jdk8-mips64-public/hotspot: src/share/vm/interpreter/linkResolver.cpp@cd5dbf694d45 (annotated)

src/share/vm/interpreter/linkResolver.cpp@cd5dbf694d45 (annotated)

src/share/vm/interpreter/linkResolver.cpp

Sat, 01 May 2010 02:42:18 -0700

author: jrose
date: Sat, 01 May 2010 02:42:18 -0700
changeset 1862: cd5dbf694d45
parent 1577: 4ce7240d622c
child 1863: 2ffde6cfe049
permissions: -rw-r--r--

6939134: JSR 292 adjustments to method handle invocation
Summary: split MethodHandle.invoke into invokeExact and invokeGeneric; also clean up JVM-to-Java interfaces
Reviewed-by: twisti

 /*
  * Copyright 1997-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_linkResolver.cpp.incl"
 //------------------------------------------------------------------------------------------------------------------------
 // Implementation of FieldAccessInfo
 void FieldAccessInfo::set(KlassHandle klass, symbolHandle name, int field_index, int field_offset,
 BasicType field_type, AccessFlags access_flags) {
   _klass        = klass;
   _name         = name;
   _field_index  = field_index;
   _field_offset = field_offset;
   _field_type   = field_type;
   _access_flags = access_flags;
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Implementation of CallInfo
 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
   int vtable_index = methodOopDesc::nonvirtual_vtable_index;
   set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
 }
 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, 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.
   // Other than that case, there is no valid vtable index to specify.
   int vtable_index = methodOopDesc::invalid_vtable_index;
   if (resolved_method->method_holder() == SystemDictionary::Object_klass()) {
     assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
     vtable_index = resolved_method->vtable_index();
   }
   set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_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 == methodOopDesc::nonvirtual_vtable_index, "valid index");
   set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
 }
 void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_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;
   _vtable_index    = vtable_index;
   if (CompilationPolicy::mustBeCompiled(selected_method)) {
     // This path is unusual, mostly used by the '-Xcomp' stress test mode.
     // Note: with several active threads, the mustBeCompiled may be true
     //       while canBeCompiled is false; remove assert
     // assert(CompilationPolicy::canBeCompiled(selected_method), "cannot compile");
     if (THREAD->is_Compiler_thread()) {
       // don't force compilation, resolve was on behalf of compiler
       return;
     }
     if (instanceKlass::cast(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,
                                   methodHandle(), 0, "mustBeCompiled", CHECK);
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Klass resolution
 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
   if (!Reflection::verify_class_access(ref_klass->as_klassOop(),
                                        sel_klass->as_klassOop(),
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbolHandles::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) {
   klassOop result_oop = pool->klass_ref_at(index, CHECK);
   result = KlassHandle(THREAD, result_oop);
 }
 void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
   klassOop result_oop =
          constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK);
   result = KlassHandle(THREAD, result_oop);
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Method resolution
 //
 // According to JVM spec. $5.4.3c & $5.4.3d
 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
   methodOop result_oop = klass->uncached_lookup_method(name(), signature());
   if (EnableMethodHandles && result_oop != NULL) {
     switch (result_oop->intrinsic_id()) {
     case vmIntrinsics::_invokeExact:
     case vmIntrinsics::_invokeGeneric:
     case vmIntrinsics::_invokeDynamic:
       // Do not link directly to these.  The VM must produce a synthetic one using lookup_implicit_method.
       return;
     }
   }
   result = methodHandle(THREAD, result_oop);
 }
 // returns first instance method
 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
   methodOop result_oop = klass->uncached_lookup_method(name(), signature());
   result = methodHandle(THREAD, result_oop);
   while (!result.is_null() && result->is_static()) {
     klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());
     result = methodHandle(THREAD, klass->uncached_lookup_method(name(), signature()));
   }
 }
 int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
   ResourceMark rm(THREAD);
   klassVtable *vt = instanceKlass::cast(klass())->vtable();
   return vt->index_of_miranda(name(), signature());
 }
 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
   instanceKlass *ik = instanceKlass::cast(klass());
   result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name(), signature()));
 }
 void LinkResolver::lookup_implicit_method(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
   if (EnableMethodHandles && MethodHandles::enabled() &&
       klass() == SystemDictionary::MethodHandle_klass() &&
       methodOopDesc::is_method_handle_invoke_name(name())) {
     methodOop result_oop = SystemDictionary::find_method_handle_invoke(name,
                                                                        signature,
                                                                        Handle(),
                                                                        Handle(),
                                                                        CHECK);
     if (result_oop != NULL) {
       assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature(), "consistent");
       result = methodHandle(THREAD, result_oop);
     }
   }
 }
 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);
   }
   if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
                                        resolved_klass->as_klassOop(),
                                        sel_klass->as_klassOop(),
                                        flags,
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbolHandles::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(methodHandle& resolved_method, KlassHandle& resolved_klass,
                                   constantPoolHandle pool, int index, TRAPS) {
   // resolve klass
   resolve_klass(resolved_klass, pool, index, CHECK);
   symbolHandle method_name      (THREAD, pool->name_ref_at(index));
   symbolHandle method_signature (THREAD, 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, CHECK);
 }
 void LinkResolver::resolve_dynamic_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
   // The class is java.dyn.MethodHandle
   resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
   symbolHandle method_name = vmSymbolHandles::invokeExact_name();
   symbolHandle method_signature(THREAD, 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, CHECK);
 }
 void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
   // resolve klass
   resolve_klass(resolved_klass, pool, index, CHECK);
   symbolHandle method_name      (THREAD, pool->name_ref_at(index));
   symbolHandle method_signature (THREAD, pool->signature_ref_at(index));
   KlassHandle  current_klass(THREAD, pool->pool_holder());
   resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
 }
 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
                                   symbolHandle method_name, symbolHandle method_signature,
                                   KlassHandle current_klass, bool check_access, TRAPS) {
   // 1. check if klass is not interface
   if (resolved_klass->is_interface()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(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.invoke(*...)
       lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, CHECK);
     }
     if (resolved_method.is_null()) {
       // 4. method lookup failed
       ResourceMark rm(THREAD);
       THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
                 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                         method_name(),
                                                         method_signature()));
     }
   }
   // 5. check if method is concrete
   if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(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, instanceKlass::cast(resolved_method->method_holder())->class_loader());
     {
       ResourceMark rm(THREAD);
       char* failed_type_name =
         SystemDictionary::check_signature_loaders(method_signature, loader,
                                                   class_loader, true, CHECK);
       if (failed_type_name != 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 resolved class, %s, have"
           " different Class objects for the type %s used in the signature";
         char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(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* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
           strlen(current) + strlen(loader2) + strlen(resolved) +
           strlen(failed_type_name);
         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
                      resolved, failed_type_name);
         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
       }
     }
   }
 }
 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
                                             KlassHandle resolved_klass,
                                             symbolHandle method_name,
                                             symbolHandle method_signature,
                                             KlassHandle current_klass,
                                             bool check_access, TRAPS) {
  // check if klass is interface
   if (!resolved_klass->is_interface()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(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(),
                 methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                         method_name(),
                                                         method_signature()));
     }
   }
   if (check_access) {
     HandleMark hm(THREAD);
     Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
     Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
     {
       ResourceMark rm(THREAD);
       char* failed_type_name =
         SystemDictionary::check_signature_loaders(method_signature, loader,
                                                   class_loader, true, CHECK);
       if (failed_type_name != 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 "
           "resolved class, %s, have different Class objects for the type %s "
           "used in the signature";
         char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(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* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
         size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
           strlen(current) + strlen(loader2) + strlen(resolved) +
           strlen(failed_type_name);
         char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
         jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
                      resolved, failed_type_name);
         THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
       }
     }
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // 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->as_klassOop(),
                                        resolved_klass->as_klassOop(),
                                        sel_klass->as_klassOop(),
                                        fd.access_flags(),
                                        true)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbolHandles::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(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
   resolve_field(result, pool, index, byte, check_only, true, CHECK);
 }
 void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
   assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
          byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield, "bad bytecode");
   bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
   bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic);
   // resolve specified klass
   KlassHandle resolved_klass;
   if (update_pool) {
     resolve_klass(resolved_klass, pool, index, CHECK);
   } else {
     resolve_klass_no_update(resolved_klass, pool, index, CHECK);
   }
   // Load these early in case the resolve of the containing klass fails
   symbolOop field = pool->name_ref_at(index);
   symbolHandle field_h (THREAD, field); // preserve in case we need the name
   symbolOop sig   = pool->signature_ref_at(index);
   // 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
   fieldDescriptor fd; // find_field initializes fd if found
   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());
   }
   // check access
   KlassHandle ref_klass(THREAD, pool->pool_holder());
   check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
   // check for errors
   if (is_static != fd.is_static()) {
     char msg[200];
     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());
     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() != pool->pool_holder()) {
     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 && !check_only) {
     sel_klass->initialize(CHECK);
   }
   {
     HandleMark hm(THREAD);
     Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader());
     Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader());
     symbolHandle signature_ref (THREAD, pool->signature_ref_at(index));
     {
       ResourceMark rm(THREAD);
       char* failed_type_name =
         SystemDictionary::check_signature_loaders(signature_ref,
                                                   ref_loader, sel_loader,
                                                   false,
                                                   CHECK);
       if (failed_type_name != 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_h()->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());
         size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
           strlen(sel) + strlen(loader2) + strlen(failed_type_name);
         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.
   KlassHandle holder (THREAD, fd.field_holder());
   symbolHandle name  (THREAD, fd.name());
   result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
 }
 //------------------------------------------------------------------------------------------------------------------------
 // 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, symbolHandle method_name,
                                        symbolHandle 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, Klass::cast(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,
                                                   symbolHandle method_name, symbolHandle method_signature,
                                                   KlassHandle current_klass, bool check_access, TRAPS) {
   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
   assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
   // check if static
   if (!resolved_method->is_static()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(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, symbolHandle method_name,
                                         symbolHandle 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,
                                                    symbolHandle method_name, symbolHandle method_signature,
                                                    KlassHandle current_klass, bool check_access, TRAPS) {
   resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, 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,
       vmSymbolHandles::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()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf),
                  "Expecting non-static method %s",
                  methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                          resolved_method->name(),
                                                          resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
 }
 // 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
   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() &&
         // b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
         current_klass->is_subtype_of(method_klass()) && current_klass() != method_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,
                            symbolHandle(THREAD, resolved_method->name()),
                            symbolHandle(THREAD, resolved_method->signature()), CHECK);
       // check if found
       if (sel_method.is_null()) {
         ResourceMark rm(THREAD);
         THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
                   methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                             resolved_method->name(),
                                             resolved_method->signature()));
       }
     }
   }
   // check if not static
   if (sel_method->is_static()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                       sel_method->name(),
                                                       sel_method->signature()));
   }
   // 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,
                                         symbolHandle method_name, symbolHandle 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,
                                                    symbolHandle method_name, symbolHandle 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, 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 not static
   if (resolved_method->is_static()) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                                                                              resolved_method->name(),
                                                                                                              resolved_method->signature()));
     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
   }
 }
 // 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 = methodOopDesc::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 methodOop's
   // has not been rewritten, and the vtable initialized.
   assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
   // Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop'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(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
   // do lookup based on receiver klass using the vtable index
   if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method
     vtable_index = vtable_index_of_miranda_method(resolved_klass,
                            symbolHandle(THREAD, resolved_method->name()),
                            symbolHandle(THREAD, resolved_method->signature()), 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.
     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 == methodOopDesc::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()->klass_part();
       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(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
                                                       selected_method->name(),
                                                       selected_method->signature()));
   }
   // 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,
                                           symbolHandle method_name, symbolHandle 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, symbolHandle method_name,
                                                      symbolHandle 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 receiver klass implements the resolved interface
   if (!recv_klass->is_subtype_of(resolved_klass())) {
     char buf[200];
     jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
                  (Klass::cast(recv_klass()))->external_name(),
                  (Klass::cast(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,
             symbolHandle(THREAD, resolved_method->name()),
             symbolHandle(THREAD, resolved_method->signature()), CHECK);
   // check if method exists
   if (sel_method.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
                                                       resolved_method->name(),
                                                       resolved_method->signature()));
   }
   // check if public
   if (!sel_method->is_public()) {
     ResourceMark rm(THREAD);
     THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(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(),
               methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
                                                       sel_method->name(),
                                                       sel_method->signature()));
   }
   // setup result
   result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
 }
 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
                                                  KlassHandle resolved_klass,
                                                  symbolHandle method_name,
                                                  symbolHandle 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,
                                                  symbolHandle method_name,
                                                  symbolHandle 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,
                                                  symbolHandle name,
                                                  symbolHandle 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,
                                                  symbolHandle name,
                                                  symbolHandle 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,
                                                symbolHandle name,
                                                symbolHandle 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 methodOopDesc::invalid_vtable_index;
   }
   return info.vtable_index();
 }
 methodHandle LinkResolver::resolve_static_call_or_null(
                                                   KlassHandle resolved_klass,
                                                   symbolHandle name,
                                                   symbolHandle 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, symbolHandle name, symbolHandle 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::_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, symbolHandle& method_name, symbolHandle& 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      = symbolHandle(THREAD, pool->name_ref_at(index));
   method_signature = symbolHandle(THREAD, 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;
   symbolHandle method_name;
   symbolHandle method_signature;
   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;
   symbolHandle method_name;
   symbolHandle method_signature;
   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;
   symbolHandle method_name;
   symbolHandle method_signature;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)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;
   symbolHandle method_name;
   symbolHandle method_signature;
   KlassHandle  current_klass;
   resolve_pool(resolved_klass, method_name,  method_signature, current_klass, pool, index, CHECK);
   KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
   resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
 }
 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) {
   assert(EnableInvokeDynamic, "");
   // This guy is reached from InterpreterRuntime::resolve_invokedynamic.
   // At this point, we only need the signature, and can ignore the name.
   symbolHandle method_signature(THREAD, pool->signature_ref_at(raw_index));  // raw_index works directly
   symbolHandle method_name = vmSymbolHandles::invokeExact_name();
   KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
   // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...)
   // The extra MH receiver will be inserted into the stack on every call.
   methodHandle resolved_method;
   lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, CHECK);
   if (resolved_method.is_null()) {
     THROW(vmSymbols::java_lang_InternalError());
   }
   result.set_virtual(resolved_klass, KlassHandle(), resolved_method, resolved_method, resolved_method->vtable_index(), CHECK);
 }
 //------------------------------------------------------------------------------------------------------------------------
 #ifndef PRODUCT
 void FieldAccessInfo::print() {
   ResourceMark rm;
   tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/linkResolver.cpp@cd5dbf694d45 (annotated)

src/share/vm/interpreter/linkResolver.cpp