jdk8-mips64-public/hotspot: src/share/vm/interpreter/linkResolver.cpp@ee99e1a7c5fb (annotated)

src/share/vm/interpreter/linkResolver.cpp@ee99e1a7c5fb (annotated)

src/share/vm/interpreter/linkResolver.cpp

Fri, 18 Oct 2013 19:44:40 -0700

author: ccheung
date: Fri, 18 Oct 2013 19:44:40 -0700
changeset 5967: ee99e1a7c5fb
parent 5959: d248425bcfe8
parent 5929: 8f4bb1773fd9
child 5970: 662c154d2749
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/defaultMethods.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "compiler/compileBroker.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
 #include "interpreter/bytecode.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/linkResolver.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/objArrayOop.hpp"
 #include "prims/methodHandles.hpp"
 #include "prims/nativeLookup.hpp"
 #include "runtime/compilationPolicy.hpp"
 #include "runtime/fieldDescriptor.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/reflection.hpp"
 #include "runtime/signature.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/vmThread.hpp"
 //------------------------------------------------------------------------------------------------------------------------
 // Implementation of CallInfo
 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
   int vtable_index = Method::nonvirtual_vtable_index;
   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
 }
 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
   // This is only called for interface methods. If the resolved_method
   // comes from java/lang/Object, it can be the subject of a virtual call, so
   // we should pick the vtable index from the resolved method.
   // In that case, the caller must call set_virtual instead of set_interface.
   assert(resolved_method->method_holder()->is_interface(), "");
   assert(itable_index == resolved_method()->itable_index(), "");
   set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
 }
 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
   assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
   assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
   CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
   set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
   assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
 }
 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
   if (resolved_method.is_null()) {
     THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
   }
   KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
   assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
          resolved_method->is_compiled_lambda_form(),
          "linkMethod must return one of these");
   int vtable_index = Method::nonvirtual_vtable_index;
   assert(!resolved_method->has_vtable_index(), "");
   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
   _resolved_appendix    = resolved_appendix;
   _resolved_method_type = resolved_method_type;
 }
 void CallInfo::set_common(KlassHandle resolved_klass,
                           KlassHandle selected_klass,
                           methodHandle resolved_method,
                           methodHandle selected_method,
                           CallKind kind,
                           int index,
                           TRAPS) {
   assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
   _resolved_klass  = resolved_klass;
   _selected_klass  = selected_klass;
   _resolved_method = resolved_method;
   _selected_method = selected_method;
   _call_kind       = kind;
   _call_index      = index;
   _resolved_appendix = Handle();
   DEBUG_ONLY(verify());  // verify before making side effects
   if (CompilationPolicy::must_be_compiled(selected_method)) {
     // This path is unusual, mostly used by the '-Xcomp' stress test mode.
     // Note: with several active threads, the must_be_compiled may be true
     //       while can_be_compiled is false; remove assert
     // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
     if (THREAD->is_Compiler_thread()) {
       // don't force compilation, resolve was on behalf of compiler
       return;
     }
     if (selected_method->method_holder()->is_not_initialized()) {
       // 'is_not_initialized' means not only '!is_initialized', but also that
       // initialization has not been started yet ('!being_initialized')
       // Do not force compilation of methods in uninitialized classes.
       // Note that doing this would throw an assert later,
       // in CompileBroker::compile_method.
       // We sometimes use the link resolver to do reflective lookups
       // even before classes are initialized.
       return;
     }
     CompileBroker::compile_method(selected_method, InvocationEntryBci,
                                   CompilationPolicy::policy()->initial_compile_level(),
                                   methodHandle(), 0, "must_be_compiled", CHECK);
   }
 }
 // utility query for unreflecting a method
 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
   Klass* resolved_method_holder = resolved_method->method_holder();
   if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
     resolved_klass = resolved_method_holder;
   }
   _resolved_klass  = resolved_klass;
   _selected_klass  = resolved_klass;
   _resolved_method = resolved_method;
   _selected_method = resolved_method;
   // classify:
   CallKind kind = CallInfo::unknown_kind;
   int index = resolved_method->vtable_index();
   if (resolved_method->can_be_statically_bound()) {
     kind = CallInfo::direct_call;
   } else if (!resolved_method_holder->is_interface()) {
     // Could be an Object method inherited into an interface, but still a vtable call.
     kind = CallInfo::vtable_call;
   } else if (!resolved_klass->is_interface()) {
     // A miranda method.  Compute the vtable index.
     ResourceMark rm;
     klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
     index = vt->index_of_miranda(resolved_method->name(),
                                  resolved_method->signature());
     kind = CallInfo::vtable_call;
   } else if (resolved_method->has_vtable_index()) {
     // Can occur if an interface redeclares a method of Object.
 #ifdef ASSERT
     // Ensure that this is really the case.
     KlassHandle object_klass = SystemDictionary::Object_klass();
     Method * object_resolved_method = object_klass()->vtable()->method_at(index);
     assert(object_resolved_method->name() == resolved_method->name(),
       err_msg("Object and interface method names should match at vtable index %d, %s != %s",
       index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
     assert(object_resolved_method->signature() == resolved_method->signature(),
       err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
       index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
 #endif // ASSERT
     kind = CallInfo::vtable_call;
   } else {
     // A regular interface call.
     kind = CallInfo::itable_call;
     index = resolved_method->itable_index();
   }
   assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
   _call_kind  = kind;
   _call_index = index;
   _resolved_appendix = Handle();
   DEBUG_ONLY(verify());
 }
 #ifdef ASSERT
 void CallInfo::verify() {
   switch (call_kind()) {  // the meaning and allowed value of index depends on kind
   case CallInfo::direct_call:
     if (_call_index == Method::nonvirtual_vtable_index)  break;
     // else fall through to check vtable index:
   case CallInfo::vtable_call:
     assert(resolved_klass()->verify_vtable_index(_call_index), "");
     break;
   case CallInfo::itable_call:
     assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
     break;
   case CallInfo::unknown_kind:
     assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
     break;
   default:
     fatal(err_msg_res("Unexpected call kind %d", call_kind()));
   }
 }
 #endif //ASSERT
 //------------------------------------------------------------------------------------------------------------------------
 // Klass resolution
 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
   if (!Reflection::verify_class_access(ref_klass(),
                                        sel_klass(),
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_IllegalAccessError(),
       "tried to access class %s from class %s",
       sel_klass->external_name(),
       ref_klass->external_name()
     );
     return;
   }
 }
 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
   Klass* result_oop = pool->klass_ref_at(index, CHECK);
   result = KlassHandle(THREAD, result_oop);
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Method resolution
 //
 // According to JVM spec. $5.4.3c & $5.4.3d
 // Look up method in klasses, including static methods
 // Then look up local default methods
 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
   Method* result_oop = klass->uncached_lookup_method(name, signature);
   if (result_oop == NULL) {
     Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
     if (default_methods != NULL) {
       result_oop = InstanceKlass::find_method(default_methods, name, signature);
     }
   }
   if (EnableInvokeDynamic && result_oop != NULL) {
     vmIntrinsics::ID iid = result_oop->intrinsic_id();
     if (MethodHandles::is_signature_polymorphic(iid)) {
       // Do not link directly to these.  The VM must produce a synthetic one using lookup_polymorphic_method.
       return;
     }
   }
   result = methodHandle(THREAD, result_oop);
 }
 // returns first instance method
 // Looks up method in classes, then looks up local default methods
 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
   Method* result_oop = klass->uncached_lookup_method(name, signature);
   result = methodHandle(THREAD, result_oop);
   while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
     klass = KlassHandle(THREAD, result->method_holder()->super());
     result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));
   }
   if (result.is_null()) {
     Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
     if (default_methods != NULL) {
       result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
       assert(result.is_null() || !result->is_static(), "static defaults not allowed");
     }
   }
 }
 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
                                           methodHandle resolved_method, TRAPS) {
   int vtable_index = Method::invalid_vtable_index;
   Symbol* name = resolved_method->name();
   Symbol* signature = resolved_method->signature();
   // First check in default method array
   if (!resolved_method->is_abstract()  &&
     (InstanceKlass::cast(klass())->default_methods() != NULL)) {
     int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
     if (index >= 0 ) {
       vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
     }
   }
   if (vtable_index == Method::invalid_vtable_index) {
     // get vtable_index for miranda methods
     ResourceMark rm(THREAD);
     klassVtable *vt = InstanceKlass::cast(klass())->vtable();
     vtable_index = vt->index_of_miranda(name, signature);
   }
   return vtable_index;
 }
 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
   InstanceKlass *ik = InstanceKlass::cast(klass());
   result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));
 }
 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
                                              KlassHandle klass, Symbol* name, Symbol* full_signature,
                                              KlassHandle current_klass,
                                              Handle *appendix_result_or_null,
                                              Handle *method_type_result,
                                              TRAPS) {
   vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
   if (TraceMethodHandles) {
     ResourceMark rm(THREAD);
     tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
                   vmIntrinsics::name_at(iid), klass->external_name(),
                   name->as_C_string(), full_signature->as_C_string());
   }
   if (EnableInvokeDynamic &&
       klass() == SystemDictionary::MethodHandle_klass() &&
       iid != vmIntrinsics::_none) {
     if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
       // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
       // Do not erase last argument type (MemberName) if it is a static linkTo method.
       bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
       TempNewSymbol basic_signature =
         MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
       if (TraceMethodHandles) {
         ResourceMark rm(THREAD);
         tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
                       name->as_C_string(),
                       full_signature->as_C_string(),
                       basic_signature->as_C_string());
       }
       result = SystemDictionary::find_method_handle_intrinsic(iid,
                                                               basic_signature,
                                                               CHECK);
       if (result.not_null()) {
         assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
         assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
         assert(basic_signature == result->signature(), "predict the result signature");
         if (TraceMethodHandles) {
           tty->print("lookup_polymorphic_method => intrinsic ");
           result->print_on(tty);
         }
         return;
       }
     } else if (iid == vmIntrinsics::_invokeGeneric
                && !THREAD->is_Compiler_thread()
                && appendix_result_or_null != NULL) {
       // This is a method with type-checking semantics.
       // We will ask Java code to spin an adapter method for it.
       if (!MethodHandles::enabled()) {
         // Make sure the Java part of the runtime has been booted up.
         Klass* natives = SystemDictionary::MethodHandleNatives_klass();
         if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
           SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
                                             Handle(),
                                             Handle(),
                                             true,
                                             CHECK);
         }
       }
       Handle appendix;
       Handle method_type;
       result = SystemDictionary::find_method_handle_invoker(name,
                                                             full_signature,
                                                             current_klass,
                                                             &appendix,
                                                             &method_type,
                                                             CHECK);
       if (TraceMethodHandles) {
         tty->print("lookup_polymorphic_method => (via Java) ");
         result->print_on(tty);
         tty->print("  lookup_polymorphic_method => appendix = ");
         if (appendix.is_null())  tty->print_cr("(none)");
         else                     appendix->print_on(tty);
       }
       if (result.not_null()) {
 #ifdef ASSERT
         ResourceMark rm(THREAD);
         TempNewSymbol basic_signature =
           MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
         int actual_size_of_params = result->size_of_parameters();
         int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
         // +1 for MethodHandle.this, +1 for trailing MethodType
         if (!MethodHandles::is_signature_polymorphic_static(iid))  expected_size_of_params += 1;
         if (appendix.not_null())                                   expected_size_of_params += 1;
         if (actual_size_of_params != expected_size_of_params) {
           tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
           tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
           result->print();
         }
         assert(actual_size_of_params == expected_size_of_params,
                err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
 #endif //ASSERT
         assert(appendix_result_or_null != NULL, "");
         (*appendix_result_or_null) = appendix;
         (*method_type_result)      = method_type;
         return;
       }
     }
   }
 }
 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
                                               KlassHandle resolved_klass,
                                               KlassHandle sel_klass,
                                               methodHandle sel_method,
                                               TRAPS) {
   AccessFlags flags = sel_method->access_flags();
   // Special case:  arrays always override "clone". JVMS 2.15.
   // If the resolved klass is an array class, and the declaring class
   // is java.lang.Object and the method is "clone", set the flags
   // to public.
   //
   // We'll check for the method name first, as that's most likely
   // to be false (so we'll short-circuit out of these tests).
   if (sel_method->name() == vmSymbols::clone_name() &&
       sel_klass() == SystemDictionary::Object_klass() &&
       resolved_klass->oop_is_array()) {
     // We need to change "protected" to "public".
     assert(flags.is_protected(), "clone not protected?");
     jint new_flags = flags.as_int();
     new_flags = new_flags & (~JVM_ACC_PROTECTED);
     new_flags = new_flags | JVM_ACC_PUBLIC;
     flags.set_flags(new_flags);
   }
 //  assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
   if (!Reflection::verify_field_access(ref_klass(),
                                        resolved_klass(),
                                        sel_klass(),
                                        flags,
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_IllegalAccessError(),
       "tried to access method %s.%s%s from class %s",
       sel_klass->external_name(),
       sel_method->name()->as_C_string(),
       sel_method->signature()->as_C_string(),
       ref_klass->external_name()
     );
     return;
   }
 }
 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
                                              Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
   // This method is used only
   // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
   // and
   // (2) in Bytecode_invoke::static_target
   // It appears to fail when applied to an invokeinterface call site.
   // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
   // resolve klass
   if (code == Bytecodes::_invokedynamic) {
     resolved_klass = SystemDictionary::MethodHandle_klass();
     Symbol* method_name = vmSymbols::invoke_name();
     Symbol* method_signature = pool->signature_ref_at(index);
     KlassHandle  current_klass(THREAD, pool->pool_holder());
     resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
     return;
   }
   resolve_klass(resolved_klass, pool, index, CHECK);
   Symbol*  method_name       = pool->name_ref_at(index);
   Symbol*  method_signature  = pool->signature_ref_at(index);
   KlassHandle  current_klass(THREAD, pool->pool_holder());
   if (pool->has_preresolution()
       || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
           MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
     Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
     if (result_oop != NULL) {
       resolved_method = methodHandle(THREAD, result_oop);
       return;
     }
   }
   if (code == Bytecodes::_invokeinterface) {
     resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
   } else if (code == Bytecodes::_invokevirtual) {
     resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
   } else {
     resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
   }
 }
 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
                                   Symbol* method_name, Symbol* method_signature,
                                   KlassHandle current_klass, bool check_access,
                                   bool require_methodref, TRAPS) {
   Handle nested_exception;
   // 1. check if methodref required, that resolved_klass is not interfacemethodref
   if (require_methodref && resolved_klass->is_interface()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
         resolved_klass()->external_name());
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // 2. lookup method in resolved klass and its super klasses
   lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
   if (resolved_method.is_null()) { // not found in the class hierarchy
     // 3. lookup method in all the interfaces implemented by the resolved klass
     lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
     if (resolved_method.is_null()) {
       // JSR 292:  see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
       lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
                                 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
       if (HAS_PENDING_EXCEPTION) {
         nested_exception = Handle(THREAD, PENDING_EXCEPTION);
         CLEAR_PENDING_EXCEPTION;
       }
     }
     if (resolved_method.is_null()) {
       // 4. method lookup failed
       ResourceMark rm(THREAD);
       THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
                       Method::name_and_sig_as_C_string(resolved_klass(),
                                                               method_name,
                                                               method_signature),
                       nested_exception);
     }
   }
   // 5. check if method is concrete
   if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(resolved_klass(),
                                                       method_name,
                                                       method_signature));
   }
   // 6. access checks, access checking may be turned off when calling from within the VM.
   if (check_access) {
     assert(current_klass.not_null() , "current_klass should not be null");
     // check if method can be accessed by the referring class
     check_method_accessability(current_klass,
                                resolved_klass,
                                KlassHandle(THREAD, resolved_method->method_holder()),
                                resolved_method,
                                CHECK);
     // check loader constraints
     Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
     Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
     {
       ResourceMark rm(THREAD);
       Symbol* failed_type_symbol =
         SystemDictionary::check_signature_loaders(method_signature, loader,
                                                   class_loader, true, CHECK);
       if (failed_type_symbol != NULL) {
         const char* msg = "loader constraint violation: when resolving method"
           " \"%s\" the class loader (instance of %s) of the current class, %s,"
           " and the class loader (instance of %s) for the method's defining class, %s, have"
           " different Class objects for the type %s used in the signature";
         char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
         const char* loader1 = SystemDictionary::loader_name(loader());
         char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
         const char* loader2 = SystemDictionary::loader_name(class_loader());
         char* target = InstanceKlass::cast(resolved_method->method_holder())
                        ->name()->as_C_string();
         char* failed_type_name = failed_type_symbol->as_C_string();
         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
           strlen(current) + strlen(loader2) + strlen(target) +
           strlen(failed_type_name) + 1;
         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
                      target, failed_type_name);
         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
       }
     }
   }
 }
 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
                                             KlassHandle resolved_klass,
                                             Symbol* method_name,
                                             Symbol* method_signature,
                                             KlassHandle current_klass,
                                             bool check_access, TRAPS) {
  // check if klass is interface
   if (!resolved_klass->is_interface()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // lookup method in this interface or its super, java.lang.Object
   lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
   if (resolved_method.is_null()) {
     // lookup method in all the super-interfaces
     lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
     if (resolved_method.is_null()) {
       // no method found
       ResourceMark rm(THREAD);
       THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
                 Method::name_and_sig_as_C_string(resolved_klass(),
                                                         method_name,
                                                         method_signature));
     }
   }
   if (check_access) {
     // JDK8 adds non-public interface methods, and accessability check requirement
     assert(current_klass.not_null() , "current_klass should not be null");
     // check if method can be accessed by the referring class
     check_method_accessability(current_klass,
                                resolved_klass,
                                KlassHandle(THREAD, resolved_method->method_holder()),
                                resolved_method,
                                CHECK);
     HandleMark hm(THREAD);
     Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
     Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
     {
       ResourceMark rm(THREAD);
       Symbol* failed_type_symbol =
         SystemDictionary::check_signature_loaders(method_signature, loader,
                                                   class_loader, true, CHECK);
       if (failed_type_symbol != NULL) {
         const char* msg = "loader constraint violation: when resolving "
           "interface method \"%s\" the class loader (instance of %s) of the "
           "current class, %s, and the class loader (instance of %s) for "
           "the method's defining class, %s, have different Class objects for the type %s "
           "used in the signature";
         char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
         const char* loader1 = SystemDictionary::loader_name(loader());
         char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
         const char* loader2 = SystemDictionary::loader_name(class_loader());
         char* target = InstanceKlass::cast(resolved_method->method_holder())
                        ->name()->as_C_string();
         char* failed_type_name = failed_type_symbol->as_C_string();
         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
           strlen(current) + strlen(loader2) + strlen(target) +
           strlen(failed_type_name) + 1;
         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
                      target, failed_type_name);
         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
       }
     }
   }
   if (TraceItables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
                    (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
                    (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                    Method::name_and_sig_as_C_string(resolved_klass(),
                                                     resolved_method->name(),
                                                     resolved_method->signature()),
                    resolved_method->method_holder()->internal_name()
                   );
     resolved_method->access_flags().print_on(tty);
     if (resolved_method->is_default_method()) {
       tty->print("default");
     }
     if (resolved_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Field resolution
 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
                                              KlassHandle resolved_klass,
                                              KlassHandle sel_klass,
                                              fieldDescriptor& fd,
                                              TRAPS) {
   if (!Reflection::verify_field_access(ref_klass(),
                                        resolved_klass(),
                                        sel_klass(),
                                        fd.access_flags(),
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_IllegalAccessError(),
       "tried to access field %s.%s from class %s",
       sel_klass->external_name(),
       fd.name()->as_C_string(),
       ref_klass->external_name()
     );
     return;
   }
 }
 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
   // Load these early in case the resolve of the containing klass fails
   Symbol* field = pool->name_ref_at(index);
   Symbol* sig   = pool->signature_ref_at(index);
   // resolve specified klass
   KlassHandle resolved_klass;
   resolve_klass(resolved_klass, pool, index, CHECK);
   KlassHandle  current_klass(THREAD, pool->pool_holder());
   resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
 }
 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
                                  KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
                                  TRAPS) {
   assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
          byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield  ||
          (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
   bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
   bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic);
   // Check if there's a resolved klass containing the field
   if (resolved_klass.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
   }
   // Resolve instance field
   KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
   // check if field exists; i.e., if a klass containing the field def has been selected
   if (sel_klass.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
   }
   if (!check_access)
     // Access checking may be turned off when calling from within the VM.
     return;
   // check access
   check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
   // check for errors
   if (is_static != fd.is_static()) {
     ResourceMark rm(THREAD);
     char msg[200];
     jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
   }
   // Final fields can only be accessed from its own class.
   if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
     THROW(vmSymbols::java_lang_IllegalAccessError());
   }
   // initialize resolved_klass if necessary
   // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
   //         according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
   //
   // note 2: we don't want to force initialization if we are just checking
   //         if the field access is legal; e.g., during compilation
   if (is_static && initialize_class) {
     sel_klass->initialize(CHECK);
   }
   if (sel_klass() != current_klass()) {
     HandleMark hm(THREAD);
     Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
     Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
     {
       ResourceMark rm(THREAD);
       Symbol* failed_type_symbol =
         SystemDictionary::check_signature_loaders(sig,
                                                   ref_loader, sel_loader,
                                                   false,
                                                   CHECK);
       if (failed_type_symbol != NULL) {
         const char* msg = "loader constraint violation: when resolving field"
           " \"%s\" the class loader (instance of %s) of the referring class, "
           "%s, and the class loader (instance of %s) for the field's resolved "
           "type, %s, have different Class objects for that type";
         char* field_name = field->as_C_string();
         const char* loader1 = SystemDictionary::loader_name(ref_loader());
         char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
         const char* loader2 = SystemDictionary::loader_name(sel_loader());
         char* failed_type_name = failed_type_symbol->as_C_string();
         size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
           strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
         jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
                      failed_type_name);
         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
       }
     }
   }
   // return information. note that the klass is set to the actual klass containing the
   // field, otherwise access of static fields in superclasses will not work.
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Invoke resolution
 //
 // Naming conventions:
 //
 // resolved_method    the specified method (i.e., static receiver specified via constant pool index)
 // sel_method         the selected method  (selected via run-time lookup; e.g., based on dynamic receiver class)
 // resolved_klass     the specified klass  (i.e., specified via constant pool index)
 // recv_klass         the receiver klass
 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
                                        Symbol* method_signature, KlassHandle current_klass,
                                        bool check_access, bool initialize_class, TRAPS) {
   methodHandle resolved_method;
   linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
   // Initialize klass (this should only happen if everything is ok)
   if (initialize_class && resolved_klass->should_be_initialized()) {
     resolved_klass->initialize(CHECK);
     linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   }
   // setup result
   result.set_static(resolved_klass, resolved_method, CHECK);
 }
 // throws linktime exceptions
 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
                                                   Symbol* method_name, Symbol* method_signature,
                                                   KlassHandle current_klass, bool check_access, TRAPS) {
   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
   assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
   // check if static
   if (!resolved_method->is_static()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
                                                       resolved_method->name(),
                                                       resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
 }
 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
                                         Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
   methodHandle resolved_method;
   linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
 }
 // throws linktime exceptions
 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
                                                    Symbol* method_name, Symbol* method_signature,
                                                    KlassHandle current_klass, bool check_access, TRAPS) {
   // Invokespecial is called for multiple special reasons:
   // <init>
   // local private method invocation, for classes and interfaces
   // superclass.method, which can also resolve to a default method
   // and the selected method is recalculated relative to the direct superclass
   // superinterface.method, which explicitly does not check shadowing
   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
   // check if method name is <init>, that it is found in same klass as static type
   if (resolved_method->name() == vmSymbols::object_initializer_name() &&
       resolved_method->method_holder() != resolved_klass()) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_NoSuchMethodError(),
       "%s: method %s%s not found",
       resolved_klass->external_name(),
       resolved_method->name()->as_C_string(),
       resolved_method->signature()->as_C_string()
     );
     return;
   }
   // check if not static
   if (resolved_method->is_static()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf),
                  "Expecting non-static method %s",
                  Method::name_and_sig_as_C_string(resolved_klass(),
                                                          resolved_method->name(),
                                                          resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   if (TraceItables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
                 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
                 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                 Method::name_and_sig_as_C_string(resolved_klass(),
                                                  resolved_method->name(),
                                                  resolved_method->signature()),
                 resolved_method->method_holder()->internal_name()
                );
     resolved_method->access_flags().print_on(tty);
     if (resolved_method->is_default_method()) {
       tty->print("default");
     }
     if (resolved_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
 }
 // throws runtime exceptions
 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
                                                   KlassHandle current_klass, bool check_access, TRAPS) {
   // resolved method is selected method unless we have an old-style lookup
   // for a superclass method
   // Invokespecial for a superinterface, resolved method is selected method,
   // no checks for shadowing
   methodHandle sel_method(THREAD, resolved_method());
   // check if this is an old-style super call and do a new lookup if so
   { KlassHandle method_klass  = KlassHandle(THREAD,
                                             resolved_method->method_holder());
     if (check_access &&
         // a) check if ACC_SUPER flag is set for the current class
         (current_klass->is_super() || !AllowNonVirtualCalls) &&
         // b) check if the class of the resolved_klass is a superclass
         // (not supertype in order to exclude interface classes) of the current class.
         // This check is not performed for super.invoke for interface methods
         // in super interfaces.
         current_klass->is_subclass_of(resolved_klass()) &&
         current_klass() != resolved_klass() &&
         // c) check if the method is not <init>
         resolved_method->name() != vmSymbols::object_initializer_name()) {
       // Lookup super method
       KlassHandle super_klass(THREAD, current_klass->super());
       lookup_instance_method_in_klasses(sel_method, super_klass,
                            resolved_method->name(),
                            resolved_method->signature(), CHECK);
       // check if found
       if (sel_method.is_null()) {
         ResourceMark rm(THREAD);
         THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
                   Method::name_and_sig_as_C_string(resolved_klass(),
                                             resolved_method->name(),
                                             resolved_method->signature()));
       }
     }
   }
   // check if not static
   if (sel_method->is_static()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
                                                                                                              resolved_method->name(),
                                                                                                              resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // check if abstract
   if (sel_method->is_abstract()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(resolved_klass(),
                                                       sel_method->name(),
                                                       sel_method->signature()));
   }
   if (TraceItables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
                  (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                  Method::name_and_sig_as_C_string(resolved_klass(),
                                                   sel_method->name(),
                                                   sel_method->signature()),
                  sel_method->method_holder()->internal_name()
                 );
     sel_method->access_flags().print_on(tty);
     if (sel_method->is_default_method()) {
       tty->print("default");
     }
     if (sel_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
   // setup result
   result.set_static(resolved_klass, sel_method, CHECK);
 }
 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
                                         Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
                                         bool check_access, bool check_null_and_abstract, TRAPS) {
   methodHandle resolved_method;
   linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
 }
 // throws linktime exceptions
 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
                                                    Symbol* method_name, Symbol* method_signature,
                                                    KlassHandle current_klass, bool check_access, TRAPS) {
   // normal method resolution
   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
   // check if private interface method
   if (resolved_klass->is_interface() && resolved_method->is_private()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
                  Method::name_and_sig_as_C_string(resolved_klass(),
                                                   resolved_method->name(),
                                                   resolved_method->signature()),
                    (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // check if not static
   if (resolved_method->is_static()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
                                                                                                              resolved_method->name(),
                                                                                                              resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   if (PrintVtables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
                    (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
                    (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                    Method::name_and_sig_as_C_string(resolved_klass(),
                                                     resolved_method->name(),
                                                     resolved_method->signature()),
                    resolved_method->method_holder()->internal_name()
                   );
     resolved_method->access_flags().print_on(tty);
     if (resolved_method->is_default_method()) {
       tty->print("default");
     }
     if (resolved_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
 }
 // throws runtime exceptions
 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
                                                   methodHandle resolved_method,
                                                   KlassHandle resolved_klass,
                                                   Handle recv,
                                                   KlassHandle recv_klass,
                                                   bool check_null_and_abstract,
                                                   TRAPS) {
   // setup default return values
   int vtable_index = Method::invalid_vtable_index;
   methodHandle selected_method;
   assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
   // runtime method resolution
   if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
     THROW(vmSymbols::java_lang_NullPointerException());
   }
   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
   // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
   // a missing receiver might result in a bogus lookup.
   assert(resolved_method->method_holder()->is_linked(), "must be linked");
   // do lookup based on receiver klass using the vtable index
   if (resolved_method->method_holder()->is_interface()) { // miranda method
     vtable_index = vtable_index_of_interface_method(resolved_klass,
                            resolved_method, CHECK);
     assert(vtable_index >= 0 , "we should have valid vtable index at this point");
     InstanceKlass* inst = InstanceKlass::cast(recv_klass());
     selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
   } else {
     // at this point we are sure that resolved_method is virtual and not
     // a miranda method; therefore, it must have a valid vtable index.
     assert(!resolved_method->has_itable_index(), "");
     vtable_index = resolved_method->vtable_index();
     // We could get a negative vtable_index for final methods,
     // because as an optimization they are they are never put in the vtable,
     // unless they override an existing method.
     // If we do get a negative, it means the resolved method is the the selected
     // method, and it can never be changed by an override.
     if (vtable_index == Method::nonvirtual_vtable_index) {
       assert(resolved_method->can_be_statically_bound(), "cannot override this method");
       selected_method = resolved_method;
     } else {
       // recv_klass might be an arrayKlassOop but all vtables start at
       // the same place. The cast is to avoid virtual call and assertion.
       InstanceKlass* inst = (InstanceKlass*)recv_klass();
       selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
     }
   }
   // check if method exists
   if (selected_method.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(resolved_klass(),
                                                       resolved_method->name(),
                                                       resolved_method->signature()));
   }
   // check if abstract
   if (check_null_and_abstract && selected_method->is_abstract()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(resolved_klass(),
                                                       selected_method->name(),
                                                       selected_method->signature()));
   }
   if (PrintVtables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
                    (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
                    (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                    Method::name_and_sig_as_C_string(resolved_klass(),
                                                     resolved_method->name(),
                                                     resolved_method->signature()),
                    selected_method->method_holder()->internal_name(),
                    vtable_index
                   );
     selected_method->access_flags().print_on(tty);
     if (selected_method->is_default_method()) {
       tty->print("default");
     }
     if (selected_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
   // setup result
   result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
 }
 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
                                           Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
                                           bool check_access, bool check_null_and_abstract, TRAPS) {
   methodHandle resolved_method;
   linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
 }
 // throws linktime exceptions
 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
                                                      Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
   // normal interface method resolution
   resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
 }
 // throws runtime exceptions
 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
                                                     Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
   // check if receiver exists
   if (check_null_and_abstract && recv.is_null()) {
     THROW(vmSymbols::java_lang_NullPointerException());
   }
   // check if private interface method
   if (resolved_klass->is_interface() && resolved_method->is_private()) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
                  Method::name_and_sig_as_C_string(resolved_klass(),
                                                   resolved_method->name(),
                                                   resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // check if receiver klass implements the resolved interface
   if (!recv_klass->is_subtype_of(resolved_klass())) {
     ResourceMark rm(THREAD);
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
                  recv_klass()->external_name(),
                  resolved_klass()->external_name());
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
   // do lookup based on receiver klass
   methodHandle sel_method;
   lookup_instance_method_in_klasses(sel_method, recv_klass,
             resolved_method->name(),
             resolved_method->signature(), CHECK);
   if (sel_method.is_null() && !check_null_and_abstract) {
     // In theory this is a harmless placeholder value, but
     // in practice leaving in null affects the nsk default method tests.
     // This needs further study.
     sel_method = resolved_method;
   }
   // check if method exists
   if (sel_method.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(recv_klass(),
                                                       resolved_method->name(),
                                                       resolved_method->signature()));
   }
   // check access
   // Throw Illegal Access Error if sel_method is not public.
   if (!sel_method->is_public()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
               Method::name_and_sig_as_C_string(recv_klass(),
                                                sel_method->name(),
                                                sel_method->signature()));
   }
   // check if abstract
   if (check_null_and_abstract && sel_method->is_abstract()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               Method::name_and_sig_as_C_string(recv_klass(),
                                                       sel_method->name(),
                                                       sel_method->signature()));
   }
   // setup result
   if (!resolved_method->has_itable_index()) {
     int vtable_index = resolved_method->vtable_index();
     assert(vtable_index == sel_method->vtable_index(), "sanity check");
     result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
     return;
   }
   int itable_index = resolved_method()->itable_index();
   if (TraceItables && Verbose) {
     ResourceMark rm(THREAD);
     tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
                    (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
                    (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
                    Method::name_and_sig_as_C_string(resolved_klass(),
                                                     resolved_method->name(),
                                                     resolved_method->signature()),
                    sel_method->method_holder()->internal_name()
                   );
     sel_method->access_flags().print_on(tty);
     if (sel_method->is_default_method()) {
       tty->print("default");
     }
     if (sel_method->is_overpass()) {
       tty->print("overpass");
     }
     tty->cr();
   }
   result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
 }
 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
                                                  KlassHandle resolved_klass,
                                                  Symbol* method_name,
                                                  Symbol* method_signature,
                                                  KlassHandle current_klass,
                                                  bool check_access) {
   EXCEPTION_MARK;
   methodHandle method_result;
   linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   } else {
     return method_result;
   }
 }
 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
                                                  KlassHandle resolved_klass,
                                                  Symbol* method_name,
                                                  Symbol* method_signature,
                                                  KlassHandle current_klass,
                                                  bool check_access) {
   EXCEPTION_MARK;
   methodHandle method_result;
   linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   } else {
     return method_result;
   }
 }
 methodHandle LinkResolver::resolve_virtual_call_or_null(
                                                  KlassHandle receiver_klass,
                                                  KlassHandle resolved_klass,
                                                  Symbol* name,
                                                  Symbol* signature,
                                                  KlassHandle current_klass) {
   EXCEPTION_MARK;
   CallInfo info;
   resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   }
   return info.selected_method();
 }
 methodHandle LinkResolver::resolve_interface_call_or_null(
                                                  KlassHandle receiver_klass,
                                                  KlassHandle resolved_klass,
                                                  Symbol* name,
                                                  Symbol* signature,
                                                  KlassHandle current_klass) {
   EXCEPTION_MARK;
   CallInfo info;
   resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   }
   return info.selected_method();
 }
 int LinkResolver::resolve_virtual_vtable_index(
                                                KlassHandle receiver_klass,
                                                KlassHandle resolved_klass,
                                                Symbol* name,
                                                Symbol* signature,
                                                KlassHandle current_klass) {
   EXCEPTION_MARK;
   CallInfo info;
   resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return Method::invalid_vtable_index;
   }
   return info.vtable_index();
 }
 methodHandle LinkResolver::resolve_static_call_or_null(
                                                   KlassHandle resolved_klass,
                                                   Symbol* name,
                                                   Symbol* signature,
                                                   KlassHandle current_klass) {
   EXCEPTION_MARK;
   CallInfo info;
   resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   }
   return info.selected_method();
 }
 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
                                                         KlassHandle current_klass) {
   EXCEPTION_MARK;
   CallInfo info;
   resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
     return methodHandle();
   }
   return info.selected_method();
 }
 //------------------------------------------------------------------------------------------------------------------------
 // ConstantPool entries
 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
   switch (byte) {
     case Bytecodes::_invokestatic   : resolve_invokestatic   (result,       pool, index, CHECK); break;
     case Bytecodes::_invokespecial  : resolve_invokespecial  (result,       pool, index, CHECK); break;
     case Bytecodes::_invokevirtual  : resolve_invokevirtual  (result, recv, pool, index, CHECK); break;
     case Bytecodes::_invokehandle   : resolve_invokehandle   (result,       pool, index, CHECK); break;
     case Bytecodes::_invokedynamic  : resolve_invokedynamic  (result,       pool, index, CHECK); break;
     case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
   }
   return;
 }
 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
                                 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
    // resolve klass
   resolve_klass(resolved_klass, pool, index, CHECK);
   // Get name, signature, and static klass
   method_name      = pool->name_ref_at(index);
   method_signature = pool->signature_ref_at(index);
   current_klass    = KlassHandle(THREAD, pool->pool_holder());
 }
 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
   KlassHandle  resolved_klass;
   Symbol* method_name = NULL;
   Symbol* method_signature = NULL;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
 }
 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
   KlassHandle  resolved_klass;
   Symbol* method_name = NULL;
   Symbol* method_signature = NULL;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
 }
 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
                                           constantPoolHandle pool, int index,
                                           TRAPS) {
   KlassHandle  resolved_klass;
   Symbol* method_name = NULL;
   Symbol* method_signature = NULL;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
   resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
 }
 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
   KlassHandle  resolved_klass;
   Symbol* method_name = NULL;
   Symbol* method_signature = NULL;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
   resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
 }
 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
   assert(EnableInvokeDynamic, "");
   // This guy is reached from InterpreterRuntime::resolve_invokehandle.
   KlassHandle  resolved_klass;
   Symbol* method_name = NULL;
   Symbol* method_signature = NULL;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   if (TraceMethodHandles) {
     ResourceMark rm(THREAD);
     tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
   }
   resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
 }
 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
                                        Symbol* method_name, Symbol* method_signature,
                                        KlassHandle current_klass,
                                        TRAPS) {
   // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
   assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
   assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
   methodHandle resolved_method;
   Handle       resolved_appendix;
   Handle       resolved_method_type;
   lookup_polymorphic_method(resolved_method, resolved_klass,
                             method_name, method_signature,
                             current_klass, &resolved_appendix, &resolved_method_type, CHECK);
   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
 }
 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
   assert(EnableInvokeDynamic, "");
   //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
   Symbol* method_name       = pool->name_ref_at(index);
   Symbol* method_signature  = pool->signature_ref_at(index);
   KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
   // Resolve the bootstrap specifier (BSM + optional arguments).
   Handle bootstrap_specifier;
   // Check if CallSite has been bound already:
   ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
   if (cpce->is_f1_null()) {
     int pool_index = cpce->constant_pool_index();
     oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
     assert(bsm_info != NULL, "");
     // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
     bootstrap_specifier = Handle(THREAD, bsm_info);
   }
   if (!cpce->is_f1_null()) {
     methodHandle method(     THREAD, cpce->f1_as_method());
     Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
     Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
     result.set_handle(method, appendix, method_type, CHECK);
     return;
   }
   if (TraceMethodHandles) {
       ResourceMark rm(THREAD);
       tty->print_cr("resolve_invokedynamic #%d %s %s",
                   ConstantPool::decode_invokedynamic_index(index),
                   method_name->as_C_string(), method_signature->as_C_string());
     tty->print("  BSM info: "); bootstrap_specifier->print();
   }
   resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
 }
 void LinkResolver::resolve_dynamic_call(CallInfo& result,
                                         Handle bootstrap_specifier,
                                         Symbol* method_name, Symbol* method_signature,
                                         KlassHandle current_klass,
                                         TRAPS) {
   // JSR 292:  this must resolve to an implicitly generated method MH.linkToCallSite(*...)
   // The appendix argument is likely to be a freshly-created CallSite.
   Handle       resolved_appendix;
   Handle       resolved_method_type;
   methodHandle resolved_method =
     SystemDictionary::find_dynamic_call_site_invoker(current_klass,
                                                      bootstrap_specifier,
                                                      method_name, method_signature,
                                                      &resolved_appendix,
                                                      &resolved_method_type,
                                                      THREAD);
   if (HAS_PENDING_EXCEPTION) {
     if (TraceMethodHandles) {
       tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
       PENDING_EXCEPTION->print();
     }
     if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
       // throw these guys, since they are already wrapped
       return;
     }
     if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
       // intercept only LinkageErrors which might have failed to wrap
       return;
     }
     // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
     Handle nested_exception(THREAD, PENDING_EXCEPTION);
     CLEAR_PENDING_EXCEPTION;
     THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
   }
   result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
 }
 //------------------------------------------------------------------------------------------------------------------------
 #ifndef PRODUCT
 void CallInfo::print() {
   ResourceMark rm;
   const char* kindstr = "unknown";
   switch (_call_kind) {
   case direct_call: kindstr = "direct"; break;
   case vtable_call: kindstr = "vtable"; break;
   case itable_call: kindstr = "itable"; break;
   }
   tty->print_cr("Call %s@%d %s", kindstr, _call_index,
                 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/linkResolver.cpp@ee99e1a7c5fb (annotated)

src/share/vm/interpreter/linkResolver.cpp