1 /*

        2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

        3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

        4  *

        5  * This code is free software; you can redistribute it and/or modify it

        6  * under the terms of the GNU General Public License version 2 only, as

        7  * published by the Free Software Foundation.

        8  *

        9  * This code is distributed in the hope that it will be useful, but WITHOUT

       10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

       11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

       12  * version 2 for more details (a copy is included in the LICENSE file that

       13  * accompanied this code).

       14  *

       15  * You should have received a copy of the GNU General Public License version

       16  * 2 along with this work; if not, write to the Free Software Foundation,

       17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

       18  *

       19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

       20  * or visit www.oracle.com if you need additional information or have any

       21  * questions.

       22  *

       23  */

       24 

       25 #include "precompiled.hpp"

       26 #include "classfile/systemDictionary.hpp"

       27 #include "classfile/vmSymbols.hpp"

       28 #include "compiler/compileBroker.hpp"

       29 #include "gc_interface/collectedHeap.inline.hpp"

       30 #include "interpreter/bytecode.hpp"

       31 #include "interpreter/interpreterRuntime.hpp"

       32 #include "interpreter/linkResolver.hpp"

       33 #include "memory/resourceArea.hpp"

       34 #include "memory/universe.inline.hpp"

       35 #include "oops/instanceKlass.hpp"

       36 #include "oops/objArrayOop.hpp"

       37 #include "prims/methodHandles.hpp"

       38 #include "prims/nativeLookup.hpp"

       39 #include "runtime/compilationPolicy.hpp"

       40 #include "runtime/fieldDescriptor.hpp"

       41 #include "runtime/frame.inline.hpp"

       42 #include "runtime/handles.inline.hpp"

       43 #include "runtime/reflection.hpp"

       44 #include "runtime/signature.hpp"

       45 #include "runtime/vmThread.hpp"

       46 #ifdef TARGET_OS_FAMILY_linux

       47 # include "thread_linux.inline.hpp"

       48 #endif

       49 #ifdef TARGET_OS_FAMILY_solaris

       50 # include "thread_solaris.inline.hpp"

       51 #endif

       52 #ifdef TARGET_OS_FAMILY_windows

       53 # include "thread_windows.inline.hpp"

       54 #endif

       55 

       56 //------------------------------------------------------------------------------------------------------------------------

       57 // Implementation of FieldAccessInfo

       58 

       59 void FieldAccessInfo::set(KlassHandle klass, Symbol* name, int field_index, int field_offset,

       60 BasicType field_type, AccessFlags access_flags) {

       61   _klass        = klass;

       62   _name         = name;

       63   _field_index  = field_index;

       64   _field_offset = field_offset;

       65   _field_type   = field_type;

       66   _access_flags = access_flags;

       67 }

       68 

       69 

       70 //------------------------------------------------------------------------------------------------------------------------

       71 // Implementation of CallInfo

       72 

       73 

       74 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {

       75   int vtable_index = methodOopDesc::nonvirtual_vtable_index;

       76   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);

       77 }

       78 

       79 

       80 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {

       81   // This is only called for interface methods. If the resolved_method

       82   // comes from java/lang/Object, it can be the subject of a virtual call, so

       83   // we should pick the vtable index from the resolved method.

       84   // Other than that case, there is no valid vtable index to specify.

       85   int vtable_index = methodOopDesc::invalid_vtable_index;

       86   if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {

       87     assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");

       88     vtable_index = resolved_method->vtable_index();

       89   }

       90   set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);

       91 }

       92 

       93 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {

       94   assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index");

       95   set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);

       96 }

       97 

       98 void CallInfo::set_dynamic(methodHandle resolved_method, TRAPS) {

       99   assert(resolved_method->is_method_handle_invoke(), "");

      100   KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();

      101   assert(resolved_klass == resolved_method->method_holder(), "");

      102   int vtable_index = methodOopDesc::nonvirtual_vtable_index;

      103   assert(resolved_method->vtable_index() == vtable_index, "");

      104   set_common(resolved_klass, KlassHandle(), resolved_method, resolved_method, vtable_index, CHECK);

      105 }

      106 

      107 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {

      108   assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");

      109   _resolved_klass  = resolved_klass;

      110   _selected_klass  = selected_klass;

      111   _resolved_method = resolved_method;

      112   _selected_method = selected_method;

      113   _vtable_index    = vtable_index;

      114   if (CompilationPolicy::must_be_compiled(selected_method)) {

      115     // This path is unusual, mostly used by the '-Xcomp' stress test mode.

      116 

      117     // Note: with several active threads, the must_be_compiled may be true

      118     //       while can_be_compiled is false; remove assert

      119     // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");

      120     if (THREAD->is_Compiler_thread()) {

      121       // don't force compilation, resolve was on behalf of compiler

      122       return;

      123     }

      124     if (instanceKlass::cast(selected_method->method_holder())->is_not_initialized()) {

      125       // 'is_not_initialized' means not only '!is_initialized', but also that

      126       // initialization has not been started yet ('!being_initialized')

      127       // Do not force compilation of methods in uninitialized classes.

      128       // Note that doing this would throw an assert later,

      129       // in CompileBroker::compile_method.

      130       // We sometimes use the link resolver to do reflective lookups

      131       // even before classes are initialized.

      132       return;

      133     }

      134     CompileBroker::compile_method(selected_method, InvocationEntryBci,

      135                                   CompLevel_initial_compile,

      136                                   methodHandle(), 0, "must_be_compiled", CHECK);

      137   }

      138 }

      139 

      140 

      141 //------------------------------------------------------------------------------------------------------------------------

      142 // Klass resolution

      143 

      144 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {

      145   if (!Reflection::verify_class_access(ref_klass->as_klassOop(),

      146                                        sel_klass->as_klassOop(),

      147                                        true)) {

      148     ResourceMark rm(THREAD);

      149     Exceptions::fthrow(

      150       THREAD_AND_LOCATION,

      151       vmSymbols::java_lang_IllegalAccessError(),

      152       "tried to access class %s from class %s",

      153       sel_klass->external_name(),

      154       ref_klass->external_name()

      155     );

      156     return;

      157   }

      158 }

      159 

      160 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {

      161   klassOop result_oop = pool->klass_ref_at(index, CHECK);

      162   result = KlassHandle(THREAD, result_oop);

      163 }

      164 

      165 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {

      166   klassOop result_oop =

      167          constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK);

      168   result = KlassHandle(THREAD, result_oop);

      169 }

      170 

      171 

      172 //------------------------------------------------------------------------------------------------------------------------

      173 // Method resolution

      174 //

      175 // According to JVM spec. $5.4.3c & $5.4.3d

      176 

      177 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {

      178   methodOop result_oop = klass->uncached_lookup_method(name, signature);

      179   if (EnableInvokeDynamic && result_oop != NULL) {

      180     switch (result_oop->intrinsic_id()) {

      181     case vmIntrinsics::_invokeExact:

      182     case vmIntrinsics::_invokeGeneric:

      183     case vmIntrinsics::_invokeDynamic:

      184       // Do not link directly to these.  The VM must produce a synthetic one using lookup_implicit_method.

      185       return;

      186     }

      187   }

      188   result = methodHandle(THREAD, result_oop);

      189 }

      190 

      191 // returns first instance method

      192 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {

      193   methodOop result_oop = klass->uncached_lookup_method(name, signature);

      194   result = methodHandle(THREAD, result_oop);

      195   while (!result.is_null() && result->is_static()) {

      196     klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());

      197     result = methodHandle(THREAD, klass->uncached_lookup_method(name, signature));

      198   }

      199 }

      200 

      201 

      202 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {

      203   ResourceMark rm(THREAD);

      204   klassVtable *vt = instanceKlass::cast(klass())->vtable();

      205   return vt->index_of_miranda(name, signature);

      206 }

      207 

      208 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {

      209   instanceKlass *ik = instanceKlass::cast(klass());

      210   result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature));

      211 }

      212 

      213 void LinkResolver::lookup_implicit_method(methodHandle& result,

      214                                           KlassHandle klass, Symbol* name, Symbol* signature,

      215                                           KlassHandle current_klass,

      216                                           TRAPS) {

      217   if (EnableInvokeDynamic &&

      218       klass() == SystemDictionary::MethodHandle_klass() &&

      219       methodOopDesc::is_method_handle_invoke_name(name)) {

      220     if (!THREAD->is_Compiler_thread() && !MethodHandles::enabled()) {

      221       // Make sure the Java part of the runtime has been booted up.

      222       klassOop natives = SystemDictionary::MethodHandleNatives_klass();

      223       if (natives == NULL || instanceKlass::cast(natives)->is_not_initialized()) {

      224         SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),

      225                                           Handle(),

      226                                           Handle(),

      227                                           true,

      228                                           CHECK);

      229       }

      230     }

      231     methodOop result_oop = SystemDictionary::find_method_handle_invoke(name,

      232                                                                        signature,

      233                                                                        current_klass,

      234                                                                        CHECK);

      235     if (result_oop != NULL) {

      236       assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature, "consistent");

      237       result = methodHandle(THREAD, result_oop);

      238     }

      239   }

      240 }

      241 

      242 void LinkResolver::check_method_accessability(KlassHandle ref_klass,

      243                                               KlassHandle resolved_klass,

      244                                               KlassHandle sel_klass,

      245                                               methodHandle sel_method,

      246                                               TRAPS) {

      247 

      248   AccessFlags flags = sel_method->access_flags();

      249 

      250   // Special case:  arrays always override "clone". JVMS 2.15.

      251   // If the resolved klass is an array class, and the declaring class

      252   // is java.lang.Object and the method is "clone", set the flags

      253   // to public.

      254   //

      255   // We'll check for the method name first, as that's most likely

      256   // to be false (so we'll short-circuit out of these tests).

      257   if (sel_method->name() == vmSymbols::clone_name() &&

      258       sel_klass() == SystemDictionary::Object_klass() &&

      259       resolved_klass->oop_is_array()) {

      260     // We need to change "protected" to "public".

      261     assert(flags.is_protected(), "clone not protected?");

      262     jint new_flags = flags.as_int();

      263     new_flags = new_flags & (~JVM_ACC_PROTECTED);

      264     new_flags = new_flags | JVM_ACC_PUBLIC;

      265     flags.set_flags(new_flags);

      266   }

      267 

      268   if (!Reflection::verify_field_access(ref_klass->as_klassOop(),

      269                                        resolved_klass->as_klassOop(),

      270                                        sel_klass->as_klassOop(),

      271                                        flags,

      272                                        true)) {

      273     ResourceMark rm(THREAD);

      274     Exceptions::fthrow(

      275       THREAD_AND_LOCATION,

      276       vmSymbols::java_lang_IllegalAccessError(),

      277       "tried to access method %s.%s%s from class %s",

      278       sel_klass->external_name(),

      279       sel_method->name()->as_C_string(),

      280       sel_method->signature()->as_C_string(),

      281       ref_klass->external_name()

      282     );

      283     return;

      284   }

      285 }

      286 

      287 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass,

      288                                   constantPoolHandle pool, int index, TRAPS) {

      289 

      290   // resolve klass

      291   resolve_klass(resolved_klass, pool, index, CHECK);

      292 

      293   Symbol*  method_name       = pool->name_ref_at(index);

      294   Symbol*  method_signature  = pool->signature_ref_at(index);

      295   KlassHandle  current_klass(THREAD, pool->pool_holder());

      296 

      297   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);

      298 }

      299 

      300 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {

      301   // The class is java.lang.invoke.MethodHandle

      302   resolved_klass = SystemDictionaryHandles::MethodHandle_klass();

      303 

      304   Symbol* method_name = vmSymbols::invokeExact_name();

      305 

      306   Symbol*  method_signature = pool->signature_ref_at(index);

      307   KlassHandle  current_klass   (THREAD, pool->pool_holder());

      308 

      309   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);

      310 }

      311 

      312 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {

      313 

      314   // resolve klass

      315   resolve_klass(resolved_klass, pool, index, CHECK);

      316   Symbol*  method_name       = pool->name_ref_at(index);

      317   Symbol*  method_signature  = pool->signature_ref_at(index);

      318   KlassHandle  current_klass(THREAD, pool->pool_holder());

      319 

      320   resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);

      321 }

      322 

      323 

      324 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,

      325                                   Symbol* method_name, Symbol* method_signature,

      326                                   KlassHandle current_klass, bool check_access, TRAPS) {

      327 

      328   // 1. check if klass is not interface

      329   if (resolved_klass->is_interface()) {

      330     ResourceMark rm(THREAD);

      331     char buf[200];

      332     jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name());

      333     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      334   }

      335 

      336   // 2. lookup method in resolved klass and its super klasses

      337   lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);

      338 

      339   if (resolved_method.is_null()) { // not found in the class hierarchy

      340     // 3. lookup method in all the interfaces implemented by the resolved klass

      341     lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);

      342 

      343     if (resolved_method.is_null()) {

      344       // JSR 292:  see if this is an implicitly generated method MethodHandle.invoke(*...)

      345       lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, CHECK);

      346     }

      347 

      348     if (resolved_method.is_null()) {

      349       // 4. method lookup failed

      350       ResourceMark rm(THREAD);

      351       THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),

      352                 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      353                                                         method_name,

      354                                                         method_signature));

      355     }

      356   }

      357 

      358   // 5. check if method is concrete

      359   if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {

      360     ResourceMark rm(THREAD);

      361     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      362               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      363                                                       method_name,

      364                                                       method_signature));

      365   }

      366 

      367   // 6. access checks, access checking may be turned off when calling from within the VM.

      368   if (check_access) {

      369     assert(current_klass.not_null() , "current_klass should not be null");

      370 

      371     // check if method can be accessed by the referring class

      372     check_method_accessability(current_klass,

      373                                resolved_klass,

      374                                KlassHandle(THREAD, resolved_method->method_holder()),

      375                                resolved_method,

      376                                CHECK);

      377 

      378     // check loader constraints

      379     Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());

      380     Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());

      381     {

      382       ResourceMark rm(THREAD);

      383       char* failed_type_name =

      384         SystemDictionary::check_signature_loaders(method_signature, loader,

      385                                                   class_loader, true, CHECK);

      386       if (failed_type_name != NULL) {

      387         const char* msg = "loader constraint violation: when resolving method"

      388           " \"%s\" the class loader (instance of %s) of the current class, %s,"

      389           " and the class loader (instance of %s) for resolved class, %s, have"

      390           " different Class objects for the type %s used in the signature";

      391         char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);

      392         const char* loader1 = SystemDictionary::loader_name(loader());

      393         char* current = instanceKlass::cast(current_klass())->name()->as_C_string();

      394         const char* loader2 = SystemDictionary::loader_name(class_loader());

      395         char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();

      396         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +

      397           strlen(current) + strlen(loader2) + strlen(resolved) +

      398           strlen(failed_type_name);

      399         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);

      400         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,

      401                      resolved, failed_type_name);

      402         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);

      403       }

      404     }

      405   }

      406 }

      407 

      408 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,

      409                                             KlassHandle resolved_klass,

      410                                             Symbol* method_name,

      411                                             Symbol* method_signature,

      412                                             KlassHandle current_klass,

      413                                             bool check_access, TRAPS) {

      414 

      415  // check if klass is interface

      416   if (!resolved_klass->is_interface()) {

      417     ResourceMark rm(THREAD);

      418     char buf[200];

      419     jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name());

      420     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      421   }

      422 

      423   // lookup method in this interface or its super, java.lang.Object

      424   lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);

      425 

      426   if (resolved_method.is_null()) {

      427     // lookup method in all the super-interfaces

      428     lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);

      429     if (resolved_method.is_null()) {

      430       // no method found

      431       ResourceMark rm(THREAD);

      432       THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),

      433                 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      434                                                         method_name,

      435                                                         method_signature));

      436     }

      437   }

      438 

      439   if (check_access) {

      440     HandleMark hm(THREAD);

      441     Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());

      442     Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());

      443     {

      444       ResourceMark rm(THREAD);

      445       char* failed_type_name =

      446         SystemDictionary::check_signature_loaders(method_signature, loader,

      447                                                   class_loader, true, CHECK);

      448       if (failed_type_name != NULL) {

      449         const char* msg = "loader constraint violation: when resolving "

      450           "interface method \"%s\" the class loader (instance of %s) of the "

      451           "current class, %s, and the class loader (instance of %s) for "

      452           "resolved class, %s, have different Class objects for the type %s "

      453           "used in the signature";

      454         char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name,method_signature);

      455         const char* loader1 = SystemDictionary::loader_name(loader());

      456         char* current = instanceKlass::cast(current_klass())->name()->as_C_string();

      457         const char* loader2 = SystemDictionary::loader_name(class_loader());

      458         char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();

      459         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +

      460           strlen(current) + strlen(loader2) + strlen(resolved) +

      461           strlen(failed_type_name);

      462         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);

      463         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,

      464                      resolved, failed_type_name);

      465         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);

      466       }

      467     }

      468   }

      469 }

      470 

      471 //------------------------------------------------------------------------------------------------------------------------

      472 // Field resolution

      473 

      474 void LinkResolver::check_field_accessability(KlassHandle ref_klass,

      475                                              KlassHandle resolved_klass,

      476                                              KlassHandle sel_klass,

      477                                              fieldDescriptor& fd,

      478                                              TRAPS) {

      479   if (!Reflection::verify_field_access(ref_klass->as_klassOop(),

      480                                        resolved_klass->as_klassOop(),

      481                                        sel_klass->as_klassOop(),

      482                                        fd.access_flags(),

      483                                        true)) {

      484     ResourceMark rm(THREAD);

      485     Exceptions::fthrow(

      486       THREAD_AND_LOCATION,

      487       vmSymbols::java_lang_IllegalAccessError(),

      488       "tried to access field %s.%s from class %s",

      489       sel_klass->external_name(),

      490       fd.name()->as_C_string(),

      491       ref_klass->external_name()

      492     );

      493     return;

      494   }

      495 }

      496 

      497 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {

      498   resolve_field(result, pool, index, byte, check_only, true, CHECK);

      499 }

      500 

      501 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {

      502   assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||

      503          byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield, "bad bytecode");

      504 

      505   bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);

      506   bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic);

      507 

      508   // resolve specified klass

      509   KlassHandle resolved_klass;

      510   if (update_pool) {

      511     resolve_klass(resolved_klass, pool, index, CHECK);

      512   } else {

      513     resolve_klass_no_update(resolved_klass, pool, index, CHECK);

      514   }

      515   // Load these early in case the resolve of the containing klass fails

      516   Symbol* field = pool->name_ref_at(index);

      517   Symbol* sig   = pool->signature_ref_at(index);

      518   // Check if there's a resolved klass containing the field

      519   if( resolved_klass.is_null() ) {

      520     ResourceMark rm(THREAD);

      521     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());

      522   }

      523 

      524   // Resolve instance field

      525   fieldDescriptor fd; // find_field initializes fd if found

      526   KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));

      527   // check if field exists; i.e., if a klass containing the field def has been selected

      528   if (sel_klass.is_null()){

      529     ResourceMark rm(THREAD);

      530     THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());

      531   }

      532 

      533   // check access

      534   KlassHandle ref_klass(THREAD, pool->pool_holder());

      535   check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);

      536 

      537   // check for errors

      538   if (is_static != fd.is_static()) {

      539     ResourceMark rm(THREAD);

      540     char msg[200];

      541     jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string());

      542     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);

      543   }

      544 

      545   // Final fields can only be accessed from its own class.

      546   if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {

      547     THROW(vmSymbols::java_lang_IllegalAccessError());

      548   }

      549 

      550   // initialize resolved_klass if necessary

      551   // note 1: the klass which declared the field must be initialized (i.e, sel_klass)

      552   //         according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)

      553   //

      554   // note 2: we don't want to force initialization if we are just checking

      555   //         if the field access is legal; e.g., during compilation

      556   if (is_static && !check_only) {

      557     sel_klass->initialize(CHECK);

      558   }

      559 

      560   {

      561     HandleMark hm(THREAD);

      562     Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader());

      563     Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader());

      564     Symbol*  signature_ref  = pool->signature_ref_at(index);

      565     {

      566       ResourceMark rm(THREAD);

      567       char* failed_type_name =

      568         SystemDictionary::check_signature_loaders(signature_ref,

      569                                                   ref_loader, sel_loader,

      570                                                   false,

      571                                                   CHECK);

      572       if (failed_type_name != NULL) {

      573         const char* msg = "loader constraint violation: when resolving field"

      574           " \"%s\" the class loader (instance of %s) of the referring class, "

      575           "%s, and the class loader (instance of %s) for the field's resolved "

      576           "type, %s, have different Class objects for that type";

      577         char* field_name = field->as_C_string();

      578         const char* loader1 = SystemDictionary::loader_name(ref_loader());

      579         char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string();

      580         const char* loader2 = SystemDictionary::loader_name(sel_loader());

      581         size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +

      582           strlen(sel) + strlen(loader2) + strlen(failed_type_name);

      583         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);

      584         jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,

      585                      failed_type_name);

      586         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);

      587       }

      588     }

      589   }

      590 

      591   // return information. note that the klass is set to the actual klass containing the

      592   // field, otherwise access of static fields in superclasses will not work.

      593   KlassHandle holder (THREAD, fd.field_holder());

      594   Symbol*  name   = fd.name();

      595   result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());

      596 }

      597 

      598 

      599 //------------------------------------------------------------------------------------------------------------------------

      600 // Invoke resolution

      601 //

      602 // Naming conventions:

      603 //

      604 // resolved_method    the specified method (i.e., static receiver specified via constant pool index)

      605 // sel_method         the selected method  (selected via run-time lookup; e.g., based on dynamic receiver class)

      606 // resolved_klass     the specified klass  (i.e., specified via constant pool index)

      607 // recv_klass         the receiver klass

      608 

      609 

      610 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,

      611                                        Symbol* method_signature, KlassHandle current_klass,

      612                                        bool check_access, bool initialize_class, TRAPS) {

      613   methodHandle resolved_method;

      614   linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      615   resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder()));

      616 

      617   // Initialize klass (this should only happen if everything is ok)

      618   if (initialize_class && resolved_klass->should_be_initialized()) {

      619     resolved_klass->initialize(CHECK);

      620     linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      621   }

      622 

      623   // setup result

      624   result.set_static(resolved_klass, resolved_method, CHECK);

      625 }

      626 

      627 // throws linktime exceptions

      628 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,

      629                                                   Symbol* method_name, Symbol* method_signature,

      630                                                   KlassHandle current_klass, bool check_access, TRAPS) {

      631 

      632   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      633   assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");

      634 

      635   // check if static

      636   if (!resolved_method->is_static()) {

      637     ResourceMark rm(THREAD);

      638     char buf[200];

      639     jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      640                                                       resolved_method->name(),

      641                                                       resolved_method->signature()));

      642     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      643   }

      644 }

      645 

      646 

      647 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,

      648                                         Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {

      649   methodHandle resolved_method;

      650   linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      651   runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);

      652 }

      653 

      654 // throws linktime exceptions

      655 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,

      656                                                    Symbol* method_name, Symbol* method_signature,

      657                                                    KlassHandle current_klass, bool check_access, TRAPS) {

      658 

      659   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      660 

      661   // check if method name is <init>, that it is found in same klass as static type

      662   if (resolved_method->name() == vmSymbols::object_initializer_name() &&

      663       resolved_method->method_holder() != resolved_klass()) {

      664     ResourceMark rm(THREAD);

      665     Exceptions::fthrow(

      666       THREAD_AND_LOCATION,

      667       vmSymbols::java_lang_NoSuchMethodError(),

      668       "%s: method %s%s not found",

      669       resolved_klass->external_name(),

      670       resolved_method->name()->as_C_string(),

      671       resolved_method->signature()->as_C_string()

      672     );

      673     return;

      674   }

      675 

      676   // check if not static

      677   if (resolved_method->is_static()) {

      678     ResourceMark rm(THREAD);

      679     char buf[200];

      680     jio_snprintf(buf, sizeof(buf),

      681                  "Expecting non-static method %s",

      682                  methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      683                                                          resolved_method->name(),

      684                                                          resolved_method->signature()));

      685     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      686   }

      687 }

      688 

      689 // throws runtime exceptions

      690 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,

      691                                                   KlassHandle current_klass, bool check_access, TRAPS) {

      692 

      693   // resolved method is selected method unless we have an old-style lookup

      694   methodHandle sel_method(THREAD, resolved_method());

      695 

      696   // check if this is an old-style super call and do a new lookup if so

      697   { KlassHandle method_klass  = KlassHandle(THREAD,

      698                                             resolved_method->method_holder());

      699 

      700     if (check_access &&

      701         // a) check if ACC_SUPER flag is set for the current class

      702         current_klass->is_super() &&

      703         // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)

      704         current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() &&

      705         // c) check if the method is not <init>

      706         resolved_method->name() != vmSymbols::object_initializer_name()) {

      707       // Lookup super method

      708       KlassHandle super_klass(THREAD, current_klass->super());

      709       lookup_instance_method_in_klasses(sel_method, super_klass,

      710                            resolved_method->name(),

      711                            resolved_method->signature(), CHECK);

      712       // check if found

      713       if (sel_method.is_null()) {

      714         ResourceMark rm(THREAD);

      715         THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      716                   methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      717                                             resolved_method->name(),

      718                                             resolved_method->signature()));

      719       }

      720     }

      721   }

      722 

      723   // check if not static

      724   if (sel_method->is_static()) {

      725     ResourceMark rm(THREAD);

      726     char buf[200];

      727     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      728                                                                                                              resolved_method->name(),

      729                                                                                                              resolved_method->signature()));

      730     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      731   }

      732 

      733   // check if abstract

      734   if (sel_method->is_abstract()) {

      735     ResourceMark rm(THREAD);

      736     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      737               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      738                                                       sel_method->name(),

      739                                                       sel_method->signature()));

      740   }

      741 

      742   // setup result

      743   result.set_static(resolved_klass, sel_method, CHECK);

      744 }

      745 

      746 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,

      747                                         Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,

      748                                         bool check_access, bool check_null_and_abstract, TRAPS) {

      749   methodHandle resolved_method;

      750   linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      751   runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);

      752 }

      753 

      754 // throws linktime exceptions

      755 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,

      756                                                    Symbol* method_name, Symbol* method_signature,

      757                                                    KlassHandle current_klass, bool check_access, TRAPS) {

      758   // normal method resolution

      759   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      760 

      761   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");

      762   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");

      763 

      764   // check if not static

      765   if (resolved_method->is_static()) {

      766     ResourceMark rm(THREAD);

      767     char buf[200];

      768     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      769                                                                                                              resolved_method->name(),

      770                                                                                                              resolved_method->signature()));

      771     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      772   }

      773 }

      774 

      775 // throws runtime exceptions

      776 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,

      777                                                   methodHandle resolved_method,

      778                                                   KlassHandle resolved_klass,

      779                                                   Handle recv,

      780                                                   KlassHandle recv_klass,

      781                                                   bool check_null_and_abstract,

      782                                                   TRAPS) {

      783 

      784   // setup default return values

      785   int vtable_index = methodOopDesc::invalid_vtable_index;

      786   methodHandle selected_method;

      787 

      788   assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");

      789 

      790   // runtime method resolution

      791   if (check_null_and_abstract && recv.is_null()) { // check if receiver exists

      792     THROW(vmSymbols::java_lang_NullPointerException());

      793   }

      794 

      795   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's

      796   // has not been rewritten, and the vtable initialized.

      797   assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");

      798 

      799   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's

      800   // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since

      801   // a missing receiver might result in a bogus lookup.

      802   assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");

      803 

      804   // do lookup based on receiver klass using the vtable index

      805   if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method

      806     vtable_index = vtable_index_of_miranda_method(resolved_klass,

      807                            resolved_method->name(),

      808                            resolved_method->signature(), CHECK);

      809     assert(vtable_index >= 0 , "we should have valid vtable index at this point");

      810 

      811     instanceKlass* inst = instanceKlass::cast(recv_klass());

      812     selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));

      813   } else {

      814     // at this point we are sure that resolved_method is virtual and not

      815     // a miranda method; therefore, it must have a valid vtable index.

      816     vtable_index = resolved_method->vtable_index();

      817     // We could get a negative vtable_index for final methods,

      818     // because as an optimization they are they are never put in the vtable,

      819     // unless they override an existing method.

      820     // If we do get a negative, it means the resolved method is the the selected

      821     // method, and it can never be changed by an override.

      822     if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {

      823       assert(resolved_method->can_be_statically_bound(), "cannot override this method");

      824       selected_method = resolved_method;

      825     } else {

      826       // recv_klass might be an arrayKlassOop but all vtables start at

      827       // the same place. The cast is to avoid virtual call and assertion.

      828       instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part();

      829       selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));

      830     }

      831   }

      832 

      833   // check if method exists

      834   if (selected_method.is_null()) {

      835     ResourceMark rm(THREAD);

      836     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      837               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      838                                                       resolved_method->name(),

      839                                                       resolved_method->signature()));

      840   }

      841 

      842   // check if abstract

      843   if (check_null_and_abstract && selected_method->is_abstract()) {

      844     ResourceMark rm(THREAD);

      845     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      846               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),

      847                                                       selected_method->name(),

      848                                                       selected_method->signature()));

      849   }

      850 

      851   // setup result

      852   result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);

      853 }

      854 

      855 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,

      856                                           Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,

      857                                           bool check_access, bool check_null_and_abstract, TRAPS) {

      858   methodHandle resolved_method;

      859   linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      860   runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);

      861 }

      862 

      863 // throws linktime exceptions

      864 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,

      865                                                      Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {

      866   // normal interface method resolution

      867   resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);

      868 

      869   assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");

      870   assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");

      871 }

      872 

      873 // throws runtime exceptions

      874 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,

      875                                                     Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {

      876   // check if receiver exists

      877   if (check_null_and_abstract && recv.is_null()) {

      878     THROW(vmSymbols::java_lang_NullPointerException());

      879   }

      880 

      881   // check if receiver klass implements the resolved interface

      882   if (!recv_klass->is_subtype_of(resolved_klass())) {

      883     ResourceMark rm(THREAD);

      884     char buf[200];

      885     jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",

      886                  (Klass::cast(recv_klass()))->external_name(),

      887                  (Klass::cast(resolved_klass()))->external_name());

      888     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);

      889   }

      890   // do lookup based on receiver klass

      891   methodHandle sel_method;

      892   lookup_instance_method_in_klasses(sel_method, recv_klass,

      893             resolved_method->name(),

      894             resolved_method->signature(), CHECK);

      895   // check if method exists

      896   if (sel_method.is_null()) {

      897     ResourceMark rm(THREAD);

      898     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      899               methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),

      900                                                       resolved_method->name(),

      901                                                       resolved_method->signature()));

      902   }

      903   // check if public

      904   if (!sel_method->is_public()) {

      905     ResourceMark rm(THREAD);

      906     THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),

      907               methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),

      908                                                       sel_method->name(),

      909                                                       sel_method->signature()));

      910   }

      911   // check if abstract

      912   if (check_null_and_abstract && sel_method->is_abstract()) {

      913     ResourceMark rm(THREAD);

      914     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),

      915               methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),

      916                                                       sel_method->name(),

      917                                                       sel_method->signature()));

      918   }

      919   // setup result

      920   result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);

      921 }

      922 

      923 

      924 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(

      925                                                  KlassHandle resolved_klass,

      926                                                  Symbol* method_name,

      927                                                  Symbol* method_signature,

      928                                                  KlassHandle current_klass,

      929                                                  bool check_access) {

      930   EXCEPTION_MARK;

      931   methodHandle method_result;

      932   linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);

      933   if (HAS_PENDING_EXCEPTION) {

      934     CLEAR_PENDING_EXCEPTION;

      935     return methodHandle();

      936   } else {

      937     return method_result;

      938   }

      939 }

      940 

      941 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(

      942                                                  KlassHandle resolved_klass,

      943                                                  Symbol* method_name,

      944                                                  Symbol* method_signature,

      945                                                  KlassHandle current_klass,

      946                                                  bool check_access) {

      947   EXCEPTION_MARK;

      948   methodHandle method_result;

      949   linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);

      950   if (HAS_PENDING_EXCEPTION) {

      951     CLEAR_PENDING_EXCEPTION;

      952     return methodHandle();

      953   } else {

      954     return method_result;

      955   }

      956 }

      957 

      958 methodHandle LinkResolver::resolve_virtual_call_or_null(

      959                                                  KlassHandle receiver_klass,

      960                                                  KlassHandle resolved_klass,

      961                                                  Symbol* name,

      962                                                  Symbol* signature,

      963                                                  KlassHandle current_klass) {

      964   EXCEPTION_MARK;

      965   CallInfo info;

      966   resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);

      967   if (HAS_PENDING_EXCEPTION) {

      968     CLEAR_PENDING_EXCEPTION;

      969     return methodHandle();

      970   }

      971   return info.selected_method();

      972 }

      973 

      974 methodHandle LinkResolver::resolve_interface_call_or_null(

      975                                                  KlassHandle receiver_klass,

      976                                                  KlassHandle resolved_klass,

      977                                                  Symbol* name,

      978                                                  Symbol* signature,

      979                                                  KlassHandle current_klass) {

      980   EXCEPTION_MARK;

      981   CallInfo info;

      982   resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);

      983   if (HAS_PENDING_EXCEPTION) {

      984     CLEAR_PENDING_EXCEPTION;

      985     return methodHandle();

      986   }

      987   return info.selected_method();

      988 }

      989 

      990 int LinkResolver::resolve_virtual_vtable_index(

      991                                                KlassHandle receiver_klass,

      992                                                KlassHandle resolved_klass,

      993                                                Symbol* name,

      994                                                Symbol* signature,

      995                                                KlassHandle current_klass) {

      996   EXCEPTION_MARK;

      997   CallInfo info;

      998   resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);

      999   if (HAS_PENDING_EXCEPTION) {

     1000     CLEAR_PENDING_EXCEPTION;

     1001     return methodOopDesc::invalid_vtable_index;

     1002   }

     1003   return info.vtable_index();

     1004 }

     1005 

     1006 methodHandle LinkResolver::resolve_static_call_or_null(

     1007                                                   KlassHandle resolved_klass,

     1008                                                   Symbol* name,

     1009                                                   Symbol* signature,

     1010                                                   KlassHandle current_klass) {

     1011   EXCEPTION_MARK;

     1012   CallInfo info;

     1013   resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);

     1014   if (HAS_PENDING_EXCEPTION) {

     1015     CLEAR_PENDING_EXCEPTION;

     1016     return methodHandle();

     1017   }

     1018   return info.selected_method();

     1019 }

     1020 

     1021 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,

     1022                                                         KlassHandle current_klass) {

     1023   EXCEPTION_MARK;

     1024   CallInfo info;

     1025   resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);

     1026   if (HAS_PENDING_EXCEPTION) {

     1027     CLEAR_PENDING_EXCEPTION;

     1028     return methodHandle();

     1029   }

     1030   return info.selected_method();

     1031 }

     1032 

     1033 

     1034 

     1035 //------------------------------------------------------------------------------------------------------------------------

     1036 // ConstantPool entries

     1037 

     1038 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {

     1039   switch (byte) {

     1040     case Bytecodes::_invokestatic   : resolve_invokestatic   (result,       pool, index, CHECK); break;

     1041     case Bytecodes::_invokespecial  : resolve_invokespecial  (result,       pool, index, CHECK); break;

     1042     case Bytecodes::_invokevirtual  : resolve_invokevirtual  (result, recv, pool, index, CHECK); break;

     1043     case Bytecodes::_invokedynamic  : resolve_invokedynamic  (result,       pool, index, CHECK); break;

     1044     case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;

     1045   }

     1046   return;

     1047 }

     1048 

     1049 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,

     1050                                 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {

     1051    // resolve klass

     1052   resolve_klass(resolved_klass, pool, index, CHECK);

     1053 

     1054   // Get name, signature, and static klass

     1055   method_name      = pool->name_ref_at(index);

     1056   method_signature = pool->signature_ref_at(index);

     1057   current_klass    = KlassHandle(THREAD, pool->pool_holder());

     1058 }

     1059 

     1060 

     1061 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {

     1062   KlassHandle  resolved_klass;

     1063   Symbol* method_name = NULL;

     1064   Symbol* method_signature = NULL;

     1065   KlassHandle  current_klass;

     1066   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);

     1067   resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);

     1068 }

     1069 

     1070 

     1071 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {

     1072   KlassHandle  resolved_klass;

     1073   Symbol* method_name = NULL;

     1074   Symbol* method_signature = NULL;

     1075   KlassHandle  current_klass;

     1076   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);

     1077   resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);

     1078 }

     1079 

     1080 

     1081 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,

     1082                                           constantPoolHandle pool, int index,

     1083                                           TRAPS) {

     1084 

     1085   KlassHandle  resolved_klass;

     1086   Symbol* method_name = NULL;

     1087   Symbol* method_signature = NULL;

     1088   KlassHandle  current_klass;

     1089   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);

     1090   KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());

     1091   resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);

     1092 }

     1093 

     1094 

     1095 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {

     1096   KlassHandle  resolved_klass;

     1097   Symbol* method_name = NULL;

     1098   Symbol* method_signature = NULL;

     1099   KlassHandle  current_klass;

     1100   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);

     1101   KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());

     1102   resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);

     1103 }

     1104 

     1105 

     1106 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) {

     1107   assert(EnableInvokeDynamic, "");

     1108 

     1109   // This guy is reached from InterpreterRuntime::resolve_invokedynamic.

     1110 

     1111   // At this point, we only need the signature, and can ignore the name.

     1112   Symbol*  method_signature = pool->signature_ref_at(raw_index);  // raw_index works directly

     1113   Symbol* method_name = vmSymbols::invokeExact_name();

     1114   KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();

     1115 

     1116   // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...)

     1117   // The extra MH receiver will be inserted into the stack on every call.

     1118   methodHandle resolved_method;

     1119   KlassHandle current_klass(THREAD, pool->pool_holder());

     1120   lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, THREAD);

     1121   if (HAS_PENDING_EXCEPTION) {

     1122     if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {

     1123       // throw these guys, since they are already wrapped

     1124       return;

     1125     }

     1126     if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {

     1127       // intercept only LinkageErrors which might have failed to wrap

     1128       return;

     1129     }

     1130     // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.

     1131     Handle ex(THREAD, PENDING_EXCEPTION);

     1132     CLEAR_PENDING_EXCEPTION;

     1133     oop bsme = Klass::cast(SystemDictionary::BootstrapMethodError_klass())->java_mirror();

     1134     MethodHandles::raise_exception(Bytecodes::_athrow, ex(), bsme, CHECK);

     1135     // java code should not return, but if it does throw out anyway

     1136     THROW(vmSymbols::java_lang_InternalError());

     1137   }

     1138   if (resolved_method.is_null()) {

     1139     THROW(vmSymbols::java_lang_InternalError());

     1140   }

     1141   result.set_dynamic(resolved_method, CHECK);

     1142 }

     1143 

     1144 //------------------------------------------------------------------------------------------------------------------------

     1145 #ifndef PRODUCT

     1146 

     1147 void FieldAccessInfo::print() {

     1148   ResourceMark rm;

     1149   tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());

     1150 }

     1151 

     1152 #endif