call_or_null(
1411                                                  KlassHandle receiver_klass,
1412                                                  const LinkInfo& link_info) {
1413   EXCEPTION_MARK;
1414   CallInfo info;
1415   resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1416   if (HAS_PENDING_EXCEPTION) {
1417     CLEAR_PENDING_EXCEPTION;
1418     return methodHandle();
1419   }
1420   return info.selected_method();
1421 }
1422 
1423 methodHandle LinkResolver::resolve_interface_call_or_null(
1424                                                  KlassHandle receiver_klass,
1425                                                  const LinkInfo& link_info) {
1426   EXCEPTION_MARK;
1427   CallInfo info;
1428   resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
1429   if (HAS_PENDING_EXCEPTION) {
1430     CLEAR_PENDING_EXCEPTION;
1431     return methodHandle();
1432   }
1433   return info.selected_method();
1434 }
1435 
1436 int LinkResolver::resolve_virtual_vtable_index(KlassHandle receiver_klass,
1437                                                const LinkInfo& link_info) {
1438   EXCEPTION_MARK;
1439   CallInfo info;
1440   resolve_virtual_call(info, Handle(), receiver_klass, link_info,
1441                        /*check_null_or_abstract*/false, THREAD);
1442   if (HAS_PENDING_EXCEPTION) {
1443     CLEAR_PENDING_EXCEPTION;
1444     return Method::invalid_vtable_index;
1445   }
1446   return info.vtable_index();
1447 }
1448 
1449 methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
1450   EXCEPTION_MARK;
1451   CallInfo info;
1452   resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
1453   if (HAS_PENDING_EXCEPTION) {
1454     CLEAR_PENDING_EXCEPTION;
1455     return methodHandle();
1456   }
1457   return info.selected_method();
1458 }
1459 
1460 methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
1461   EXCEPTION_MARK;
1462   CallInfo info;
1463   resolve_special_call(info, link_info, THREAD);
1464   if (HAS_PENDING_EXCEPTION) {
1465     CLEAR_PENDING_EXCEPTION;
1466     return methodHandle();
1467   }
1468   return info.selected_method();
1469 }
1470 
1471 
1472 
1473 //------------------------------------------------------------------------------------------------------------------------
1474 // ConstantPool entries
1475 
1476 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
1477   switch (byte) {
1478     case Bytecodes::_invokestatic   : resolve_invokestatic   (result,       pool, index, CHECK); break;
1479     case Bytecodes::_invokespecial  : resolve_invokespecial  (result,       pool, index, CHECK); break;
1480     case Bytecodes::_invokevirtual  : resolve_invokevirtual  (result, recv, pool, index, CHECK); break;
1481     case Bytecodes::_invokehandle   : resolve_invokehandle   (result,       pool, index, CHECK); break;
1482     case Bytecodes::_invokedynamic  : resolve_invokedynamic  (result,       pool, index, CHECK); break;
1483     case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1484   }
1485   return;
1486 }
1487 
1488 void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1489   LinkInfo link_info(pool, index, CHECK);
1490   resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
1491 }
1492 
1493 
1494 void LinkResolver::resolve_invokespecial(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1495   LinkInfo link_info(pool, index, CHECK);
1496   resolve_special_call(result, link_info, CHECK);
1497 }
1498 
1499 
1500 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1501                                           const constantPoolHandle& pool, int index,
1502                                           TRAPS) {
1503 
1504   LinkInfo link_info(pool, index, CHECK);
1505   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1506   resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
1507 }
1508 
1509 
1510 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
1511   LinkInfo link_info(pool, index, CHECK);
1512   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1513   resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
1514 }
1515 
1516 
1517 void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1518   // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1519   LinkInfo link_info(pool, index, CHECK);
1520   if (TraceMethodHandles) {
1521     ResourceMark rm(THREAD);
1522     tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
1523                   link_info.signature()->as_C_string());
1524   }
1525   resolve_handle_call(result, link_info, CHECK);
1526 }
1527 
1528 void LinkResolver::resolve_handle_call(CallInfo& result,
1529                                        const LinkInfo& link_info,
1530                                        TRAPS) {
1531   // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1532   assert(link_info.resolved_klass()() == SystemDictionary::MethodHandle_klass(), "");
1533   assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
1534   Handle       resolved_appendix;
1535   Handle       resolved_method_type;
1536   methodHandle resolved_method = lookup_polymorphic_method(link_info,
1537                                        &resolved_appendix, &resolved_method_type, CHECK);
1538   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1539 }
1540 
1541 static void wrap_invokedynamic_exception(TRAPS) {
1542   if (HAS_PENDING_EXCEPTION) {
1543     if (TraceMethodHandles) {
1544       tty->print_cr("invokedynamic throws BSME for " INTPTR_FORMAT, p2i((void *)PENDING_EXCEPTION));
1545       PENDING_EXCEPTION->print();
1546     }
1547     if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1548       // throw these guys, since they are already wrapped
1549       return;
1550     }
1551     if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1552       // intercept only LinkageErrors which might have failed to wrap
1553       return;
1554     }
1555     // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1556     Handle nested_exception(THREAD, PENDING_EXCEPTION);
1557     CLEAR_PENDING_EXCEPTION;
1558     THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1559   }
1560 }
1561 
1562 void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
1563   Symbol* method_name       = pool->name_ref_at(index);
1564   Symbol* method_signature  = pool->signature_ref_at(index);
1565   KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1566 
1567   // Resolve the bootstrap specifier (BSM + optional arguments).
1568   Handle bootstrap_specifier;
1569   // Check if CallSite has been bound already:
1570   ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1571   if (cpce->is_f1_null()) {
1572     int pool_index = cpce->constant_pool_index();
1573     oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
1574     wrap_invokedynamic_exception(CHECK);
1575     assert(bsm_info != NULL, "");
1576     // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1577     bootstrap_specifier = Handle(THREAD, bsm_info);
1578   }
1579   if (!cpce->is_f1_null()) {
1580     methodHandle method(     THREAD, cpce->f1_as_method());
1581     Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
1582     Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
1583     result.set_handle(method, appendix, method_type, THREAD);
1584     wrap_invokedynamic_exception(CHECK);
1585     return;
1586   }
1587 
1588   if (TraceMethodHandles) {
1589       ResourceMark rm(THREAD);
1590       tty->print_cr("resolve_invokedynamic #%d %s %s",
1591                   ConstantPool::decode_invokedynamic_index(index),
1592                   method_name->as_C_string(), method_signature->as_C_string());
1593     tty->print("  BSM info: "); bootstrap_specifier->print();
1594   }
1595 
1596   resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1597 }
1598 
1599 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1600                                         Handle bootstrap_specifier,
1601                                         Symbol* method_name, Symbol* method_signature,
1602                                         KlassHandle current_klass,
1603                                         TRAPS) {
1604   // JSR 292:  this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1605   // The appendix argument is likely to be a freshly-created CallSite.
1606   Handle       resolved_appendix;
1607   Handle       resolved_method_type;
1608   methodHandle resolved_method =
1609     SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1610                                                      bootstrap_specifier,
1611                                                      method_name, method_signature,
1612                                                      &resolved_appendix,
1613                                                      &resolved_method_type,
1614                                                      THREAD);
1615   wrap_invokedynamic_exception(CHECK);
1616   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
1617   wrap_invokedynamic_exception(CHECK);
1618 }